China Sichuan Aishipaier New Material Technology Co., Ltd. Company News

Test items: melting temperature (Tm) and melting enthalpy (∆Hm)   Sample Description: Powder   Test method: GB/T 19466.3-2004, the analytical instrument is DSC.   Test conditions:   Sample Container Type: Al;   Purge gas flow rate (nitrogen: 99.999%): 50ml/min;   Heating range: 30~160C ;   Heating rate: 20C/min.     Test Results: Test items First ramp scan (DSC curve see Figure 1) Second ramp scan (DSC curve see Figure 2) Extrapolated melt initiation temperature 61℃ In the temperature range of 30~160°C, the melting temperature and melting enthalpy were not detected Melting Peak Temperature 102℃ Extrapolated melt termination temperature 138℃ Enthalpy of fusion ∆Hm 127.6kJ/kg        

Challenges and future development of phase-changing materials：   --Material stability and cycle life   In the application of battery thermal management, the stability and cycle life of PCM are the key considerations. The stability problem mainly involves the possible performance degradation of PCM in the long-term cycle charging and discharging process, including the reduction of phase change latent heat and the change of thermal conductivity.   1.Stability problem After multiple phase change cycles, some PCMs may have the degradation of thermophysical properties, such as the reduction of phase change latent heat, which affects the thermal management effect. 2.Cycle life The ideal PCM should have a long cycle life and maintain stable thermal physical parameters to ensure long-term effective thermal management. 3.Case study Research shows that the stability and cycle life of PCM can be significantly improved by adding specific additives or adopting composite structure design.     --Method of improving thermal conductivity   Because the thermal conductivity of most PCMs is low, it limits the efficiency of heat transfer. Improving the thermal conductivity of PCM is the focus of current research.   1.Nanofillers By introducing nano-scale fillers, such as carbon nanotubes, graphene, etc., the thermal conductivity of PCM can be significantly improved. 2.Porous media PCM is combined with porous media such as metal foam or ceramics, and its high thermal conductivity is used to improve the overall heat conduction efficiency. 3.Composite materials Develop a new type of composite PCM and combine the advantages of different materials to improve thermal conductivity and thermal management performance. 4.Experimental data The experimental results show that the thermal conductivity of PCM can be increased by about 30% to 50% through the above method.     --Research and development of new phase change materials   With the development of science and technology, the research and development of new phase-changing materials has become a new trend in the field of thermal management.   1.Bio-based PCM The use of bio-based materials such as fatty acids and vegetable oils as PCM has attracted attention for its renewable and environmental friendliness. 2.High entalpy PCM Develop PCM with higher phase change latent heat to reduce the amount of materials required and reduce the overall weight of the system. 3.Intelligent response material Study the intelligent PCM that can automatically adjust the phase change temperature in response to temperature changes to meet the thermal management needs under different working conditions. 4.Future prospects The research and development of the new PCM will focus on improving thermal physical parameters, enhancing environmental adaptability and achieving intelligent control to meet the needs of future battery systems for efficient thermal management.     Company Background: Sichuan Aishipier New Material Technology Co., Ltd. (referred to as "Aishipeier"), formerly known as Chengdu Xinhai Huicai Biotechnology Co., Ltd. Its founder was involved in the research and development of cold and hot materials in 1997. The product temperature ranged from -70℃, -50℃, -40℃, -25℃, -18℃, -12℃, -5℃, 0℃, 5℃, 10℃, 18℃, 20℃, 28℃, 35℃, 50℃, 60℃, 70℃, 90℃, 110℃, 180℃. In the early years, the products were widely used in biological products, reagents, microorganisms, food, industry, fisheries, animal husbandry The cold preservation, cold storage and cold chain transportation industry of precision instruments are synchronized with the research and development of cold storage technology, cold chain verification, scheme formulation, temperature detection, etc. In 2013, the company extended its product application to the repeated use of energy storage materials and phase change materials; the product expanded to new energy, energy storage batteries, etc. in the original application field. In this link, it is used as battery viscosity, thickener, curing agent, adhesive, ultra-high adhesive, suspension agent, etc. After more than 10 years of technology precipitation. The company has a strict quality ISO9001 management system. The products have passed the testing: Shanghai Chemical Research Institute test report, national dangerous chemical test report, Swiss SGS content non-toxic safety test, REACH test report, ROHS test report, etc. With the joint efforts of all employees of the company, the products have been successfully sold to the United States, Germany, Ireland, Japan, South Korea, Russia, Saudi Arabia and other countries and regions.     Sichuan Ashpier New Material Technology Co., Ltd. Tel: 028-67933699 84906988 Email: xhhc@xhhc.net Website: http://www.xhhc.cn Hotline: 400-6463-400

Application of phase change materials in battery thermal management：   --Battery Thermal Management Strategy   The formulation of battery thermal management strategy needs to comprehensively consider the working temperature range, thermal load, thermal runaway risk and cost-effectiveness of the battery. Here are some common thermal management strategies: 1.Air cooling Suitable for battery systems with low heat load, dissipating heat through natural convection or forced convection. 2.Liquid cooling Circulate through liquid media (such as water or special coolant) to effectively absorb and disperse the heat generated by the battery. 3.Phase change cooling Use the characteristics of PCM to absorb and release heat in the phase change process to achieve stable control of battery temperature. 4.Heat pipe technology Use the efficient thermal conductivity of the heat pipe to quickly transfer heat from the battery to the cooling end. 5.Multi-level thermal management Combine the above technologies to form a composite thermal management scheme to adapt to different thermal loads and environmental conditions.     --Phase change material integration method   The integration method of phase change materials directly affects its performance in battery thermal management. The following are several strategies for integrating PCM: 1.Direct contact integration PCM is directly in contact with the surface of the battery to achieve heat exchange through heat conduction. 2.Microcapsule packaging PCM is encapsulated in microcapsules to improve its stability and safety in the battery system. 3.Composite structure design Composite PCM with high thermal conductivity materials (such as metal foam, graphene, etc.) to improve heat conduction efficiency. 4.Modular design Make PCM into a modular unit for easy installation, replacement and maintenance. 5.Active circulation system Combine PCM with active circulation system to achieve more efficient thermal management.     Performance optimization and case analysis: The goal of performance optimization is to improve the efficiency and reliability of PCM in battery thermal management. The following are some performance optimization measures and case studies: 1.Material selection Select the appropriate PCM according to the working temperature and thermal load of the battery to ensure its effective phase change within the operating temperature range of the battery. 2.Thermal property optimization Optimize the thermal physical properties parameters by adjusting the formula of PCM or adding nano fillers, such as improving the thermal conductivity and phase change latent heat. 3.Structural optimization Optimize the geometric structure and distribution of PCM to achieve more uniform heat absorption and release. 4.Case study For example, in a study, by integrating paraffin-based PCM in a lithium-ion battery module, the maximum temperature of the battery was successfully reduced by 28% and the temperature uniformity was improved. 5.Experimental verification Test the effectiveness of different integration methods and optimization measures, such as monitoring temperature changes in the battery charge and discharge cycle, and evaluating the thermal management performance of PCM. 6.Numerical simulation Use numerical simulation technology to predict the performance of different thermal management strategies and provide guidance for design and optimization. 7.Long-term performance evaluation Evaluate the performance stability of PCM in long-term recycling, such as the retention rate of phase change latent heat and the change of thermal conductivity.   Through the above strategies and methods, phase change materials can be effectively applied to the thermal management of the battery, improve the performance and life of the battery, and ensure the safety of the system.     Company Profile: Sichuan Aishipier New Material Technology Co., Ltd. (referred to as "Aishipeier"), formerly known as Chengdu Xinhai Huicai Biotechnology Co., Ltd. Its founder was involved in the research and development of cold and hot materials in 1997. The product temperature ranged from -70℃, -50℃, -40℃, -25℃, -18℃, -12℃, -5℃, 0℃, 5℃, 10℃, 18℃, 20℃, 28℃, 35℃, 50℃, 60℃, 70℃, 90℃, 110℃, 180℃. In the early years, the products were widely used in biological products, reagents, microorganisms, food, industry, fisheries, animal husbandry The cold preservation, cold storage and cold chain transportation industry of precision instruments are synchronized with the research and development of cold storage technology, cold chain verification, scheme formulation, temperature detection, etc. In 2013, the company extended its product application to the repeated use of energy storage materials and phase change materials; the product expanded to new energy, energy storage batteries, etc. in the original application field. In this link, it is used as battery viscosity, thickener, curing agent, adhesive, ultra-high adhesive, suspension agent, etc. After more than 10 years of technology precipitation. The company has a strict quality ISO9001 management system. The products have passed the testing: Shanghai Chemical Research Institute test report, national dangerous chemical test report, Swiss SGS content non-toxic safety test, REACH test report, ROHS test report, etc. With the joint efforts of all employees of the company, the products have been successfully sold to the United States, Germany, Ireland, Japan, South Korea, Russia, Saudi Arabia and other countries and regions.     Sichuan Ashpier New Material Technology Co., Ltd. Tel: 028-67933699 84906988 Email: xhhc@xhhc.net Website: http://www.xhhc.cn Hotline: 400-6463-400

The working principle of phase change materials: Phase Change Materials (PCM) is a kind of substance that can absorb or release a large amount of latent heat through the phase change process. In the field of battery storage, PCM is mainly used for thermal management to maintain the stability of battery temperature by absorbing and releasing heat during the battery charging and discharging. When the battery generates heat, PCM changes from solid to liquid and absorbs heat; when the battery needs heat, PCM changes from liquid to solid to release heat. This process helps to balance the battery temperature, extend battery life and improve performance.     Thermal physical properties of phase change materials:   --Thermal physical parameters are key indicators to evaluate the performance of PCM, including phase change temperature, phase change latent heat, specific heat capacity, thermal conductivity and density.   1.Phase change temperature refers to the temperature point at which PCM changes from solid to liquid or from liquid. For battery thermal management, it is crucial to choose the appropriate phase change temperature. 2.Phase change latent heat PCM absorbs or releases heat in the phase transformation process, and high latent heat PCM can store heat energy more effectively. 3.Thermal conductivity It affects the efficiency of heat transfer between PCM and the battery, and the high thermal conductivity contributes to rapid heat exchange.     Classification of phase-changing materials:   --PCM can be divided into different categories according to chemical composition and physical state, including organic, inorganic and ecological PCM.   1.Organic PCM Such as paraffin, fatty acids, etc., with high latent heat and low thermal conductivity. 2.Inorganic PCM Such as hydrated salt, it has a high thermal conductivity and small volume change, but it may be corrosive. 3.Ecological PCM Such as natural fat and vegetable oil, it is renewable and environmentally friendly. 4.Composite PCM It combines the advantages of different types of PCM, such as combining organic PCM with porous materials or microcapsules technology to improve its heat conduction performance and stability.     Thermal management requirements of batteries:   --Operating temperature range of the battery The battery generates heat during the charging and discharging process, and its operating temperature range has a significant impact on the performance and life of the battery. The ideal working temperature range can ensure that the battery runs safely and efficiently. Temperature range: The recommended operating temperature range for lithium-ion batteries is 0°C to 45°C. Within this range, the battery can maintain the best performance and cycle life. Temperature impact: Low temperature will lead to a decrease in battery capacity and charging efficiency; too high temperature may cause the battery to overheat or even run out of control, affecting safety and life.   --The impact of thermal management on performance Thermal management is a key factor to ensure the performance and life of the battery. Through effective thermal management, the battery temperature can be controlled to avoid extreme temperature causing damage to the battery. Performance maintenance: Good thermal management can maintain the battery at the optimal operating temperature, thus maintaining the charging and discharging efficiency and output power of the battery. Extended life: By controlling the battery temperature, it can slow down the aging process of the battery and extend the service life of the battery. Safety guarantee: Preventing battery overheating is an important task of thermal management, which can avoid the occurrence of safety accidents such as thermal runaway. Thermal management technology: including passive thermal management (such as the use of high thermal conductivity materials) and active thermal management (such as liquid cooling, air cooling, etc.), and choose the appropriate thermal management technology according to the specific needs of the battery system.     Company profile： Sichuan Aishipier New Material Technology Co., Ltd. (referred to as "Aishipeier"), formerly known as Chengdu Xinhai Huicai Biotechnology Co., Ltd. Its founder was involved in the research and development of cold and hot materials in 1997. The product temperature ranged from -70℃, -50℃, -40℃, -25℃, -18℃, -12℃, -5℃, 0℃, 5℃, 10℃, 18℃, 20℃, 28℃, 35℃, 50℃, 60℃, 70℃, 90℃, 110℃, 180℃. In the early years, the products were widely used in biological products, reagents, microorganisms, food, industry, fisheries, animal husbandry The cold preservation, cold storage and cold chain transportation industry of precision instruments are synchronized with the research and development of cold storage technology, cold chain verification, scheme formulation, temperature detection, etc. In 2013, the company extended its product application to the repeated use of energy storage materials and phase change materials; the product expanded to new energy, energy storage batteries, etc. in the original application field. In this link, it is used as battery viscosity, thickener, curing agent, adhesive, ultra-high adhesive, suspension agent, etc. After more than 10 years of technology precipitation. The company has a strict quality ISO9001 management system. The products have passed the testing: Shanghai Chemical Research Institute test report, national dangerous chemical test report, Swiss SGS content non-toxic safety test, REACH test report, ROHS test report, etc. With the joint efforts of all employees of the company, the products have been successfully sold to the United States, Germany, Ireland, Japan, South Korea, Russia, Saudi Arabia and other countries and regions. Our company can provide you with phase change materials for battery applications, please contact us.     Sichuan Ashpier New Material Technology Co., Ltd. Tel: 028-67933699 84906988 Email: xhhc@xhhc.net Website: http://www.xhhc.cn Hotline: 400-6463-400

Introduction and Background Overview With the increasing global energy demand and the increasing environmental problems, improving energy use efficiency and reducing energy consumption have become an important global issue. In the field of construction, as a major energy consumer, the development of energy-saving technology is particularly critical.     As an emerging energy-saving technology, phase change energy storage building materials have received extensive attention and research in recent years. This article will deeply discuss the application technology of phase change energy storage building materials and look forward to their future development.     Phase change material characteristics analysis Phase change material is a substance that can absorb and release a large amount of latent heat within a specific temperature range. The working principle is to use the characteristics of materials to absorb or release heat in the phase transformation process (such as solid to liquid, liquid to gaseous, etc.) to realise the storage and release of energy. Phase-changing materials have the advantages of high energy storage density, good circulation stability and good temperature adjustment effect, so they have broad application prospects in the field of building materials.     The application practice of building materials is in the field of construction. Phase change energy storage materials are mainly used in walls, roofs, floors and other building components. By embedding or coating phase change materials in building materials, it can effectively reduce the fluctuation of indoor temperature and improve indoor comfort. In addition, phase change energy storage materials can also be combined with solar energy technology, air conditioning systems, etc. to further improve the energy utilisation efficiency and energy-saving performance of buildings.     Technical advantages and energy-saving effects phase change energy storage building materials show significant advantages in energy conservation. First of all, it can effectively balance the indoor temperature and reduce the energy consumption caused by the indoor and outdoor temperature difference. Secondly, phase change materials can store energy at night or during low-load periods and release energy during the daytime or high-load periods, thus reducing the peak load of the power grid and improving the stability of the power system. Finally, through the combination of other energy-saving technologies, phase change energy storage building materials can achieve more efficient energy utilization and reduce building operating costs.     Challenges and problems Although phase change energy storage building materials have many advantages, they still face some challenges and problems in the process of practical application. First of all, the performance stability, life and cost of phase-changing materials still need to be further studied and optimized. Secondly, the promotion and application of phase change energy storage materials in the field of construction needs to overcome the difficulties of construction and high technical thresholds. In addition, compatibility and integration with existing building systems are also urgent problems to be solved.     In view of the above challenges and problems, the following strategies can be adopted to promote the development and application of phase change energy storage building materials: Strengthen basic research: deeply study the performance, stability and life of phase-changing materials, optimize the material formula and preparation process, and improve the cost performance of materials. Innovative application technology: develop phase change energy storage building materials suitable for different building components and application scenarios to improve their application scope and adaptability in the construction field. Formulate standards and norms: establish a standard system and quality evaluation system for phase change energy storage building materials to promote their standardization and popularization in the construction field. Strengthen policy guidance: through policy support, tax incentives and other measures, enterprises and scientific research institutions are encouraged to invest in the research and application of phase change energy storage building materials.     Market prospects and demand analysis With the increasing attention paid by society to energy conservation, emission reduction and sustainable development, the market prospect of phase change energy storage building materials is very broad. On the one hand, the demand for energy conservation and emission reduction in the construction field provides a broad application space for phase change energy storage materials; on the other hand, with the continuous progress of technology and the reduction of costs, phase change energy storage building materials will be more competitive in the market.     In the future, phase change energy storage building materials are expected to be more widely applied in the following aspects: first, in the field of high-end residential and commercial buildings to meet their needs for high quality and high comfort; second, in the field of green buildings and ecological city construction, giving full play to their advantages of energy conservation and environmental protection; third, in the field of intelligent buildings and the Internet of Things, to achieve construction. Intelligent management and optimization of energy.     In short, as an emerging energy-saving technology, phase change energy storage building materials have huge development potential and broad application prospects. Through continuous technological innovation and market expansion, it is believed that phase change energy storage building materials will play an increasingly important role in the future construction field.

Phase Change Materials (PCM) play an important role in the field of automotive batteries, especially in thermal management. The following is the application and function of phase change materials in the thermal management of automotive batteries:     Temperature control: The battery will generate heat during the charging and discharging process, and the uneven temperature distribution may affect the performance and life of the battery. The phase change material can absorb and release a large amount of latent heat near its phase change temperature, thus helping to maintain the stability of the battery temperature.     Thermal energy storage and release: Phase change materials absorb heat when the battery temperature rises and store it as latent heat, releasing this heat when the battery cools. This characteristic makes the phase change material an ideal thermal buffer in the battery thermal management system.     Improve battery performance: By using phase change materials, the performance decline of the battery at extreme temperatures can be reduced, and the charging and discharging efficiency of the battery and the overall performance can be improved.     Extend battery life: The uniform distribution of battery temperature helps to reduce battery aging caused by temperature differences, thus extending the service life of the battery.     Safety improvement: Overheating of the battery is a factor that causes safety problems. Phase-changing materials help prevent excessive battery temperature and reduce safety risks by absorbing excess heat.     System integration: Phase change materials can be integrated into the battery module and combined with existing cooling systems (such as air cooling and liquid cooling) to form a more efficient thermal management system .   Environmental adaptability: In a low-temperature environment, phase-changing materials can release stored heat, help the battery preheat, and improve the start-up performance of the battery under cold conditions.     Lightweight design: Compared with traditional thermal management systems, phase-changing material systems are usually lighter, which helps to improve the energy efficiency of automobiles.     Cost-effectiveness: The long service life and low maintenance cost of phase-changing materials can be used as a cost-effective thermal management solution.     Environmentally friendly: Many phase change materials are non-toxic, non-flammable and environmentally friendly.     In the thermal management of automotive batteries, there are various applications of phase change materials, which can be microencapsulated particles or composite materials combined with matrix materials (such as metal foam and porous materials). Researchers are constantly exploring new materials and methods to improve the thermal conductivity and mechanical properties of phase change materials while reducing costs to promote their commercial application in the field of automotive batteries.

The technical principle of phase change materials is to use the phase change process of matter to store and release heat. Specifically, matter has three phases: solid, liquid, and gas. When matter changes from one state (phase) to another state (phase), it will absorb or release energy, and the temperature does not change during the process. The heat is academically defined as the latent heat of phase change.     There are many types of phase change materials, and their classification standards are also diverse. According to the transition mode between the phase states of matter, it can be divided into the following four types: the phase transition between solid and solid (solid-solid phase transition), the phase transition between solid and liquid (solid-liquid phase transition), Phase transitions between gas and solid (gas-solid phase transition) and phase transitions between gas and liquid (gas-liquid phase transition).     The energy storage principle of solid-solid phase change materials is as follows: when a substance changes from one crystalline state to another, energy conversion occurs, and the purpose of energy storage can be achieved by using this process.     The characteristics of this type of phase change material are very small latent heat storage density. Compared with the volume change of solid-liquid phase transition, the volume change of solid-solid phase transition is small.     ​​​The solid-solid phase transition has an obvious advantage: it brings flexibility in container design because the requirements for the container are not high. Compared with solid-solid phase change materials, the latent heat of phase change of these two types of materials, solid-gas phase change and liquid-gas phase change, is larger.     But these two types of phase change materials have an obvious shortcoming: that is, in the process of phase change, the two Phase-change-like materials will be accompanied by the generation of a large amount of gas, which has high requirements on the airtightness of the container, thus making the easy design complex and impractical. Although the phase change enthalpy of the solid-liquid phase change material is slightly smaller than that of the gas-liquid phase change material, the volume change during the gas-liquid phase change process is 10 times the volume change during the heat storage process of the solid-liquid phase change material.     Therefore, the similar phase change enthalpy and significantly small volume change during the heat storage process make solid-liquid phase change materials considered to be a latent heat storage material with great industrial application value.     There are various classifications of solid-liquid phase change materials, which can be divided into low temperature (

Carbomer, also known as carbomer, is an acrylic acid cross-linked resin obtained by cross-linking pentaerythritol and acrylic acid. It is a very important rheology modifier. The neutralized carbomer is an excellent gel matrix. It has important uses such as thickening and suspension, with simple process and good stability. Widely used in lotions, creams, gels, ophthalmic ointments, rectal and topical preparations.   The three main functions of Carbomer: Suspension. Can permanently suspend insoluble components in the system. Emulsification. It can emulsify and stabilize in oil or water phase. Thickening. A wide range of viscosities and fluidities can be produced.     The application of Carbomer： Carbomer has a wide range of uses, such as medical. Carbomer is widely used in non-injectable formulations, especially topical liquid and semisolid formulations. Carbomer resin has been studied for the preparation of sustained-release matrix pellets, as an enzyme inhibitor of intestinal protease in preparations containing polypeptides, as an adhesive for cervical patches and as microspheres for nasal administration, And magnetic granules that position drugs for delivery into the esophagus.   --Besides. The value of carbomer in medicine is far more than that, and its main medical value is divided into the following three aspects. One is that it can be used as a sustained-release material to make controlled-release drugs for corresponding applications, such as ascorbic acid, aspirin, lithium carbonate, atropine sulfate, procaine hydrochloride, chlorpheniramine, quinine sulfate, theophylline, etc. Second, it is used as a formula for external use, and can be used as a carrier matrix to make ointments, suppositories, gels, emulsions, etc. The third is to make use of its gelling, adhesiveness, and film-forming properties. In the bioadhesive, it is used as a carrier matrix and a biopatch made of drugs. Because it is attached to the tissue mucosa for a long time, the bioavailability of the drug is improved. For example, mucous membranes are used as drug targets, including eye, nasal cavity, intestinal tract, vagina and rectal mucosa, etc. The fourth is to use its suspending ability to effectively suspend the insoluble components to form a uniformly dispersed system, which is applied to oral suspensions, and has the characteristics of safety and effectiveness, avoiding taste, maintaining stability, and improving bioavailability.       In addition to medical treatment, Carbomer 951 is also used as a thickener in the preparation of double emulsion microspheres. Carbomers are also commonly used in cosmetics. Carbomer is a stable and hygroscopic substance, heating at 104°C for 2 hours does not affect its thickening properties.   However, exposure to excessively high temperatures can cause discoloration and reduced stability. It can be completely decomposed by heating at 260°C for 30 minutes. And the safety of carbomer is also there. There are certain grades that can be used in oral formulations. It is generally believed that carbomer is basically a non-toxic and non-irritating excipient.   There is no evidence of allergic reactions to topical carbomers, but human oral doses of 1 to 3 g carbomers can be used as strong laxatives.

In today's rapid development, new materials are increasingly becoming a new absolute development trend. So, today we will talk about the pioneer of new materials---phase change materials.     Phase Change Material (PCM - Phase Change Material) refers to a substance that changes the state of matter and provides latent heat when the temperature remains unchanged.   The process of changing physical properties is called a phase change process, and the phase change material will absorb or release a large amount of latent heat at this time.     Once this material is widely used in human life, it will become the best green carrier for energy conservation and environmental protection, and it has been listed as a national research and development utilization sequence in our country.     Phase change materials can be divided into organic (Organic) and inorganic (Inorganic) phase change materials. It can also be divided into hydrated salt (Hydrated Salts) phase change materials and waxy (Paraffin Wax) phase change materials. Our most common phase change material is water, which changes from liquid to solid (freezes) at temperatures as low as 0°C. Water changes from solid to liquid (dissolves) when the temperature is above 0°C.     A large amount of cold energy is absorbed and stored during the freezing process, and a large amount of thermal energy is absorbed during the melting process. The greater the amount (volume) of ice, the longer the dissolution process will take. This is one of the most typical examples of phase change materials.   The application of phase change materials in the electric heating industry is a revolutionary change from traditional electric heating to energy-saving electric heating. Phase change thermoelectric heaters are one of the representative products. Compared with traditional electric heaters, there is no need for meter expansion. You can enjoy 24-hour heating.     Therefore, in the future, floor heating based on new materials is also a new direction for gradual development. More energy-saving and more practical.   As can be seen from the above examples, phase change materials can actually act as energy storage.This feature is of great significance in the fields of energy saving and temperature control. Therefore, phase change materials and their applications have become extensive research topics.   The biggest difference between organic phase change materials and inorganic phase change materials lies in the difference in durability and fire resistance when applied to building materials, and the latter is usually better than the former.   The introduction of phase change materials to architecture is a revolutionary development in the field of architecture. The main effect is energy saving.Energy saving is also a major trend in future development.     Now that environmentalism is prevalent, the benefits of energy conservation are self-evident. Learning, progressing in science and technology, applying new materials to life is also one of the most important developments in development.

Foreword： The low-temperature rapid micro-freezing technology adopts high-tech biotechnology to study the crystallization state of biological cells in a low temperature state, applies low-temperature ultra-low temperature technology and newly invented micro-freezing liquid of natural ingredients, and uses innovative methods for frozen aquatic products and meat foods. The freezing curve is directly frozen in the micro-freezing solution for preservation. According to the variety and the size of the object, the freezing and fresh-keeping of the food is completed within 6 to 15 minutes and 15 to 30 minutes, which means that the cell membrane in the frozen and fresh food is not frozen and is in a slightly frozen state of the organism, and then refrigerated It is called low-temperature rapid micro-freezing technology to keep frozen aquatic products and meat food fresh and fresh, and it is an innovative technology that makes the field of food preservation reach the international leading level.   Micro-frozen features: Micro-freezing is a fresh-keeping technology developed in the 1960s and 1970s to store seafood on fishing boats. Generally speaking, low-temperature preservation refers to refrigeration above 0°C, and freezer preservation refers to refrigeration below -18°C. There is an intermediate temperature zone between these two concepts, that is, 0°C~-5°C, and the preservation in this temperature zone is generally referred to as the intermediate temperature zone preservation. The middle temperature zone fresh-keeping is divided into two sections, namely ice-temperature fresh-keeping and micro-frozen fresh-keeping. Ice temperature preservation refers to storage within the temperature range of 0°C to above freezing point. Micro-freezing refers to a mild freezing method in which the product is stored at the freezing point and around -5°C, also known as supercooling or partial freezing. Compared with traditional refrigeration, this technology can significantly extend the shelf life of aquatic products by 1.5 to 4 times, and the total number of bacteria and H2S production are significantly reduced. Compared with traditional frozen storage, micro-freezing can reduce the mechanical damage, cell collapse and gas expansion caused by ice crystals generated during the freezing process, and there is no need to thaw when eating, which can reduce the loss of juice during thawing and maintain the original food.   Micro-freezing technology： Micro-freezing technology is a typical application case of phase change material technology. The phase change material with extremely high latent heat is mixed in the freezing liquid to provide continuous cooling for cells, so that cells crystallize at a constant temperature. Crystallization does not rupture cell walls, leaving cells intact to keep food fresh. This is a light freezing method of preservation.     Parameter： The density of micro-freezing liquid is 1300 times that of air, and the thermal conductivity hc=4cal/(m·hour·degree Celsius), which overcomes the large thermal resistance of air, and the thermal conductivity is nearly 30 times lower than that of micro-freezing liquid. Therefore, from electrical energy into freezing energy, the conversion rate of conduction to the frozen object is 95%, and the conduction speed is extremely fast. The time for a 3cm*10cm*6cm piece of meat to freeze in a micro-freezing liquid at -30~-35 degrees Celsius For 12 minutes, the core temperature reached -18 degrees Celsius. And in the air of -30~-35 degrees Celsius, the freezing time is 12 hours, and the core temperature reaches -18 degrees Celsius. Therefore, freezing and preserving meat of the same tonnage can save more than 40% of electricity consumption. From the figure, the phase change material curve and the micro-freezing curve are completely consistent, and the phase change material provides cooling stably and uniformly.     Frozen preservation needs to know: It is impossible to freeze food quickly by cooling air, and it takes at least 2 hours or even 12 hours to freeze aquatic products and meat products conventionally. Therefore, it cannot meet the requirement that the cell membrane of the frozen food is not broken. After scientific experiments, when the liquid is refrigerated to -30~ -35 degrees Celsius, the frozen material is put into the liquid micro-freezing liquid, 31~40 (500 grams) shrimp, only it took 6 minutes for the core temperature of the shrimp to reach -18 degrees Celsius. It was determined that the cell membrane was not damaged. After thawing, it still maintains the fresh and full-price quality, and can be refrigerated for a long time. In scientific experiments, various meat foods are used to test freezing and fresh-keeping, and the result is that the meat is more delicious, and the lactic acid in the quick-frozen meat, that is, the converted glycogen substance, can completely reduce the acid-exhausting process in the process of processing meat. Frogs, crucian carp, loach, and crayfish were used for experiments. After freezing, they were stored in a cold storage of -18 degrees Celsius for 7 days, and the temperature was slowly adjusted to thaw, and some test organisms could be resurrected. Shrimp, fish and meat products are tested by cell slices after freezing. The cell membranes are well preserved, and there is no soluble protein and cell protoplasm extravasation during thawing, so the thawing water is clear and clean. The low-temperature rapid micro-freezing technology completes the freezing and fresh-keeping process of meat in a very short time. At the same time, during the rapid freezing process, the cell membrane of the frozen object is not ruptured. After a rapid physical reaction, it is converted into polysaccharide substances. With innovative high-tech biotechnology, By changing the traditional process of removing acid, there is no soluble protein oozing out of the meat during thawing, and the thawed meat still maintains the fresh quality, maintaining the full-price nutrition of meat food, and the meat is more tender when eating. At the same time, processing enterprises have overcome the problem of dry consumption of meat in conventional freezing, and have realized the freezing and preservation of meat with no dry consumption, full price, energy saving and labor saving.     Rapid low-temperature micro-freezing technology for aquatic food： The inspiration of nature and repeated scientific experiments over the years have confirmed that the food cells are in the process of freezing and fresh-keeping, and the maximum temperature is set between -30~-35℃. However, due to the problem of heat transfer of food objects, it is impossible to freeze food quickly by cooling air, and it takes at least 2 hours or even 12 hours to freeze aquatic products and meat products conventionally. Therefore, it cannot meet the requirement that the cell membrane of the frozen food is not broken. After scientific experiments, when the liquid is refrigerated to -30~-35 °C, the frozen material is put into the liquid micro-freezing liquid, 31~40 (500 grams) shrimp, only It took 6 minutes for the central temperature of the shrimp to reach -18°C. It was determined that the cell membrane was not damaged. After thawing, it still maintains the fresh and full-price quality, and can be refrigerated for a long time. In scientific experiments, various meat foods are used to test freezing and fresh-keeping, and the result is that the meat is more delicious, and the lactic acid in the quick-frozen meat, that is, the converted glycogen substance, can completely reduce the acid-exhausting process in the process of processing meat. Frogs, crucian carp, loach, and crayfish were used for experiments. After freezing, they were stored in a cold storage of -18 °C for 7 days, and the temperature was slowly adjusted to thaw, and some test organisms could be resurrected. Shrimp, fish and meat products are tested by cell slices after freezing. The cell membranes are well preserved, and there is no soluble protein and cell protoplasm extravasation during thawing, so the thawing water is clear and clean.     Rapid cryogenic freezing technology in biological field： The specially designed ILF freezing system can meet the requirements of the Center for Disease Control and Prevention and the public security forensic medicine to preserve sampling, preserve the original state for a long time, and ensure the authenticity of legal evidence. And easy to use, all-weather standby, high technology content, and low operating costs. Currently, we are cooperating with relevant institutions to conduct research on human organs, skin, animal sperm, eggs, plasma, stem cells and other biological applications. The low-temperature rapid micro-freezing technology will make a significant contribution to human life science.     Rapid low-temperature micro-freezing technology for fruits and vegetables：   --Rapid micro-freezing can keep fruit and vegetable cells intact, and some fruits and vegetables are converted into polysaccharides during the rapid freezing process. Fruits and vegetables taste better and nutrients will not be lost. The green beans are frozen for 3 minutes by low-temperature quick micro-freezing technology, and refrigerated for 6 months. When thawed and eaten, the color is the same as when the pods are just peeled, and it is green. There is no need for processes such as heating and fixing, saving 60% of energy consumption in green bean processing. Garlic, tuber vegetables, tomatoes and other vegetables can be frozen and preserved by low-temperature rapid micro-freezing technology for long-term preservation. Lychee, cherry, bayberry, longan, mulberry, Leli fruit, cantaloupe, etc. can also be processed and preserved by low-temperature rapid micro-freezing technology. After the grapes are processed by the low-temperature rapid micro-freezing technology for 3 minutes, the sugars of the grapes can be increased, and high-quality commercial wines like ice grapes can be produced.   The application of micro-freezing technology and the economy of technology： In the low-temperature fast micro-freezing technology of aquatic products and meat, the invention and innovation of the two patents have been combined into a micro-freezing production line, which has been introduced and used by enterprises in Japan, South Korea, Guangdong, Guangxi, Hubei, Zhejiang, Hebei and other countries and regions, which fills the blank of many aquatic products in my country that cannot produce frozen and fresh-keeping raw aquatic products. Terminal products, such as raw sea shrimp, raw fish fillets, crispy carp, etc., are all exported to Japan and the United States, which have achieved high economic benefits for the company.

Purpose： Reduce body temperature, reduce local swelling, reduce congestion or bleeding, limit the spread of inflammation and suppuration, and reduce pain.     Indications： It is suitable for cooling children with fever above 38. This method should be used for children in the heat dissipation stage, such as high fever, red complexion, irritability, burning hands and feet, etc.     Operation method： Open windows for ventilation and keep the room temperature at about 25℃. Check whether the ice bag and ice bag are damaged. Place the ice bag on the patient's forehead, both sides of the neck, left and right armpits, inner thighs on both sides, etc. for about 10 minutes for each part, and replace the part in time. The ice must be replaced in time after melting.     Precautions： Observe the skin condition of the cold part every 10 minutes. If there is pallor, cyan, gray, trembling, pain or numbness, stop using it immediately. Pay attention to observe whether there is water leakage in the ice bag and ice bag at any time. Replace the cloth cover immediately after it is wet. After the ice melts, it should be replaced in time. The use time is generally 10-30 minutes or according to the doctor's advice. The ice bag is slightly more than 1 / 2 full after adding cold water. Too full ice bag will exert too much pressure on the cold compress part and affect the local blood circulation. The forbidden parts are behind the ear, precordial area, abdomen, scrotum and plantar. At the same time of cooling, a hot water bag can be placed in the foot heart to reduce the congestion of brain tissue, promote heat dissipation and increase comfort. If it is used for cooling, the body temperature shall be measured 30 minutes after the use of the ice bag. After the cooling of the underarm ice bag, the measurement of the underarm temperature shall not be carried out within 50 minutes. Because local cold stimulation will constrict blood vessels, reduce local blood supply, reduce cell activity and temperature, and return to normal in 30-60 minutes.

The baby's resistance is low. If the parents don't pay attention to the care, the baby will get sick, and often fever is accompanied by fever. Because the child is small, he can't take drugs arbitrarily, so the baby's high fever doesn't subside. What measures should the mother take to help the baby cool down? 35% alcohol bath alcohol can dilate blood vessels and take away a lot of heat when evaporating. It can be used as a method to help cool down when the baby has a fever. Prepare 100 ml of alcohol, 75% of it, warm water and the like. Keep the temperature at about 27 ~ 37 degrees. Don't be too cold, otherwise it will cause muscle contraction and make the body temperature rise again. When taking an alcohol bath, start with a small towel from the baby's neck, wipe it from top to bottom, and pat it. The parts with rich body surface arteries and blood vessels in the armpit and groin should be rubbed to make the skin slightly red, so as to help cool down. The baby's chest, abdomen and soles of feet cannot be wiped, otherwise it will lead to adverse reactions. A hot bath helps to dissipate heat. If the baby's mental state is better when he has a fever, he can take more baths, and the water temperature is between 27-37 degrees. The baby cannot take a hot bath, otherwise it will lead to systemic vasodilation and increased oxygen consumption, which is easy to lead to ischemia and hypoxia and aggravate the condition. Soaking feet in hot water can promote blood circulation and alleviate physical discomfort. When the baby has a fever, soaking feet also has the advantage of helping to cool down. Soak your feet in a foot basin or bucket and pour in 2 / 3 of the basin of water. The water temperature should be slightly higher than usual, and the temperature should be about 40 degrees. Take the baby's ability to adapt as the standard. When soaking feet, the mother touches the baby's two little girls, which can not only dilate blood vessels, but also alleviate the discomfort caused by fever.   It can be reused at the baby's head, forehead, neck, armpit, groin and other places. For cold compress with ice bags, you can buy Chemical ice bags in the store, freeze them with ice bags, wrap them with fresh-keeping film, and reuse them after use. You can also make your own ice bag at home: tie a knot with disposable medical silicone hand suit water, put it in the freezer, and take it after it is frozen into a solid. If the baby feels too cold, wrap the towel in the half water state of the ice bag, and then cold compress the baby with a towel.   When your baby has a high fever, you can make an ice pillow for your baby, which is both comfortable and good. Go to the hospital and get an ice bag (not a hot water bag). Pour the ice into the basin, beat the ice into small pieces, wash the edges and corners of the baby's head with water, put it into the ice bag, add 50 ~ 100ml of water, can't fill 2 / 3, exhaust the air, clip the bag mouth, wrap a cloth towel, and put it under the baby's head and neck as a pillow. Change it again after the ice melts, and soon the baby's temperature will drop.   Above, I introduced to you how to reduce the fever of the baby without taking medicine or injection. Of course, these are just some methods to treat the symptoms but not the root cause. If you want to fundamentally cure the baby's disease, you still need to go to a regular hospital to find a professional doctor to treat the baby. Mothers can also learn to master the methods in their hands.