The Creation And Application Of Phase Change Monomer And Phase Change Skeleton

Nowadays,energy and environmental crisis is increasingly a challenge worldwide,along with the excessive exploitation and utilization of fossil energy,which leads to the gradual depletion of energy,as well as the greenhouse gas emission,environmental pollution and other issues,and has seriously influenced the sustainable development of economy.Therefore,development of efficient and sustainable energy is receiving increasing attention in the research community worldwide.Phase change material(PCM)is a kind of material that can change physical properties and provide latent heat with the temperature.The use of PCM's latent heat to control the absorption and release of energy can improve the utilization rate of energy,alleviate the problem of energy shortage and avoid environmental pollution.Among them,solid-solid phase change materials(SSPCM)with high phase transition enthalpy,controllable phase transition temperature,stable performance,not easy to leak,easy to process,etc.,has become a hot spot of research.The specific research contents of this subject include the following aspects:1.Di-hexadecanol maleic(DM)/Triallyl isocyanurate(TAIC)crosslinked copolymers as a novel solid-solid phase change materials were successfully synthesized through bulk polymerization.The test results show that the DM/TAIC cross-linked solid solid phase change materials have suitable phase change temperature in range of 28.24?37.02?,and it has high latent heat storage capacity of more than 83 J/g.In addition,DM/TAIC cross-linked solid-solid phase change materials have good thermal stability.Moreover,DM/TAIC cross-linked solid-solid phase change materials can maintain a stable shape under 100 ?.2.First,eutectic fatty acid was prepared by stearic acid(PA)and lauric acid(LA).Then PA-LA/TAIC solid-solid phase material was prepared,the eutectic fatty acids were used as phase change material,TAIC as molecular skeleton.The results show that the PA-LA/TAIC solid-solid phase change materials have suitable phase transition temperature and a higher enthalpy value in range of 26?40 ? and 58.52?110.2 J/g,respectively.At the same time,the phase transition performance will not change.Furthermore,it was found that the PA-LA/TAIC solid-solid phase change material could form a kind of nanoparticles similar to the microcapsule structure.3.Pentaerythritol(PB)/butane tetracarboxylic acid(BTCA)/polyethylene glycol(PEG)(PBPEG)crosslinking copolymers as a novel solid-solid phase change materials were successfully synthesized through the reaction mechanism and conditions of hydroxyl-carboxyl condensation reaction.The results show that the phase change materials have suitable phase change temperature,and the enthalpy was around 102.8 J/g.Moreover,it proves that phase change materials appeared good thermal stability,heat storage durability with a Td of 364 ?.4.We select acrylonitrile(AN)and allyl glycidyl ether(AGE)as the monomer and MPEG(MPEG)as phase change unit.Than the P(AGE-co-AN)-g-MPEG solid-solid phase change materials were synthesized as new solid-solid phase change materials(PAA-g-MPEG).The molecular structure of PAA-g-MPEG solid-solid phase change material was analyzed by FT-IR and 1H-NMR.In addition,it is found that PAA-g-MPEG has good solid-solid phase change characteristics and excellent energy storage and heat storage durability.