Phase change microcapsules (MPCM) with dodecyl stearate as core material,polysulfone (PSF) as wall material and nano-SiO2 as modifier were prepared by solvent evaporation method,and the effect of nano-SiO2 content on the properties of MPCM was studied.The chemical structure,morphology,phase transition properties and thermal stability of MPCM were characterized by ATR-FTIR,SEM,DSC and TG.The results showed that when the addition amount of nano-SiO2 was 3%,the surface morphology of the MPCM was the best,with the melting enthalpy and crystallization enthalpy of 116.50J/g and 110.00J/g,respectively.The encapsulation efficiency was 57.99%,and the core content was 54.81%.The microcapsule shell doped with nano-SiO2 had a good protective effect for the core material,resulting in improved thermal stability and excellent sealing performance of MPCMs.
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基金资助
江汉大学校级科研项目(2021yb023)
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