Preparation and performance analysis of phase change microcapsule/epoxy resin composite phase change material

Preparation of phase change materials with higher heat resistance is of great significance for their popularization and application. In this study, based on phase-change microcapsules (micro-PCMs) with epoxy resin as the capsule shell, microcapsules were compounded with different types of epoxy resins to prepare micro-PCMs and epoxy resin composite phase change materials (CPCMs). The results show that by changing the micro-PCMs content in the CPCM, the phase change enthalpy of the CPCM can be flexibly adjusted within the range of 32.41–50.75 J/g. When the Micro-PCMs content was 40%, the 5% weight loss temperature of the CPCM with N, N, N', N'-tetrakis(glycidyl)-1,3-cyclohexanedi(methanamine) (TGCM) was 228.7 ℃. And after heat treatment at 160 ℃ for 30 min, the enthalpy reduction was less than 5%. With the same micro-PCM content, the heat resistance and mechanical properties of the CPCM with TGCM as the matrix are better than with hydrogenated epoxy resin (HBPA).