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以聚甲基丙烯酸甲酯(PMMA)为支撑材料,石蜡(PA)、聚乙二醇(PEG 6000)和硬脂酸(SA)为相变材料(PCM),采用本体聚合法制备3种不同体系的复合定形相变储热材料,综合评价各复合体系的结构、热性能以及储/放热循环稳定性。结果表明:PMMA的交联网络结构使PCM在高于其熔化融温度时不发生泄漏;支撑材料与3种PCM均没有发生显著的化学反应;相同质量百分比的三类复合体系中,PMMA与PEG的界面相容性最好,SA/PMMA体系的储热能力最强,而PEG/PMMA体系的热稳定性最佳。
Polymethylmethacrylate (PMMA) as support material, paraffin wax (PA), polyethylene glycol (PEG 6000) and stearic acid (SA) as phase change material (PCM) were prepared by bulk polymerization System of composite shaped phase change thermal storage materials, a comprehensive evaluation of the composite structure, thermal properties and storage / release cycle stability. The results show that the cross-linked network structure of PMMA does not cause any leakage of PCM above the melt-thaw temperature, and there is no significant chemical reaction between the support material and the three kinds of PCM. Among the three kinds of composites with the same mass percentage, PMMA and PEG Of the best interface compatibility, SA / PMMA system, the strongest thermal storage capacity, and PEG / PMMA system, the best thermal stability.