摘要
分别使用三种含6个羟基的化合物（山梨醇、双季戊四醇和肌醇）作为分子骨架,聚乙二醇（PEG）作为相变功能链,4,4＇-二苯基甲烷二异氰酸酯（MDI）为交联剂,合成了3种具有不同交联结构的新型固-固相变储能材料。通过傅里叶变换红外光谱（FT IR）、X-射线衍射（XRD）、偏光显微镜（POM）、示差扫描量热法（DSC）和热重量分析法（TG）分别对合成材料的分子结构、结晶性能、相变行为和热稳定性进行了研究。结果显示,所制备的材料在30~70℃温度范围内具有典型的固-固相变特性,其升温和冷却过程的相变焓最高可达107.5J/g和102.9J/g。此外,通过热重分析发现所合成材料具有较好的可重复使用性和热稳定性。因此,合成的新型固-固相变材料在热能储存和控温领域具有巨大的应用潜力。
Three kinds of new polymeric solid-solid phase change meterials （SSPCMs） with different crosslinking structures were synthesized and characterized for thermal energy storage. In the SSPCMs, the hexahydroxy compounds sorbitol, dipentaerythritol and inositol were individually employed as the molecular skeleton and polyethylene glycol （PEG） was used as the phase change functional chain. The molecular structure, cr, ystalline properties, phase change behaviors, thermal reliability and stability of the synthesized SSPCMs were investigated by FT IR, XRD, POM, DSC and TG, respectively. The results showed that the synthesized SSPCMs have high thermal energy storage density and an applicable temperature range of 30 -70℃ , and the maximum phase change enthalpy in the heating and cooling process for them is 107.5J· g^-1 and 102.9J· g^-1 , respectively. They have good reusability, excellent thermal reliability and stability from the heating-cooling thermal cycle test and TG curves. So they have potential application in the areas of thermal energy storage and temperature-control.
出处
《化学通报》
CAS
CSCD
北大核心
2016年第3期254-258,共5页
Chemistry
基金
国家青年科学基金项目(21404061)
南阳师范学院青年基金项目(QN2013050)
南阳师范学院STP项目(STP2012010)资助
关键词
固-固相变材料
相变性能
聚乙二醇
热能储存
Solid-solid phase change materials, Phase transition properties, Polyethylene glycol, Thermal energy storage
