PEG-沸石固-固相变材料的制备及性能

Preparation and Properties of PEG-Zeolite Solid-Solid Phase Change Material

采用接枝共聚法合成了以聚乙二醇(PEG)为相变物质,沸石为骨架的PEG-沸石固-固相变材料。通过红外光谱(FT-IR)、热失重分析(TGA)和差示扫描量热法(DSC)等测试手段对PEG-沸石固-固相变材料的结构、相变行为及热稳定性进行了研究。结果表明:通过改变PEG的分子量,可以得到不同相变焓和不同相变温度的PEG-沸石固-固相变材料,其相变焓可达105.41J/g,热稳定性良好,起始分解温度高于300℃。

PEG-zeolite solid-solid phase change material was synthesized by graft copolymerization. Poly- ethylene glycol（PEG） was used for phase change material and zeolite for skeleton, Infrared spectrometry （FT-IR）, thermogravimetry analysis（TGA） and differentia scanning calorimetric （DSC） were used to study the microstructure, phase change behavior and thermal stability of PEG-zeolite solid solid phase change material. Results show that PEG-zeolite solid-solid phase change material has different phase transition enthalpy and phase transition temperature by changing the molecular weight of PEG. The phase change enthalpy is up to 105. 41 J/g. The thermostability is so good that the initial decomposition temperature is higher than 300℃.