Abstract:

This paper deals with the preparation of polyethylene glycol (PEG)/silicon dioxide (SiO₂₎ composites as shapestable, solidliquid phase change material (PCM) for thermal energy storage and determination of their thermal propertiesThe result showed that it was successful to keep the same shape in the solid state by making PEG adsorbed on microporous SiO₂ network even when the temperature of the PCM was over the melting pointThe PCM also had favorable heat capacity and high thermal conductivity, which could be used in solar energy and some other applications.

摘要：

采用多孔二氧化硅（SiO₂）、聚乙二醇(PEG)等研究一种定形无机有机复合相变材料的制备方法，并加入适当的促进剂和改性剂对复合材料进行了改性。利用多孔二氧化硅具有良好的吸附性能特点，将聚乙二醇相变材料吸附在二氧化硅微孔结构内，在毛细管力和表面张力的作用下，聚乙二醇在发生固液相变的时候很难从二氧化硅的微孔结构内渗透出来，从而解决了聚乙二醇在蓄热技术中应用时的液体流动问题。同时对相变材料进行了热性能分析，实验证明该复合相变材料具有形状稳定，导热率高，储热能力大等特点。