碳气凝胶基复合相变材料的制备及其导热性能研究  

Study on preparation of carbon aerogel-based composite phase change materials and their thermal conductivity

作　　者：黄正 王朝明 王廷钧 Huang Zheng;Wang Chaoming;Wang Tingjun(School of Mechanics and Aerospace Engineering,Southwest Jiaotong University,Chengdu 611756,China;School of Chemical Engineering and Energy Technology,Dongguan University of Technology,Dongguan 523808,China)

机构地区：[1]西南交通大学力学与航空航天学院,四川成都阝611756 [2]东莞理工学院化学工程与能源技术学院,广东东莞523808

出　　处：《化学推进剂与高分子材料》2022年第6期31-36,共6页Chemical Propellants & Polymeric Materials

基　　金：中央高校基本科研业务费(2682021ZTPY022);广东省分布式能源系统重点实验室开放基金项目(2020DES4)。

摘　　要：以聚乙二醇(PEG)为相变材料,通过添加碳气凝胶,采用熔融共混和真空浸渍的方式制备了导热增强型相变复合材料。采用扫描电子显微镜、热常数分析仪、差示扫描量热仪、红外热成像仪和热重分析仪对所制备复合材料的微观结构、导热性能与相变过程进行了研究。结果表明:相比于PEG材料,片层三维网络结构的碳气凝胶可有效提高PEG的导热性能;碳气凝胶对PEG具有更加优良的定型效果,在相变过程中,能有效束缚PEG的流动,保持复合材料的形状稳定性。The thermally conductive enhanced phase change composites were prepared by melt blending and vacuum impregnating using polyethylene glycol(PEG) as the phase change material and by adding carbon aerogel. The microstructure, thermal conductivity and phase change process of the prepared composites were investigated by scanning electron microscope, thermal constant analyzer, differential scanning calorimeter, infrared thermal imager and thermogravimetric analyzer. The results showed that the carbon aerogel with lamellar three-dimensional network structure could effectively improve the thermal conductivity of PEG compared with PEG material;the carbon aerogel had a better shaping effect on PEG,and could effectively restrain the flow of PEG and maintain the shape stability of the composites during the phase change process.

关 键 词：碳气凝胶 聚乙二醇 导热 相变储能 

分 类 号：TB34[一般工业技术—材料科学与工程] TQ324.8[化学工程—合成树脂塑料工业]