石蜡/膨胀珍珠岩定形相变材料的制备、封装及性能  

Preparation, encapsulation and characterization of paraffin/expanded perlite form-stable composite phase change materials

作　　者：孟多[1] 王安琪 杨籍 MENG Duo;WANG Anqi;YANG Ji(School of Civil and Architectural Engineering,Liaoning University of Technology,Jinzhou 121000,China)

机构地区：[1]辽宁工业大学土木建筑工程学院

出　　处：《功能材料》2019年第11期11194-11198,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51308275);辽宁省自然科学基金资助项目(SY2016004);辽宁工业大学大学生创新创业训练计划资助项目(201810154132)

摘　　要：为解决真空浸渍法制备的石蜡/膨胀珍珠岩复合相变材料在相变过程中石蜡泄露等问题,采用白乳胶对石蜡/膨胀珍珠岩复合相变材料进行封装。利用FT-IR测试分析封装后定形相变材料的化学结构,封装后定形复合相变材料无新物质生成,化学相容性良好。采用SEM与压汞法对膨胀珍珠岩与定形复合相变材料的孔隙特征及载体基质对石蜡吸附性进行表征,结果表明膨胀珍珠岩对石蜡吸附性能良好。封装后25与32~#石蜡/膨胀珍珠岩定形相变材料的相变温度基本保持不变,相变焓分别72.13和121.2 J/g。采用热重曲线对封装前后石蜡基定形复合相变材料热物性进行研究,封装后的定形复合相变材料热稳定性提升11.95%。To solve the problem of paraffin leakage during the phase change process of the paraffin-based composite phase change materials which was prepared by vacuum impregnation, the paraffin-based composite phase change materials was encapsulated by white latex. The chemical structure analysis of the encapsulated form-stable composite phase change materials was carried out by FT-IR. After encapsulated, the form-stable composite phase change materials was free of new substances and had a well chemical compatibility. The pore characteristics of expanded perlite and form-stable composite phase change materials and the adsorption of paraffin on the carrier matrix were characterized by SEM and mercury intrusion. The pore volume of expanded perlite after adsorption of paraffin was reduced by 91%. The DSC method was used to analyze the thermal properties of the phase change process of 25 and 32~# paraffin phase change materials after encapsulation. The phase change temperature remained basically unchanged, and the phase change enthalpy was 72.13 and 121.2 J/g. The TG curves were used to study the thermal properties of the paraffin-based composite phase change materials before and after encapsulation and the results showed that the thermal stability of the packaged composite phase change materials was improved by 11.95%.

关 键 词：复合相变材料 石蜡 膨胀珍珠岩 热物性 孔隙特征 

分 类 号：TK02[动力工程及工程热物理]