CA-LA-MA-PA-SA/PAN/MWNTs-COOH相变复合纤维膜的结构与热性能

Morphology and Thermal Performances of CA-LA-MA-PA-SA/PAN/MWNTs-COOH Phase Change Composite Fibrous Membranes

以脂肪酸五元低共熔物(CA-LA-MA-PA-SA)为固-液相变材料,以聚丙烯腈/羧基化多壁碳纳米管(PAN/MWNTs-COOH)复合纤维膜为支撑载体,其中PAN/MWNTs-COOH的质量比例为95/5和90/10,通过物理吸附法制备CA-LA-MA-PA-SA/PAN/MWNTs-COOH定形相变复合纤维膜。系统分析了复合纤维膜的形态结构、相变温度和焓值、储放热速率。SEM观察结果表明CA-LA-MA-PA-SA五元低共熔物被成功地吸附到静电纺PAN/MWNTs-COOH复合纤维膜的多孔网络结构中。DSC测试结果表明制备的纤维膜的相变融化温度和焓值约为19℃和121~129kJ/kg。传热测试结果表明添加MWNTs-COOH后复合纤维膜的储热和放热效率得到显著提高。

Novel CA-LA-MA-PA-SA quinary eutectic was prepared as solid-liquid phase change material.Electrospun polyacrylonitrile/carboxyl purified multi-walled carbon nanotubes(PAN/MWNTs-COOH)composite fibrous membranes were fabricated as supporting materials with different mass ratios of 95/5 and 90/10.And then the CA-LA-MA-PA-SA/PAN/MWNTs-COOH form-stable phase change composite fibrous membranes were prepared by physical adsorption method.Morphological structure,thermal properties and heat transfer rates of the composite fibrous membranes were systematically observed and measured by conventional methods.SEM images show that the CA-LA-MA-PA-SA quinary eutectic is adsorbed into the porous network structure of electrospun PAN/MWNTs-COOH composite fibrous membranes.DSC results suggest that melting temperature and phase change enthalpies of form-stable phase change composite fibrous membranes are about 19℃and 121-129kJ/kg.The result of heat transfer test indicate that thermal energy storage and release rates of composite fibrous membranes are significantly improved by addition of the MWNTs-COOH.