聚乙二醇/石墨烯纳米片复合相变材料的制备及其性能研究  

Preparation and properties of polyethylene glycol/graphene nanoplates composite phase change materials

作　　者：王浩[1,2] 何丽红 杨帆[1,2] 朱洪洲 WANG Hao;HE Li-hong;YANG Fan;ZHU Hong-zhou(National and Local Joint Engineering Laboratory of Traffic Civil Engineering Materials,Chongqing Jiaotong University,Chongqing 400074,China;College of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学交通土建材料国家地方联合工程实验室,重庆400074 [2]重庆交通大学材料科学与工程学院,重庆400074

出　　处：《应用化工》2018年第6期1119-1122,1126,共5页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(51508063);重庆市研究生科研创新项目(CYS17211)

摘　　要：以聚乙二醇(PEG)作为相变工作物质,以具有优异导热性能的石墨烯纳米片(GNPs)作为导热填料,通过熔融共混法制备出一系列不同GNPs含量的PEG/GNPs复合相变材料。采用激光导热仪、差示扫描量热仪、扫描电子显微镜、X射线衍射仪、红外光谱仪等测试PEG/GNPs复合相变材料的导热性能、热物性、微观形貌、结晶性能及化学组成。结果表明,GNPs均匀分散于PEG基体中,形成能够加快热量传递的导热通路,复合材料体系的导热系数得以显著提高,而相变焓仅仅略微下降,当GNPs含量为2%时,复合材料体系的导热系数是PEG的249.7%,而相变焓损失率却仅为3.9%;PEG与GNPs二者间仅是物理吸附,并未发生化学反应,复合材料体系的结晶性能良好;PEG与GNPs复合相变材料的热响应速度更快,能源利用率因而更高。A series of PEG/GNPs composite phase change materials（ PCMs） with different mass fraction of GNPs were prepared by melt-blending method,where polyethylene glycol（ PEG） acted as a PCM and graphene nanoplates as thermal conductive filler. Laser thermal conductivity meter,DSC,SEM,XRD,FTIR were used to test the thermal conductivity,thermal properties,morphology,crystallization properties,chemical compatibility of PEG/GNPs composite PCMs,respectively. The results show that GNPs is evenly distributed in the PEG matrix,forming a conductive pathway which can accelerate heat transfer,as a result,the thermal conductivity of composite PCMs is improved remarkably,while the enthalpy just decrease slightly. When GNPs mass fraction is 2%,the thermal conductivity is 2. 497 times higher than that of pure PEG,whereas the rate of enthalpy loss is only 3. 9%;Furthermore,no chemical reactions are found between PEG and GNPs,and there is only a physical interaction,the PCMs present good crystallization properties;PEG/GNPs composite PCMs has a faster thermal response and more energy efficiency than that of pure PEG.

关 键 词：相变材料 聚乙二醇 石墨烯纳米片 导热系数 

分 类 号：TQ317[化学工程—高聚物工业] TB325.3[一般工业技术—材料科学与工程]