形貌对石蜡/石墨烯气凝胶定形相变材料性能的影响  

Effect of Morphology on the Properties of Paraffin/Graphene Aerogel Shape-Stable Phase Change Materials

作　　者：罗李娟 张凯[3] 杨文彬[1,2] 何方方[1,2] 范敬辉[3] 吴菊英[3] 

机构地区：[1]四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,四川绵阳621010 [2]西南科技大学材料科学与工程学院,四川绵阳621010 [3]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《高分子材料科学与工程》2017年第5期93-96,101,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金委员会-中国工程物理研究院联合基金资助项目(U1530102);高分子材料工程国家重点实验室开放课题基金(sklpme2016-4-33);核废物与环境安全国防重点学科实验室开放基金(15kffk08)

摘　　要：采用原位自组装法,通过控制不同反应温度制备不同形貌的石墨烯气凝胶(GA);采用真空浸渍法制备具有较高导热、储能能力及较低渗漏率的石蜡/GA定形相变材料。对其进行扫描电镜、差示扫描量热、热导率、渗漏率表征和性能测试,并探讨GA的载入以及GA的形貌对定形相变材料性能的影响。结果表明,定形相变材料中GA不仅能够大大提高石蜡/GA定形相变材料的热导率,而且还能降低其渗漏率,而且随着GA形貌越规整,其渗漏率越低。GA的存在,在一定程度上使得定形相变材料拥有较高相变焓值。Different morphologies of graphene aerogel （GA） were prepared by controlling different reaction temperature via in situ self-assembly method. Paraffin/GA shape-stable phase change materials （SSPCMs） with higher thermal conductivity, higher energy storage capacity and lower leakage rate were prepared by the vacuum impregnation method. Microstructure, thermal property and leakage rate of SSPCMs were studied by SEM, DSC, thermal conductivity analyzer and leakage rate testing. And the addition of GA and the morphology of GA affecting the properties of SSPCMs were explored. The results show that GA in the SSPCMs not only can greatly improve the thermal conductivity of SSPCMs, but also can reduce its the leakage rate. And as the structure of GA is more regular, its leakage rate is lower. The existence of GA, to some extent, makes SSPCMs have higher enthalpy

关 键 词：石墨烯气凝胶 石蜡 定形相变材料 热导率 相变焓 

分 类 号：TB34[一般工业技术—材料科学与工程]