石墨烯包裹的PMMA微球改性环氧树脂的导热性  

Thermal Conductivity of Epoxy Resin Modified by PMMA Microspheres Ball Wrapped by Graphene

作　　者：张过有 吕程[1,3] 

机构地区：[1]重庆水利电力职业技术学院,重庆402160 [2]西南交通大学电气工程学院,四川成都610030 [3]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《塑料》2017年第3期27-29,33,共4页Plastics

基　　金：2016年重庆市教委科学技术研究项目(KJ1603601);2017年重庆市教委科学技术研究项目(KJ1735450)

摘　　要：利用悬浮聚合法和改进Hummers法分别制得粒径为200~300 nm的聚甲基丙烯酸甲酯(PMMA)微球和氧化石墨烯,再用化学还原方法将氧化石墨烯包裹在PMMA微球上,最后利用氧化石墨烯包裹的PMMA微球对环氧树脂进行改性,制得低氧化石墨烯含量的高导热率环氧树脂复合材料。包裹氧化石墨烯的PMMA微球改性后的环氧树脂复合材料微观形貌测试结果表明,氧化石墨烯包裹的PMMA微球均匀分散在环氧树脂基体中;环氧树脂复合材料的导热性在氧化石墨烯含量为0.1%、0.3%、0.5%、0.7%和1%时,导热率分别由纯环氧树脂的0.19 W/(m·K)提高到0.52、0.99、1.22、1.33和1.42 W/(m·K)。PMMA microspheres ball having a particle size of 200 to 300 nm and graphene oxide were prepared by suspension polymerization and improved Hummers method respectively, graphene oxide was wrapped in PMMA microspheres balls by chemical reduction method again,epoxy resin was modified by PMMA microspheres ball wrapped by grapheme oxide at last,the high thermal conductivity epoxy resin composites with low grapheme oxide content was made. The microstructure of epoxy resin modified by PMMA microspheres ball wrapped by graphene oxide was tesed and the result showed that PMMA microspheres ball wrapped by graphene oxide was evenly dispersed in epoxy resin;when the graphene oxide content in the epoxy resin composites was 0.1% ,0.3% ,0.5% ,0.7% and 1% ,the thermal conductivity was increased to 0. 52,0.99 ,l. 22, 1.33 and 1.42 W/（m K） from the pure epoxy resin 0.19 W/（m K） ,respectively.

关 键 词：石墨烯 聚甲基丙烯酸甲酯 环氧树脂 导热率 分散 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]