改性石墨烯对天然橡胶/丁腈橡胶复合材料热性能的影响  

Effect of Modified Graphene on Thermal Properties of Natural Rubber/Nitrile Rubber Composites

作　　者：胡宇辰 高寒阳 刘锟 胡国新[1] HU Yu-chen;GAO Han-yang;LIU Kun;HU Guo-xin(School of Mechanical and Power Engineering,Shanghai Jiao Tong University,200240 Shanghai,China;School of Mechanical Engineering,Hangzhou Dianzi University,310018 Hangzhou,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]杭州电子科技大学机械工程学院,浙江杭州310018

出　　处：《塑料工业》2020年第2期74-78,共5页China Plastics Industry

摘　　要：采用超声辅助超临界CO2方法制备石墨烯,经3-氨丙基三乙氧基硅烷(APTES)改性后,采用"预混合"的方法,得到硬脂酸/石墨烯母料。通过机械共混法制备天然橡胶(NR)/改性石墨烯(GNs)与丁腈橡胶(NBR)/GNs复合材料。通过分析复合材料的导热性能、热管理性能和压缩生热性能的变化情况,验证石墨烯的性能与硬脂酸/石墨烯"预混合"对石墨烯分散的影响。结果表明,添加3份GNs时,NRC-3、NBRC-3的导热性能分别提升了108%和194%,压缩温升降低了8. 9℃和9. 9℃。该方法制备的石墨烯导热性能优秀,硬脂酸/石墨烯的"预混合"有效改善了石墨烯在聚合物中的分散性。The graphene was prepared by ultrasound-assisted in supercritical CO2/H2 O medium and modified by 3-aminopropyl triethoxy silane( APTES),then the stearic acid/graphene masterbatch was obtained by the pre-mixing method. Natural rubber( NR)/modified graphene composites( GNs) and nitrile rubber( NBR)/GNs composites were prepared by mechanical blending method. The properties of graphene and the effect of premixing of stearic acid/graphene on graphene dispersion were verified by analyzing thermal conductivities,thermal management properties and compression heat of the composites. The results showthat the thermal conductivities of NRC-3 and NBRC-3 has increased 108% and 194%,respectively. And the compression temperature decreases 8. 9 ℃ and 9. 9 ℃ .The graphene prepared by the method obtains excellent thermal properties. The premixing of stearic acid/graphene effectively improves the dispersion of graphene in the polymer.

关 键 词：改性石墨烯 天然橡胶 丁腈橡胶 预混合 导热系数 压缩生热 复合材料 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]