新型石墨烯/硅橡胶纳米复合电介质泡沫材料的制备及介电性能评价  

Preparation of New Graphene/Silicone Rubber Nanocomposite Dielectric Foams and Dielectric Properties Evaluation

作　　者：刘聪[1] 肖藤 邓佳明 刘海东[1] 李谦 阿拉木斯 LIU Cong;XIAO Teng;DENG Jia-ming;LIU Hai-dong;LI Qian;ALAMUSI(School of Manufacturing Science and Engineering,Key Laboratory of Testing Technology for Manufacturing Process,Mianyang 621010,China;China Bluestar Chengrand Co.,Ltd.,Chengdu 610041,China;School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]西南科技大学制造过程测试技术教育部重点实验室,四川绵阳621010 [2]中蓝晨光化工研究设计院有限公司,四川成都610041 [3]河北工业大学机械工程学院,天津300401

出　　处：《塑料工业》2020年第8期145-150,共6页China Plastics Industry

基　　金：四川省重大科技成果转化示范项目(2018CC00224)。

摘　　要：通过室温硫化(RTV)法制备了不同泡孔直径的石墨烯/有机硅橡胶泡沫复合材料。提出了一种制备不同发泡倍数的双组分室温硫化加成型有机硅橡胶泡沫复合材料的工艺;讨论了石墨烯含量、发泡倍数、泡孔的数目和尺寸对室温硫化硅橡胶泡沫介电性能的影响。结果表明,在同一发泡倍数下,介电常数随石墨烯的添加量增加而增加,达到阈值后降低;在同一石墨烯添加量下,泡孔尺寸和泡孔数目有着不同贡献:直径、泡孔数目较少时,介电常数降低,泡孔的总数和大孔的占比较多时,介电性能最佳。此外含有石墨烯的有机硅橡胶泡沫复合材料较纯硅橡胶泡沫而言,其介电常数提升了6倍左右,同时保持着较低的介电损耗。Graphene/silicone rubber foam composites with different cell sizes were prepared by room temperature vulcanization(RTV)method.A two-component process of room temperature vulcanization molding silicone rubber foam composites with different foaming ratios was proposed.The influence of the graphene contents,expansion ratio and the number and size of cells on the dielectric properties of RTV silicone rubber foam was discussed.The results show that with the same expansion ratio,the dielectric constant could increase with the increasing of graphene contents.And it could decrease,when the threshold is achieved.When the amounts of graphene are the same,the cell size and cell number has different contributions.When the diameter and the number of bubbles are small,the dielectric constant decreases.When the total number of cells and the number of cell size are large,the dielectric performance is the best.In addition,the dielectric constant of the rubber foam composites prepared by graphene increases about six times comparing with the pure silicone rubber foam and keeps low dielectric loss.

关 键 词：硅橡胶 石墨烯 发泡倍数 介电性能 泡孔结构 电介质材料 

分 类 号：TB324[一般工业技术—材料科学与工程] TQ328.1[化学工程—合成树脂塑料工业]