石墨烯电压稳定剂对聚乙烯共混物介电性能的影响  

Effect of Graphene Voltage Stabilizer on Dielectric Properties of Polyethylene Blends

作　　者：蒋琛 戴超 江铁 陈向荣 周浩[2] JIANG Chen;DAI Chao;JIANG Tie;CHEN Xiangrong;ZHOU Hao(State Grid Hangzhou Power Supply Company,Hangzhou 310009,China;Zhejiang Provincial Key Laboratory of Electrical Machine Systems(Zhejiang University),Hangzhou 310027,China)

机构地区：[1]国网浙江省电力有限公司杭州供电公司,杭州310009 [2]浙江省电机系统智能控制与变流技术重点实验室(浙江大学),杭州310027

出　　处：《浙江电力》2019年第11期72-77,共6页Zhejiang Electric Power

基　　金：国家重点研发计划资助项目（2018YFB0904400）;中央高校基本科研业务费项目（2018QNA4017）;浙江省自然科学基金项目（LY18E070003）;浙江大学“百人计划”项目（自然科学A类）;宁波市“科技创新202”重大专项

摘　　要：研究了石墨烯作为电压稳定剂对聚乙烯共混物介电性能的影响。石墨烯/聚乙烯共混物通过溶液法进行制备,其物化性能采用热重分析、差示扫描量热法进行表征分析,其介电性能主要利用基于三电极的直流电导率测试系统以及介电谱测量系统进行实验研究。实验结果表明:聚乙烯共混物添加石墨烯后在热稳定性增强的同时,其结晶性能也有所提升;石墨烯/聚乙烯共混物的直流电导率随温度的升高而增大,石墨烯使低/高密度聚乙烯共混物的导电性明显降低,石墨烯/聚乙烯共混物的介质损耗与石墨烯分散均匀程度密切相关。This paper presents investigations on the effect of graphene on dielectric properties of polyethene blends. The graphene/polyethene blends are prepared by solution method, and their physical and chemical properties are characterized by TGA and DSC, and the electrical properties of graphene/polyethene blends are measured by the DC conductivity test system based on three electrodes and dielectric spectrum measurement system respectively. The experimental results show that the blends with graphene can improve thermal stability and crystallization properties;DC conductivity of graphene/polyethene blends increases with the temperature rise. Graphene reduces the electrical conductivity of LDPE/HDPE significantly. The dielectric loss of graphene/polyethene blends is closely related to the uniformity of graphene dispersion.

关 键 词：石墨烯 聚乙烯 热性能 直流电导率 介电性能 

分 类 号：TM21[一般工业技术—材料科学与工程]