868环氧树脂/石墨烯复合导电聚合物的NTC效应研究  

Research on the NTC effect of 868 epoxy resin/graphene composite conductive polymer

作　　者：安长胜 欧齐翔 张昭[4] 高志明[1] 刘严强 AN Changsheng;OU Qixiang;ZHANG Zhao;GAO Zhiming;LIU Yanqiang(School of Materials Science and Engineering,Tianjin University,Tianjin300350,China;School of Materials and Environmental Engineering,Changsha University,Changsha410022,China;Zhejiang YUXI Corrosion Control Corporation,Ningbo315725,Zhejiang Province,China;Department of Chemistry,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]天津大学材料科学与工程学院,天津300350 [2]长沙学院材料与环境工程学院,湖南长沙410022 [3]浙江钰烯腐蚀控制股份有限公司,浙江宁波315725 [4]浙江大学化学系,浙江杭州310058

出　　处：《电子元件与材料》2024年第8期908-912,共5页Electronic Components And Materials

基　　金：国家自然科学基金青年科学基金(52204307)。

摘　　要：为了开发高性能聚合物基NTC热敏电阻,将石墨烯均匀地分散在868环氧树脂聚合物基体中并固化成型,制备得到一种具有负温度系数(Negative Temperature Coefficient,NTC)的环氧树脂/石墨烯复合材料,研究了石墨烯含量、固化工艺对复合材料体积电阻率及NTC强度的影响,并考察了复合材料的稳定性和附着力。结果表明,石墨烯质量分数为5%的样品,当固化温度为40℃,时间为9 h时,在50℃测试条件下,其体积电阻率为9.32×10^(6)Ω·cm,当测试温度升高到100℃,体积电阻率下降为4.35×10^(3)Ω·cm;同时,NTC强度最高可达到3.33,并且其在PET膜上表现出优异的附着力;经过3次重复加热测试后石墨烯在基体内部发生轻微的不可逆变化,初始体积电阻率有所降低,后续导电结构趋于稳定,并表现出优异的循环稳定性。本研究为聚合物基NTC热敏电阻的研究提供一定理论基础,有助于推动其在电子、通信、新型储能等行业的应用。An epoxy resin/graphene composite with negative temperature coefficient(NTC)was prepared by uniformly dispersing graphene nanosheets into an 868 epoxy resin polymer matrix to devolop high-performance polymer-based NTC thermistor.The effects of conductive fillers and curing process on the volume resistivity and NTC strength of the conductive polymer were investigated,and the stability and adhesion of the composite were tested.The composite with a graphene content of 5%presents a volume resistivity of 9.32×10^(6)Ω·cm when cured at 40℃for 9 hours under 50℃testing conditions.When the testing temperature increases to 100℃,the volume resistivity decreases to 4.35×10^(3)Ω·cm.Meanwhile,the NTC strength can reach up to 3.33,and it shows excellent adhesion on PET film.After three repeated heating tests,the conductive filler underwent slight irreversible changes within the matrix,with a decrease in initial volume resistivity.The subsequent conductive structure tends to stabilize and exhibits excellent cyclic stability.This study provides a theoretical basis for the research of polymer-based NTC thermistors,which will help promote their application in electronics,communications,new energy storage and other industries.

关 键 词：868环氧树脂 石墨烯 导电聚合物 NTC效应 

分 类 号：TN371[电子电信—物理电子学]