网络化聚吡咯/聚氨酯复合材料的抗静电性能研究  

Study on antistatic properties of networked polypyrrole/polyurethane composites

作　　者：段书谦 刘姝雅 刘江慧 成晓琼 蒙丹 张先群 陈肖 付海[1,2] DUAN Shuqian;LIU Shuya;LIU Jianghui;CHENG Xiaoqiong;MENG Dan;ZHANG Xianqun;CHEN Xiao;FU Hai(School of Materials and Construction Engineering,Guizhou Normal University,Guiyang 550025,China;Lightweight materials Engineering Research Center of Department of Education of Guizhou,Guiyang 550025,China)

机构地区：[1]贵州师范大学材料与建筑工程学院,贵阳550025 [2]贵州省教育厅轻质材料工程研究中心,贵阳550025

出　　处：《中国塑料》2024年第2期33-38,共6页China Plastics

基　　金：贵州省高等学校轻质材料工程研究中心(黔教技[2022]045号)。

摘　　要：导电剂填充树脂制备高分子抗静电复合材料时,其添加量直接决定着复合材料的导电率,但导电剂的微观形态深刻影响着导电通道的效能。利用软模板制备不同网络结构特征的聚吡咯(PPy)材料,将其与聚氨酯(PU)通过溶液共混制备PPy/PU复合材料,考察PPy的结构差异对复合材料电导率的影响。利用线径在20~35 nm和30~50 nm范围的网络化PPy材料,分析了其添加量为1%~3%(质量分数,下同)时所制备的PPy/PU复合材料的电导率,对比PPy颗粒制得复合材料电导率均达到了10^(-7) S/m数量级。复合材料在100%~500%形变下,导电率均出现降低,但网络化PPy/PU复合材料仅下降1个数量级,其中1%添加量的网络化PPy/PU复合材料与3%PPy颗粒制备PU复合材料的导电率相当。结果表明,网络化导电剂在复合材料形变条件下,其原生网络维持了复合材料中导电通道的完整性,使得材料在形变下依然保持较高的电导率。In the preparation of polymer antistatic composites using conductive fillers,the addition amount of a conductive filler directly determines the conductivity of the resulting composites;however,the microscopic morphology of the con-ductive filler inventively affects the efficacy of the conductive channel.Polypyrrole(PPy)materials with different net-work structural features were prepared by using a soft template,and the PPy/polyurethane(PU)composites were pre-pared through solution blending.The effect of structural difference in PPy on the electrical conductivity of the composites was investigated.The electrical conductivity of PPy/PU composites at a PPY addition amount of 1 wt%~3 wt%was analyzed by using networked PPy materials with a line diameter in the ranges of 20~35 nm and 30~50 nm,and their electrical conductivities reached were an order of 10^(-7) S/m compaed to the PPy particles.The composites all showed a decrease in electrical conductivity under 100%~500%deformation.However,the electrical conductivity of the net-worked PPy/PU composites only decreased by one order of magnitude,and the electrical conductivies of the composites containing 1 wt%and 3 wt%PPy particles were identical.The results indicated that the native network of the networked conductive filler could maintain the integrity of conductive channels in the composites under deformation of the compos-ites.This allows the materials to maintain a high conductivity under deformation.

关 键 词：网络化聚吡咯 抗静电复合材料 形变条件 导电性能 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]