摘要
以聚吡咯(PPy)为基体,FeCl_3作为氧化剂,十二烷基苯磺酸钠(DBSNa)作为掺杂剂,表面镀有金属镍(Ni)膜的纳米石墨微片(NanoG)作为二维层状纳米填料,通过原位聚合法制备了PPy/Ni/NanoG导电复合材料,并对其结构和导电性能进行了表征。结果表明,PPy与Ni/NanoG的相容性较好,PPy聚合物均匀地包覆在Ni/NanoG片层表面和边缘;Ni/NanoG的二维受限空间的阻隔作用能够有效抑制PPy分子链的卷曲和交联,使PPy分子链共轭程度提高,π电子的离域性增加;循环伏安测试表明复合材料的峰面积大,峰电流高,导电能力强;复合材料的导电性能随Ni/NanoG含量的增加由8.2 S/cm提高到103.6 S/cm,Ni/NanoG的阈值为2%(质量分数,下同)。
Polypyrrole/Ni/graphite nanosheet （ PPy/Ni/NanoG ） was prepared via in-situ polymerization,using polypyrrole （PPy） as a matrix, FeCla as an oxidant, sodium dodecyl benzene sulfonate （DBSNa） as a doping agent, nickle coated graphite nanosheets （Ni/NanoG） as a two- dimensional nano-filler. Microstructure and electrical performance of the composites were characterized. It was found that the surfaces and edges of Ni/Nan0G sheet were coated by PPy particles, the curling and cross-linking of PPy molecular chain could be effectively suppressed by the barrier effect of Ni/NanoG, and the conductivity of the composites was improved by the enhanced conjugation of PPy molecules and increased π electron delocalization. Comparison of cyclic voltammetry between PPy and PPy/Ni/NanoG composites indicated that the conducting property of the composites was higher than that of polymers. The conductivity increased from 8. 2 to 103. 6 S/cm as Ni/NanoG content reaching 2 wt%.
出处
《中国塑料》
CAS
CSCD
北大核心
2016年第3期28-32,共5页
China Plastics
基金
陕西省自然科学基金项目(2014JQ6225、2015JM2074)
陕西省教育厅自然科学基金项目(2013JK0699)
关键词
聚吡咯
石墨微片
原位聚合
电导率
polypyrrole
graphite nanosheets
in-situ polymerization
conductivity
