碳纳米管/聚苯乙炔复合材料的导电性  

Electrical property of carbon nanotubes/polyphenylacetylene composites

作　　者：李相美[1] 徐学诚[1] 余维[2] 顾英俊[2] 石岩[1] 成荣明[1] 陈奕卫[1] 

机构地区：[1]华东师范大学纳米功能材料与器件应用研究中心,上海200062 [2]华东理工大学物理系

出　　处：《复合材料学报》2006年第5期70-74,共5页Acta Materiae Compositae Sinica

基　　金：上海市纳米科技专项基金资助项目(0252nm011)

摘　　要：用AlCl3作催化剂制备了聚苯乙炔(PPA),用浓H2SO4进行磺化改性,通过共混制得碳纳米管(CNT)/PPA及磺化CNT/PPA复合材料,进行导电性能、XRD等测试。当CNT含量增加时,复合材料的电导率升高,磺化CNT/PPA的导电阈值比CNT/PPA的导电阀值降低了1%,前者达到极限电导率所需CNT的量是后者的10%;分析了随着温度变化影响复合材料电阻变化的因素;XRD测试表明,在CNT界面上的磺化PPA有新的晶型产生。Polyphenylacetylene （PPA） was prepared with anhydrous AICl3 as catalyst, and sulfonated by concentrated H2SO4. The conductivities were studied for carbon nanotubes （CNT）/PPA and sulfonated CNT/PPA composite, which were prepared by mixing CNT with polymer in tetrahydrofuran under sonication. The room temperature conductivity of the two kinds of composites increases with increasing the ratio of CNT. The estimated percolation threshold of sulfonated CNT/PPA is 1% less than that of CNT/PPA and the amount of CNT added to PPA for obtaining the maximum conductivity is 10% of that of the sulfonated PPA. And the factors that affect the conductivity of the composites were analyzed when the temperature changes. The XRD shows that the sulfonated PPA has created a new crystal structure on the interface of CNT.

关 键 词：碳纳米管(CNT) 聚苯乙炔(PPA) 电导率 XRD 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]