聚丙烯腈改性碳纳米管复合材料的电性能  

Electrical conductivity properties of modified polyacrylonitrile/MWNTs composites

作　　者：张健[1] 徐学诚[1] 

机构地区：[1]华东师范大学物理系,上海200241

出　　处：《华东师范大学学报（自然科学版）》2012年第5期24-30,共7页Journal of East China Normal University(Natural Science)

基　　金：上海市纳米科技专项基金(0252NM011)

摘　　要：采用溶液聚合的方法制备聚丙烯腈,对聚丙烯腈进行热处理改性后,与碳纳米管共混制备复合材料.与未改性处理的复合材料相比,电导率提高了2个多数量级.用FTIR、Raman和XPS等方法进行研究,结果表明聚丙烯腈经热处理改性后,部分腈基(-C≡N)转变为亚胺基(-C=N),其链状结构向环状结构转化,MWNTs上的π电子与改性后聚丙烯腈的π电子之间形成强的π-π共轭,增强了改性聚丙烯腈与碳纳米管之间的相互作用,提高了复合材料的导电性能.The PAN was synthesised by solution polymerization, modified by heat-treatment and then blended with carbon nanotube to obtain the composites. The electrical conductivity of the composites increased by two orders of magnitude more than that unmodified. Fourier trans- form infrared spectroscopy （FTIR）, Raman spectra and X-ray spectroscopy （XPS） were used to characterize the composites. The results showed that some nitrile were changed into imino, and the chain-like structure also transformed to the cyclic structure after heat-treatment. The strong π-π system was formed between π-electrons of MWNTs and the modified PAN. The interaction between the modified polyacrylonitrile and carbon nanotubes was greatly enhanced. The electrical conductivity was highly improved.

关 键 词：多壁碳纳米管 聚丙烯腈 热处理改性 电性能 

分 类 号：O631.23[理学—高分子化学]