A stable iodine-doped multi-walled carbon nanotube-polypyrrole composite with improved electrical property

作者：Fan, Li na; Xu, Xue cheng^*

来源：Composites Science and Technology, 2015, 118: 264-268.

DOI：10.1016/j.compscitech.2015.09.014

• Iodine doped
• Carbon nanotubes
• Polymer-matrix composites (PMCs)
• Nano composites
• Electrical properties

A highly conductive carbon nanotubes-polymer composite is fabricated by iodine doping. Interestingly, the conductivity of both multi-walled carbon nanotubes (MWCNTs) and polypyrrole (PPy) keeps unaffected by iodine, but the MWCNT-PPy composite shows similar to 3.4 times higher conductivity only with 5 wt% of iodine doped the composite. The electrical property is proved to be stable at room temperature. Hall Effect tests reveals the increasing carrier concentration and mobility of doped MWCNT-PPy lead to the high conductivity. According to Raman and XPS investigation, PPy and MWCNTs form an extended conjugated system through pi-pi interactions, which favors the p-pi interactions of iodine with MWCNT-PPy. As a result, a typical conductive carrier N+ in MWCNT-PPy composite raises significantly. Besides, the carrier mobility also increases due to the higher conjugate degree. Our results suggest that iodine doping is a useful way to improve the conductivity of as prepared CNTs-conjugated polymer products.

• 出版日期2015-10-30
• 单位华东师范大学