Conductive properties and mechanism of various polymers doped with carbon nanotube/polyaniline hybrid nanoparticles

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• 作者：Hong-xin Tan ; Xue-cheng Xu ; ^{xcxu@phy.ecnu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Multi-walled carbon nanotubes ; Polyaniline ; Percolation threshold ; Composites
• 刊名：Composites Science and Technology
• 出版年：2016
• 出版时间：18 May 2016
• 年：2016
• 卷：128
• 期：Complete
• 页码：155-160
• 全文大小：1563 K

文摘

Presented here is a novel approach to polymer composite fabrication, achieved under low electrical percolation threshold. Multiwall carbon nanotubes (MWNT)/polyaniline (PANI) hybrid nanoparticles with high electrical conductivity have been readily prepared by in-situ polymerization at 5 wt% MWNT. Three matrices, polyvinyl chloride (PVC), poly (methyl methacrylate) (PMMA) and polystyrene (PS), were mechanically blended with MWNT/PANI nanoparticles and percolated at respective weight percentages of 0.25, 0.85 and 1.25. As evidenced by X-ray photoelectron spectroscopy, the π-π interaction between MWNT and PANI supports enhances carrier mobility, which leads to high electrical conductivity of MWNT/PANI nanoparticles at low MWNT content. FESEM and Hall Effect Measurement System analyses show strong doping effect between nanoparticles and matrices, which provides excellent dispersion of MWNT/PANI nanoparticle in the matrix. Better charge transition is obtained for MWNT/PANI/polymer composites by replacing the insulating polymer with the conductive and less-resistant PANI polymer. The same change is also responsible for the hybrid nanoparticle's low electrical percolation.