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采用可溶性导电聚苯胺功能化多壁碳纳米管(PANI-MWNTs)与环氧树脂(Epoxy)溶液共混制备了PANIMWNTs/Epoxy复合材料。当PANI-MWNTs溶解分散于Epoxy溶液中时,包覆在MWNTs表面的PANI分子链溶解和溶胀把MWNTs隔开,使MWNTs均匀分散在Epoxy中。MWNTs良好地分散及MWNTs与Epoxy间的界面粘结作用,阻碍Epoxy大分子链段的运动和热分解在复合材料中的传播,复合材料的玻璃化转变温度和热稳定性显著提高。PANI-MWNTs的引入使复合材料电导率上升,当其含量为1.25wt%时,复合材料的室温电导率为9.35×10-6 S·cm-1比Epoxy提高7个数量级。
PANIMWNTs / Epoxy composites were prepared by blending PANI-MWNTs with epoxy resin (Epoxy). When PANI-MWNTs were dissolved in Epoxy solution, PANI chains coated on the surface of MWNTs dissolved and swollen, which separated the MWNTs and dispersed MWNTs in Epoxy. MWNTs dispersed well and the interfacial bonding between MWNTs and Epoxy hindered the movement of Epoxy macromolecule segments and the thermal decomposition in the composites. The glass transition temperature and thermal stability of the composites were significantly improved. The conductivity of the composites increased with the addition of PANI-MWNTs. When the content of PANI-MWNTs was 1.25wt%, the room temperature conductivity of the composites was 9.35 × 10-6 S · cm-1, which was seven orders of magnitude higher than that of Epoxy.