采用简单的阳离子表面活性剂诱导原位聚合方法制备了具有针状结构的聚苯胺(PANI)包覆多壁碳纳米管(MWCNTS)的分级结构材料.分别采用红外光谱(FT-IR)、紫外可见(UV-Vis)、扫描电镜(SEM)、透射电镜(TEM)、热重(TG)、气敏测试等分析测试手段对PANI/MWCNT的绀成、形貌、微观结构、热稳定性和气敏性能进行了表征和测试.结果表明,在MWCNTS上均匀包覆了约20nm厚的针状PANI,该材料制备的气敏元件在室温下对NH3的灵敏度,重复性明显好于纯PANI,灵敏度也高于非针状PANI包覆的PANI/MWCNT.
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