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选择十六烷基三甲基溴化铵(CTAB)对碳纳米管进行表面处理,提高了碳纳米管在苯胺溶液中的分散性。在苯胺的盐酸溶液中,以过硫酸铵为氧化剂,磺基水杨酸为掺杂剂,采用化学氧化法制备了聚苯胺/碳纳米管复合材料。用四探针测试仪对产物的电导率进行了测试,结果表明,复合材料的电导率随碳纳米管加入量的增加而增大,当n(碳纳米管)/n(苯胺)=2时,复合材料的电导率为4.613S/cm,是纯苯胺电导率的2.44倍。用扫描电镜(SEM)、透射电镜(TEM)对产物的微观形貌进行了表征,结果表明,聚苯胺包覆在碳纳米管的表面,包覆层的厚度为60～90nm。用紫外光谱(UV-vis)和傅立叶变换红外光谱(FTIR)对产物的结构进行了表征,结果表明,聚苯胺与碳纳米管之间存在较强的相互作用。
CTAB was chosen as the surface treatment of carbon nanotubes to improve the dispersibility of carbon nanotubes in aniline solution. In aniline hydrochloride solution, ammonium persulfate as oxidant and sulfosalicylic acid as dopant, polyaniline / carbon nanotube composites were prepared by chemical oxidation. The conductivity of the product was tested by a four-probe tester. The results show that the conductivity of the composite increases with the increase of the amount of carbon nanotubes. When n (carbon nanotubes) / n (aniline) = 2 , The conductivity of the composite material is 4.613S / cm, 2.44 times that of pure aniline. The morphology of the product was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that polyaniline was coated on the surface of carbon nanotubes and the thickness of the coating was 60 ~ 90nm. The structure of the product was characterized by UV-vis and Fourier transform infrared spectroscopy (FTIR). The results show that there is a strong interaction between polyaniline and carbon nanotubes.