导电聚苯胺二次掺杂制备方法及性能研究

Synthesis of secondary doping of the conductive composites of polyaniline and its properties

利用化学氧化合成原理,以氨基磺酸(SA)为一次掺杂剂,盐酸为二次掺杂剂,制备了二次掺杂的导电聚苯胺,分别考察了不同掺杂剂量、氧化剂量及掺杂反应时间等因素对聚苯胺电导率的影响。实验结果表明,当n(An)∶n(SA)∶n(APS)=1∶5∶0.4,盐酸为1mol/L,一次掺杂反应时间为3.5h时,所得产物电导率较高且可达3.18S/cm。结果表明,二次掺杂工艺得到的产物具有较好的导电性能,并节约SA用量约40%,是一种绿色、新颖的制备方法。

In this paper,the preparation of PANI was investigated.PANI doped with NH2 SO3 H and redoped with HCl was synthesized.The effect of content of acid and oxidant,doping spacing interval on product’s con-ductivity were discussed.And four probe conductivity apparatus was used to analyze the electric properties of product.The results show that in redoping process,the conductivity of PANI was 3.1746 S/cm when the con-tent of HCl was 1.0 mol/L,molar ratio of n（An）∶n（SA）∶n（APS）was 1∶5∶0.4,doping spacing interval 3.5 h,the conductive stability was good.Compared with traditional doping method,the amount of SA could re-duce about 40% and conductive stability was better.