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采用溶液再掺杂法制备了DBSA二次掺杂态煤基聚苯胺(CBP-R-DBSA),得出较佳的二次掺杂条件:时间24 h,温度30℃,酸浓度1.2 mol/L,所得产物电导率为6.08×10-2 S/cm。分析探讨了煤基聚苯胺的掺杂-脱掺杂过程及不同态煤基聚苯胺的结构与性能,结果表明:原位聚合引入的外加酸与煤大分子酸对聚苯胺具有协同掺杂效应,煤基聚苯胺的掺杂-脱掺杂不完全可逆,煤表面酸性基团的掺杂作用相应减少了聚苯胺链上的掺杂活性点,这限定了DBSA对U-CBP的有效二次掺杂,其掺杂效果逊于乳液聚合原位掺杂。
DBSA secondary-doped coal-based polyaniline (CBP-R-DBSA) was prepared by solution doping method. The optimum secondary doping conditions were obtained: time 24 h, temperature 30 ℃, acid concentration 1.2 mol / L, the conductivity of the product was 6.08 × 10-2 S / cm. The process of doping and dedoping of coal-based polyaniline and the structure and properties of coal polyaniline with different states were analyzed. The results show that the addition of acid and coal macromolecule acid introduced by in situ polymerization have a synergistic doping effect on polyaniline , The doping-dedoping of coal-based polyaniline is not completely reversible, and the doping effect of acid groups on the coal surface correspondingly reduces the doping activity points on the polyaniline chain, which limits the effective secondary DBSA to U-CBP Doping, its doping effect is inferior to the in situ doping of emulsion polymerization.