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在十二烷基苯磺酸钠(SDBS)乳液中,用漆酶催化合成水溶性导电聚苯胺(PANI)。探讨了反应体系的温度、pH值、苯胺浓度以及酶浓度对聚合反应的影响。通过UV-vis-near-IR,FT-IR和四探针法对产物进行表征,利用核磁共振1 H-NMR谱图分析了产物中SDBS的掺杂率。结果表明:在SDBS乳液中,漆酶催化水溶性导电聚苯胺合成的最适pH值为3.6、苯胺浓度为20mmol·L-1、漆酶加入量为150U·mL-1时,获得的聚合产物掺杂率高达0.47且产率为80.2%,其电导率为5.56×10-5S·cm-1,与其他乳化剂掺杂的本征态聚苯胺相比,掺杂率和电导率均有明显提高。
Laccase was used to catalyze the synthesis of water-soluble conductive polyaniline (PANI) in sodium dodecylbenzenesulfonate (SDBS) emulsion. The effects of reaction temperature, pH value, aniline concentration and enzyme concentration on the polymerization reaction were discussed. The products were characterized by UV-vis-near-IR, FT-IR and the four-probe method. The doping rate of SDBS in the product was analyzed by 1 H-NMR spectroscopy. The results showed that in the SDBS emulsion laccase catalyzed synthesis of water-soluble conductive polyaniline optimum pH value of 3.6, aniline concentration of 20mmol·L-1, laccase dosage of 150U · mL-1, the polymerization product obtained The doping rate is up to 0.47 and the yield is 80.2%. The conductivity is 5.56 × 10-5S · cm-1. Compared with other emulsifier-doped intrinsic polyaniline, the doping rate and conductivity are obvious improve.