PEDOT复合导电浆料的制备及性能研究

Preparation and performance of PEDOT composite conductive paste

3,4-乙烯二氧噻吩(EDOT)和对苯乙烯磺酸钠(SSNa)在过硫酸钾(KPS)—硫酸铁[Fe SO2 4 3x H O]作用下,通过化学氧化法合成了聚3,4-乙烯二氧噻吩/聚对苯乙烯磺酸钠(PEDOT/PSS)导电聚合物浆料,并通过2步法——乳液聚合法和化学氧化法合成了聚(对苯乙烯磺酸钠-丙烯酸丁酯-苯乙烯)P(SSNa-BA-St)三元共聚乳液和PEDOT/P(SSNa-BA-St)复合导电浆料,探讨了SSNa用量、EDOT用量和球磨机分散对复合导电浆料性能的影响,同时对2种导电膜进行了柔韧性测试。结果表明,随着SSNa用量的增大,复合导电膜的表面电阻先增大后减小;与之相反随着EDOT用量的增大,该膜的表面电阻先减小后增大;球磨分散有助于提高复合导电膜的透光率,但会导致膜的表面电阻增大;与PEDOT/PSS膜相比,PEDOT/P(SSNa-BA-St)膜的柔韧性较好。

The poly（3,4-ethylenedioxythiophene）/poly（sodium-p-styrenesulfonate）（PEDOT/PSS） conductive paste was synthesized by chemical oxidation,in which 3,4-ethylenedioxythiophene（EDOT） and sodium p-styrene sulfonate（SSNa） as the reactants and potassium persulfate（KPS） and ferric sulfate as the initiators. The poly（sodium p-styrene sulfonate-butyl acrylate-styrene）[P（SSNa-BA-St）]ternary copolymer emulsion and the PEDOT/P（SSNa-BA-St） composite conductive paste were synthesized by emulsion polymerization and chemical oxidation, respectively. The effects of ball milling dispersion and amounts of SSNa and EDOT on the performance of composite conductive paste were discussed. And the flexilities of two kinds of conductive films were compared. Results showed that the surface resistance of composite conductive films first increased and then decreased with increasing the SSNa amount;on the contray,the surface resistance of the films first decreased and then increased with increasing the EDOT amount. Ball milling dispersion was helpful to improve the light transmittance of composite conductive films, but can cause the surface resistance of the films increased. By comparison, the flexility of PEDOT/P（SSNa-BA-St） film was better than that of PEDOT/PSS film.