电化学合成吡咯与己内酰胺导电共聚物

采用恒电位方法实现了吡咯与己内酰胺在导电玻璃电极上的直接电化学共聚,聚合反应在含有0.1mol/L吡咯和1.5 mol/L己内酰胺的硝基甲烷电解质溶液中进行,外加电位控制在1.2 V以上.聚合产物中聚吡咯与聚己内酰胺链段的组成可通过调节合成电位加以控制.共聚物的形貌、结构与性质采用扫描电子显微镜、热重分析、红外光谱等手...

ELECTROCHEMICAL SYNTHESIS OF CONDUCTING COPOLYMER OF PYRROLE AND CAPPROLACTAM

The direct electrochemical copolymerization of pyrrole and caprolactam on an indium-tin oxide(ITO) electrode was carried out by potentiostatic methods.The polymerization reaction was controlled under the applied potential over 1.2 V versus Ag/AgCl(saturated KCl) electrode in the nitromethane solution containing 0.05 mol/L tetrabutyl ammonium tetrafluoroborate(Bu4NBF4),0.1 mol/L pyrrole and 1.5 mol/L caprolactam.The composition of polypyrrole and polycaprolactam chain in the obtained products can be adjusted by controlling the synthesis potential in the process of polymerization.Characterizations of the structure,morphology and thermal properties of the novel copolymer were based on scanning electron microscopy(SEM),thermal gravimetrical analysis(TGA) and Fourier transform infrared(FTIR) spectra studies.The results showed that the electrochemical oxidation of pyrrole and caprolactam comonomers generated true copolymers rather than blends of the two homopolymers.The copolymer of pyrrole and caprolactam showed a better flexibility than pure polypyrrole obtained under the same polymerization condition.A probable mechanism of the copolymerization of pyrrole and caprolactam was proposed.The existence of polycaprolactam matrix in copolymer was desired to improve the hydrophilic characteristic and the biocompatibility of the polymer film,and thus the copolymer film can be used as a good immobilization material for proteins in the construction of electrochemical biosensors.