Papers by Author: Yang Yu

Abstract: Electroactive polyaniline fibres have been prepared by eletrodeposition in aniline and hydrochloric acid aqueous media. The influence of applied potential and polymerization time on the electrochemical polymerization of polyaniline fibres have been investigated. Morphology and structure of PANI were characterized by scanning electron microscopy. Electrochemical behaviors of PANI were studied by cyclic voltammetry. The results show that the applied potential and the polymerization time have a crucial influence on the polymerization rate and conductivity of the PANI prepared. It indicates that the properties, as well as the morphology of PANI, could be changed by applied potential and po-lymerization time, etc. This change might result in the quality of PANI suitable for specific applications.

Abstract: In this paper, polyaniline (PANI) fibres were prepared by electrochemical polymerization from the solutions of aniline and hydrochloric acid in the presence of different concentrations of aniline oligomer. The influences of adding a small amount of aniline oligomeric additives, such as p-aminodiphenylamine (PADPA), p-phenylenediamine (PPDA) to the electrochemical polymerization system of aniline on polyaniline fibres have been investigated. Change in fibre diameter with the concentration of aniline oligomer were investigated. Morphologies of PANI fibres were characterized by scanning electron microscopy (SEM). Electrochemical behaviors of PANI fibres were studied by cyclic voltammetry (CV). The results show that with the addition of PADPA, PPDA to aniline polymerization system, the rate of polymerization increases greatly, and more lower potentials can be applied to generate electroactive PANI fibres with more finer and uniform structure.