The study of electrochemical synthesis, properties and composite mechanism of PANI/PVA and PANI/PVA/Ag composite films

聚苯胺 材料科学 复合数 聚乙烯醇 导电聚合物 循环伏安法 电导率 复合材料 扫描电子显微镜 化学工程 电化学 聚合物 化学 电极 聚合 工程类 物理化学
作者
Shu-hao Deng,Yu Wang,Xi Yang
出处
期刊:Pigment & Resin Technology [Emerald Publishing Limited]
卷期号:47 (2): 133-141 被引量:6
标识
DOI:10.1108/prt-11-2016-0101
摘要

Purpose The purpose of this paper is to improve the conductivity and processability of polyaniline (PANI). Design/methodology/approach The study opted for synthesis of the conductive PANI/polyvinyl alcohol (PVA) composite film, co-doped with 5-sulphosalicylic acid and sulphuric acid. Using an electrochemical method, a small amount of silver (Ag) was electrodeposited on the film. The PVA/PANI and PVA/PANI/Ag composite films were characterised by scanning electron microscope, X-ray diffraction and infrared. The composite deposition mechanism of the composite film was investigated by cyclic voltammetry for the first time. Findings The conductivity of the optimum PVA/PANI composite film reached 21.2 S · cm −1 .Then, a small amount of Ag was deposited on the PVA/PANI film, and the conductivity significantly increased by 1250 S · cm −1 . Through appropriate degree of stretching, the conductivity of the films was enhanced. The results indicate that uniform PVA/PANI fibres and dendritic Ag can combine to form complete three-dimensional conductive networks that exhibit better conductivity and mechanical properties. The cyclic voltammetry curves reveal that the dedoping potential of PANI was more negative than the reduction potential of Ag. Therefore, the procedure for the deposition of Ag on the PANI/PVA composite film cannot decrease the conductivity. Practical implications This paper for the first time described and revealed the effective and practical synthesis approach and composite mechanism to prepare multi-types metal-conductive polymer composites and improve the conductivity of a conductive polymer with a less expense and one-step electrochemical method. Originality/value This paper first explored galvanostatic oxidation to synthesise a PANI composite film to resolve the processability and conductivity of PANI by co-doped with mixed acids and deposited Ag on film. Furthermore, for the first time, the composite mechanism of metal and conductive polymer was studied.
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