Electrically conductive hydrogel composites made of polyaniline nanoparticles and poly(N-vinyl-2-pyrrolidone)

被引：140

作者：

Dispenza, C

Lo Presti, C

Belfiore, C

Spadaro, G

Piazza, S

机构：

[1] Univ Palermo, Dipartimento Ingn Chim Proc & Mat, I-90128 Palermo, Italy

[2] Univ Palermo, Ctr Interdipartimentale Ric Mat Compositi, I-90128 Palermo, Italy

来源：

POLYMER | 2006年 / 47卷 / 04期

关键词：

polyaniline; hydrogel composites; conductivity;

D O I：

10.1016/j.polymer.2005.12.071

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A novel electrically conductive composite material, consisting of polyaniline. (PANT) nanoparticles dispersed in a polyvinyl pyrrolidone (PVP) hydrogel, was prepared 'in situ' by water dispersion polymerisation (1)P) of aniline using PVP as steric stabiliser, followed by gamma-irradiation induced crosslinking of the PVP component. Conversion yield of aniline into PANT particles was determined via HPLC and gas chromatography, while structural confirmation of the synthesised polymer was sought by FTIR. Morphology and dimensions of PANT particles into the coloured, optically transparent hydrogel was determined by electronic microscopy; moreover. swelling behaviour of composite hydrogels in different buffer solutions was investigated by gravimetric measurements and compared to that of pure PVP hydrogels. Cyclic voltammetry experiments were carried out both on these hydrogels and on the parent aqueous dispersions, at different pH values of the suspending/swelling medium, while conductivity of the composite hydrogels was derived from Impedance Spectroscopy; in both cases results were compared to those relative to hydrogels containing commercial-grade PANT particles. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：961 / 971

页数：11

共 51 条

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