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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Study on Preparation of Conducting Polyaniline/Polyurethane Foam and Its Use in Silver Ion Recovery
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 825-829)
Author(s): Fen Chen, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
Chun-ming Yang, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
Abstract: Conducting polyaniline/polyurethane foam composite was prepared by in-situ chemical oxidative polymerization of polyaniline (PAn) on the carrier of polyurethane foam (PUF). The influence of aniline monomer concentration, the molar ratio of monomer to oxidant, the kind and its concentrations of medium acid on the volume electrical resistivity was investigated. The application of the resulting composite was studied in the recovery of silver ion. SEM and FT-IR spectroscopy were employed to characterize the morphological changes and molecular structure of polyurethane foam after coated with polyaniline and subsequently used for silver ion recovery. The volume resistivity and thermal stability of the composites were also measured. The experimental results show that the volume resistivity of the conducting polyurethane foam can be controlled in the range of 104~108 Ω·cm by changing the in-situ growth conditions of polyaniline on PUF. The reduction reaction of Ag+ by as-prepared PAn/PUF composite is in accordance with first-order reaction and its mean activation energy is 30.22 kJ·mol-1. And the silver recovery in this process amounts to 99.0%.
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