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Poly(vinyl alcohol)-assisted dispersion of polyaniline nanofiber for electrochemical applications

Published online by Cambridge University Press:  23 November 2011

Chi-Chang Hung
Affiliation:
Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
Chen-Hao Wu
Affiliation:
Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
Chien-Hsin Yang
Affiliation:
Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 81148, Taiwan
Yen Wei
Affiliation:
Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan; and Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
Ten-Chin Wen*
Affiliation:
Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
*
a)Address all correspondence to this author. e-mail: tcwen@mail.ncku.edu.tw
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Abstract

Polyaniline nanofiber (PANF) was synthesized using interfacial polymerization and was mixed with aqueous solution of poly(vinyl alcohol) (PVA) to form PANF–PVA binaries. The PANF suspension in water could be stabilized by PVA for more than 3 months due to the hydrogen bonding interaction between PANF and PVA. The specific characteristics of PANF–PVA films was checked by scanning electron microscopy, conductivity measurement, thermogravimetric analysis, Fourier transform infrared spectroscopy, and cyclic voltammetry. The composite film contained 25 wt% PVA (PANF–PVA25) casting at 105 °C was found to have a porous structure and good conductivity. The presence of hydrogen bonding interaction between PANF and PVA improves the electroactivity and electroactive stability of PANF–PVA25 for electrochemical applications. However, an ether linkage between PANF and PVA polymer chain was also found as casting the PANF–PVA film at 200 °C, which is unfavorable for electrochemical applications.

Type
Articles
Copyright
Copyright © Materials Research Society 2011

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