Simplifying the reaction system for the preparation of polyaniline nanofibers: Re-examination of template-free oxidative chemical polymerization of aniline in conventional low-pH acidic aqueous media

Autor(es)

Wang, Pen-Cheng ^{[1, 2]} ; Venancio, Everaldo C. ^{[3, 1]} ; Sarno, David M. ^{[1, 4]} ; MacDiarmid, Alan G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Penn, Dept Chem, Philadelphia, PA 19104 - USA

^[2] Natl Tsing Hua Univ, Dept Engn & Syst Sci, Hsinchu 30013 - Taiwan

^[3] Univ Fed Abc, CCNH, BR-09210170 Santo Andre, SP - Brazil

^[4] CUNY Queensborough Community Coll, Dept Chem, Bayside, NY 11364 - USA

• Tipo de documento: Artigo Científico
• Fonte: REACTIVE & FUNCTIONAL POLYMERS; v. 69, n. 4, p. 217-223, 2009.
• Citações Web of Science: 28

Resumo

In this study, several polyaniline samples were prepared by oxidative chemical polymerization using only aniline, (NH(4))(2)S(2)O(8) and HCl in aqueous media at room temperature for morphological studies by SEM (scanning electron microscopy). The results show that polyaniline nanofibers can be obtained by template-free oxidative chemical polymerization in a conventional low-pH acidic aqueous medium (pH similar to 0) at room temperature. The study indicates that it is crucial to employ a mild post-polymerization processing procedure, such as dialysis, to preserve the as-formed morphology of polyaniline nanofibers. Our study also suggests that polyaniline could adopt the nanofiber structure as its intrinsic morphology when it is synthesized in a simple oxidative chemical polymerization system consisting of only aniline, (NH(4))(2)S(2)O(8) and HCl in an aqueous medium at room temperature. (C) 2008 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 01/10415-6 - Utilização de trilhas de polímeros condutores e de nanofibras para a fabricação de sensores de substâncias húmicas
• Beneficiário: Everaldo Carlos Venancio
• Modalidade de apoio: Bolsas no Exterior - Pesquisa