Comparative study of polyaniline cast films prepared from enzymatically and chemically synthesized polyaniline

被引：111

作者：

Cruz-Silva, R

Romero-García, J

Angulo-Sánchez, JL

Flores-Loyola, E

Farías, MH

Castillón, FF

Díaz, JA

机构：

[1] Ctr Invest Quim Aplicada, Lab Biopolmeros, Saltillo, Coahuila, Mexico

[2] Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada, Baja California, Mexico

来源：

POLYMER | 2004年 / 45卷 / 14期

关键词：

polyaniline; enzymatic synthesis; cast films;

D O I：

10.1016/j.polymer.2004.05.007

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Enzymatically and chemically synthesized polyaniline (Pani) were used to prepare free standing cast films from N-methyl-2-pyrrolidinone solutions. The films were redoped by immersion in hydrochloric or p-toluensulfonic acid solutions. Physical and chemical properties were investigated using UV-visible, Fourier transform Infrared and X-ray photoelectron (XPS) spectroscopic techniques. Analysis by XPS revealed changes in the -N=/NH- ratio that indicate cross-linking in the surface of both types of films, whereas FT-IR indicates cross-linking in the core of films prepared with enzymatically synthesized Pani. Such changes can be attributed to the catalyzing effect of sulfonic residues and chain defects of the polymer. Consequently, the degree of doping of the films prepared with enzymatically synthesized Pani was lower compared to films prepared with chemically synthesized Pani. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：4711 / 4717

页数：7

共 50 条

[1] CONJUGATED POLYMER-FILMS FOR GAS SEPARATIONS [J].