SURFACE STUDIES OF CHEMICALLY PROCESSED POLYANILINE FILMS

被引：33

作者：

KANG, ET ^{[1
]}

NEOH, KG ^{[1
]}

WOO, YL ^{[1
]}

TAN, KL ^{[1
]}

HUAN, CHA ^{[1
]}

WEE, ATS ^{[1
]}

机构：

[1] NATL UNIV SINGAPORE,DEPT PHYS,SINGAPORE 0511,SINGAPORE

来源：

SYNTHETIC METALS | 1993年 / 53卷 / 03期

关键词：

POLYANILINE; FILM; SURFACE; REDOX STATES; GRAFTING; XPS; SEM;

D O I：

10.1016/0379-6779(93)91103-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface structures and redox states of pristine, protonated and surface modified emeraldine (EM) films have been studied by angle-dependent X-ray photoelectron spectroscopy (XPS). The first protonation-deprotonation cycle can increase the intrinsic oxidation state (imine/amine ratio) of EM to near that of pernigraniline. The outermost surface of the EM film generally has a significantly lower intrinsic oxidation state than the bulk. In contrast to protonation by volatile acids, the outermost surface of EM film protonated by a non-volatile acid can exhibit a significantly higher protonation level and almost all the amine nitrogens, in addition to the imine nitrogens, are susceptible to protonation. The pristine, O3-pretreated and once-cycled (acid-base) EM films also exhibit distinctive behaviour towards surface modifications by near-UV light induced graft copolymerization with hydrophilic polymers. The surface characteristics, including morphology, of the three types of films after grafting are also reported.

引用

页码：333 / 345

页数：13

共 27 条

[1] GAS SEPARATION MEMBRANES - A NOVEL APPLICATION FOR CONDUCTING POLYMERS [J].