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Gas permeation property of polyaniline films
Author(s) -
Hachisuka Hisao,
Ohara Tomomi,
Ikeda KenIchi,
Matsumoto Kenji
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070561109
Subject(s) - dopant , polyaniline , permeation , selectivity , polymer , doping , materials science , chemical engineering , sorption , polymer chemistry , thermal diffusivity , permeability (electromagnetism) , chemistry , organic chemistry , composite material , membrane , adsorption , catalysis , biochemistry , physics , optoelectronics , engineering , polymerization , quantum mechanics
We examined the influence of polyaniline (PAn)'s unit sequence and doping with low molecular weight dopants or polymer dopants on permeation property. It was found that CO 2 permeability was increased by the formation of a quinonediimine unit in PAn with the oxidation. CO 2 sorption amount of PAn was decreased by oxidation. The increase of CO 2 permeability with oxidation, therefore, resulted from the increase of diffusivity, which was attributable to morphological variation by the increase of a quinonediimine unit. The permselectivity of PAn films was found to be remarkably improved by doping. In particular, the selectivity value of the PAn film doped with polyvinyl sulphonic acid as a polymer dopant went up to over 2,000. This remarkable increase of selectivity was found to result in the increase of selectivity, depending on diffusivity. It was also found that the permselectivity of the PAn film doped by polymer dopants was surpassed, as compared with that doped by low molecular dopants. © 1995 John Wiley & Sons, Inc.