The effects of humidity on gas transport properties of sulfonated copolyimides

被引：38

作者：

Piroux, F

Espuche, E

Mercier, R

机构：

[1] Lab. Mat. Polymeres des Biomateriaux, Universite Claude Bernard, UMR 5627 Bât. ISTIL 43, 69622 Villeurbanne Cedex

[2] Lab. Mat. Organ. Proprietes S., 69390 Vernaison

来源：

JOURNAL OF MEMBRANE SCIENCE | 2004年 / 232卷 / 1-2期

关键词：

Copolymers; Gas permeation; Hydration; Sulfonated polyimides;

D O I：

10.1016/j.memsci.2003.12.004

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Hydrogen, oxygen and carbon dioxide transport properties are studied at various hydration rates for a large series of sulfonated copolyimides synthesized with a naphthalenic dianhydride, a sulfonated diamine and various non-sulfonated diamines. For all copolymers, the gas permeability coefficient decreases when the relative humidity increases in the range 0-70% and an increase of gas flux is observed at high hydration. The magnitude of the permeability coefficient variation depends on the gas polarity and on the copolymer composition. A detailed analysis of the gas transport properties at anhydrous state and of the water sorption mechanism as a function of the copolymers composition allows to explain all the gas permeability variations as a function of hydration. © 2003 Elsevier B.V. All rights reserved.

引用

页码：115 / 122

页数：8

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