Pore size control of carbonized BPDA-pp'ODA polyimide membrane by chemical vapor deposition of carbon

被引：125

作者：

Hayashi, J ^{[1
]}

Mizuta, H ^{[1
]}

Yamamoto, M ^{[1
]}

Kusakabe, K ^{[1
]}

Morooka, S ^{[1
]}

机构：

[1] KYUSHU UNIV,DEPT CHEM SCI & TECHNOL,FUKUOKA 81281,JAPAN

来源：

JOURNAL OF MEMBRANE SCIENCE | 1997年 / 124卷 / 02期

关键词：

pore size; polyimide membrane; chemical vapor deposition;

D O I：

10.1016/S0376-7388(96)00250-5

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A BPDA-pp'ODA polyimide film was formed on the outer surface of a porous alumina support tube (outside diameter = 2.4 mm), and it was carbonized at an optimized temperature, 700 degrees C. The membrane obtained showed a permeance of 3 x 10(-9) mol . m(-2). s(-1). Pa-1 for O-2 and 2 x 10(-8) mol . m(-2). s(-1). Pa-1 for CO2 and a permselectivity of 10 for O-2/N-2 and 47 for CO2/N-2 at 35 degrees C. The membrane was then modified with carbon deposits formed by pyrolysis of propylene at 650 degrees C. The permselectivities for O-2/N-2 and CO2/N-2 at 35 degrees C were increased to 14 and 73, respectively. Coexisting water vapor decreased permeances of O-2 and N-2 but did not change the O-2/N-2 permselectivity.

引用

页码：243 / 251

页数：9

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