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Preparation of 6FDA-based polyimide composite membrane by CVDP process

✍ Scribed by H. Yanagishita; H. Nozoye; T. Nakane

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 324 KB
Volume: 90
Category: Article
ISSN: 0011-9164
DOI: 10.1016/0011-9164(93)80164-i

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✦ Synopsis

Preparation of polyimide composite membranes by a chemical vapor deposition and polymerization process (CVDP) was studied for the development of pervaporation or gas separation membranes . Hexafluoroisopropylidene-2,2-bis [phethalic acid anhydride] (6F-dianhydride) (6FDA) and 4,4'diaminodiphenyl ether (ODA) were used as monomers and were simultaneously deposited on an asymmetric polyimide membrane in vacuum of 10 -6 Torr. The deposited layer of the monomers was converted to polyimide by heating at 250°C at 3 h in an ordinary vacuum oven, and its separation performance for water-ethanol and C0 2-N2 systems was characterized.

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