Hoechst Celanese Corporation

Brenda A Bembry-Ross

Tai-Shung Chung

Rachel S Kohn

Edward R Kafchinski

Mark A Spak

E Ronald Kafchinski

C Glen Wensley

A composite fiber or film for use in a fluid separation membrane made of PAN coated with an intermediate permeable material and further coated with a selective layer. The PAN fiber or film is pre-wet with perfluoroether prior to being coated with the intermediate material, to produce a membrane material having enhanced permeability. The selective layer produces a high separation factor.

High performance pan composite membranes

A novel method for making a composite separation membrane, and the product of that method. This novel method includes applying one or more perfluoroethers to the surface of a microporous fiber or film made of a polymer such as PAN, and subsequently coating that fiber or film surface with a layer of selective material. This method provides a more permeable composite membrane than would be obtained by coating a fiber or film that had not been pre-wetted with perfluoroether.

Pan composite membranes

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Newark, NJ, United States of America

Brenda A Bembry-Ross