Pan composite membranes

Details Pan composite membranes Pan composite membranes

1992-12-18

1994-06-14

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050023, 21050043, 21050039, 427246, B01D 6908

Patent

active

053207548

ABSTRACT:
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.

REFERENCES:
patent: 3851036 (1974-11-01), Zurich
patent: 4409162 (1983-10-01), Takao
patent: 4470859 (1984-09-01), Benezra et al.
patent: 4756932 (1988-07-01), Puri
patent: 4881954 (1989-11-01), Bikson et al.
patent: 4935141 (1990-06-01), Buck et al.
patent: 4960519 (1990-10-01), Pasternak et al.

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