Semi-permeable membranes prepared via reaction of cationic group

Details Semi-permeable membranes prepared via reaction of cationic group Semi-permeable membranes prepared via reaction of cationic group

1985-10-22

1987-11-03

Henderson, Christopher

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

21050027, 21050034, 21050035, 21050043, 21050042, 21050038, 4283044, 4283155, 4283135, 4283117, B32B 500, B01D 1300

Patent

active

047043245

ABSTRACT:
A novel composite membrane and methods of making the membrane are described. The discriminating layer of the membrane is prepared by reaction of a reactive cationic compound group with a compound bearing a nucleophilic moiety. At least one of the reactants bears an average of two or more reactive groups. The reaction product contains covalent bonds formed via charge eliminating reactions.
In a preferred embodiment of the invention, the nucleophilic group is anionic and a coacervate is formed initially on a microporous substrate. The resulting membrane may be useful for reverse osmosis, gas or ultrafiltration separations.

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