Hydrophobic membrane having hydrophilic and charged surface and

Details Hydrophobic membrane having hydrophilic and charged surface and Hydrophobic membrane having hydrophilic and charged surface and

1991-06-26

1992-08-11

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050035, B01D 6700

Patent

active

051376334

ABSTRACT:
The surface of a hydrophobic porous substrate is modified with an interpolymeric network of a hydrophilic crosslinked polymer and a crosslinked-polyamine epichlorohydrin resin having fixed positive charges. The hydrophobic substrate is contacted with a reaction system comprising a solution of (a) monomer precursor to the hydrophilic polymer, a nonionic or cationic polymerization initiator and a crosslinking agent and (b) a precursor to the crosslinked positively charged resin. The monomer is polymerized and cross-linked by free radical polymerization followed by heating the contacted substrate to form the charged resin.

REFERENCES:
patent: 4908236 (1990-03-01), Pitt et al.

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