Charge-modified hydrophobic membrane materials and method for ma

Details Charge-modified hydrophobic membrane materials and method for ma Charge-modified hydrophobic membrane materials and method for ma

1988-06-21

1991-04-02

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050036, 21050037, 427245, B01L 6700

Patent

active

050045431

ABSTRACT:
A hydrophobic material having a crosslinked, cationic charge-modifying coating such that the majority of the ion exchange capacity of the material is provided by fixed formal positive charge groups is disclosed. The material is produced by contacting a hydrophobic substrate with a mildly alkaline, aqueous organic solvent solution into which has been dissolved a cationic charge-modifying agent. The charge-modifying agent comprises a water soluble, organic polymer having a molecular weight of greater than about 1000, wherein the polymer chain contains both fixed formal positive charge groups and halohydrin groups.
Materials of the type described herein can be used in a variety of applications including macromolecular blotting and filtration.

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