Inter-penetrating network charge modified microporous membrane

Details Inter-penetrating network charge modified microporous membrane Inter-penetrating network charge modified microporous membrane

B - Operations, Transporting

01

D

B01D 71/68 (2006.01) B01D 67/00 (2006.01) B01D 69/14 (2006.01)

Patent

CA 2155516

Hydrophilic inter-penetrating network charge modified microporous membranes are provided as well as a method of preparing the membranes by casting a membrane matrix blend containing matrix polymer, a solvent system, a wetting polymer compatible with the matrix polymer, and a charge modified system which forms a cross-linked inter-penetrating network structure within the microporous membrane substate during the membrane fabrication process which network structure optionally can be locked in by heat curing. The membranes are useful for filtering ultrapure water with 18 megaohm-cm resistivity for the electronic industry, and they can also be used for the removal of a variety of contaminants from fluid media, such as very fine negatively charged particles, bacteria and endotoxins, with greatly enhanced filtration efficiency.

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