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US 7,381,331 B2Granted
Hydrophilic membrane and associated method
AssigneeGeneral Electric Company
InventorsHieu Minh Duong, Hongyi Zhou, Rainer Koeniger, Daniel Joseph Brunelle, Daniel Robert Olson, Karmin Lorraine Olson
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Abstract
A membrane is provided, which may include a microporous base membrane; and a cross-linkable coating disposed on a surface of the membrane. The coating may include polyvinyl nucleophilic polymer and a urethane or a blocked isocyanate. The coating may be cross-linked. Also provided is a method of making the membrane.
Claims22
A membrane, comprising:
- A microporous base membrane;
- and a cross-linkable coating disposed on a surface of the membrane, and the coating comprising a polyvinyl nucleophilic polymer and a blocked isocyanate, or the blocked isocyanate and a urethane, wherein the blocked isocyanate comprises a blocking agent, and the blocking agent comprises at least one of a nitrogen-containing moiety, and ester moiety, or an oxime moiety;
- wherein the coating forms a hydrophilic interpenetrating network comprising inter/intramolecular ammonium-carboxylate ion pairs.
A method of forming a membrane, comprising:
- applying a coating to a surface of a porous base membrane, wherein the coating comprises a polyvinyl nucleophilic polymer and a blocked isocyanate
- wherein the blocked isocyanate comprises a blocking agent, and the blocking agent comprises at least one of a nitrogen-containing moiety, an ester moiety, or an oxime moiety;
- and
- unblocking the blocked isocyanate to form a hydrophilic interpenetrating network comprising one or both of carboxylic acid groups or inter/intramolecular ammonium-carboxylate ion pairs.
1 more element
Dependencies are inferred from the claim text.