Porous asymmetric polyphenylene ether membranes and associated separation modules and methods
First Claim
1. A separation module comprising a porous asymmetric membrane, comprising a poly(phenylene ether) copolymer comprising repeat units derived from 2,6-dimethylphenol and repeat units derived from 2-methyl-6-phenylphenol, and having an intrinsic viscosity of 0.7 to 1.5 deciliters per gram, measured in chloroform at 25°
- C. and a weight average molecular weight of 100,000 to 500,000 daltons, measured by gel permeation chromatography against polystyrene standards; and
an amphiphilic block copolymer;
wherein the porous asymmetric membrane is in a flat sheet, hollow fiber, capillary, or tubular configuration.
4 Assignments
0 Petitions
Accused Products
Abstract
A porous asymmetric membrane comprises a hydrophobic polymer comprising a poly(phenylene ether) or poly(phenylene ether) copolymer; and a polymer additive. A separation module can be fabricated from the porous asymmetric membrane. A method of forming the porous asymmetric membrane comprises: dissolving a hydrophobic polymer comprising a poly(phenylene ether) or poly(phenylene ether) copolymer and, a polymer additive in a water-miscible polar aprotic solvent to form a porous asymmetric membrane-forming composition; and phase-inverting the porous asymmetric membrane forming-composition in a first non-solvent composition to form the porous asymmetric membrane. The polymer additive comprises hydrophilic functional groups, copolymerized hydrophilic monomers, or blocks of hydrophilic monomer repeat units. For example, the polymer additive can comprise a hydrophilic polymer or amphiphilic polymer. The porous asymmetric membrane can be a flat membrane or hollow fiber.
-
Citations
20 Claims
-
1. A separation module comprising a porous asymmetric membrane, comprising a poly(phenylene ether) copolymer comprising repeat units derived from 2,6-dimethylphenol and repeat units derived from 2-methyl-6-phenylphenol, and having an intrinsic viscosity of 0.7 to 1.5 deciliters per gram, measured in chloroform at 25°
- C. and a weight average molecular weight of 100,000 to 500,000 daltons, measured by gel permeation chromatography against polystyrene standards; and
an amphiphilic block copolymer;
wherein the porous asymmetric membrane is in a flat sheet, hollow fiber, capillary, or tubular configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- C. and a weight average molecular weight of 100,000 to 500,000 daltons, measured by gel permeation chromatography against polystyrene standards; and
Specification