Method for making porous asymmetric membranes and associated membranes and separation modules

    公开(公告)号:US10421046B2

    公开(公告)日:2019-09-24

    申请号:US15568677

    申请日:2016-04-22

    Abstract: An method of making a porous asymmetric membrane involves dissolving a poly(phenylene ether), poly(phenylene ether) copolymer, polyethersulfone, polysulfone, polyphenylsulfone, polyimide, polyetherimide, polyvinylidene fluoride, or a combination thereof in a water-miscible polar aprotic solvent to provide a membrane-forming composition; and phase-inverting the membrane-forming composition in a first non-solvent composition composed of water, a water-miscible polar aprotic solvent, or a mixture thereof, and a polymer additive dissolved in the first non-solvent composition. The method can be a method of making a hollow fiber by coextrusion through a spinneret having an annulus and a bore, including coextruding the membrane-forming composition through the annulus, and the first non-solvent composition through the bore, into a second non-solvent composition composed of water, a water-miscible polar aprotic solvent, or a mixture thereof to form the hollow fiber.

    AMPHIPHILIC BLOCK COPOLYMER; COMPOSITION, MEMBRANE, AND SEPARATION MODULE THEREOF; AND METHODS OF MAKING SAME
    8.
    发明申请
    AMPHIPHILIC BLOCK COPOLYMER; COMPOSITION, MEMBRANE, AND SEPARATION MODULE THEREOF; AND METHODS OF MAKING SAME 审中-公开
    聚合嵌段共聚物; 组合物,膜及其分离模块; 及其制备方法

    公开(公告)号:US20170037177A1

    公开(公告)日:2017-02-09

    申请号:US15303561

    申请日:2015-04-30

    Abstract: An amphiphilic block copolymer comprises a poly(phenylene ether) block or a poly(phenylene ether) copolymer block and a hydrophilic block or graft. A method of making the amphiphilic block copolymer comprises polymerization of a hydrophilic ethylenically unsaturated monomer in the presence of poly(phenylene ether) or a poly(phenylene ether) copolymer to make the amphiphilic block copolymer. A porous asymmetric membrane comprises a poly(phenylene ether) or poly(phenylene ether) copolymer, and the amphiphilic block copolymer comprising a poly(phenylene ether) block or a poly(phenylene ether) copolymer block, and a hydrophilic block or graft. The porous asymmetric membrane is made by phase-inversion of a dope solution of the poly(phenylene ether) or poly(phenylene ether) copolymer and the amphiphilic block copolymer in a coagulation bath.

    Abstract translation: 两亲嵌段共聚物包括聚(亚苯基醚)嵌段或聚(苯醚)共聚物嵌段和亲水嵌段或接枝。 制备两亲性嵌段共聚物的方法包括在聚(苯醚)或聚(苯醚)共聚物存在下聚合亲水性烯属不饱和单体以制备两亲性嵌段共聚物。 多孔不对称膜包括聚(亚苯基醚)或聚(苯醚)共聚物,以及包含聚(亚苯基醚)嵌段或聚(苯醚)共聚物嵌段的两亲性嵌段共聚物和亲水性嵌段或接枝。 多孔不对称膜是通过聚苯醚或聚苯醚共聚物的掺杂溶液和两亲性嵌段共聚物在凝固浴中进行相转化而制成的。

Patent Agency Ranking