Functional polymer membrane and method for producing same

Patent metadata

Field	Value
Publication number	US-2016361690-A1
Application number	US-201615248686-A
Country	US
Kind code	A1
Filing date	Aug 26, 2016
Priority date	Feb 28, 2014
Publication date	Dec 15, 2016
Grant date	—

Abstract

A functional polymer membrane including a porous support and a crosslinked polymer electrolyte, in which the film thickness of the functional polymer membrane is smaller than 100 μm, the crosslinked polymer electrolyte is a crosslinked polymer formed by subjecting a composition including a monomer having a (meth)acrylamide skeleton to a polymerization curing reaction, and the proportion of elemental oxygen in the elemental composition excluding elemental hydrogen and helium at the surface of the porous support is from 14.0 atom % to 25.0 atom %; and a method for producing the same are provided.

First claim

What is claimed is:

1 . A functional polymer membrane comprising:
a porous support; and a crosslinked polymer electrolyte, wherein the film thickness of the functional polymer membrane is smaller than 100 μm, the crosslinked polymer electrolyte is a crosslinked polymer formed by subjecting a composition including a monomer having a (meth)acrylamide skeleton to a polymerization curing reaction, the porous support is formed of at least one of polyethylene and polypropylene, and the proportion of elemental oxygen in the elemental composition excluding elemental hydrogen and helium at the surface of the porous support is from 14.0 atom % to 25.0 atom %.

2 . The functional polymer membrane according to claim 1 , wherein the proportion of elemental sulfur in the elemental composition excluding elemental hydrogen and helium at the surface of the porous support is from 0.1 atom % to 10.0 atom %.

3 . The functional polymer membrane according to claim 1 , wherein the porosity of the porous support is from 55% to 85%.

4 . The functional polymer membrane according to claim 1 , wherein the porous support is a nonwoven fabric.

5 . The functional polymer membrane according to claim 1 , wherein the crosslinked polymer has a substituent or a linking group, both of which include at least an ammonium salt and/or a pyridinium salt.

6 . The functional polymer membrane according to claim 1 , wherein the functional polymer membrane is formed by the crosslinked polymer electrolyte being embedded in the pores of the porous support.

7 . The functional polymer membrane according to claim 1 , wherein the crosslinked polymer has a structure represented by the following Formula (I):

wherein in Formula (I), R A1 to R A3 each independently represent a hydrogen atom or an alkyl group; R B1 to R B7 each independently represent an alkyl group or an aryl group; Z A1 to Z A3 each independently represent —NRa-, where Ra represents a hydrogen atom or an alkyl group; L A1 to L A3 each independently represent an alkylene group; R X represents an alkylene group, an alkenylene group, an alkynylene group, an arylene group, —O—, or a divalent linking group combining these; X A1 to X A3 each independently represent a halogen ion or an aliphatic or aromatic carboxylic acid ion; and a to c represent molar ratios of the respective unit structures, and a represents 0 to 0.75, while b and c each independently represent 0.25 to 1.00.

8 . The functional polymer membrane according to claim 1 , wherein the contact angle of water at the membrane surface of the functional polymer membrane is from 80° to 120°.

9 . The functional polymer membrane according to claim 1 , wherein the surface tension at 25° C. of the composition is from 15 mN/m to 27 mN/m.

10 . The functional polymer membrane according to claim 1 , further comprising:
a fluorine-based surfactant.

11 . A method for producing a functional polymer membrane containing a porous support and a crosslinked polymer electrolyte, the functional polymer membrane being the functional polymer membrane according to claim 1 , the method comprising:
impregnating the porous support with the composition including a monomer having a (meth)acrylamide skeleton, and then subjecting the composition to a polymerization curing reaction by irradiating the composition with ultraviolet radiation or/and by heating the composition.

Assignees

• Fujifilm Corp

Inventors

• Takamoto Tetsufumi
• Kaminaga Kuniyuki

Classifications

• B01J41/14 Primary

  obtained by reactions only involving unsaturated carbon-to-carbon bonds · CPC title

• C08J2333/26

  Homopolymers or copolymers of acrylamide or methacrylamide · CPC title

• C08J2335/00

  Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Derivatives of such polymers · CPC title

• B01D61/44

  Ion-selective electrodialysis · CPC title

• B01J47/12

  characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes (electrodialysis or electro-osmosis B01D61/42) · CPC title