Ion exchange membrane, method for manufacturing same, module, and device

Patent metadata

Field	Value
Publication number	US-2017128931-A1
Application number	US-201715413432-A
Country	US
Kind code	A1
Filing date	Jan 24, 2017
Priority date	Aug 14, 2014
Publication date	May 11, 2017
Grant date	—

Abstract

An object of the present invention is to provide a high-performance ion exchange membrane having a small defect and a sufficient mechanical strength, a method for manufacturing the ion exchange membrane, and a module and a device which include the ion exchange membrane.
An ion exchange membrane of the present invention contains a resin having an amino group and a constitutional unit represented by Formula 1, in which the number of amino groups per dry mass is 0.15 to 2.4 mmol/g. In Formula 1, L 1 represents an alkylene group or an alkenylene group, R a , R b , R c , and R d each independently represent an alkyl group or an aryl group, R a and R b and/or R c and R d may form a ring by being bonded to each other, n1 and n2 each independently represent an integer of 1 to 10, and X 1 − and X 2 − each independently represent an organic or inorganic anion.

First claim

What is claimed is:

1 . An ion exchange membrane comprising:
a resin having an amino group and a constitutional unit represented by Formula 1, wherein the number of amino groups per dry mass is 0.15 to 2.4 mmol/g,

in Formula 1, L 1 represents an alkylene group or an alkenylene group, R a , R b , R c , and R d each independently represent an alkyl group or an aryl group, R a and R b and/or R c and R d may form a ring by being bonded to each other, n1 and n2 each independently represent an integer of 1 to 10, and X 1 − and X 2 − each independently represent an organic or inorganic anion.

2 . The ion exchange membrane according to claim 1 ,
wherein the resin has, as a structure having the amino group, a constitutional unit represented by the following Formula 2 in at least a portion of the resin,

in Formula 2, L 2 represents an alkylene group or an alkenylene group, R e , R f , R g , and R h each independently represent an alkyl group or an aryl group, R e and R f and/or R g and R h may form a ring by being bonded to each other, n3 represents an integer of 1 to 10, and X 3 − represents an organic or inorganic anion.

3 . The ion exchange membrane according to claim 1 ,
wherein R a and R b and/or R c and R d form a ring by being bonded to each other.

4 . The ion exchange membrane according to claim 2 ,
wherein R e and R f and/or R g and R h form a ring by being bonded to each other.

5 . The ion exchange membrane according to claim 1 ,
wherein X 1 − and X 2 − each independently are a halide ion.

6 . The ion exchange membrane according to claim 1 ,
wherein the resin further has a cross-linked structure in addition to the constitutional unit represented by Formula 1.

7 . The ion exchange membrane according to claim 6 ,
wherein a content of the cross-linked structure other than the constitutional unit represented by Formula 1 is 0.05 to 0.5 mmol/g with respect to a total mass of the resin.

8 . A method for manufacturing the ion exchange membrane according to claim 1 , comprising:
a membrane preparation step of preparing a membrane containing a resin having a constitutional unit represented by Formula 3; and a reaction step of reacting the membrane with an amine compound represented by Formula 4,

in Formulae 3 and 4, n4 represents an integer of 1 to 10, X represents a leaving group, L 3 represents an alkylene group or an alkenylene group, R i , R j , R k , and R m each independently represent an alkyl group or an aryl group, and R i and R j and/or R k and R m may form a ring by being bonded to each other.

9 . The method for manufacturing the ion exchange membrane according to claim 8 ,
wherein in the membrane preparation step, the resin having a constitutional unit represented by Formula 3 is formed by polymerizing a composition containing a compound represented by Formula 5 and a polymerization initiator,

in Formula 5, n4 represents an integer of 1 to 10, and X represents a leaving group.

10 . The method for manufacturing the ion exchange membrane according to claim 9 ,
wherein the compound represented by Formula 5 is a liquid at 25° C.

11 . The method for manufacturing the ion exchange membrane according to claim 9 ,
wherein a content of the compound represented by Formula 5 in the composition is equal to or greater than 50% by weight.

12 . The method for manufacturing the ion exchange membrane according to claim 9 ,
wherein the composition does not contain an organic solvent, or a content of an organic solvent in the composition is greater than 0% by mass and equal to or less than 1% by mass.

13 . The method for manufacturing the ion exchange membrane according to claim 8 ,
wherein X is a halogen atom.

14 . The method for manufacturing the ion exchange membrane according to claim 8 ,
wherein in the reaction step, both of the constitutional unit represented by Formula 1 and the constitutional unit represented by Formula 2 are formed in the resin.

15 . A module comprising:
the ion exchange membrane according to claim 1 .

16 . A device comprising:
the ion exchange membrane according to claim 1 .

Assignees

• Fujifilm Corp

Inventors

• Kaminaga Kuniyuki
• Inoue Kazuomi

Classifications

• B01J41/14 Primary

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

• C08J2325/18

  Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen · 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

• B01J41/07

  in the weakly basic form · CPC title

• C08F8/32

  by reaction with amines · CPC title