Ion exchange membrane

Patent metadata

Field	Value
Publication number	US-2017183464-A1
Application number	US-201615136086-A
Country	US
Kind code	A1
Filing date	Apr 22, 2016
Priority date	Dec 28, 2015
Publication date	Jun 29, 2017
Grant date	—

Abstract

An ion exchange membrane is provided. The ion exchange membrane includes a reaction product of a polymer and a cross-linking reagent. The polymer includes a first repeat unit, and a second repeat unit. In particular, the first repeat unit is

and, the second repeat unit is

wherein R + is

A − is F − , Cl − , Br − , I − , OH − , HCO 3 − , HSO 4 − , SbF 6 − , BF 4 − , H 2 PO 4 − , H 2 PO 3 − , or H 2 PO 2 − ; X is CH 2  i YCH 2  j , i and j are independently 0, or an integer from 1 to 4; Y is —O—, —S—, —CH 2 —, or —NH—; R 1 is independently C 1-8 alkyl group; and, R 2 and R 3 are hydrogen, or independently C 1-8 alkyl group; and, the cross-linking reagent is a compound having at least two imide groups.

First claim

1 . An ion exchange membrane, comprising a reaction product of a polymer and a cross-linking agent, wherein the polymer comprises a first repeat unit and a second repeat unit, wherein the first repeat unit is

the second repeat unit is

wherein R + is

A − is F − , Cl − , Br − , I − , OH − , HCO 3 − , HSO 4 − , SbF 6 − , BF 4 − , H 2 PO 4 − , H 2 PO 3 − , or H 2 PO 2 − ; X is CH 2  i YCH 2  k , i and j is independently 0, or an integer from 1 to 6, Y is —O—, —S—, —CH 2 —, or —NH—; R 1 is independently C 1-8 alkyl group; and, R 2 and R 3 are independently hydrogen, or C 1-8 alkyl group; and, the cross-linking agent is a compound having at least two imide groups.

2 . The ion exchange membrane as claimed in claim 1 , wherein the ratio between the first repeat unit and the second repeat unit is between 1:99 and 99:1.

3 . The ion exchange membrane as claimed in claim 1 , wherein R 1 is methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, pentyl, hexyl, cyclohexyl, cyclopentyl, heptyl, or octyl.

4 . The ion exchange membrane as claimed in claim 1 , wherein R 2 and R 3 are independently hydrogen, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, pentyl, hexyl, cyclohexyl, cyclopentyl, heptyl, or octyl.

5 . The ion exchange membrane as claimed in claim 1 , wherein the first repeat unit is

wherein R + is

A − is F − , Cl − , Br − , I − , OH − , HCO 3 − , HSO 4 − , SbF 6 − , BF 4 − , H 2 PO 4 − , H 2 PO 3 − , or H 2 PO 2 − ; i and j is independently an integer from 1 to 6; and, R 2 and R 3 are independently hydrogen, or C 1-8 alkyl group.

6 . The ion exchange membrane as claimed in claim 1 , wherein the first repeat unit is

wherein A − is F − , Cl − , Br − , I − , OH − , HCO 3 − , HSO 4 − , SbF 6 − , BF 4 − , H 2 PO 4 − , H 2 PO 3 − , or H 2 PO 2 − ; X is CH 2  i YCH 2  j , i and j is independently an integer from 1 to 6, Y is —O—, —S—, —CH 2 —, or —NH—; and, R 2 and R 3 are independently hydrogen, or C 1-8 alkyl group.

7 . The ion exchange membrane as claimed in claim 1 , wherein the second repeat unit is

8 . The ion exchange membrane as claimed in claim 1 , wherein the polymer further comprising a third repeat unit, wherein the third repeat unit is

9 . The ion exchange membrane as claimed in claim 8 , wherein the ratio between the third repeat unit and the sum of the first repeat unit and the second repeat unit is between 0.1:100 and 5:100.

10 . The ion exchange membrane as claimed in claim 1 , wherein the imide group in the cross-linking agent is maleimide group.

11 . The ion exchange membrane as claimed in claim 10 , wherein the cross-linking agent is

wherein Z is

wherein Y 1 is single bond, —O—, —S—, —CH 2 —, or —NH—, R 4 is independently hydrogen, or C 1-4 alkyl group; n≧1; x is an integer from 1 to 12; and, y and z are independently an integer from 1 to 5.

12 . The ion exchange membrane as claimed in claim 1 , wherein the cross-linking agent is a reaction product of compound (a) and compound (b), wherein compound (a) is

wherein Z is

wherein Y 1 is single bond, —O—, —S—, —CH 2 —, or —NH—, R 4 is independently hydrogen, or C 1-4 alkyl group; and, n≧1; x is an integer from 1 to 12; and, y and z are independently an integer from 1 to 5, wherein compound (b) has a structure represented by Formula (I) or Formula (II)

wherein R 5 is independently hydrogen, or C 1-4 alkyl group; and, R 6 is independently hydrogen, or C 1 - 4 alkyl group.

Assignees

• Ind Tech Res Inst

Inventors

• Tsai Cheng-Hsiu
• Tsai Li-Duan
• WANG Chiu-Tung
• Su Chiu-Hun
• Lin Yueh-Wei

Classifications

• C08J5/2218 Primary

  Synthetic macromolecular compounds · CPC title

• C08G61/02

  Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes · CPC title

• C08G2261/3325

  derived from other polycyclic systems · CPC title

• C08G2261/1412

  Saturated aliphatic units · CPC title

• C08J2365/00

  Characterised by the use of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08J2307/00 - C08J2357/00, C08J2361/00 take precedence); Derivatives of such polymers · CPC title