Proton exchange membrane and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2017187058-A1
Application number	US-201615097015-A
Country	US
Kind code	A1
Filing date	Apr 12, 2016
Priority date	Dec 24, 2015
Publication date	Jun 29, 2017
Grant date	—

Abstract

A manufacturing method of a proton exchange membrane is provided, which includes the steps as follows. The hydroxyl groups are disposed on the surface of a substrate by a hydrophilic treatment. The hydroxyl groups on the substrate are chemically modified with a coupling agent by a sol-gel process. The substrate is exposed to an amino acid with a phosphonate radical so that the amino acid containing a phosphonate radical can be chemically bonded with the coupling agent. The chemically bonded substrate is immersed in phosphoric acid for absorbing the phosphoric acid. The substrate blended with the phosphoric acid is placed between at least two leak-proof films for the purpose of preventing the leakage of the absorbed phosphoric acid. The proton exchange membrane manufactured by this method enable to retain the phosphoric acid in organic/inorganic complex form and micron/nano complex pore size.

First claim

What is claimed is:

1 . A method of manufacturing a proton exchange membrane, comprising the following steps of:
disposing hydroxyl groups on a surface of a substrate by a hydrophilic treatment; chemically modifying the hydroxyl groups disposed on the substrate with a coupling agent by a sol-gel process; chemically bonding an amino acid containing a phosphonate radical with the coupling agent chemically modifying the substrate; making the substrate which is chemically bonded to absorb phosphoric acid; and placing the substrate blended with the phosphoric acid between at least two leak-proof films for preventing the leakage of the absorbed phosphoric acid.

2 . The method of manufacturing the proton exchange membrane of claim 1 , wherein the substrate comprises glass fiber, polybenzimidazoles, polyolefin, or polyacrylamide/polyvinyl alcohol.

3 . The method of manufacturing the proton exchange membrane of claim 1 , wherein the coupling agent comprises (3-glycidyloxypropyl)trimethoxysilane.

4 . The method of manufacturing the proton exchange membrane of claim 1 , wherein the amino acid containing a phosphonate radical comprises O-phospho-DL-serine, O-phospho-L-threonine, O-phospho-L-tyrosine, or N-phosphonomethylglycine.

5 . The method of manufacturing the proton exchange membrane of claim 1 , wherein the least two leak-proof films comprise a polytetrafluoroethylene film, a graphene oxide, or a polycarbonate membrane.

6 . A proton exchange membrane, comprising:
a substrate; a coupling agent chemically modifying the substrate by a sol-gel process; serine containing a phosphonate radical chemically bonded with the coupling agent; phosphoric acid absorbed on the substrate; and at least two leak-proof films, wherein the substrate blended with the phosphoric acid is placed between the least two leak-proof films for preventing the leakage of the absorbed phosphoric acid.

7 . The proton exchange membrane of claim 6 , wherein the substrate comprises glass fiber, polybenzimidazoles, polyolefin, or polyacrylamide/polyvinyl alcohol.

8 . The proton exchange membrane of claim 6 , wherein the coupling agent comprises (3 -glycidyloxypropyl)trimethoxysilane.

9 . The proton exchange membrane of claim 6 , wherein the serine containing a phosphonate radical comprises O-phospho-DL-serine, O-phospho-L-threonine, O-phospho-L-tyrosine, or N-phosphonomethylglycine.

10 . The proton exchange membrane of claim 6 , wherein the least two leak-proof films comprise a polytetrafluoroethylene film, a graphene oxide, or a polycarbonate membrane.

Assignees

• Nat Univ Tsing Hua

Inventors

• Tseng Fan-Gang
• Wang Pen-Cheng
• Chiu Yu-Ting

Classifications

• H01M8/1004 Primary

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• Y02E60/50

  Fuel cells · CPC title

• H01M8/106

  characterised by the chemical composition of the porous support · CPC title

• H01M8/1058

  characterised by a porous support having no ion-conducting properties · CPC title