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Chemically-bonded HEDP (1-hydroxy ethylidene-1, 1-diphosphonic acid) medium-temperature organic polysiloxane phosphate based proton exchange membrane and preparation method thereof

A technology for compounding hydroxyethylidene diphosphonic acid and polysiloxane phosphonic acid groups, which can be used in electrochemical generators, solid electrolyte fuel cells, fuel cells, etc., and can solve the problems of limited phosphonic acid content and low proton conductivity , to achieve the effect of improving flexibility, good proton conductivity, excellent flexibility and mechanical strength

Inactive Publication Date: 2012-12-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the phosphonic acid monomers to be inserted contain only one phosphoric acid group, the content of phosphonic acid in the corresponding proton exchange membrane is limited, resulting in the existence of the medium temperature proton exchange membrane. The proton conductivity is not high at medium temperature and low humidity. Defects

Method used

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  • Chemically-bonded HEDP (1-hydroxy ethylidene-1, 1-diphosphonic acid) medium-temperature organic polysiloxane phosphate based proton exchange membrane and preparation method thereof
  • Chemically-bonded HEDP (1-hydroxy ethylidene-1, 1-diphosphonic acid) medium-temperature organic polysiloxane phosphate based proton exchange membrane and preparation method thereof
  • Chemically-bonded HEDP (1-hydroxy ethylidene-1, 1-diphosphonic acid) medium-temperature organic polysiloxane phosphate based proton exchange membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A chemically bonded hydroxyethylidene diphosphonic acid medium-temperature organopolysiloxane phosphonic acid proton exchange membrane, which is prepared according to the following steps:

[0040] 1) Weigh the raw materials according to the mass ratio of hydroxyethylidene diphosphonic acid: dimethyl sulfoxide as 1:4; under the protection of nitrogen, slowly add hydroxyethylidene diphosphine into the three-necked flask with dimethyl sulfoxide acid, stir at room temperature until the solution is clear and transparent, heat the oil bath to 160°C and reflux for 0.5 hours; after the solution is cooled to 110°C, use an oil pump to distill off dimethyl sulfoxide under reduced pressure to obtain 1,1-vinyl diphosphonic acid liquid;

[0041] 2) According to the molar ratio of 1,1-vinyl diphosphonic acid: 3-(methacryloyloxy)propyltrimethoxysilane (DB-570): azobisisobutylcyanide: ethanol is 1:1 : 1×10 -3 : 10 Weigh the raw material, put it into the reactor, heat up to 60°C, and s...

Embodiment 2

[0045] A chemically bonded hydroxyethylidene diphosphonic acid medium-temperature organopolysiloxane phosphonic acid proton exchange membrane, which is prepared according to the following steps:

[0046] 1) Weigh the raw materials according to the mass ratio of hydroxyethylidene diphosphonic acid: dimethyl sulfoxide as 1:6; under the protection of nitrogen, slowly add hydroxyethylidene diphosphine into the three-necked flask with dimethyl sulfoxide acid, stir at room temperature until the solution is clear and transparent, heat the oil bath to 160°C and reflux for 1 hour; after the solution is cooled to 110°C, use an oil pump to distill off dimethyl sulfoxide under reduced pressure to obtain 1,1-vinyl diphosphonic acid liquid;

[0047] 2) According to the molar ratio of 1,1-vinyl diphosphonic acid: 3-(methacryloxy)propyltrimethoxysilane (DB-570): azobisisobutylcyanide: ethanol is 1:2 : 1×10 -3 : 10 Weigh the raw material, put it into the reactor, heat up to 60°C, and stir fo...

Embodiment 3

[0051] A chemically bonded hydroxyethylidene diphosphonic acid medium-temperature organopolysiloxane phosphonic acid proton exchange membrane, which is prepared according to the following steps:

[0052] 1) Weigh the raw materials according to the mass ratio of hydroxyethylidene diphosphonic acid: dimethyl sulfoxide as 1:8; under the protection of nitrogen, slowly add hydroxyethylidene diphosphine into the three-necked flask with dimethyl sulfoxide acid, stir at room temperature until the solution is clear and transparent, heat the oil bath to 160°C and reflux for 1.5 hours; after the solution is cooled to 110°C, use an oil pump to distill off dimethyl sulfoxide under reduced pressure to obtain 1,1-vinyl diphosphonic acid liquid;

[0053] 2) According to the molar ratio of 1,1-vinyl diphosphonic acid: 3-(methacryloyloxy)propyltrimethoxysilane (DB-570): azobisisobutylcyanide: ethanol is 1:3 : 1.5×10 -3 : 10 Weigh the raw material, put it into the reactor, heat up to 70°C, and...

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Abstract

The invention relates to a chemically-bonded HEDP (1-hydroxy ethylidene-1, 1-diphosphonic acid) medium-temperature organic polysiloxane phosphate based proton exchange membrane. The membrane is prepared by the following steps: firstly, under protection of nitrogen, mixing dimethyl sulfoxide and HEDP, stirring to obtain clear and transparent mixture, and performing reflux reaction at 160 DEG C; removing the dimethyl sulfoxide after the solution is cooled to 110 DEG C to obtain 1,1-vinyl diphosphonic acid liquid; secondly, mixing 1, 1-vinyl diphosphonic acid, 3-(methacryloxy) propyl trimethoxyl silane, 2, 2'-azobisisobutyronitrile and ethanol, stirring at 60-80 DEG C to react, cooling to room temperature, adding diluted hydrochloric acid, and stirring to obtain clear and transparent sol; thirdly, performing gelation to the sol to obtain a gel membrane; and fourthly, drying the gel membrane to obtain the chemically-bonded HEDP medium-temperature organic polysiloxane phosphate based proton exchange membrane. The membrane has high proton conductivity under medium temperature and low humidity and has excellent flexibility and mechanical property.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a chemically bonded hydroxyethylidene diphosphonic acid medium-temperature organopolysiloxane phosphonic acid proton exchange membrane and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a new type of energy conversion device that uses hydrogen ions as conductive ions. It has the advantages of high efficiency, energy saving, environmental friendliness, and the ability to avoid electrolyte corrosion. These advantages make PEMFC have broad application prospects in both stationary and mobile power supplies. The proton exchange membrane is the most important component of the proton exchange membrane fuel cell. It has high proton conductivity, and can prevent electron transport and prevent cross-penetration of hydrogen at the cathode and oxygen at the anode. The solid polymer currently used in fuel cells is a perfluorosulfon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10H01M8/102
CPCY02E60/521Y02E60/50
Inventor 沈春晖郭芷含孔更金陈成高山俊
Owner WUHAN UNIV OF TECH
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