Modified nanometer material for improving stability of heteropoly acid in proton exchange membrane and preparation method thereof

A technology for proton exchange membranes and nanomaterials, applied in the field of modified nanomaterials and their preparations for improving the stability of heteropolyacids in proton exchange membranes, can solve the problems of difficult and easy immobilization of heteropolyacids, so as to improve stability and promote Proton conduction, the effect of improving electrical conductivity

Inactive Publication Date: 2017-05-31
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem that heteropolyacids are difficult to fix in the prior art, the present invention provides a modified nanomaterial for improving the stability of heteropolyacids in proton exchange membranes and a preparation method thereof

Method used

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  • Modified nanometer material for improving stability of heteropoly acid in proton exchange membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Add 100ml of ultrapure water to 4g of halloysite nanotubes, sonicate for 0.5h, and add 0.3g of Tri-hydrochloric acid and 0.4g of dopamine hydrochloride under magnetic stirring; adjust the pH value to 8.5 with 0.01mol / L sodium hydroxide , continue to stir for 10 h, wash with ultrapure water, and dry at 35°C to obtain D-HNTs;

[0023] Add D-HNTs and 40ml tetrahydrofuran to a 100ml three-necked flask, sonicate for 0.5h, blow in argon gas to remove water vapor in the three-necked flask, add 2ml triethylamine, 6ml 2-bromo-2-methylpropionyl bromide (BIBB) , magnetic sub-stirring reaction for 24h; first cleaned by ultrasonic centrifugation with acetone and then washed with 50% methanol aqueous solution, and dried at 35°C to obtain Br-HNTs.

[0024] Add 40ml of 50% N-N dimethylformamide aqueous solution to a 100ml three-necked flask, pass through argon for 2h to remove the oxygen in the solution, then add Br-HNTs, 0.6g CuBr, 1g CuBr 2 , 7.5ml of vinylimidazole, 0.9ml of hexame...

Embodiment 2

[0027] Add 100ml of ultrapure water to 4g of graphene oxide nanosheets, ultrasonically for 0.5h, add 0.3g of Tri-hydrochloric acid and 0.4g of dopamine hydrochloride under magnetic stirring; adjust the pH value to 8.5 with 0.01mol / L sodium hydroxide , continue to stir for 10h, wash with ultrapure water, and dry at 35°C to obtain D-GO;

[0028] Add D-GO and 40ml tetrahydrofuran to a 100ml three-necked flask, sonicate for 0.5h, blow in argon gas to remove water vapor in the three-necked flask, add 2ml triethylamine, 6ml 2-bromo-2-methylpropionyl bromide (BIBB) , magnetic sub-stirring reaction for 24h; first cleaned by ultrasonic centrifugation with acetone and then washed with 50% methanol aqueous solution, and dried at 35°C to obtain Br-GO.

[0029] Add 40ml of 50% N-N dimethylformamide aqueous solution to a 100ml three-necked flask, pass through argon for 2h to remove the oxygen in the solution, then add Br-GO, 0.6g CuBr, 1g CuBr 2 , 7.5ml of vinylimidazole, 0.9ml of hexameth...

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PUM

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Abstract

The invention discloses a modified nanometer material for improving the stability of a heteropoly acid in a proton exchange membrane and a preparation method thereof, and belongs to the technical field of organic modification of inorganic nanometer materials. The preparation method comprises the following steps: firstly coating nanometer material with dopamine hydrochloride, introducing active halogen atoms, and realizing graft polymerization of monomers with basic groups through an ATRP reaction on the nanometer material to obtain the modified nanometer material. The method is suitable for tubular nanometer materials and layered nanometer materials. The loss of the heteropoly acid in use is reduced by forming acid-base pairs between the basic groups carried on the nanometer material and the heteropoly acid and the hydrogen-bond interaction, and meanwhile the basic groups have good hydrophilicity, so the conductivity of the proton exchange membrane is improved.

Description

technical field [0001] The invention belongs to the technical field of organic modification of inorganic nanometer materials, and in particular relates to a modified nanometer material for improving the stability of heteropolyacids in proton exchange membranes and a preparation method thereof. Background technique [0002] With the deepening of the energy crisis, people began to focus on exploring new energy sources. Fuel cells have the advantages of high energy efficiency, environmental protection, and low energy conversion temperature. Among them, the proton exchange membrane is one of the core components of the fuel cell, which plays the role of conducting protons and isolating the anode and cathode reactants. At present, the Nafion perfluorosulfonic acid membrane produced by DuPont is widely used, but its conductivity is low at high temperature and low humidity. [0003] Doping heteropolyacids in the proton exchange membrane can help to improve the conductivity of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F226/06C08J5/22H01M8/1018B82Y30/00B82Y40/00C08L61/16
CPCB82Y30/00B82Y40/00C08F292/00C08F2438/01C08J5/2256C08J2361/16H01M8/1018C08F226/06Y02E60/50Y02P70/50
Inventor 林俊刘山新翟绍雄白福军郏慧娜何少剑
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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