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Preparation method of polyvinylidene fluoride grafted p-styrenesulfonic acid proton exchange membrane

A technology of p-styrene sulfonic acid and polyvinylidene fluoride, which is applied in the field of proton exchange membranes for hydrogen-oxygen fuel cells, can solve the problems of complex manufacturing process and low reactivity, and achieve good chemical stability, high proton conductivity, and easy The effect of preparation

Inactive Publication Date: 2012-06-13
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to address the above problems, to provide a PVDF grafted p-styrene sulfonic acid proton exchange membrane preparation method, in order to solve the existing proton exchange membrane in the preparation process of low reactivity, complex production process problem

Method used

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  • Preparation method of polyvinylidene fluoride grafted p-styrenesulfonic acid proton exchange membrane
  • Preparation method of polyvinylidene fluoride grafted p-styrenesulfonic acid proton exchange membrane
  • Preparation method of polyvinylidene fluoride grafted p-styrenesulfonic acid proton exchange membrane

Examples

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Effect test

Embodiment 1

[0046] 1) Weigh a certain amount of solid NaOH, first add water and stir to dissolve with a glass rod, prepare a NaOH saturated solution under this condition, then add ethanol to dilute, and prepare a 1.0mol / L NaOH / ethanol solution;

[0047] 2) Add the phase transfer catalyst tetrabutylammonium bromide (TBAB) in the prepared NaOH / ethanol solution, add with a dose of 3 mg / ml, stir with a glass rod until the solution is evenly dispersed, and obtain a NaOH / ethanol solution containing TBAB ;

[0048] 3) Add the PVDF powder directly to the above solution, the mass fraction of the added PVDF powder in the solution is 10%, after alkali treatment at a constant temperature of 70°C for 2 hours, first place the obtained solution for stratification, filter the solution, and then Put the solid obtained after filtering the solution into deionized water and soak for 20 hours, then suction filter with a Buchner funnel, put it into deionized water after suction filtration, and repeat it severa...

Embodiment 2

[0053] 1) Weigh a certain amount of solid NaOH, first add water and stir to dissolve with a glass rod, prepare a NaOH saturated solution under this condition, then add ethanol to dilute, and prepare a 1.5mol / L NaOH / ethanol solution;

[0054] 2) Add the phase transfer catalyst tetrabutylammonium bromide (TBAB) in the prepared NaOH / ethanol solution, add with a dose of 3 mg / ml, stir with a glass rod until the solution is evenly dispersed, and obtain a NaOH / ethanol solution containing TBAB ;

[0055] 3) Add PVDF powder directly to the above solution, the mass fraction of the added PVDF powder in the solution is 5%, after alkali treatment at a constant temperature of 70°C for 1 hour, the obtained solution is left to stand for stratification, and the solution is filtered off, and then Put the solid obtained after filtering the solution into deionized water and soak for 14 hours, then suction filter with a Buchner funnel, put it into deionized water after suction filtration, and repe...

Embodiment 3

[0060] 1) Weigh a certain amount of solid NaOH, first add water and stir to dissolve with a glass rod, prepare a NaOH saturated solution under this condition, then add ethanol to dilute, and prepare a 1.0mol / L NaOH / ethanol solution;

[0061] 2) Add the phase transfer catalyst tetrabutylammonium bromide (TBAB) in the prepared NaOH / ethanol solution, add with a dose of 3 mg / ml, stir with a glass rod until the solution is evenly dispersed, and obtain a NaOH / ethanol solution containing TBAB ;

[0062] 3) Add the PVDF powder directly to the above solution, the mass fraction of the added PVDF powder in the solution is 6%, after alkali treatment at a constant temperature of 70°C for 1 hour, first put the obtained solution to stand for stratification, filter the solution, and then Put the solid obtained after filtering the solution into deionized water and soak for 18 hours, then suction filter with a Buchner funnel, put it into deionized water after suction filtration, and repeat it s...

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Abstract

The invention provides a preparation method of a polyvinylidene fluoride grafted p-styrenesulfonic acid proton exchange membrane. The method comprises the following steps of: firstly, adding a phase transfer catalyst into a prepared alkaline alcohol solution to obtain an alkaline alcohol solution containing the phase transfer catalyst; adding polyvinylidene fluoride into the solution and processing to obtain alkaline-treatment polyvinylidene fluoride powder; adding the obtained powder into an organic solvent to obtain an alkaline-treatment polyvinylidene fluoride powder solution; adding a p-styrene sulfonate monomer and an initiator, and reacting in a nitrogen atmosphere; performing ultrasonic oscillation, and putting the product in a polytetrafluoroethylene membrane frame; drying and stripping the membrane; replacing the monovalent cations in the membrane; removing the residual sulfuric acid; and storing the product in the deionized water to obtain the polyvinylidene fluoride grafted p-styrenesulfonic acid proton exchange membrane. Through the method, a proton exchange membrane with high electric conductivity can be prepared, and the electric conductivity is relatively approximate to that of a Nafion membrane; and the preparation method is simple and easy to implement, has relatively low cost and can be applied to large-scale production.

Description

technical field [0001] The invention relates to a hydrogen-oxygen fuel cell proton exchange membrane, in particular to a preparation method of a polyvinylidene fluoride grafted p-styrenesulfonic acid proton exchange membrane. Background technique [0002] Since the 21st century, fuel cell technology has developed rapidly and has been successfully applied in various industries, driving the rapid growth of the world economy and technology. A fuel cell is a power generation device that directly converts the chemical energy present in fuel and oxidant into electrical energy. The fuel cell has the following characteristics: high energy conversion efficiency, it directly converts the chemical energy of the fuel into electrical energy without the combustion process in the middle, so it is not limited by the Carnot cycle. At present, the fuel-to-electricity conversion efficiency of the fuel cell system is 45% to 60%, so the fuel cell can be widely developed and applied. [0003] P...

Claims

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Application Information

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IPC IPC(8): H01M8/10C08J5/22C08L51/00C08F259/08C08F212/14H01M8/1081
CPCY02E60/523Y02E60/522Y02E60/50Y02P70/50
Inventor 任小明胡金星蒋涛张群朝蔡芳昌马宁殷浩张红星
Owner HUBEI UNIV
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