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A kind of preparation method of super absorbent proton exchange membrane

A technology of proton exchange membrane and high water absorption, applied in the field of proton exchange membrane, can solve the problems of low mechanical strength and proton conductivity, etc. high effect

Active Publication Date: 2016-05-18
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found in experimental studies that the superabsorbent proton exchange membranes based on hollow mesoporous silica microspheres and polymer electrolytes prepared by the solution casting method have low mechanical strength and proton conductivity, which cannot meet practical applications. requirements

Method used

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  • A kind of preparation method of super absorbent proton exchange membrane
  • A kind of preparation method of super absorbent proton exchange membrane
  • A kind of preparation method of super absorbent proton exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing a superabsorbent proton exchange membrane, comprising the steps of:

[0039] (1) Stir and mix 1 part of hollow mesoporous silica microspheres and 9 parts of fluorine-type perfluorosulfonic acid polymer in a mixer in a mass ratio of 1:9 to obtain a mixture;

[0040] (2) Add the mixture obtained in step (1) into the extruder hopper, melt and extrude to form a film, the temperature of the casting head is 200°C, the screw speed is 20r / min, and the linear speed of the roller press is 60cm / min;

[0041] (3) putting the film obtained in step (2) into a NaOH solution with a concentration of 0.1 wt% and soaking it for 12 hours at a temperature of 80° C. to obtain a sodium perfluorosulfonic acid film;

[0042] (4) Putting the sodium perfluorosulfonic acid film obtained in step (3) into a concentration of 0.1wt% hydrochloric acid and soaking it for 6 hours, the soaking temperature is 25°C, and then washed 3 times with deionized water to obtain high water abs...

Embodiment 2

[0046] A method for preparing a superabsorbent proton exchange membrane, comprising the steps of:

[0047] (1) Stir and mix 1 part of hollow mesoporous silica microspheres and 30 parts of fluorine-type perfluorosulfonic acid polymer in a mixer in a mass ratio of 1:30 to obtain a mixture;

[0048] (2) Add the mixture obtained in step (1) into the extruder hopper, melt and extrude to form a film, the temperature of the casting head is 190°C, the screw speed is 25r / min, and the linear speed of the roller press is 80cm / min;

[0049] (3) putting the film obtained in step (2) into a NaOH solution with a concentration of 0.5 wt% and soaking it for 8 hours at a temperature of 70° C. to obtain a sodium perfluorosulfonic acid film;

[0050] (4) putting the sodium perfluorosulfonic acid film obtained in step (3) into a concentration of 0.5wt% hydrochloric acid and soaking for 3 hours, the soaking temperature is 25°C, and then washed 3 times with deionized water to obtain high water absor...

Embodiment 3

[0054] A method for preparing a superabsorbent proton exchange membrane, comprising the steps of:

[0055] (1) Stir and mix 1 part of hollow mesoporous silica microspheres and 99 parts of fluorine-type perfluorosulfonic acid polymer in a mixer in a mass ratio of 1:99 to obtain a mixture;

[0056] (2) Add the mixture obtained in step (1) into the extruder hopper, melt and extrude to form a film, the temperature of the casting head is 180°C, the screw speed is 35r / min, and the linear speed of the roller press is 100cm / min;

[0057] (3) putting the film obtained in step (2) into a NaOH solution with a concentration of 1 wt% and soaking it for 6 hours at a temperature of 80° C. to obtain a sodium perfluorosulfonic acid film;

[0058] (4) putting the sodium type perfluorosulfonic acid film obtained in step (3) into the hydrochloric acid with a concentration of 1wt% and soaking for 1 hour, the soaking temperature is 25°C, and then washed 3 times with deionized water to obtain supera...

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Abstract

The invention discloses a preparation method of a superabsorbent proton exchange membrane, which comprises the following steps: (1) preparing hollow mesoporous silica microspheres and fluorine-type perfluorosulfonic acid polymers according to a mass ratio of 1:9-99 Stir and mix to obtain a mixture; (2) Add the mixture obtained in step (1) to an extruder for melt extrusion to form a film. The temperature of the casting head is 180-200°C, the screw speed is 20-35r / min, The linear speed of the press is 60-100 cm / min; (3) putting the film obtained in step (2) into a sodium hydroxide solution with a concentration of 0.1-1 wt% for 4-12 hours, and the soaking temperature is 60-80°C, Obtain a sodium-form perfluorosulfonic acid film; (4) put the sodium-form perfluorosulfonic acid film obtained in step (3) into hydrochloric acid with a concentration of 0.1 to 1 wt % and soak for 1 to 6 hours at a temperature of 20 to 30° C. , and then washed with deionized water to obtain a superabsorbent proton exchange membrane. Compared with the solution casting method, the superabsorbent proton exchange membrane prepared by the present invention has higher electrical conductivity and mechanical strength.

Description

technical field [0001] The invention relates to the technical field of proton exchange membranes, in particular to a preparation method of a highly water-absorbing proton exchange membrane. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has become an ideal energy source for electric vehicles, submarines and various mobile devices due to its advantages of high specific power, high energy conversion efficiency, low temperature start-up, no corrosion, zero pollution, and environmental friendliness. As one of the important components of PEMFC, the proton exchange membrane plays a key role in its performance. [0003] At present, the most widely used proton exchange membrane composition at home and abroad is a copolymer of tetrafluoroethylene monomer and perfluorovinyl ether monomer with sulfonic acid group. For example, the Nafion membrane of Dupont Company is characterized by the excellent thermal stability and chemical stability of the fluorocarbon p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1081C08J7/00
CPCH01M8/1069Y02E60/50
Inventor 章俊良张士林王树华蒋峰景
Owner JUHUA GROUP TECH CENT
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