Preparation method of superabsorbent proton exchange membrane

A technology of proton exchange membrane and high water absorption, which is applied in the direction of fuel cell parts, fuel cells, electrical components, etc., can solve the problems of low mechanical strength and proton conductivity, which cannot be satisfied, and achieve proton conductivity and mechanical strength Improvement, weakening effect of hindrance, high proton conductivity and mechanical strength

Active Publication Date: 2014-10-01
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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  • Preparation method of superabsorbent proton exchange membrane
  • Preparation method of superabsorbent proton exchange membrane
  • Preparation method of superabsorbent 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. The preparation method of the superabsorbent proton exchange membrane comprises the following steps: (1) stirring for mixing hollow mesoporous silica microspheres with fluorous perfluorinated sulfonic acid polymers according to a mass ratio of 1 to (9-99) to obtain a mixture; (2) adding the mixture obtained in the step (1) into an extruder for melting and extruding so as to form a membrane under the conditions that the temperature of the head of a membrane casting machine is 180-200 DEG C, the rotation speed of a screw rod is 20-35r/min and the linear speed of a roller press is 60-100cm/min; (3) putting the membrane obtained in the step (2) into 0.1-1wt% sodium hydroxide solution for soaking at the temperature of 60-80 DEG C for 4-12 hours so as to obtain a sodium perfluorinated sulfonic acid membrane; (4) putting the sodium perfluorinated sulfonic acid membrane obtained in the step (3) into 0.1-1wt% hydrochloric acid for soaking at the temperature of 20-30 DEG C for 1-6 hours, then washing the membrane with deionized water so as to obtain the superabsorbent proton exchange membrane. Compared with a membrane prepared by adopting a casting method using the solution, the superabsorbent proton exchange membrane prepared by adopting the method has higher 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 Applications(China)
IPC IPC(8): H01M8/02H01M2/16C08J7/00
CPCY02E60/50H01M8/1069
Inventor 章俊良张士林王树华蒋峰景
Owner JUHUA GROUP TECH CENT
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