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Fiber reinforced inorganic doped proton exchange film containing fluorine

A proton exchange membrane and fiber-reinforced technology, applied in the field of functional polymer composite materials, can solve problems such as time-consuming and non-continuous production

Inactive Publication Date: 2008-10-22
SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot be continuously produced due to the time-consuming transformation process, and at the same time, no functional inorganic substances are added to improve the conductivity

Method used

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  • Fiber reinforced inorganic doped proton exchange film containing fluorine
  • Fiber reinforced inorganic doped proton exchange film containing fluorine
  • Fiber reinforced inorganic doped proton exchange film containing fluorine

Examples

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preparation example Construction

[0051] The preparation method of the fiber-reinforced inorganic material doped proton exchange membrane of the present invention comprises the following steps:

[0052] (1) dissolving the fluorine-containing sulfonic acid resin shown in general formula (I) with a polar solvent to form a fluorine-containing sulfonic acid resin solution;

[0053] (2) dispersing the inorganic matter in the fluorine-containing sulfonic acid resin solution prepared in step (1);

[0054] (3) Disperse the fibers in the polar solvent used in step (1), and mix them by ultrasonic or high-speed stirring to obtain a fiber dispersion;

[0055](4) Mix the fiber dispersion prepared in step (3) with the solution in step (2) to form a film by casting, casting, screen printing, spraying or dipping, and heat the film at 50-300°C, preferably 80-200° C., more preferably 120-190° C., heat treatment for 0.5-600 minutes, and peeled off to obtain a fiber-reinforced inorganic substance-doped fluorine-containing proton...

Embodiment 1

[0060] In general formula I, n=13, m=2, X=F, Y=F perfluorosulfonic acid resin was dissolved in N-methylpyrrolidone to prepare a solution with a solid content of 35%. Add 0.007μm ZrO 2 powder. Quartz fiber (ZrO) with a diameter of 0.01 μm and a length of 0.08 μm 2 The content is 0.5%, and the quartz fiber is 5%) dispersed in N-methylpyrrolidone, adding the dispersant sodium polyphosphate and vigorously stirring to disperse the fiber into the solvent. Solvent containing fibers and resin and ZrO 2 The powder dispersions were mixed, and heat-treated at 180° C. for 10 minutes by solution casting to prepare a fiber-reinforced inorganic-doped perfluorosulfonic acid proton exchange membrane with a thickness of 25 μm. Tensile strength: 24MPa, conductance: 133mS / cm.

Embodiment 2

[0062] In general formula I, n=7, m=3, X=H, Y=H perfluorosulfonic acid resin was dissolved in methyl formamide to prepare a solution with a solid content of 33%. Add 0.04μm Zr 3 (PO 4 ) 4 powder. Aluminum silicate fibers (Zr 3 (PO 4 ) 4 The content is 3%, the aluminum silicate fiber is 7%) dispersed in methyl formamide, and the dispersant potassium polyphosphate is added to vigorously stir to disperse the fiber into the solvent. Solvent containing fibers and resin and Zr 3 (PO 4 ) 4 The powder dispersions were mixed, and heat-treated at 160° C. for 30 minutes by solution casting to prepare a fiber-reinforced inorganic-doped perfluorosulfonic acid proton exchange membrane with a thickness of 38 μm. Tensile strength: 24MPa, conductance: 135mS / cm.

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Abstract

The invention relates to a fibre reinforced inorganics exchange membrane doped with fluorine-containing protons and a method for making the same. The invention belongs to the functional polymer composite material field. The exchange membrane consists of fluorine-containing sulfonic acid resin, reinforced fibre and inorganics. The method comprises the following steps that: the fluorine-containing sulfonic acid resin is dissolved by a polar solvent to form a fluorine-containing sulfonic acid resin solution; the inorganics are scattered in the prepared fluorine-containing sulfonic acid resin solution; the fibre is scattered in the polar solvent and stirred with ultrasonic or at a high speed to obtain a fibre dispersion; the fibre dispersion and the fluorine-containing sulfonic acid resin solution with the scattered inorganics are mixed and form a membrane by adopting the processes of cast soldering, flow casting, silk screen printing, painting or dipping; and the membrane is subject to thermal treatment at a temperature of between 50 and 300 DEG C for 0.5 to 600 minutes and is stripped, so the fibre reinforced inorganics exchange membrane doped with the fluorine-containing protons is obtained. The fluorine-containing sulfonic acid membrane prepared by the method has good water-retaining performance and high proton conductivity and mechanical performance.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and relates to a doping-reinforced proton-exchange membrane, in particular to a fiber-reinforced water-retaining nano-particle doped fluorine-containing sulfonic acid proton-exchange membrane and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell is a power generation device that directly converts chemical energy into electrical energy by electrochemical means, and is considered to be the preferred clean and efficient power generation technology in the 21st century. Proton exchange membrane (proton exchange membrane, PEM) is the key material of proton exchange membrane fuel cell (proton exchange membrane fuel cell, PEMFC). [0003] The current perfluorosulfonic acid proton exchange membrane has good proton conductivity and chemical stability at lower temperature (80°C) and higher humidity. However, they also have many disadvantages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16B01D71/00C08J5/22H01M8/0202H01M8/1018H01M8/1039H01M8/1046
CPCY02E60/12Y02E60/523Y02E60/50Y02P70/50
Inventor 张永明张恒唐军柯夏俊
Owner SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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