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Fiber reinforced inorganic doping cross-linking fluorinion-containing exchange film

An ion-exchange membrane, fiber-reinforced technology, applied in the field of functional polymer composite materials, can solve the problem of not simultaneously improving the dimensional stability of the membrane, conductivity and other problems

Active Publication Date: 2009-01-21
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, the above patents only improved the performance of one aspect of the membrane, and did not simultaneously improve the dimensional stability of the membrane and the conductivity under high temperature and low humidity.

Method used

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  • Fiber reinforced inorganic doping cross-linking fluorinion-containing exchange film
  • Fiber reinforced inorganic doping cross-linking fluorinion-containing exchange film
  • Fiber reinforced inorganic doping cross-linking fluorinion-containing exchange film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Example 1: The repeating unit is

[0091]

[0092] Polymer with EW=1000 and Zr(HPO 4 ) 2 (Zr(HPO 4 ) 2 The mass ratio with the resin is 3: 100) to make 5wt% propanol aqueous solution, then configure the perfluoromalonyl peroxide DMF solution with a concentration of 5%, add polytetrafluoroethylene fibers (diameter 1 μm, length 50 μm, The mass ratio of polymer to polymer is 7:100), dispersed and cast into a horizontally placed polytetrafluoroethylene mold. After vacuum drying at 80°C for 12 hours, the film was peeled off. 2 SO 4 The solution was boiled for 1 hour and washed with deionized water. After heat treatment, the membrane is sequentially treated with NaOH solution and sulfuric acid solution to obtain a fiber-reinforced single-layer perfluorosulfonic acid cross-linked as the (I) doped ion membrane.

Embodiment 2

[0093] Example 2: The repeating unit is

[0094]

[0095] Polymer with EW=800 and particle size 0.03 μm SiO 2 (SiO 2 The mass ratio of perfluorosulfonic acid resin is 5:100), alkali-free glass fiber (diameter 0.05μm, length 5um, mass ratio of alkali-free glass fiber and perfluorosulfonic acid resin is 1:40), and extruded to obtain thickness for a 30 μm film. Soak in NH 4 Cl in DMF for 5 hours. The soaked membrane was then placed in triethylamine at 200°C for 2 hours to obtain a crosslinked membrane. The membrane is sequentially treated with KOH solution and hydrochloric acid solution to obtain an ion-exchange membrane with a cross-linked structure of (11).

Embodiment 3

[0096] Embodiment 3: the repeating unit is

[0097]

[0098] Polymer with EW=1200, polytetrafluoroethylene fiber modified by silicic acid (diameter 0.2 μm, length 80 μm, weight ratio to polymer is 7:100), tetraphenyl tin extruded by twin-screw extruder 50 μm film, and then heat the film to 230° C. for 10 hours to obtain a film with the crosslinked structure (V). The membrane was sequentially treated with LiOH and nitric acid solution to obtain a cross-linked ion membrane.

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Abstract

The invention relates to a fiber reinforcement inorganic substance doping crosslinking fluorine-contained iron exchange membrane and a preparation method thereof, which belong to the field of a functional macromolecular composite material. The fluorine-contained ion exchange membrane has cross linked mesh structures, reinforced fibers and doped inorganic substance. The ion exchange membrane prepared by the invention has higher high-temperature electric conductivity, dimensional stability and good mechanical strength.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and relates to a fiber-reinforced inorganic matter-doped cross-linked fluorine-containing ion 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] Although the current perfluorosulfonic acid proton exchange membrane has been used for many years, there are still some shortcomings that cannot meet the requirements of commercialization, such as low proton conductivity at high temperature, poor dimensional stability, and low mechan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22H01M8/10H01M2/16H01M8/1018H01M8/1041H01M8/1069
CPCY02E60/523Y02E60/50
Inventor 张永明王军唐军柯王汉利
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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