Doped crosslinking chemical stable ion exchange membrane and preparation method thereof

A technology of ion exchange membrane and exchange resin, which is applied in the field of functional polymer composite materials, and can solve the problems of reduced membrane strength and decreased equivalent value of perfluoropolymers, etc.

Active Publication Date: 2010-12-29
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

Generally speaking, when the ion exchange capacity increases, the equivalent value of the perfluoropolymer decreases (the equivalent value EW value decreases, the ion exchange capacity increases IEC=1000 / EW), and the strength of the membrane also decreases

Method used

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  • Doped crosslinking chemical stable ion exchange membrane and preparation method thereof
  • Doped crosslinking chemical stable ion exchange membrane and preparation method thereof
  • Doped crosslinking chemical stable ion exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Convert the repeating unit to

[0096]

[0097] polymer resin (EW=1200) and Zr(HPO 4 ) 2 Mix by 100:5 (mass ratio), then add a small amount of perfluoromalonyl peroxide and Ce 2 o 3 Powder (accounting for 0.1% of the mass of the resin), hot-pressed to form a film, and then put the film in H2O with a molar concentration of 0.5M 2 SO 4 The solution was boiled for 1 hour and washed with deionized water. After heat treatment, the membrane was treated with alkali solution and acid solution in turn to obtain the free radical degradation substance Ce 2 o 3 Modified perfluorosulfonic acid-doped cross-linked chemically stable ionic membrane with a thickness of 50 μm.

Embodiment 2

[0099] The polymer tree in Example 1, 1,2-diiodotetrafluoroethane, SiO 2 (particle size is 0.03μm, mass ratio to resin is 15:100), perfluorosuberoyl peroxide and Mn(OH) 2 Powder (Mn(OH) 2 The addition amount is 1.5% of the mass of the resin) after being fully mixed, heat-treated at 100° C. for 45 minutes, and then melt-extruded to obtain a film with a thickness of 100 μm. Finally, the membrane is sequentially treated with alkaline solution and acid solution to obtain a perfluorosulfonic acid cross-linked doped ion membrane modified by a free radical scavenger Mn ion.

Embodiment 3

[0101] The polymer resin of embodiment 1, H 3 PW 12 o 40 According to the ratio of mass ratio 100: 1, the polymer resin ethylene glycol solution that the mass concentration is 7% is made, then manganese nitrate (III) is added in the solution, the quality of manganese nitrate accounts for 0.05% of the resin mass, and the Method A film with a thickness of 30 μm was prepared at 170° C. for 60 minutes. Then the membrane is cross-linked by 50KGy radiation to obtain a perfluorosulfonic acid cross-linked doped ion membrane modified by a free radical scavenger Mn ion.

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Abstract

The invention relates to a doped crosslinking chemical stable ion exchange membrane, which belongs to the field of functional polymer composite materials. The doped crosslinking chemical stable ion exchange membrane is a perfluorinated ion exchange membrane which is formed by taking perfluorinated ion exchange resin with crosslinking sites as film-forming resin and simultaneously doping an inorganic substance with a water holding function or a proton conduction assisting function and a substance with a function of eliminating free radicals into the film-forming resin, so the chemical stability of the improved ion exchange membrane is greatly improved.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and relates to a perfluorinated ion-exchange membrane with a cross-linked structure and doped with auxiliary proton-conducting substances and free radical degradation substances 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 currently used perfluorosulfonic acid proton exchange membrane has good proton conductivity and chemical stability at relatively low temperature (such as 80° C.) and high humidity. However, they also have many def...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/32H01M8/02H01M2/16C08L27/18C08K3/32C08K5/14C08K3/26C08K3/22C08K3/24C08K3/28H01M8/1027H01M8/1039H01M8/1046H01M8/1069
CPCY02E60/50Y02E60/12
Inventor 唐军柯张永明张恒王军
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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