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High polymer-modified metal organic framework material composite membrane, and preparation and application thereof

A metal-organic framework and polymer technology, applied in fuel cells, fuel cell components, solid electrolyte fuel cells, etc., can solve the problem of low proton conductivity and achieve simple preparation process, controllable structure, and uniform dispersion Effect

Inactive Publication Date: 2014-09-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low proton conductivity of the membrane is still one of the bottlenecks restricting the application.

Method used

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  • High polymer-modified metal organic framework material composite membrane, and preparation and application thereof
  • High polymer-modified metal organic framework material composite membrane, and preparation and application thereof
  • High polymer-modified metal organic framework material composite membrane, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix terephthalic acid, chromium nitrate nonahydrate, hydrofluoric acid, and water in a molar ratio of 1:1:1:265 at 220 o C, under the corresponding saturated vapor pressure for 8h, with 15 o C / min rate to cool down until 40 o C, centrifugal washing, 60 o C under vacuum for 24 h to obtain a metal-organic framework material named MIL101. Weigh 1.5 g metal organic framework material into a 100 mL round bottom flask, add 90 mL nitromethane, then add 0.75 mL concentrated sulfuric acid, 2.71 mL trifluoromethanesulfonic anhydride, 30 o C was reacted for 1 h, and the metal-organic framework material modified with sulfonic acid was obtained after centrifugation and washing.

[0022] Weighed 0.015 g of metal-organic framework material modified with sulfonic acid and added it to 6 mL of nitrogen-nitrogen dimethylformamide. After dispersing for 8 h, 0.6 g of sulfonated polyether ether ketone was added to the above solution and stirred for 24 h. After degassing, pour the casting...

Embodiment 2

[0024] The metal organic framework material modified with sulfonic acid was prepared according to the method in Example 1. Weighed 0.030 g of metal-organic framework material modified with sulfonic acid and added it to 6 mL of nitrogen-nitrogen dimethylformamide. After dispersing for 8 h, 0.6 g of sulfonated polyether ether ketone was added to the above solution and stirred for 24 h. After degassing, pour the casting solution on a clean glass plate and place it in an oven for 60 o C for 12 h, then heated to 80 o C drying for 12 h, and finally after 120 o After C annealing treatment, the membrane was removed and placed in 2 M sulfuric acid for 24 h, and then washed repeatedly with deionized water until neutral. Finally wet the film at 60 o C and vacuum-dried for 12 h to obtain a sulfonated polyetheretherketone-metal-organic framework composite membrane (membrane 2).

Embodiment 3

[0026] The metal organic framework material modified with sulfonic acid was prepared according to the method in Example 1. Weighed 0.0450 g of metal-organic framework material modified with sulfonic acid and added it to 6 mL of nitrogen-nitrogen dimethylformamide. After dispersing for 8 h, 0.6 g of sulfonated polyether ether ketone was added to the above solution and stirred for 24 h. After degassing, pour the casting solution on a clean glass plate and place it in an oven for 60 o C for 12 h, then heated to 80 oC drying for 12 h, and finally after 120 o After C annealing treatment, the membrane was removed and placed in 2 M sulfuric acid for 24 h, and then washed repeatedly with deionized water until neutral. Finally wet the film at 60 o C and vacuum-dried for 12 h to obtain a sulfonated polyetheretherketone-metal-organic framework composite membrane (membrane 3).

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PUM

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Abstract

The invention relates to a high polymer-modified metal organic framework material composite membrane and a preparation method and application thereof. A preparation method for a metal organic framework material comprises a step of subjecting terephthalic acid, chromium nitrate nonahydrate, hydrofluoric acid and water to a reaction and a step of carrying out modification by using trifluoromethanesulfonic anhydride and concentrated sulfuric acid. The prepared modified metal organic framework material is dispersed in a high polymer solution so as to obtain a membrane casting solution; the membrane casting solution is successively subjected to filtering, standing and defoaming and then is used to prepare a membrane through tape casting; and drying, quenching, acidifying with a sulfur acid solution, washing and drying are successively carried out so as to obtain the high polymer-modified metal organic framework material composite membrane. The composite membrane prepared in the invention has high proton conductivity and is directly applicable to a fuel cell.

Description

technical field [0001] The invention relates to a composite membrane, in particular to a polymer-modified metal organic framework material composite membrane and its preparation and application, and belongs to the technical field of fuel cell proton exchange membranes. Background technique [0002] Proton exchange membrane fuel cell is a representative of new energy. Proton exchange membrane is one of the core components of proton exchange membrane fuel cell. Enhancing the proton conductivity of the membrane is the key to improving the overall performance of the battery. Sulfonated polyether ether ketone has become one of the most concerned proton exchange membrane materials because of its low cost, good thermal stability, mechanical properties and alcohol resistance. However, the low proton conductivity of the membrane is still one of the bottlenecks restricting the application. Proton transfer is generally divided into two mechanisms: one is the transport mechanism, that ...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M8/10C08J5/22H01M8/1011H01M8/1018H01M8/1041H01M8/1069
CPCY02E60/523H01M8/1069Y02E60/50
Inventor 姜忠义李震何光伟李宗雨吴洪
Owner TIANJIN UNIV
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