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Proton exchange polymer film and preparation method thereof

A polymer membrane, proton exchange technology, applied in the direction of educts, electrical components, circuits, etc., can solve the problems of high cost, cannot be used at high temperature, etc., to achieve low cost, low price, and prevent leakage.

Inactive Publication Date: 2014-07-02
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a novel proton exchange polymer membrane with good performance and its preparation method, to overcome the problems of high cost and inability to use the existing proton exchange polymer membrane at high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 0.2g, 0.3g methacrylonitrile, 0.01g azobisisobutyronitrile, dissolved in methanol, mixed the solution evenly, and reacted at 60°C for 36 hours under the protection of nitrogen, and dissolved the obtained polymer in DMF, Finally, it was precipitated with ethanol, then centrifuged, washed 3 times with ethanol, and dried in a vacuum oven at 60°C. The obtained polymer was dissolved in N-methylpyrrolidone to prepare a 5% solution, and the film was formed by casting Prepare the proton exchange membrane, and finally soak the membrane in 85% phosphoric acid at 80°C for 24 hours, wipe off the phosphoric acid on the surface of the membrane with filter paper, and then vacuum-dry it at 110°C to obtain a proton exchange polymer membrane.

[0023] Tests have shown that the conductivity of the proton exchange polymer membrane obtained in this example at 150°C is 2.03×10 -2 S.cm -1 .

Embodiment 2

[0025] 0.2g, styrene 0.3g, azobisisobutyronitrile 0.01g, mix the solution uniformly, dissolve in methanol, mix the solution uniformly, react at 80°C for 12 hours under the protection of nitrogen, and dissolve the obtained polymer Settled in DMF, then precipitated with ethanol, centrifuged again, washed 3 times with ethanol, dried in a vacuum oven at 60°C, dissolved the obtained polymer in DMSO to prepare a 5% solution, and prepared by casting a film-forming method For the proton exchange membrane, soak the membrane in 85% phosphoric acid at 80°C for 24 hours, wipe off the phosphoric acid on the surface of the membrane with filter paper, and dry it in vacuum at 110°C to obtain a proton exchange polymer membrane.

[0026] Tests have shown that the conductivity of the proton exchange polymer membrane obtained in this example at 150°C is 2.52×10 -2 S.cm -1 .

Embodiment 3

[0028] 0.3g, acrylonitrile 0.2g, azobisisobutyronitrile 0.01g, mix the solution evenly and dissolve in methanol, mix the solution evenly, react at 65°C for 30 hours under the protection of nitrogen, and dissolve the obtained polymer in DMF, then precipitated with ethanol, then centrifuged, washed 3 times with ethanol, dried in a vacuum oven at 60°C, dissolved the obtained polymer in DMSO to prepare a 5% solution, and prepared proton by casting a film-forming method Exchange the membrane, and finally soak the membrane in 85% phosphoric acid at 80°C for 24 hours, wipe off the phosphoric acid on the surface of the membrane with filter paper, and then vacuum-dry it at 110°C to obtain a proton exchange polymer membrane.

[0029] Tests have shown that the conductivity of the proton exchange polymer membrane obtained in this example is 4.22×10 at 150°C -2 S.cm -1 .

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PUM

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Abstract

The invention discloses a proton exchange polymer film and a preparation method thereof. The method comprises the following steps of: mixing a monomer, a polymerized ionic liquid and an initiator in the weight ratio of (20-90):(80-10):(0.3-1), and dissolving into methanol; performing a polymerization reaction under the protection of nitrogen gas; after the reaction is completed, dissolving, precipitating, washing and drying to obtain an ionic polymer; dissolving the polymer into a solvent; preparing a proton exchange polymer film through a casting film forming method; soaking the obtained proton exchange polymer film into 85 percent phosphoric acid at the temperature of 80 DEG C for 24 hours; taking the film out, and wiping phosphoric acid on the surface of the film out; and performing vacuum drying at the temperature of 110 DEG C for 24 hours to obtain a proton exchange polymer film. In the method, a phosphoric acid doping process is performed, and phosphoric acid can be kept in the film, so that the obtained proton exchange polymer film has excellent performance, high thermal stability and high chemical stability, and can be suitable for the working environment of over 80 DEG C.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a fuel cell component and a preparation method thereof, in particular to an anhydrous proton exchange polymer membrane capable of being used at high temperature and a preparation method thereof. Background technique [0002] As a key component of a proton exchange membrane fuel cell, the proton exchange membrane plays a dual role of conducting protons and blocking fuel, and its performance directly affects the performance and service life of the fuel cell. [0003] At present, ionomer membranes represented by Nafion membranes have been widely used because of their excellent chemical stability and high proton conductivity under wet conditions. However, the disadvantages of high cost, high methanol permeability, and reduced proton conductivity at high temperature limit its further application. For this reason, in the prior art, on the one hand, the Nafion membrane is modif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/14C08F224/00C08F220/48C08F212/08C08F220/14C08F220/18C08J5/22C08L25/16C08L37/00C08L33/20C08L25/08C08L33/12C08L33/08H01M8/02H01M2/16
CPCY02E60/50Y02P20/141
Inventor 严锋司志红林本才
Owner SUZHOU UNIV
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