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Crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for fuel cell and preparation method thereof

An anion-exchange membrane and cross-linked imidazole-type technology, which is applied in the field of cross-linked imidazole-type anion-exchange membranes for fuel cells and its preparation, can solve the problems of commercial production impact, poor mechanical properties, etc.

Active Publication Date: 2018-06-01
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this will bring some other problems. For example, the higher ion exchange capacity may make the swelling of the polymer more obvious. Therefore, this type of membrane generally has poor mechanical properties, which may cause problems for commercial production. certain influence

Method used

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  • Crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for fuel cell and preparation method thereof
  • Crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for fuel cell and preparation method thereof
  • Crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for fuel cell and preparation method thereof

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[0031] The present invention also provides a method for preparing a cross-linked imidazole-type polyether ether ketone anion exchange membrane for a fuel cell, comprising the following steps:

[0032] Step 1: preparing polyether ether ketone;

[0033] Step 2: performing a bromination substitution reaction on the methyl groups on the polyether ether ketone obtained in step 1 to obtain brominated polyether ether ketone;

[0034] Step 3: adding 1-methylimidazole and 1-vinylimidazole to the brominated polyether ether ketone solution in step 2 to obtain a mixed solution;

[0035] Step 4: Pour the mixed solution in Step 3 into a glass plate to dry, and the paved membrane is the cross-linked imidazole-type polyether ether ketone anion exchange membrane for fuel cells.

[0036] According to the present invention, the preparation method of the polyether ether ketone is preferably: adding methyl hydroquinone, 4,4-difluorobenzophenone, a salt-forming agent and a solvent into a reaction ...

Embodiment 1

[0042] The preparation of embodiment 1 polyether ether ketone

[0043] 2.483g methyl hydroquinone, 4.364g 4,4-difluorobenzophenone, 3.036g K 2 CO 3and 15ml of toluene were added into the round-bottomed flask respectively, and then the purposes of the three ports were to feed nitrogen, stir and insert the condenser successively. Heat the mixture from room temperature to 130°C under a nitrogen atmosphere, and continue to stir for 4 hours. The purpose is to completely remove the water in the system, then raise the temperature to 170°C, and continue the reaction for 5 hours. When the viscosity of the solution increases significantly, pour the solution into water, the gray polymer formed was washed 5 times with water and dried to obtain polyether ether ketone. The prepared polyetheretherketone NMR spectrum is as follows figure 1 shown.

Embodiment 2

[0044] Preparation of polyether ether ketone after embodiment 2 bromination

[0045] 1g of PEEK prepared in Example 1 and 25ml of 1,1,2,2-tetrachloroethane were respectively added to a 100ml round bottom flask, wherein the two sides of the flask were nitrogen inlet and outlet, and the middle one was used for mechanical stirring , when the polymer is completely dissolved, add 1.18g NBS and 0.08g BPO to the three-neck flask, heat the mixture under nitrogen protection, raise from normal temperature to 78°C, and react under this condition for 5h, and cool the solution to room temperature, Then pour it into ethanol under stirring. The yellow precipitate is brominated polyether ether ketone (BPEEK). Wash the precipitate 4 times with ethanol and dry it in an oven at 40-60°C for 10-12h. The prepared brominated polyetheretherketone NMR spectrum is as follows figure 1 shown.

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Abstract

The invention provides a crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for a fuel cell, and a preparation method thereof, which belong to the fields of high polymer chemistry and anion-exchange membrane fuel cells. A structural formula of the anion-exchange membrane is as shown in a formula I. The invention also provides the preparation method of the crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for the fuel cell. The method comprises the steps of firstly preparing polyether-ether-ketone; then carrying out bromination substitution reaction on methyl on the polyether-ether-ketone, and obtaining brominated polyether-ether-ketone; adding 1-methylimidazole and 1-vinyl imidazole into a brominated polyether-ether-ketone solution, and obtaining a mixed solution; finally pouring the mixed solution onto a glass plate, drying, and obtaining a paved membrane which is the crosslinking imidazole type polyether-ether-ketone anion-exchange membrane for the fuel cell. The anion-exchange membrane provided by the invention has high ionic conductance, high alkali resistance, higher mechanical performance and higher relative selectivity; the preparation method provided by the invention is simple and low in cost.

Description

technical field [0001] The invention belongs to the fields of polymer chemistry and anion-exchange membrane fuel cells, and in particular relates to a cross-linked imidazole-type anion-exchange membrane for fuel cells and a preparation method thereof. Background technique [0002] Anion exchange membrane (AEM) is the core component of alkaline fuel cell. Compared with the proton exchange membrane, due to the OH - The diffusion efficiency of H + The diffusion efficiency of the film is 4 times smaller, so the OH in the film - The concentration of H + The same effect as the acid film can be achieved when the concentration is 4 times that of the acid film. This means that, for alkaline PEMs, increasing the ion exchange capacity is an inevitable requirement. However, this will bring some other problems. For example, the higher ion exchange capacity may make the swelling of the polymer more obvious. Therefore, this type of membrane generally has poor mechanical properties, wh...

Claims

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Application Information

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IPC IPC(8): H01M8/1025H01M8/1039H01M8/1067H01M8/1069H01M8/1072C08G65/48C08G65/40
CPCC08G65/4012C08G65/48H01M8/1025H01M8/1039H01M8/1067H01M8/1069H01M8/1072Y02E60/50Y02P70/50
Inventor 王哲李名卉徐晶美罗雪妍臧欢王蕾田雪
Owner CHANGCHUN UNIV OF TECH
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