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Sulfonated perfluorocyclobutyl polyarylether polymers as well as preparation method and application thereof

A technology of sulfonated perfluorocyclobutyl polyarylether and perfluorocyclobutyl polyarylether, applied in the field of sulfonated perfluorocyclobutyl polyarylether polymer and its preparation, can solve the problem of low proton conductivity problem, to achieve the effect of simple preparation method, low cost and easy access to raw materials

Active Publication Date: 2015-01-14
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the reported sulfonated side-chain type aromatic polymer membranes have improved dimensional stability, the proton conductivity is generally low

Method used

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  • Sulfonated perfluorocyclobutyl polyarylether polymers as well as preparation method and application thereof
  • Sulfonated perfluorocyclobutyl polyarylether polymers as well as preparation method and application thereof
  • Sulfonated perfluorocyclobutyl polyarylether polymers as well as preparation method and application thereof

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Embodiment 1

[0049] The present invention can be further understood through the following examples, but the scope of the present invention is not limited.

[0050] 1) Preparation of intermediate compound 1:

[0051] Add 5-methoxyresorcinol (7.0g, 0.05mol) and dimethyl sulfoxide (200mL) into a 500mL three-necked flask, and stir to dissolve the quinone; depressurize with an oil pump for 30min, and then inject nitrogen into the solution Bubble in the solution for 30min to remove the oxygen in the solution; under nitrogen protection, add cesium carbonate (48.9g, 0.15mol); after bubbling in the solution with nitrogen for 30min, add 1,2-dibromotetrafluoroethane (38.9 g, 0.15mol); warming up to 50°C, stirring for 2 days; stop heating, transfer the reaction mixture to a 1L beaker, after the system was cooled to room temperature, add water (200mL), stir for 10min, then add dichloromethane ( 100mL), the organic phase was separated, and the organic phase was washed with water (50mL×3); the combined ...

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Abstract

The invention discloses sulfonated perfluorocyclobutyl polyarylether polymers as well as a preparation method and application thereof, belonging to the technical field of fuel cells. The preparation method of sulfonated perfluorocyclobutyl polyarylether polymers comprises the following steps: preparing a trifluorovinyl aryl ether monomer containing methoxy by taking different methoxy aromatic dihydric phenols and 1,2-dibromotetrafluoroethane as raw materials; obtaining perfluorocyclobutyl polyarylether polymer containing methoxy by utilizing (2phi+2phi) thermal cyclization polymerization; reacting the perfluorocyclobutyl polyarylether polymer with boron tribromide so as to remove a protecting group methyl to prepare perfluorocyclobutyl polyarylether polymers with different hydroxyl contents; introducing an sulfonation lateral group by adopting a grafting method to obtain the sulfonated perfluorocyclobutyl polyarylether polymers which are used for preparing a proton exchange membrane. A 5% weight loss temperature of the obtained sulfonated perfluorocyclobutyl polyarylether polymers can be over 217 DEG C. The sulfonated perfluorocyclobutyl polyarylether polymers have the advantages of low water absorption, low swelling rate, high proton conductivity, and can be used as proton exchange membrane material of a fuel cell.

Description

technical field [0001] The invention belongs to the fields of polymer chemistry and proton exchange membrane fuel cells, and in particular relates to a sulfonated perfluorocyclobutyl polyarylether polymer and its preparation method and application. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has the advantages of high power density, high energy conversion efficiency, low temperature start-up, and environmental friendliness. It has broad application prospects in aerospace, military, mobile communication equipment, transportation and other fields. Proton exchange membrane (PEM) is the core component of PEMFC. It is not only a diaphragm material, but also a substrate for electrolytes and electrocatalysts. It can also be used as a proton carrier to complete the transfer of protons. At present, the most widely used commercially is the product produced by DuPont. However, its further application is limited due to its relatively high price, high metha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48C08G65/40C08L71/10C08J5/22H01M8/10H01M8/02
CPCY02E60/50
Inventor 朱园勤洪将剑闭丽萍李世宁黄祖强李光华
Owner GUANGXI UNIV
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