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Modified hyperbranched polymer (HBP), proton exchange membrane prepared by using same and preparation method of proton exchange membrane

A hyperbranched polymer, proton exchange membrane technology, used in electrochemical generators, climate sustainability, final product manufacturing, etc., to solve problems such as low proton conduction rates

Active Publication Date: 2011-03-30
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been proved by experiments that the proton conduction rate of the blend of Nafion and bismaleimide is lower than that of Nafion

Method used

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  • Modified hyperbranched polymer (HBP), proton exchange membrane prepared by using same and preparation method of proton exchange membrane
  • Modified hyperbranched polymer (HBP), proton exchange membrane prepared by using same and preparation method of proton exchange membrane
  • Modified hyperbranched polymer (HBP), proton exchange membrane prepared by using same and preparation method of proton exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] [Example: Manufacturing method of proton exchange membrane]

[0041] The proton exchange membrane manufacturing method proposed in this embodiment mainly forms a hyperbranched polymer by copolymerizing bismaleimide and barbituric acid, and utilizes sodium styrene sulfonate (Sodium4-vinylbenzenesulfonate) to form a hyperbranched polymer. The ends are sulfonated. The steps for producing the proton exchange membrane in the examples are described below.

[0042] Hyperbranched polymers forming a bismaleimide matrix

[0043] Firstly, take an appropriate proportion of bismaleimide and barbituric acid, add γ-butyl lactone, heat to 130°C and react for 4 hours to carry out copolymerization reaction to form a hyperbranched polymer. The structures of bismaleimide and barbituric acid are shown in the aforementioned structural formulas (1) and (2). Wherein, the molar ratio of bismaleimide to barbituric acid is about 10:1 to 1:1.

[0044] In other embodiments of the present inve...

Embodiment 1

[0072] Take 16.967g of BMI (bismaleimide of Formula 3) and 3.3033g of barbituric acid, add 100g of γ-butyl lactone, heat to 130°C and react for 4.5 hours to form a hyperbranched polymer.

[0073]

[0074] Next, take 30 g of Nafion aqueous solution (DE2020CS purchased from DuPont), add 18 g of DMAc solution, heat in a water bath at 60° C., and replace the water and alcohols in the Nafion aqueous solution with DMAc.

[0075] After adding the above-mentioned hyperbranched polymer solution into Nafion's dimethylacetamide solution, it was left standing and heated to 50° C. for 48 hours to form an interpenetrating polymer solution.

[0076] Then add 0.5 parts by weight of sodium styrene sulfonate (Sodium4-vinylbenzenesulfonate) with the following structure to 99.5 parts by weight of the interpenetrating polymer solution, and leave it at room temperature for 24 hours to connect sodium styrene sulfonate to the hyperbranched polymer part of the end, forming an interpenetrating polym...

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Abstract

The invention provides a proton exchange membrane, comprising the following components in parts by weight: 85-90 parts of sulphonating tetrafluoroethylene polymer and 15-10 parts of modified hyperbranched polymer (HBP), wherein the modified HBP comprises the HBP of a bismaleimide matrix, and the tail end of the HBP is sulphonated partially so as to form the modified HBP; and the sulphonating tetrafluoroethylene polymer and the modified HBP are penetrated mutually. The preparation method of the proton exchange membrane of the invention is characterized in that the modified step of the HBP is carried out before or after the interpenetrated macromolecules are formed, that is, the interpenetrated macromolecules can be formed before the modification (sulfonation) of the HBP or can be formed after the modification of the HBP.

Description

technical field [0001] The present invention relates to a kind of modified hyperbranched polymer, and the proton exchange membrane made by applying the modified hyperbranched polymer and its manufacturing method, especially relates to a kind of modified hyperbranched polymer which has dimensional stability and can still be used under low humidity. A proton exchange membrane maintaining a high proton conduction rate and a method of making the same. Background technique [0002] (sulfonated tetrafluoroethylene copolymer, sulfonated tetrafluoroethylene copolymer) is a conductive polymer developed by Dupont in the 1960s. Due to their ionic properties, such compounds are also known as ionomers. The unique ionic properties of Nafion come from the sulfonic acid group grafted at the end of the polytetrafluoroethylene backbone. Due to its excellent thermal stability and mechanical properties, Nafion occupies a place in the field of proton exchange membrane fuel cells (PEMFC). [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16H01M8/10C08L27/22C08L79/08C08G73/12C08J3/24C08J5/22H01M8/1041H01M8/1069H01M8/1088
CPCY02E60/521Y02P70/50Y02E60/50
Inventor 张中良徐雅亭潘金平
Owner IND TECH RES INST
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