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Star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and preparation method thereof

A technology of silsesquioxane and sulfonated styrene, used in electrochemical generators, fuel cells, electrical components, etc. The effect of hydrophilicity and superior thermal stability

Inactive Publication Date: 2013-06-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used proton exchange membrane (PEM) is the Nafion membrane produced by DuPont. When the operating temperature is higher than 80°C or the relative humidity is lower than 50%, the water content of the membrane will decrease, resulting in a significant drop in proton conductivity. largely limits its application

Method used

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  • Star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and preparation method thereof
  • Star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and preparation method thereof
  • Star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Step 1: Add 600ml of anhydrous methanol, 24ml of concentrated hydrochloric acid, and 30ml of γ-chloropropyltrimethoxysilane to a 1000ml three-necked flask in sequence, and continuously stir the reaction at 40°C for 5 days to obtain a white solid. Rinse several times, and dry in a vacuum oven at 50°C for 48 hours. Synthetic process such as figure 1 shown;

[0028] Step 2: Mix the measured octachloropropylsilsesquioxane (0.2g), pentamethyldivinyltriamine (0.15ml), cuprous chloride (0.015g), methyl methacrylate (20ml ) and toluene (20ml) were respectively added in a 100ml three-neck flask equipped with a condenser tube and a magnetic stirrer, stirred under nitrogen protection, the temperature was raised to 70°C, and then gradually increased to 110°C, and reacted to The viscosity of the system increased significantly. Dissolve the product in the container with a large amount of tetrahydrofuran to obtain a polymer solution. Pass the solution through a neutral alumina c...

Embodiment 2

[0043] (1) Step 1: Add 600ml of anhydrous methanol, 24ml of concentrated hydrochloric acid, and 30ml of γ-chloropropyltrimethoxysilane to a 1000ml three-necked flask in sequence, and continuously stir the reaction at 40°C for 5 days to obtain a white solid. Rinse several times, and dry in a vacuum oven at 50°C for 48 hours. Synthetic process such as figure 1 shown;

[0044] Step 2: Mix the measured octachloropropylsilsesquioxane (0.4g), pentamethyldivinyltriamine (0.30ml), cuprous chloride (0.030g), methyl methacrylate (40ml ) and toluene (40ml) were respectively added in a 250ml three-neck flask equipped with a condenser tube and a magnetic stirrer, stirred under nitrogen protection, the temperature was raised to 70°C, and then gradually increased to 110°C, and reacted to The viscosity of the system increased significantly. Dissolve the product in the container with a large amount of tetrahydrofuran to obtain a polymer solution. Pass the solution through a neutral alumina c...

Embodiment 3

[0059] (1) Step 1: Add 600ml of anhydrous methanol, 24ml of concentrated hydrochloric acid, and 30ml of γ-chloropropyltrimethoxysilane to a 1000ml three-necked flask in sequence, and continuously stir the reaction at 40°C for 5 days to obtain a white solid. Rinse several times, and dry in a vacuum oven at 50°C for 48 hours. Synthetic process such as figure 1 shown;

[0060] Step 2: Mix the measured octachloropropylsilsesquioxane (0.2g), pentamethyldivinyltriamine (0.15ml), cuprous chloride (0.015g), methyl methacrylate (20ml ) and toluene (20ml) were respectively added in a 100ml three-neck flask equipped with a condenser tube and a magnetic stirrer, stirred under nitrogen protection, the temperature was raised to 70°C, and then gradually increased to 110°C, and reacted to The viscosity of the system increased significantly. Dissolve the product in the container with a large amount of tetrahydrofuran to obtain a polymer solution. Pass the solution through a neutral alumina c...

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Abstract

The invention relates to a star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and a preparation method thereof. The star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer is a star hybrid macromolecule which adopts the silsesquioxane as a core and grafted acrylic ester segmented styrene as an arm. The synthesis method of the star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer comprises the following steps of: synthesizing star silsesquioxane-grafted acrylic ester-styrene segmented copolymer by adopting silsesquioxane containing active chlorine as an initiator, selecting several types of acrylic ester, styrene and the like as comonomer and adopting cuprous chloride / pentamethyl divinyl triamine as a catalytic system through a two-step atom transfer free radical polymerization method; obtaining star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer through vitriolization; and obtaining star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer macromolecules of different structures by controlling the length of each POSS (Polyhedral Oligomeric Silsesquioxane) star arm, i.e., the constitution and the length of each block, so that the performances of the star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and the proton exchange membrane thereof are adjusted.

Description

technical field [0001] The invention relates to a star-shaped silsesquioxane grafted acrylate-sulfonated styrene block copolymer and a preparation method thereof, and a star-shaped silsesquioxane grafted acrylate-sulfonated styrene block copolymer A method for the preparation of proton exchange membranes. Background technique [0002] Due to the characteristics of high energy conversion rate and low carbon emission, fuel cell equipment relying on hydrogen energy has gradually become one of the most potential future clean electric power sources. As a new type of electric energy, polymer electrolyte fuel cells have the advantages of high energy density, short start-up time, low operating temperature, and zero carbon emissions. shows great potential for development. Polymer electrolyte fuel cells are mainly composed of three parts: anode, cathode and proton exchange membrane. The proton exchange membrane mainly plays the role of conducting protons and isolating the cathode a...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F212/08C08F220/14C08F220/18C08F8/36C08J5/22H01M8/02H01M8/1039H01M8/1072H01M8/1081
CPCY02E60/50
Inventor 陈芳马晓燕潘龙尚蓓蓉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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