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Tadpole-shaped sulfonated POSS-containing hybrid polymer synthesized proton exchange membrane and preparation method therefor

A proton exchange membrane and polymer technology, which is applied in the field of proton exchange membrane and preparation of tadpole-type sulfonated POSS-containing hybrid polymer synthesis, can solve the problems of lower water content and lower proton conductivity, and improve the proton conductivity. , good hydrophilicity, excellent thermal stability effect

Inactive Publication Date: 2018-01-09
NORTHWESTERN POLYTECHNICAL UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently 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

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  • Tadpole-shaped sulfonated POSS-containing hybrid polymer synthesized proton exchange membrane and preparation method therefor
  • Tadpole-shaped sulfonated POSS-containing hybrid polymer synthesized proton exchange membrane and preparation method therefor
  • Tadpole-shaped sulfonated POSS-containing hybrid polymer synthesized proton exchange membrane and preparation method therefor

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preparation example Construction

[0030] A method for preparing the tadpole-shaped organic-inorganic hybrid topological polymer with silsesquioxane as the core and methyl methacrylate block polystyrene as the arm and the preparation method of the proton exchange membrane thereof, characterized The steps are as follows:

[0031]Step 1: Mix a certain proportion of monochloropropyl silsesquioxane, pentamethyldivinyltriamine (PMDETA), cuprous chloride (CuCl), methyl methacrylate monomer (MMA) In a three-neck flask, add toluene as a solvent, freeze—vacuumize—pass nitrogen three times to remove the air, then stir under the protection of nitrogen, and react at 100°C~110°C for 12h~24h; after the reaction, use the obtained product Tetrahydrofuran was dissolved to obtain a polymer solution; the polymer solution was passed through a neutral alumina column to remove the catalyst, concentrated and precipitated with anhydrous methanol, and dried in a vacuum oven at 50°C to constant weight to obtain a white solid POSS-PMMA-C...

Embodiment 1

[0036] Step 1: Add 45g of phenyltrimethoxysilane (0.23mol), 250mL of tetrahydrofuran (THF), 5.25g of deionized water (0.29mol) and 4.0g of sodium hydroxide (0.2mol) into a tube equipped with a condenser and a magnetic in a three-necked flask with a stirrer. The reaction mixture was refluxed at 70°C for 5 hours, then cooled to room temperature, and the reaction was continued for 15 hours. After the reaction, the solvent was removed by a rotary evaporator to obtain a white primary product. The initial product was dissolved in tetrahydrofuran and filtered three times to remove insoluble components. After concentration, a white solid was obtained, which was dried under vacuum at 50°C for 24 hours to obtain POSS. Add POSS (10.0g, 8.8mmol), triethylamine (1.3mL, 8.8mmol), and 200mL anhydrous tetrahydrofuran into a three-necked flask respectively, and stir for 1 hour in an ice-water bath with nitrogen gas; Chloropropyltrichlorosilane (2.24 g, 0.56 mmol) in 20 mL of anhydrous THF w...

Embodiment 2

[0042] Step 1: Add 45g of phenyltrimethoxysilane (0.23mol), 250mL of tetrahydrofuran (THF), 5.25g of deionized water (0.29mol) and 4.0g of sodium hydroxide (0.2mol) into a tube equipped with a condenser and a magnetic in a three-necked flask with a stirrer. The reaction mixture was refluxed at 70°C for 5 hours, then cooled to room temperature, and the reaction was continued for 15 hours. After the reaction, the solvent was removed by a rotary evaporator to obtain a white primary product. The initial product was dissolved in tetrahydrofuran and filtered three times to remove insoluble components. After concentration, a white solid was obtained, which was dried under vacuum at 50°C for 24 hours to obtain POSS. Add POSS (10.0g, 8.8mmol), triethylamine (1.3mL, 8.8mmol), and 200mL anhydrous tetrahydrofuran into a three-necked flask respectively, and stir for 1 hour in an ice-water bath with nitrogen gas; Chloropropyltrichlorosilane (2.24 g, 0.56 mmol) in 20 mL of anhydrous THF w...

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Abstract

The invention relates to a tadpole-shaped sulfonated POSS-containing hybrid polymer synthesized proton exchange membrane and a preparation method therefor. By taking mono-functional group-containing <gamma>-chloropropyl polyhedron silsesquioxane (single chloropropyl silsesquioxane) as an initiator, a catalyst, a ligand and an active monomer at a specific proportion are added to a reactor to be synthesized by adopting a two-step atom transfer free group polymerization method; and next, the tadpole-shaped sulfonated POSS-containing hybrid polymer is obtained by adopting a sulfonating mode. According to the designed membrane-forming method, the tadpole-shaped sulfonated POSS-containing hybrid polymer is taken as the raw material, and N, N-dimethylformamide is taken as a solvent to obtain themembrane in a pouring manner. The single-arm-structured and tadpole-shaped organic and inorganic hybrid polymer has high hydrophilia while excellent thermal stability is also ensured by virtue of existence of the POSS core, thereby improving the proton electric conductivity of the proton exchange membrane at a high temperature.

Description

technical field [0001] The invention belongs to a polymer-synthesized proton exchange membrane and a preparation method thereof, and relates to a tadpole-type sulfonated POSS-containing hybrid polymer-synthesized proton-exchange membrane and a preparation method. 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, proton exchange membrane fuel cell has the advantages of high energy density, short start-up time, low operating temperature, zero carbon emission, etc. Applications show great potential for development. Proton exchange membrane 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 and anode, which plays a ...

Claims

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Application Information

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IPC IPC(8): H01M8/1051H01M8/1069H01M8/1072H01M8/1088C08F293/00
CPCY02E60/50Y02P70/50
Inventor 陈芳杨佳宇齐梦斐马晓燕
Owner NORTHWESTERN POLYTECHNICAL UNIV
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