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SiO2@sPS-modified polymer hybrid proton exchange membrane and preparation method thereof

A proton exchange membrane and polymer technology, which is applied in the field of polymer hybrid proton exchange membrane and its preparation, can solve problems such as the decline of proton conductivity, and achieve the effects of easy batch production, simple operation process and warm preparation conditions.

Inactive Publication Date: 2015-09-30
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, under low humidity and / or high temperature conditions (generally greater than 90°C), pure proton exchange membranes will have a sharp drop in proton conductivity due to severe water loss

Method used

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  • SiO2@sPS-modified polymer hybrid proton exchange membrane and preparation method thereof
  • SiO2@sPS-modified polymer hybrid proton exchange membrane and preparation method thereof
  • SiO2@sPS-modified polymer hybrid proton exchange membrane and preparation method thereof

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Embodiment 1

[0027] Configure 232.5 mL of a mixed solution of water and ethanol at a volume ratio of 1:2.3; then, add 17.5 mL of commercially available ammonia solution and mix well; then, add 20 mL of tetraethyl orthosilicate (TEOS ), stirred at 400rpm, and reacted at 30°C for 1h; finally, after centrifugation-absolute ethanol washing-drying and other steps, 5.2g of silica pellets (SiO 2 ).

[0028] Prepare SiO with a mass volume ratio of 2‰ 2 / ethanol dispersion 250mL, and ultrasonic to help disperse; then, add 15mL 3-(trimethoxysilyl)propyl-2-methyl-2-acrylate (MPS), under stirring, at 40℃ The reaction was carried out for 24 hours; finally, after centrifugation-absolute ethanol washing-drying and other steps, the surface-modified silica pellets with carbon-carbon double bonds ("SiO 2 -=”).

[0029] Preparation of "SiO2" with a mass volume ratio of 1.04% 2 -=” / water dispersion 25mL, and ultrasonic to help disperse; pass nitrogen into the dispersion (N 2 ) 1h later, add 1.6mL styrene...

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Abstract

The invention belongs to the technical field of membranes, and particularly relates to a SiO2@sPS-modified polymer hybrid proton exchange membrane and a preparation method thereof. The proton conductivity of the SiO2@sPS-modified polymer hybrid proton exchange membrane prepared by uniformly dispersing SiO2@sPS in a polymer matrix is greatly higher than that of the pore polymer proton exchange membrane. Besides, the silicon sphere kernel is etched to obtain the sulfonated hollow polystyrene (h-sPS) / polymer hybrid proton exchange membrane to further enhance the water retaining capacity of the hybrid proton exchange membrane, so that the proton conductivity of the h-sPS / polymer hybrid proton exchange membrane is further enhanced; and meanwhile, the fuel permeability of the hybrid proton exchange membrane is further inhibited. Therefore, the h-sPS / polymer hybrid proton exchange membrane has higher selectivity. The method has the advantages of simple operational process, mild preparation conditions and lower production cost, can easily implement mass large-scale production, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of membrane technology, in particular to a sulfonated silicon sphere polystyrene core-shell compound (SiO 2 sPS) modified polymer hybrid proton exchange membrane and its preparation method. Background technique [0002] Fuel cells have excellent properties such as high efficiency and no pollution. Today, they have become one of the most competitive alternative power sources for internal combustion engines. Among them, as the sixth generation of fuel cells, direct methanol fuel cells have attracted extensive attention, which has additional advantages such as high energy density, mild operating conditions, long service life and no need for fuel pretreatment devices. Among them, the proton exchange membrane is one of the core components of the direct methanol fuel cell. On the one hand, it provides a pathway for the migration and transport of protons and hydrated protons; on the other hand, it separates the fuel (i.e.,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08F292/00C08F8/36H01M8/02
CPCY02E60/50Y02P70/50
Inventor 冯凯汤蓓蓓武培怡
Owner FUDAN UNIV
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