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Sulfonated oxidized graphene-silicon dioxide composition/polymer hybridized proton exchange membrane and preparation method thereof

A technology of proton exchange membrane and silicon dioxide, which is applied in the direction of electrochemical generators, final product manufacturing, fuel cell parts, etc., can solve the problems of reducing the proton conductivity of the membrane, which is no longer obvious, and achieves a good basis for industrial production , improve the selectivity, the effect of preparation condition temperature

Inactive Publication Date: 2013-12-25
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although according to "Membrane Science" (Journal of Membrane Science, 2006, 272, 116-224.), a kind of SiO2 / NafionTM hybrid proton exchange membrane It was found that the promotion effect of the improvement of water retention capacity of the membrane on its proton conductivity is no longer obvious because SiO2 is not a proton conductor, and the concentration of SiO2 in the membrane matrix Existence, but will slightly reduce the proton conductivity of the membrane

Method used

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  • Sulfonated oxidized graphene-silicon dioxide composition/polymer hybridized proton exchange membrane and preparation method thereof
  • Sulfonated oxidized graphene-silicon dioxide composition/polymer hybridized proton exchange membrane and preparation method thereof
  • Sulfonated oxidized graphene-silicon dioxide composition/polymer hybridized proton exchange membrane and preparation method thereof

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Embodiment 1

[0023] Disperse 100mg graphene oxide (GO) and 50mg dicyclohexylcarbodiimide (DCC) in 50ml 3-aminopropyltriethoxysilane (APTS) and sonicate for 3h to obtain a uniform dispersion; The case is placed at 70 o The reaction was carried out under C environment for 24 hours, and finally the product was obtained by repeating the steps of centrifugation-absolute ethanol washing and drying in a vacuum oven: APTS-modified GO (APTS-GO). Then, also under the condition of magnetic stirring, 140 mg APTS-GO was dispersed in a mixed solvent of 2.8 ml formic acid, 42 ml water and 308 ml absolute ethanol at 70 o C for 5d, and finally by repeating the steps of centrifugation-absolute ethanol washing several times, and drying in a vacuum oven to obtain the product: graphene oxide-silicon dioxide composite (GO-SiO 2 ). Then, 50 mg GO-SiO was obtained by ultrasonication for 3 h 2Uniform dispersion in 3.5g toluene; Subsequently, under the condition of condensing and refluxing, 1g γ-methacryloxyprop...

Embodiment 2

[0030] Disperse 100mg graphene oxide (GO) and 50mg dicyclohexylcarbodiimide (DCC) in 50ml 3-aminopropyltriethoxysilane (APTS) and sonicate for 3h to obtain a uniform dispersion; The case is placed at 70 o The reaction was carried out under C environment for 24 hours, and finally the product was obtained by repeating the steps of centrifugation-absolute ethanol washing and drying in a vacuum oven: APTS-modified GO (APTS-GO). Then, also under the condition of magnetic stirring, 140 mg APTS-GO was dispersed in a mixed solvent of 2.8 ml formic acid, 42 ml water and 308 ml absolute ethanol at 70 o C for 5d, and finally by repeating the steps of centrifugation-absolute ethanol washing several times, and drying in a vacuum oven to obtain the product: graphene oxide-silicon dioxide composite (GO-SiO 2 ). Then, 50 mg GO-SiO was obtained by ultrasonication for 3 h 2 Uniform dispersion in 3.5g toluene; Subsequently, under the condition of condensing and refluxing, 1g γ-methacryloxypro...

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Abstract

The invention belongs to the technical field of membranes, and specifically relates to a sulfonated oxidized graphene-silicon dioxide composition / polymer hybridized proton exchange membrane and a preparation method thereof. According to the invention, a sulfonated oxidized graphene-silicon dioxide composition is uniformly dispersed in a polymer matrix, and the proton conductivity of the sulfonated oxidized graphene-silicon dioxide composition / polymer hybridized proton exchange membrane prepared by the method is extremely improved compared with a pure polymer proton exchange membrane, and particularly, the proton conductivity is exponentially improved or even improved to an order of magnitudes under a high temperature environment and / or a low humidity environment. Meanwhile, even in the severe condition of high temperature and / or high methanol concentration, the methanol permeability is further greatly reduced, namely, the sulfonated oxidized graphene-silicon dioxide composition / polymer hybridized proton exchange membrane prepared by the method has extremely excellent selectivity. In addition, the method provided by the invention is simple in operational process, mild in preparation condition, lower in production cost and easy for massive and scaled production, and has a good industrial production basis and a wide application prospect.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to a sulfonated graphene oxide-silicon dioxide composite / polymer hybrid proton exchange membrane and a preparation method thereof. Background technique [0002] Fuel cells have become the most competitive replacement power source for gasoline internal combustion engines due to their high efficiency and pollution-free performance. Among them, the direct methanol fuel cell is called the emerging sixth-generation fuel cell, and the proton exchange membrane is one of its core components, which provides channels for the migration and transport of protons. Batteries play a vital role. An ideal proton exchange membrane should only allow the migration of protons in its membrane matrix, while preventing any methanol permeation. However, since the migration paths of protons and methanol in the proton exchange membrane matrix are almost all through the through channels formed b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10C08L27/18C08L61/16C08L79/04C08L79/08C08K9/06C08K3/04C08K3/36C08J5/22C08J7/12C08J7/14H01M8/1011H01M8/1041H01M8/1069
CPCY02E60/50Y02P70/50
Inventor 冯凯汤蓓蓓武培怡
Owner FUDAN UNIV
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