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Nano yttrium oxide modified sulfonated polyphenylene sulfide proton exchange membrane and preparation method thereof

A technology of sulfonated polyphenylene sulfide and proton exchange membrane, applied in electrochemical generators, climate sustainability, final product manufacturing, etc., can solve environmental pollution, decrease in proton conductivity, and limit the application of perfluorosulfonic acid membranes and other problems, to achieve the effect of high conductivity, good alcohol resistance and low preparation cost

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

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Problems solved by technology

[0003] At present, the most widely used perfluorosulfonic acid membrane is represented by the Nafion membrane commercialized by DuPont Company of the United States. Long-term use of this fluoride will seriously pollute the environment. When the operating temperature exceeds 80 °C, the proton conductivity will drop significantly. Limiting the further application of perfluorosulfonic acid membranes in fuel cells

Method used

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  • Nano yttrium oxide modified sulfonated polyphenylene sulfide proton exchange membrane and preparation method thereof
  • Nano yttrium oxide modified sulfonated polyphenylene sulfide proton exchange membrane and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] 1. Preparation of SPPS film-making solution: DMF was used as the film-making solution, and the ground SPPS material with a sulfonation degree of 65.2% was dissolved in the film-making solvent to prepare a film-making solution with a mass percentage of SPPS of 10%.

[0024] 2.SPPS / Nano Y 2 o 3 Preparation of film-making solution: in the SPPS film-making solution obtained in step 1, add nanometer Y at a dose of 5% by mass 2 o 3 powder with a particle size of 60 nm. Stir with a magnetic stirrer at 30 °C for 4 h and at 75 °C for 6 h to make the nano-Y 2 o 3 The powder is uniformly dispersed in the film-making solution to obtain SPPS / nano Y 2 o 3 Membrane solution.

[0025] 3.SPPS / Nano Y 2 o 3 Preparation of proton exchange membrane: pour the mixed membrane-making liquid obtained in step 2 into a clean flat mold to form a membrane. The mixed film-making solution in the mold volatilizes the solvent at 50 °C to obtain SPPS / Y 2 o 3 wet film. The wet film was first ...

Embodiment 2

[0043] 1. Preparation of SPPS film-making solution: DMF was used as the film-making solution, and the ground SPPS material with a sulfonation degree of 68.7% was dissolved in the film-making solvent to prepare a film-making solution with a mass percentage of SPPS of 10%.

[0044] 2.SPPS / Nano Y 2 o 3 Preparation of film-making solution: in the SPPS film-making solution gained in step 1, add nanometer Y at a dose of 8% by mass 2 o 3 powder with a particle size of 70 nm. Stir with a magnetic stirrer at 30 °C for 4 h and at 75 °C for 6 h to make the nano-Y 2 o3 The powder is uniformly dispersed in the film-making solution to obtain SPPS / nano Y 2 o 3 Membrane solution.

[0045] 3.SPPS / Nano Y 2 o 3 Preparation of proton exchange membrane: pour the mixed membrane-making liquid obtained in step 2 into a clean flat mold to form a membrane. The mixed film-making solution in the mold volatilizes the solvent at 50 °C to obtain SPPS / Y 2 o 3 wet film. The wet film was first drie...

Embodiment 3

[0054] 1. Preparation of SPPS film-making solution: DMF was used as the film-making solution, and the ground SPPS material with a sulfonation degree of 72.1% was dissolved in the film-making solvent to prepare a film-making solution with a mass percentage of SPPS of 20%.

[0055] 2.SPPS / Nano Y 2 o 3 Preparation of film-making solution: In the SPPS film-making solution obtained in step 1, add nanometer Y at a dose of 12.5% ​​by mass 2 o 3 powder with a particle size of 80 nm. Stir with a magnetic stirrer at 30 °C for 4 h and at 75 °C for 6 h to make the nano-Y 2 o 3 The powder is uniformly dispersed in the film-making solution to obtain SPPS / nano Y 2 o 3 Membrane solution.

[0056] 3.SPPS / Nano Y 2 o 3 Preparation of proton exchange membrane: pour the mixed membrane-making liquid obtained in step 2 into a clean flat mold to form a membrane. The mixed film-making solution in the mold volatilizes the solvent at 50 °C to obtain SPPS / Y 2 o 3 wet film. The wet film was f...

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Abstract

The invention relates to a nano yttrium oxide modified sulfonated polyphenylene sulfide proton exchange membrane and a preparation method thereof. The proton exchange membrane comprises the following components in percentage by mass: 85.5-99.9% of SPPS (sulfonated polyphenylene sulfide) of which the sulfonation degree is 57-80% and 0.1-14.5% of nano Y2O3 powder. The preparation method disclosed by the invention comprises the following steps of: preparing a uniformly mixed membrane solution by using the SPPS as a matrix and rare earth metallic oxide nano Y2O3 as a filling phase, and then drying to prepare an inorganic-organic composite membrane according to a curtain coating or compression film forming method. The invention is low in preparation cost, the prepared SPPS / Y2O3 proton exchange membrane is high in electric conductivity and good in alcohol resistance, the electric conductivity is 8.1*10<-3>-1.9*10<-2>S / cm at 40-110 DEG C, the alcohol resistance coefficient reaches 1.0*10<-8>-6.5*10<-7>cm<2> / s, and the water absorption rate is 12.49-60.12%.

Description

technical field [0001] The invention relates to a sulfonated polyphenylene sulfide proton exchange membrane and a preparation method thereof, in particular to a nanometer yttrium oxide modified sulfonated polyphenylene sulfide proton exchange membrane and a preparation method thereof. Background technique [0002] Proton exchange membrane (PEM) is the core part of direct methanol fuel cell (DMFC), which is a hot spot in the current energy research and development. Its material must have good proton conductivity, suitable methanol permeability and good water swelling resistance. The proton conductivity should be at least 10 -2 S / cm, the methanol permeability coefficient is lower than 10 -6 cm 2 / s. Make the proton exchange membrane have a long service life in DMFC. [0003] At present, the most widely used perfluorosulfonic acid membrane is represented by the Nafion membrane commercialized by DuPont Company of the United States. Long-term use of this fluoride will serio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08K3/22C08J5/18H01M8/02H01M8/10H01M8/1032H01M8/1088
CPCY02E60/50Y02P70/50
Inventor 郭强李夏钱君质张天骄毕宸洋陈新新
Owner SHANGHAI UNIV
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