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Preparation method for perfluorosulfonic acid ion membrane by using multilayer solution tape casting

A technology of perfluorosulfonic acid ion and polyperfluorosulfonic acid, which is applied in the direction of final product manufacturing, collector/separator, sustainable manufacturing/processing, etc., can solve problems such as difficult to achieve mechanical properties, and achieve excellent proton conductivity , high power density, fast start-up effect

Inactive Publication Date: 2013-11-06
贺建芸 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the film produced by it is very thin, and it is difficult to achieve certain mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 150g of fluororesin and put it into 20% sodium hydroxide solution, transform it in an oven at 100°C for 24h. After transformation, take the sodium-form perfluorosulfonic acid resin out of the oven, use gauze to separate the resin from the sodium hydroxide solution, and wash the sodium-form resin until neutral. After drying the sodium-form resin cleaned to neutrality, it is put into an autoclave together with 500ml of water and 500ml of isopropanol. The temperature of the reactor is set to 250°C, and the rotation speed is set to 120r / min. After the temperature reaches 250°C, the pressure is stable at 6Mpa. Dissolve at constant temperature and pressure for 4 hours, close the reactor, and lower the temperature and pressure. (Since the reactor does not have a cooling device, the temperature and pressure drop is relatively slow, about 10 hours). After the pressure dropped to 0, the solution was withdrawn. The solution taken out was put into a 2L beaker, and 400ml of ...

Embodiment 2

[0031] Take 150g of fluororesin and put it into 20% sodium hydroxide solution, transform it in an oven at 100°C for 24h. After transformation, take the sodium-form perfluorosulfonic acid resin out of the oven, use gauze to separate the resin from the sodium hydroxide solution, and wash the sodium-form resin until neutral. After drying the sodium-form resin cleaned to neutrality, it is put into an autoclave together with 500ml of water and 500ml of isopropanol. The temperature of the reactor is set to 250°C, and the rotation speed is set to 120r / min. After the temperature reaches 250°C, the pressure is stable at 6Mpa. Dissolve at constant temperature and pressure for 4 hours, close the reactor, and lower the temperature and pressure. (Since the reactor does not have a cooling device, the temperature and pressure drop is relatively slow, about 10 hours). After the pressure dropped to 0, the solution was withdrawn. The taken out solution was put into a 2L large beaker, and 200...

Embodiment 3

[0033]Take 150g of fluororesin and put it into 20% sodium hydroxide solution, transform it in an oven at 100°C for 24h. After transformation, take the sodium-form perfluorosulfonic acid resin out of the oven, use gauze to separate the resin from the sodium hydroxide solution, and wash the sodium-form resin until neutral. After drying the sodium-form resin cleaned to neutrality, it is put into an autoclave together with 500ml of water and 500ml of isopropanol. The temperature of the reactor is set to 250°C, and the rotation speed is set to 120r / min. After the temperature reaches 250°C, the pressure is stable at 6MPa. Dissolve at constant temperature and pressure for 4 hours, close the reactor, and lower the temperature and pressure. (Since the reactor does not have a cooling device, the temperature and pressure drop is relatively slow, about 10 hours). After the pressure dropped to 0, the solution was withdrawn. The solution taken out was put into a 2L beaker, and 400ml of 1...

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Abstract

The invention relates to a preparation method for a perfluorosulfonic acid ion membrane by using multilayer solution tape casting. According to the method, a low-boiling solvent is used to dissolve a perfluorosulfonate resin, then a high-boiling solvent is used to replace the low-boiling solvent, and finally, tape casting is repeatedly carried out many times. The invention has the following characteristics: through three-layer superposed solution pouring and tape casting, the thickness of the membrane reaches 200 mu m, so the disadvantage of a thin membrane produced in traditional solution pouring and tape casting is overcome. The method enables a long chain structure of the perfluorosulfonate resin to be retained, so the prepared perfluorosulfonic acid ion membrane maintains original proton conductivity, heat resistance, electrochemical performance and chemical stability. Moreover, the method has the advantages of a high degree of automation, simple operation, capacity of realizing large-scale continuous production, high controllability and stable product quality.

Description

1. Technical field [0001] The invention relates to a method for preparing a perfluorosulfonic acid ion membrane by adopting a multilayer solution casting casting method, which belongs to the field of polymer material processing. 2. Background technology [0002] Fuel cell technology is considered to be one of the best ways to solve problems such as air pollution, global warming and increasing dependence on fossil fuels. Proton exchange membrane fuel cells have the advantages of high power density, high working current density, low working temperature, and fast start-up speed. The proton exchange membrane is one of the core components of the membrane electrode of the proton exchange membrane fuel cell, and its performance plays a vital role in the operation of the whole system. The currently widely used proton exchange membrane material is perfluorosulfonic acid resin membrane. This type of material has excellent proton conductivity, heat resistance, mechanical properties, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/14C08J5/22C08L101/02H01M8/02H01M2/16H01M8/0202
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 贺建芸周奇杰邢胜俐
Owner 贺建芸
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