Preparation method of ultra-thin enhanced proton exchange membrane

A proton exchange membrane and enhanced technology, which is applied in the field of preparation of ultra-thin enhanced proton exchange membrane, can solve the problems of low tensile strength, low strength, high price, etc., achieve uniform thickness, increase yield, and improve penetration effect of ability

Inactive Publication Date: 2010-06-23
LINGQI ENVIRONMENTAL PROTECTION EQUIP FACTORY SHANGHAI
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  • Abstract
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  • Claims
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Problems solved by technology

But its strength is not high, and it is expensive
In order to improve its strength and reduce the amount of sulfonic acid resin to reduce the cost, a polytetrafluoroethylene film is used as the base frame, and the sulfonic acid resin is compounded on this membrane to make a reinforced proton exchange membrane and mass-produced, but the price is still

Method used

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  • Preparation method of ultra-thin enhanced proton exchange membrane
  • Preparation method of ultra-thin enhanced proton exchange membrane
  • Preparation method of ultra-thin enhanced proton exchange membrane

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Embodiment

[0029] The steps of the preparation method of ultra-thin reinforced proton exchange membrane of the present invention are as follows:

[0030] First, the polytetrafluoroethylene microporous film is pretreated, and the polytetrafluoroethylene microporous film with a thickness of 4 μm, a pore size of 0.9 μm, and a porosity of 70-80% is immersed in a low-carbon alcohol solution for immersion time. 3-4 hours, and then irradiate with ultraviolet rays, the ultraviolet irradiation time is 1.5-2.5 hours, the wavelength of the ultraviolet irradiation is 140-160nm, and the surface temperature of the polytetrafluoroethylene microporous film reaches 55-65°C.

[0031] Then compound, the equipment used during compounding is a reinforced proton exchange membrane compound device and a spray device for spraying sulfonic acid resin solution.

[0032] The enhanced proton exchange membrane composite device includes a composite disc 11, a stainless steel support grid layer 14 arranged in sequence ...

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Abstract

The invention relates to a preparation method of an ultra-thin enhanced proton exchange membrane, which is characterized by comprising the following steps of: (1) pretreatment: firstly, immersing a PTFE millipore membrane in a low carbon alcohol solution for 2-10 hours, and then, irradiating the millipore membrane with ultraviolet rays for 1-4 hours; (2) compounding: compounding under a vacuum condition and in a heating state, spraying a sulfoacid resin solution to the PTFE millipore membrane, seeping into millipores, and forming a proton exchange membrane by the PTFE milipores and sulfoacid resin membrane layers on both sides of the PTFE millipore membrane; (3) rolling: hot rolling the primarily formed proton exchange membrane in double rollers, and finally, forming the compact proton exchange membrane. The thickness of the proton exchange membrane is from 4 to 12 mum, the deviation value of non-uniform thickness is from +/-0.2 to +/-0.5 mum, the electrical conductivity is from 0.1 to 0.15 s/cm, and the tensile strength is from 40 to 50 MPa.

Description

Technical field: [0001] The invention relates to a proton exchange membrane, in particular to a preparation method of an ultra-thin reinforced proton exchange membrane. Background technique: [0002] The proton exchange membrane is one of the key components of the proton exchange membrane fuel cell, and its quality is directly related to the performance and service life of the fuel cell. [0003] The ultra-thin perfluorosulfonic acid resin proton exchange membrane is used to conduct protons, and the working principle is based on electrochemistry. On the anode side, hydrogen dissociates on the surface of the anode catalyst to generate protons and electrons, and the protons pass through the sulfonic acid group (-SO 3 H) Transfer to the cathode, and the electrons reach the anode through the external circuit load, thus forming a complete electrical circuit to supply power to the outside world. The proton exchange membrane made of sulfonic acid resin is an important focus of re...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M8/10H01M2/14H01M8/0202H01M8/1018H01M8/1069H01M50/403
CPCY02E60/12Y02E60/522Y02P70/50Y02E60/50
Inventor 黄斌香黄磊吴利瑞
Owner LINGQI ENVIRONMENTAL PROTECTION EQUIP FACTORY SHANGHAI
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