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Porous proton exchange membrane material and preparation method thereof

A proton exchange membrane, proton exchange technology, applied in ion exchange, cation exchange, chemical instruments and methods, etc., can solve problems such as the reduction of gas permeability, achieve the effect of improving stability, optimizing materials and production processes

Inactive Publication Date: 2008-08-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results show that the filling degree of the composite membrane is improved and the gas transmission rate of the membrane is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of perfluorosulfonic acid porous membrane

[0019] 400 ml of perfluorosulfonic acid resin solution (solvent is 30% ethanol, 70% isopropanol) with a concentration of 5% is poured into glassware with length, width, and height of 10cm, 10cm, and 5cm respectively, and then at a temperature of 85 Vacuum drying at ±5℃ for 12 hours to obtain a cast film; lift the cast film from the surface of the glass and hot press, the hot pressing temperature is 120±10℃, the pressure is 2MPa; the hot pressed film is cut into 4cm wide Strip, then stretch the wide band longitudinally at 110±10℃, and then cool to room temperature naturally; finally stretch the above-mentioned longitudinally stretched film transversely at 110±10℃ at a stretching speed of 5m / s, The stretching ratio is 10 times; the microporous membrane formed after stretching is heat-set at 120-140°C for 10 minutes to obtain a perfluorosulfonic acid hydrophilic porous membrane.

[0020] The perfluorosulfonic acid hydroph...

Embodiment 2

[0022] Preparation of Sulfonated Polybenzimidazole Porous Membrane

[0023] Pour 400 ml of sulfonated polybenzimidazole solution (solvent is ethanol) with a sulfonation degree of 10% and a concentration of 15% into a glass container of the same size as in Example 1, and then vacuum dry at a temperature of 80°C After 18 hours, the cast film is obtained; the cast film is lifted from the glass surface and hot-pressed, the hot-pressing temperature is 160±10℃, the pressure is 10MPa; the hot-pressed film is cut into 5cm wide strips, and then the temperature is 190±10℃. Stretch the strip longitudinally at a temperature of 10℃, and then naturally cool to room temperature; finally stretch the longitudinally stretched film at a temperature of 180±10℃ in a transverse direction, with a stretching speed of 10m / s and a stretching ratio of 20 Times; the microporous membrane formed after stretching is placed at 190±10°C for heat setting for 20 minutes to obtain a sulfonated polybenzimidazole hydr...

Embodiment 3

[0026] Preparation of Sulfonated Polyetheretherketone Porous Membrane

[0027] Pour 600 ml of sulfonated polyether ether ketone solution (solvent is propanol) with a sulfonation degree of 65% and a concentration of 20% into a glass container of the same size as in Example 1, and then at a temperature of 80±10°C Dry under vacuum for 24 hours to obtain a cast film; lift the cast film from the surface of the glass and hot press at 170±10℃ and pressure 5MPa; cut the hot pressed film into 5cm wide strips, and then Stretch the strip longitudinally at a temperature of 180±10℃, and then naturally cool to room temperature; finally, stretch the longitudinally stretched film at a temperature of 170±10℃ in the transverse direction at a stretching speed of 5m / s. The magnification is 40 times; the microporous membrane formed after stretching is heat-set at 190±10°C for 15 minutes to obtain the hydrophilic porous sulfonated polyetheretherketone membrane.

[0028] The water flux of the sulfonated...

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Abstract

The invention provides a polymerized porous membrane with a hydrophilic body, which is composed of proton exchange resin monomer containing sulfonic acid group, wherein the proton exchange resin monomer is perfluorinated sulfonic acid resin or sulfonated heat stable polymer with proton exchange function. The porous membrane is prepared by casting solution of proton exchange resin to form a membrane, cutting to strips after heat-pressing, extending the strips in longitudinal and transversal direction, and heat-setting finally. The inventive membrane material can be used as multi-functional membrane material and be applied to fuel cell material.

Description

Technical field [0001] The invention relates to a porous proton exchange membrane and a preparation method thereof. The prepared porous proton exchange membrane body has strong hydrophilicity and proton conductivity. The porous membrane material of the present invention can be used as a multifunctional membrane separation material or applied to fuel cell materials and the like. Background technique [0002] At present, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polypropylene (PP) and other microporous membranes have high chemical stability, mechanical properties and strong hydrophobicity and can be used as sterilization filters. Membrane, electrolysis membrane, gas dialysis membrane, membrane distillation, membrane absorption, various solvent ultra-clean filtration membranes, are ideal materials for membrane separation processes, and are also widely used for drug release, artificial organs, and proton exchange membrane fuel cells to enhance composite protons ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08L81/00C08L79/00C08L85/02C08L25/00C08L83/00B01J39/18B01J39/19
Inventor 木士春王晓恩潘牧
Owner WUHAN UNIV OF TECH
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