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Preparation method of aromatic polymer ion exchange membrane containing fluosulfonic acid on side chain

An aromatic polymer and ion exchange membrane technology, applied in the field of polymer functional membranes, can solve the problems of cumbersome preparation process and low efficiency, and achieve the effects of simple process, convenient operation and fast processing speed

Active Publication Date: 2012-02-01
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods have the problems of cumbersome preparation process and low efficiency to varying degrees.

Method used

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  • Preparation method of aromatic polymer ion exchange membrane containing fluosulfonic acid on side chain
  • Preparation method of aromatic polymer ion exchange membrane containing fluosulfonic acid on side chain
  • Preparation method of aromatic polymer ion exchange membrane containing fluosulfonic acid on side chain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Immersion of polysulfone porous membrane in liquid ICF 2 CF 2 OCF 2 CF 2 SO 2 In F, take it out after soaking at room temperature for 5 hours, dry it, then put it into a plasma generating device, and carry out plasma grafting modification in the plasma atmosphere area, the processing power is 210W, and the processing time is 3 minutes, and then Removal of ICF not grafted on polysulfone with acetone 2 CF 2 OCF 2 CF 2 SO 2 F, the obtained modified membrane was hydrolyzed in an aqueous sodium hydroxide solution at 50°C for 5 hours, and the sodium polymer membrane was taken out, and then ion-exchanged in dilute hydrochloric acid solution, and the side chain fluorine-containing sulfonic acid polysulfone ion was obtained after drying exchange membrane.

Embodiment 2

[0054] Immersion of polyphenylene sulfide porous membrane in liquid ICF 2 CF 2 OCF 2 CF 2 SO 3 In a 50% aqueous solution of K, soak for 5 hours at 40°C, take it out, dry it, then put it into a plasma generator, and carry out plasma grafting modification in the plasma atmosphere area. The processing power is 180W, and the processing time is for 5 min, then remove the ICF that was not grafted on the PPS with water 2 CF 2 OCF 2 CF 2 SO 3 K, the obtained potassium type polymer ion exchange membrane, and then carry out ion exchange in dilute hydrochloric acid solution, and obtain side chain fluorine-containing sulfonic acid polyphenylene sulfide ion exchange membrane after drying.

Embodiment 3

[0056] Immersion of polyaraimide-based porous membranes in liquid ICF 2 CF 2 OCF 2 CF 2 SO 2 In F, take it out after soaking at room temperature for 8 hours, dry it, then put it into a plasma generating device, and carry out plasma grafting modification in the plasma atmosphere area, the processing power is 170W, and the processing time is 4 minutes, and then Removal of ICF not grafted on polyarimide with ethanol 2 CF 2 OCF 2 CF 2 SO 2 F, the obtained modified membrane was hydrolyzed in a sodium hydroxide aqueous solution at 50°C for 6 hours, and the sodium polymer membrane was taken out, and then ion-exchanged in a dilute hydrochloric acid solution, and after drying, the side chain fluorine-containing sulfonic acid polyarylamide was obtained. imine ion exchange membrane.

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Abstract

The invention discloses a preparation method of an aromatic polymer ion exchange membrane containing fluosulfonic acid on the side chain. The low temperature plasma method is used to carry out in-situ grafting modification on the aromatic polymer membrane and introduce fluosulfonic acid group on the side chain. In comparison with the prior art, the preparation method provided by the invention hasadvantages of low cost, simple process, convenient operation, fast processing speed, good processing effect, no environmental pollution, energy conservation and emission reduction, and is more suitable for industrial production, and can be applied in the fields of new energy technology, various electrolytic preparation devices, electrodialysis, chemical catalysis, gas separation, gas drying, sewage processing, seawater desalination, chlor alkali industry and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer functional membranes, and in particular relates to a preparation method of side chain fluorine-containing sulfonic acid aromatic polymer ion exchange membranes. Background technique [0002] In recent years, in the face of increasingly prominent contradictions among energy, resources, and the environment, countries around the world have introduced policies and measures to promote the development of new energy technologies. In this wave, fuel cells as portable mobile power sources and flow batteries for large-scale power storage have broad application prospects in the fields of communications, military and emergency rescue, and have received special attention. Both cell devices utilize an ion-exchange membrane to separate the oxidation and reduction half-cells in the same single cell. It is precisely because of this important demand that high-performance ion-exchange membranes, as new energy mater...

Claims

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Application Information

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IPC IPC(8): C08J9/40C08J7/12C08J7/14C08J7/18C08L81/06C08L81/02C08L79/08C08L71/00C08L65/00
Inventor 薛立新陶慷赵秀兰聂锋许亮
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI