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Aromatic polymer sulfonamide, and preparation method and application thereof

An aromatic polymer, sulfonyl chloride aromatic technology, used in electrical components, circuits, fuel cell parts and other directions, can solve the problems of enhanced water absorption of ionic membranes, poor chemical stability, and weak ion conductivity. , to achieve the effect of convenient processing, simple composition and simple preparation method

Active Publication Date: 2015-11-25
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, most of the traditional aromatic ion exchange membranes are obtained by sulfonation of aromatic resins. Because the conductive groups of this resin are benzenesulfonate groups with weak acidity, the ion conductivity is weak at low sulfonation degree. Large surface resistance
However, improving the conductivity by increasing the degree of sulfonation will increase the water absorption of the ionic membrane, deteriorate the chemical stability, increase the swelling rate, and even dissolve in water.

Method used

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  • Aromatic polymer sulfonamide, and preparation method and application thereof
  • Aromatic polymer sulfonamide, and preparation method and application thereof
  • Aromatic polymer sulfonamide, and preparation method and application thereof

Examples

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Embodiment 1

[0039] In this embodiment, the sulfonamidated polyaromatic polymer is a polymer with polyether ether ketone as its main chain and benzenesulfonamide groups as its side chains. The polymer uses polyether ether ketone as raw material, sulfuric acid as sulfonation reagent, thionyl chloride as acyl chloride reagent, liquid ammonia as amidation reagent, and is prepared through reactions such as acyl chloride and amidation.

[0040] Concrete preparation method comprises the following steps:

[0041] Step 1: In a 50ml three-neck flask, add 20ml of concentrated sulfuric acid with a concentration of 98% by mass, then stir and add 1g of polyether ether ketone resin powder, heat up to 40°C, and perform sulfonation reaction for 12h; after the reaction, pour the reaction product into ice water, the resin is precipitated, and fully washed with deionized water to obtain sulfonated polyether ether ketone resin.

[0042] Step 2: Add the sulfonated polyether ether ketone resin obtained in step...

Embodiment 2

[0049] In this embodiment, the sulfonamidated polyaromatic polymer is a polymer with polysulfone as its main chain and benzenesulfonamide groups as its side chains. The polymer is prepared by taking polysulfone as raw material, chlorosulfonic acid as sulfonating reagent and acyl chloride reagent, ammonia as amidation reagent, and is prepared through reactions such as acyl chloride and amidation.

[0050] Concrete preparation method comprises the following steps:

[0051] Step 1: In a 50ml three-neck flask, add 20ml of dichloromethane, then stir and add 1g of polysulfone resin particles, after dissolving, slowly drop in 3ml of chlorosulfonic acid dissolved in 10ml of dichloromethane, and put it in an ice-water bath React for 3 hours; after the reaction, pour the reaction product into ice water to precipitate the resin, wash it thoroughly with deionized water, and freeze-dry to obtain the sulfonyl chloride polysulfone resin.

[0052] Step 2: Put the sulfonyl chloride polysulfon...

Embodiment 3

[0058] In this embodiment, the sulfonamidated polyaromatic polymer is a polymer with polyether ether ketone as its main chain and benzenesulfonamide groups as its side chains. The polymer uses polyether ether ketone as raw material, fuming sulfuric acid as sulfonation reagent, phosphorus oxychloride as acyl chloride reagent, ammonia water as amidation reagent, and is prepared through sulfonation, acyl chloride, amidation and other reactions.

[0059] Concrete preparation method comprises the following steps:

[0060] Step 1: In a 50ml three-neck flask, add 20ml of concentrated sulfuric acid with a concentration of 98% by mass, then stir and add 1g of polyetheretherketone resin powder, slowly add 5ml of oleum dropwise, and react for 2 hours; pour the reaction product into ice water , the resin is precipitated, and the resin is fully washed with deionized water to obtain a sulfonated polyether ether ketone resin.

[0061] Step 2: Add the sulfonated polyetheretherketone resin ob...

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Abstract

The invention provides an aromatic polymer sulfonamide. The above polymer adopts an aromatic polymer as a main chain, and the side chain of the polymer contains a sulfonamide group. The sulfonamide group is hydrophobic, can dissociate at a high temperature to provide protons, and cross-links with an acyl chloride group, a sulfonyl chloride group and a phosphoryl chloride group, so the aromatic polymer sulfonamide has the advantages of good barrier, good conductivity and good mechanical strength as a film material, and has good application prospects in fields of fuel batteries, flow batteries, electrodialysis and solid acid catalysts.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a sulfonamidated aromatic polymer and a preparation method thereof. The resin can be made into a diaphragm and applied to liquid flow batteries, methanol fuel cells, hydrogen fuel cells, electrodialysis, lithium Ion secondary batteries and other fields. Background technique [0002] As a widely used high-performance material, ion-exchange membrane materials play an important role in the fields of chlor-alkali, new energy, and water treatment. The application range is wider and wider, and the demand is increasing. Homogeneous proton exchange membrane materials occupy an increasingly important position in ion exchange membranes because of their uniform and dense film formation, high electrical conductivity, and good isolation performance. [0003] At present, there are two kinds of homogeneous ion exchange membranes widely used, one is the perfluorosulfonic acid membrane...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08G8/02C08G75/20C08J5/22H01M8/02H01M2/16H01M50/423
CPCY02E60/50
Inventor 薛立新聂锋秦德君陆地
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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