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Polyarylethersulfone containing multiple flexible side chain quaternary ammonium salt structures, and preparation method thereof

A technology of polyaryl ether sulfone and quaternary ammonium salt is applied in the field of polymer anion exchange membrane and its preparation. Water swelling, excellent dimensional stability, the effect of improving ion conduction

Active Publication Date: 2020-06-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing polymer anion exchange membranes are mainly polystyrene polymer membranes. The ion conductivity of this type of electrolyte membrane is very low, and the stability of alkali resistance is poor, which cannot meet the development needs of alkaline fuel cells. Therefore, further development of comprehensive The new aromatic polymer electrolyte membrane material with excellent performance has important research significance and application value

Method used

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  • Polyarylethersulfone containing multiple flexible side chain quaternary ammonium salt structures, and preparation method thereof
  • Polyarylethersulfone containing multiple flexible side chain quaternary ammonium salt structures, and preparation method thereof
  • Polyarylethersulfone containing multiple flexible side chain quaternary ammonium salt structures, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Preparation of polyarylethersulfone with multiple flexible side chain quaternary ammonium salt structure

[0036] In a 100mL dry three-necked flask equipped with mechanical stirring, 1.0g (5.1mmol of hydroxyl) polyaryl ether sulfone polymer (PAES-OH-35) containing polyhydroxyl structure was dissolved in 10mL of N-methylpyrrolidone solvent, Add 0.61g (15.3mmol) of sodium hydride and 4.4g (15.3mmol) (5-bromopentyl) trimethylammonium bromide at 0°C, react at 90°C for 6h, pour the reactant into isopropyl Precipitate in alcohol to obtain polyarylethersulfone (PAES-QA-35) containing multiple flexible quaternary ammonium salt side group structures, with a yield of 98%; 1 H NMR (DMSO-d 6 ,400MHz), as attached Figure 4 as shown in c.

[0037] (2) Preparation of polyaryl ether sulfone containing polyhydroxyl structure

[0038] In a 250 mL dry three-neck flask equipped with mechanical stirring and nitrogen protection, 2.0 g (9.5 mmol methoxy) of polyarylethersulfone (PAES...

Embodiment 2

[0042] (1) Preparation of polyarylethersulfone with multiple flexible side chain quaternary ammonium salt structure

[0043] In a 100mL dry three-neck flask equipped with mechanical stirring, 1.0g (3.9mmol of hydroxyl) polyaryl ether sulfone polymer (PAES-OH-25) containing polyhydroxyl structure was dissolved in 15mL of N-methylpyrrolidone solvent, Add 0.31g (7.8mmol) of sodium hydride and 2.3g (7.8mmol) (5-bromopentyl) trimethylammonium bromide at 0°C, react at 90°C for 8h, pour the reactant into isopropyl Settled in alcohol to obtain polyarylethersulfone (PAES-QA-25) with multiple flexible quaternary ammonium salt side group structures, with a yield of 98%.

[0044] (2) Preparation of polyaryl ether sulfone containing polyhydroxyl structure

[0045] In a 250 mL dry three-neck flask equipped with mechanical stirring and nitrogen protection, 2.0 g (7.5 mmol methoxy) of polyarylether sulfone (PAES-M-25) containing polymethoxyl structure was dissolved in 100 mL of chloroform I...

Embodiment 3

[0049] (1) Preparation of polyarylethersulfone with multiple flexible side chain quaternary ammonium salt structure

[0050] In a 100mL dry three-necked flask equipped with mechanical stirring, 1.0g (2.6mmol of hydroxyl) polyaryl ether sulfone polymer (PAES-OH-15) containing polyhydroxyl structure was dissolved in 15mL of N-methylpyrrolidone solvent, Add 0.31g (7.7mmol) of sodium hydride and 2.2g (7.7mmol) (5-bromopentyl) trimethylammonium bromide at 0°C, react at 90°C for 8h, pour the reactant into isopropyl Settled in alcohol to obtain polyarylethersulfone (PAES-QA-15) with a structure containing multiple flexible quaternary ammonium salt side groups, with a yield of 98%.

[0051] (2) Preparation of polyaryl ether sulfone containing polyhydroxyl structure

[0052] In a 250 mL dry three-neck flask equipped with mechanical stirring and nitrogen protection, 2.0 g (5.0 mmol methoxy) of polyarylethersulfone (PAES-M-15) containing polymethoxyl structures was dissolved in 100 mL o...

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Abstract

The invention belongs to the field of polymer anion exchange membranes and preparation thereof, and particularly relates to polyarylethersulfone containing multiple flexible side chain quaternary ammonium salt structures, and a preparation method thereof. The preparation method comprises the following steps: firstly, performing bromination and Suzuki coupling on 4,4'-difluorodiphenyl sulfone to prepare an active difluorosulfone monomer containing an octamethoxy structure; then, performing copolycondensation on the monomer, 4,4'-difluorodiphenyl sulfone and biphenol to prepare polyarylether sulfone containing a polymethoxy structure, further utilizing a demethylation reaction to convert the prepared polyether sulphone containing the polymethoxy structure into a polymer containing a hydroxylstructure, and finally utilizing a Williamson reaction to react the polymer containing the hydroxyl structure with (5-bromopentyl)trimethylammonium bromide to obtain the polyethersulfone containing multiple flexible side chain quaternary ammonium salt structures. The polyarylethersulfone has excellent film-forming property, and the prepared polymer film has high alkali-resistant stability, ionicconductivity and dimensional stability, and has important potential application value in application of alkaline fuel cells.

Description

technical field [0001] The invention belongs to the field of polymer anion exchange membrane and its preparation, in particular to a polyaryl ether sulfone with multiple flexible side chain quaternary ammonium salt structures and its preparation method. Background technique [0002] Polymer membrane fuel cell is a kind of important new energy battery, which has the characteristics of fast start-up, high energy density, green and environmental protection, and can be applied in transportation, fixed power station, portable power supply and other fields. Polymer membrane fuel cells mainly include proton exchange membrane fuel cells, alkaline fuel cells and phosphoric acid fuel cells. Compared with proton exchange membrane fuel cells, alkaline fuel cells have higher electrode reaction kinetics under alkaline working conditions, can use cheap non-precious metal catalysts, and have low risk of catalyst poisoning, etc., and have received more attention. Polymer anion exchange memb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23
CPCC08G75/23Y02E60/50
Inventor 汪称意陶正旺周远鹏赵晓燕李坚任强
Owner CHANGZHOU UNIV
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