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A kind of polysulfone with side chain containing quaternary ammonium group and preparation method thereof

A technology of quaternary ammonium groups and side chains, applied in the field of polymers and their preparation, can solve problems such as difficult introduction of quaternary ammonium groups, complicated steps, and inability to meet long-term use requirements

Active Publication Date: 2015-08-12
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Structurally speaking, the quaternary ammonium groups contained in traditional anion exchange membranes are benzylic quaternary ammonium groups such as the most commonly used benzyltrimethyl quaternary ammonium groups, but the alkali resistance of benzyl quaternary ammonium groups in this anion exchange membrane Not enough, unable to meet the long-term use requirements in the working environment of alkaline fuel cells (J.R.Varcoe and R.C.T.Slade, Fuel Cells, 2005,5,187-200.), which is also a bottleneck problem currently restricting the development of alkaline anion exchange membrane fuel cells
In terms of synthetic methods, traditional polymers containing quaternary ammonium groups usually need to synthesize the polymer main chain first, then carry out chloromethylation of the aryl groups on the polymer main chain, and then react with tertiary ammonium to convert benzyl The conversion of base chloride into quaternary ammonium groups is not only complicated in steps but also difficult to accurately control the amount of quaternary ammonium groups introduced. In addition, carcinogenic chloromethyl ether reagents are usually used in the chloromethylation process.

Method used

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  • A kind of polysulfone with side chain containing quaternary ammonium group and preparation method thereof
  • A kind of polysulfone with side chain containing quaternary ammonium group and preparation method thereof
  • A kind of polysulfone with side chain containing quaternary ammonium group and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] 0.01 moles of 2,2, -bis(4-trimethylamino)butoxybiphenyl dibromide, 1.00 moles of 4,4, -diphenyl ether disulfonic acid, 0.99 moles of 2,2, -bis Methoxybiphenyl and 4 liters of trifluoromethanesulfonic acid were added to the reaction flask with nitrogen, and the reaction was stirred at 60 ° C for 48 hours. The reaction solution was poured into a large amount of deionized water while hot to obtain polymer precipitation. Wash repeatedly until the filtrate is neutral, soak the obtained polymer with 1 mol / L sodium hydroxide aqueous solution at room temperature for 24 hours, and vacuum dry at room temperature to obtain OH - A polymer with quaternary ammonium groups present in the side chains. In the infrared spectrum at 1310cm -1 with 1150cm -1 Strong stretching vibration peaks of sulfone groups appeared on the left and right, indicating the occurrence of sulfone-based polymerization. The structure of the obtained polymer and the proportion of each structural unit calculated...

Embodiment 2

[0087] 0.01 moles of 2,2,-bis(4-trimethylamino)butoxybiphenyl dibromide prepared according to the method of Example 1, 1.00 moles of 4,4,-diphenyl ether disulfonic acid, 0.99 Molar 2,2,-dimethoxybiphenyl and 4 liters of trifluoromethanesulfonic acid were added to the reaction flask with nitrogen, and the reaction was stirred at 80 °C for 24 hours, and the reaction solution was poured into a large amount of deionized water while hot to obtain polymerization. The polymer was precipitated, filtered and repeatedly washed with deionized water until the filtrate was neutral. The obtained polymer was soaked in a 1 mol / L sodium hydroxide aqueous solution at room temperature for 24 hours, and then vacuum-dried at room temperature to obtain OH - A polymer with quaternary ammonium groups present in the side chains. In the infrared spectrum at 1310cm -1 with 1150cm -1 Strong stretching vibration peaks of sulfone groups appeared on the left and right, indicating the occurrence of sulfone...

Embodiment 3

[0089] 0.01 moles of 2,2,-bis(4-trimethylamino)butoxybiphenyl dibromide prepared according to the method of Example 1, 1.00 moles of 4,4,-diphenyl ether disulfonic acid, 0.99 Molar 2,2,-dimethoxybiphenyl and 4 liters of trifluoromethanesulfonic acid were added to the reaction flask with nitrogen, and the reaction was stirred at 100 ° C for 10 hours, and the reaction solution was poured into a large amount of deionized water while hot to obtain polymerization. The polymer was precipitated, filtered and repeatedly washed with deionized water until the filtrate was neutral. The obtained polymer was soaked in a 1 mol / L sodium hydroxide aqueous solution at room temperature for 24 hours, and then vacuum-dried at room temperature to obtain OH - A polymer with quaternary ammonium groups present in the side chains. In the infrared spectrum at 1310cm -1 with 1150cm -1 Strong stretching vibration peaks of sulfone groups appeared on the left and right, indicating the occurrence of sulfo...

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Abstract

The invention provides polysulfone with a quaternary ammonium group at a side chain. The content of the quaternary ammonium group in polysulfone is controllable; and polysulfone with the quaternary ammonium group at the side chain can be used for preparing an anionic exchange membrane which is high in electrical conductivity, good in mechanical performances and low in price. The invention further provides a preparation method of polysulfone with the quaternary ammonium group at the side chain. Besides, the invention further provides the anionic exchange membrane.

Description

technical field [0001] The invention relates to the field of polymers and their preparation, in particular to a polysulfone containing quaternary ammonium groups in side chains and a preparation method thereof. Background technique [0002] Anion exchange membrane is a membrane material with positively charged ion groups fixed in the membrane body, which can selectively permeate anions. It has excellent ion selectivity and mechanical properties. In recent years, it has been used in many fields such as electrolysis and fuel cells. have been widely studied and applied. [0003] Anion exchange membranes are usually prepared from polymers containing quaternary ammonium groups. Structurally, the quaternary ammonium group contained in the traditional anion exchange membrane is a benzyl quaternary ammonium group such as the most commonly used benzyltrimethyl quaternary ammonium group, but the benzylic quaternary ammonium group in this anion exchange membrane is alkali resistant. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/20C08L81/06
Inventor 徐铜文张正辉
Owner UNIV OF SCI & TECH OF CHINA
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