Method for preparing epoxy morpholine quaternary ammonium salt-modified polybenzimidazole anion exchange membrane

An anion exchange membrane, polybenzimidazole technology, which is applied in the field of preparation of epoxymorpholine quaternary ammonium salt modified polybenzimidazole anion exchange membrane, can solve problems such as unfavorable human health and industrialized production, and achieve broad industrial application Prospect, mild reaction conditions, good alkali resistance

Active Publication Date: 2011-08-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of chloromethylation usually uses highly toxic subs

Method used

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  • Method for preparing epoxy morpholine quaternary ammonium salt-modified polybenzimidazole anion exchange membrane
  • Method for preparing epoxy morpholine quaternary ammonium salt-modified polybenzimidazole anion exchange membrane
  • Method for preparing epoxy morpholine quaternary ammonium salt-modified polybenzimidazole anion exchange membrane

Examples

Experimental program
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Example Embodiment

[0026] Example 1

[0027] (1) In a 100ml dry three-necked flask, first add 5ml of acetonitrile, then add 20ml (0.18mol) N-methylmorpholine, 14.7ml (0.18mol) epichlorohydrin, and after fully stirring, vent nitrogen and The temperature was increased to 40°C and the heating was stopped after 48 hours of reaction, and a large amount of white solid was produced. Suction filtration and the obtained epoxymorpholine quaternary ammonium salt were fully washed three times with ether and once with acetone, and then fully dried in a vacuum oven at 50° C. for 10 h until use.

[0028] (2) In a 100ml dry three-necked flask, add 0.646g (2mmol) of amino-containing polybenzimidazole and 17.6ml of dimethyl sulfoxide, protect with nitrogen, and raise the temperature to 80°C. After the amino-containing polybenzimidazole is fully dissolved, the temperature is reduced to room temperature and 0.387 g (2 mmol) of epoxymorpholine quaternary ammonium salt is added, and the temperature is raised to 85° C. an...

Example Embodiment

[0031] Example 2

[0032] (1) In a 100ml dry three-necked flask, first add 5ml of acetonitrile, then add 20ml (0.18mol) N-methylmorpholine, 14.7ml (0.18mol) epichlorohydrin, and after fully stirring, vent nitrogen and The temperature was increased to 40°C, and the heating was stopped after 48 hours of reaction, and a large amount of white solid was produced. Suction filtration and the obtained epoxymorpholine quaternary ammonium salt were fully washed three times with ether and once with acetone, and then fully dried in a vacuum oven at 50° C. for 10 h until use.

[0033] (2) In a 100ml dry three-necked flask, add 0.646g (2mmol) of amino-containing polybenzimidazole and 17.6ml of dimethyl sulfoxide, protect with nitrogen, and raise the temperature to 80°C. After the amino-containing polybenzimidazole is fully dissolved, it is lowered to room temperature and 0.580 g (3 mmol) of epoxymorpholine quaternary ammonium salt is added, and the temperature is raised to 85° C. and reacted fo...

Example Embodiment

[0036] Example 3

[0037] (1) In a 100ml dry three-necked flask, first add 5ml of acetonitrile, then add 20ml (0.18mol) N-methylmorpholine, 14.7ml (0.18mol) epichlorohydrin, and after fully stirring, vent nitrogen and The temperature was increased to 40°C, and the heating was stopped after 48 hours of reaction, and a large amount of white solid was produced. Suction filtration and the obtained epoxymorpholine quaternary ammonium salt were fully washed three times with ether and once with acetone, and then fully dried in a vacuum oven at 50° C. for 10 h until use.

[0038] (2) In a 100ml dry three-necked flask, add 0.646g (2mmol) of amino-containing polybenzimidazole and 17.6ml of dimethyl sulfoxide, protect with nitrogen, and heat to 80°C. After the amino-containing polybenzimidazole is fully dissolved, the temperature is reduced to room temperature and 0.774 g (4 mmol) of epoxymorpholine quaternary ammonium salt is added, and the temperature is raised to 85° C. and reacted for 10...

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Abstract

The invention relates to a method for preparing an epoxy morpholine quaternary ammonium salt-modified polybenzimidazole anion exchange membrane, which comprises the steps of: at first, adding chloroepoxy propane and N-methylmorpholine to an acetonitrile solvent, controlling reaction time and temperature to obtain epoxy morpholine quaternary ammonium salt, then dissolving an amino-containing polybenzimidazole homopolymer or copolymer in an organic solvent, reacting the organic solvent with the epoxy morpholine quaternary ammonium salt to obtain epoxy morpholine quaternary ammonium salt-modified polybenzimidazole, then dissolving the epoxy morpholine quaternary ammonium salt-modified polybenzimidazole in the organic solvent, adding a diepoxy crosslinking agent to the organic solvent, and performing casting membrane forming to obtain the epoxy morpholine quaternary ammonium salt-modified polybenzimidazole anion exchange membrane with excellent properties, wherein the anion electric conductivity of the membrane can reach 0.06S/cm. The epoxy quaternary ammonium salt compound-modified polybenzimidazole crosslinking membrane has quite extensive industrial application prospect in the fields such as alkali fuel cell, water treatment, heavy metal ion recovery and the like.

Description

technical field [0001] The invention relates to a preparation method of an anion exchange membrane, in particular to a preparation method of an epoxy morpholine quaternary ammonium salt modified polybenzimidazole anion exchange membrane. The anion exchange membrane can be applied to various technical fields such as liquid flow energy storage batteries, alkaline fuel cells, water treatment, and recovery of heavy metal ions. Background technique [0002] Anion exchange membranes generally use polymers as the main chain, with positively charged active groups on the side chains and mobile anions on the active groups. At present, most anion exchange membranes use trimethylamine-type quaternary ammonium salts as their active groups, and their structural formula is: -N + (CH 3 ) 3 . The synthesis route mostly adopts the method of chloromethylation, that is, first chloromethylation of the polymer with chloromethyl ether, and then quaternization with trimethylamine to obtain a qu...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08G73/18B01D69/06B01D67/00C08J3/24B01D71/62B01J41/12B01J41/13
Inventor 房建华袁森徐宏郭晓霞夏子君
Owner SHANGHAI JIAO TONG UNIV
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