Unlock instant, AI-driven research and patent intelligence for your innovation.

Polymer anion-exchange membrane based on imidazole cation and preparation method thereof

An anion exchange membrane, imidazolium cation technology, applied in the field of ion exchange membrane and its preparation, can solve the problems of unevenness, membrane damage ammonium, poor thermal stability and chemical stability, etc., to prevent uneven ammonium, prevent membrane Structural damage, the effect of avoiding the use of carcinogenic agents

Inactive Publication Date: 2013-02-06
XIAMEN UNIV
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the preparation process of traditional anion exchange membranes, the chloromethylation step often requires the use of highly toxic and carcinogenic reagents, and the chloromethylation and ammonium reagents may cause damage to the membrane or uneven ammonization
Traditional quaternary ammonium salt-type anion exchange membranes also have disadvantages such as poor thermal stability and chemical stability.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polymer anion-exchange membrane based on imidazole cation and preparation method thereof
  • Polymer anion-exchange membrane based on imidazole cation and preparation method thereof
  • Polymer anion-exchange membrane based on imidazole cation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 0.01mol of 1-(4-vinylbenzyl)-3-methylimidazole chloride ([VBMI]Cl) into the three-necked flask, then take 0.03mol of styrene, 10ml of ethanol and 0.015g of azobisiso Nitrile, under the protection of nitrogen, was placed in a 65°C oil bath with magnetic stirring and refluxed for 24 hours. After the reaction, the obtained viscous liquid was transferred to a beaker, and vacuum dried at 60°C for 6 hours. After the drying, the product is soaked in tetrahydrofuran for repeated washing to remove unreacted monomers, and dried at 60° C. to obtain a polymer containing imidazole cationic groups.

[0034] 0.7 g of the above polymer containing imidazole cationic groups was fully dissolved in 15 ml of dimethyl sulfoxide, vacuum degassed, cast on a clean glass plate to form a film, and dried at 75° C. for 12 hours. Peel the film off the glass plate and place it in 1mol L -1 After soaking in the NaOH solution for 24 hours at room temperature, use a large amount of deionized water to...

Embodiment 2

[0040] Take 0.01mol of 1-(4-vinylbenzyl)-3-methylimidazole chloride ([VBMI]Cl) into the three-necked flask, then take 0.04mol of n-butyl methacrylate, 12ml of methanol and 0.020g The azobisisobutyronitrile, under the protection of nitrogen, was placed in an oil bath at 65°C under magnetic stirring and refluxed for 24 hours. After the reaction, the obtained viscous liquid was transferred to a beaker, and vacuum dried at 60°C for 6 hours. After the drying, the product is soaked in tetrahydrofuran for repeated washing to remove unreacted monomers, and dried at 60° C. to obtain a polymer containing imidazole cationic groups.

[0041] 0.6 g of the polymer containing imidazole cationic groups was fully dissolved in 15 ml of dimethyl sulfoxide, vacuum degassed, cast on a clean glass plate to form a film, and dried at 75° C. for 12 hours. Peel the film off the glass plate and place it in 1mol L -1 After soaking in the NaOH solution for 24 hours at room temperature, use a large amount of...

Embodiment 3

[0047] The same method as in Example 1 was used, except that the monomer A used was 1-(4-vinylbenzyl)-3-ethylimidazole bromide. The performance indexes of the prepared membrane are the same as in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention, relating to an anion-exchange membrane and its preparation method, provides an anion-exchange membrane with the advantages of simple preparation, low cost, high conductivity, good chemical and heat stability. The polymer anion-exchange membrane based on imidazole cation is prepared by the following steps: synthesizing unsaturated hydrocarbons (monomer A) containing imidazole cationand aromatic hydrocarbons or esters (monomer B) containing nonsaturated double bond through radical copolymerization, and casting the polymer solution into a membrane by phase inversion process and drying. The preparation method comprises no chloromethylation and no quaternization, so as to avoid using carcinogenic reagents in chloromethylation, preventing injury of membrane structure and nonuniform ammonium in quaternarisation. The conductivity, water content and ion exchange capacity of the prepared anion-exchange membrane can be adjusted by regulating the compounding ratio of monomer A to monomer B.

Description

Technical field [0001] The invention relates to an ion exchange membrane and a preparation method thereof, in particular to a polymer anion exchange membrane based on imidazole cations and a preparation method thereof. Background technique [0002] With its selective permeability to ions in the solution, ion exchange membranes are used as key materials in separation, purification, bionics, and electrochemical components, and are widely used in various industrial fields, such as seawater desalination, salt solution concentration, Purification of organic and inorganic compounds, fuel cell membranes and ion selective electrodes, etc. Ion exchange membranes can be divided into cation exchange membranes, anion exchange membranes, and amphoteric exchange membranes according to their different functions. [0003] Ion exchange membrane is a membrane-like polymer electrolyte containing ion exchange groups. It consists of three parts: a polymer matrix, an active group with positive (negativ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/08C08L33/10C08L33/12C08L33/08C08F212/08C08F212/32C08F220/18C08F226/06C08F220/14C08J5/22B01J41/14
Inventor 方军李伟吕明
Owner XIAMEN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com