Imidazole onium salt anion-exchange membrane and preparation method thereof

An anion-exchange membrane and imidazolium technology, which is applied in the field of imidazolium salt-type anion-exchange membrane and its preparation, can solve the problems of anion-exchange membrane performance degradation, high toxicity of compounds, and environmental pollution, and achieve good chemical stability and grafting The effect of easy process and good thermal stability
CN102151502AInactive Publication Date: 2011-08-17XIAMEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN UNIV
Publication Date
2011-08-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an imidazole onium salt anion-exchange membrane and a preparation method thereof, belonging to an anion-exchange membrane. The invention provides an imidazole onium salt anion-exchange membrane with better thermal stability and chemical stability and a preparation method thereof. The imidazole onium salt anion-exchange membrane is prepared by adopting a polymeric membrane, and has a chemical structure of one class of high polymers with side chains containing imidazole onium salt. The imidazole onium salt anion-exchange membrane has a membrane ionic conductivity of being more than 0.01S / cm, has better thermal stability and chemical stability and can be used at high temperature and in a strong acid, strong alkali and strong oxidizing agent. The preparation method comprises the steps of: soaking a polymeric membrane in acetone, and drying to constant weight after cleaning; radiating a film by high-energy rays; placing the radiated film in a container, injecting monomers in the container to ensure that the film is completely immersed into the monomers, vacuumizing, charging inert gases to the container until no air exists in the container, placing a water bathfor reacting after sealing, removing unreacted monomers, and drying; and soaking the grafted film with a quaternization reagent, and washing with deionized water to obtain the imidazole onium salt anion-exchange membrane.
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Description

technical field

[0001] The invention relates to an anion exchange membrane, in particular to an imidazolium salt type anion exchange membrane and a preparation method thereof. Background technique

[0002] Anion exchange membranes are widely used in water treatment, purification, concentration and separation of substances, chlor-alkali industry, and alkaline anion exchange membrane fuel cells, liquid flow energy storage batteries, new supercapacitors, etc. The anion exchange membrane is composed of a polymer matrix, positively charged active groups and mobile anions on the active groups. At present, the disclosed strong base anion exchange membranes are generally polymers of quaternary ammonium salt type. Since the active group quaternary ammonium salt has poor thermal stability and is easily oxidized and degraded by oxidants, its application range is greatly limited.

[0003] Chinese patent 200710072040.7 discloses a modified anion exchange membrane and its preparation met...

Claims

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