A modified tri-block copolymer electrolyte membrane and its preparation method

An electrolyte membrane and tri-block technology, applied in the field of electrolytes, can solve problems such as difficult separation and treatment, easy flocculation and instability of aluminum trichloride, and achieve high ion exchange capacity, safe and environmentally friendly preparation process, and optimized use effects
CN105169977BInactive Publication Date: 2017-09-15NANYANG NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANYANG NORMAL UNIV
Publication Date
2017-09-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a modified triblock copolymer electrolyte membrane and a preparation method thereof, belonging to the technical field of electrolyte. The modified triblock copolymer electrolyte membrane has a structure as shown in the specification, wherein in the formula, m, n and p are respectively integers from 50 to 3000, x is more than zero and smaller than or equal to m, and y is more than zero and smaller than or equal to n; T is monovalent anion. The preparation method comprises the following steps: adding modified triblock copolymer SEBS and excess trimethylamine and dimethylformamide into a reactor, wherein the solid content is 5-20wt%; stirring for reaction for 24 hours at 40 DEG C, then coating reaction liquid to a clean horizontal glass board to form a membrane naturally, evaporating the solvent at the temperature of 60 DEG C, and stripping the membrane, thus obtaining the modified triblock copolymer electrolyte membrane. According to the invention, the conventional route of chloromethylation is abandoned, and a chloroacetyl modification method is adopted, so that the membrane is relatively environmental-friendly and safe, and an ion exchange membrane with higher chlorine content, namely, higher ion exchange capacity, and excellent conductivity can be obtained.
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Description

technical field

[0001] The invention belongs to the technical field of electrolytes, and in particular relates to a modified triblock copolymer electrolyte membrane and a preparation method thereof. Background technique

[0002] At present, anion exchange membranes have been widely used in various energy-saving and clean production chemical fields, such as the recovery of metal ions and waste acids by membrane diffusion dialysis, the concentration and desalination of dilute salt solutions by membrane electrodialysis, and electrolytic diaphragms in hydrometallurgical industries. , anion selective electrodes, alkaline membrane fuel cells, etc. Cationic polymer electrolytes immobilized with positively charged ionic groups such as quaternary ammonium groups and quaternary phosphonium groups are the key components for the preparation of anion exchange membranes.

[0003] The existing technology for preparing cationic polymer electrolytes is usually to chloromethylate the aryl gr...

Claims

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