Preparation method of gemini type organic phosphonic acid betaine

By preparing gemini organic phosphonic acid betaine, the problem of low stability of existing phosphorus-containing functional monomers was solved, and the chemical stability and functionality of polymer materials in acidic and alkaline environments were improved, especially the anti-pollution and hydrophilic properties in aromatic polyamide composite membranes were improved.

CN120665114APending Publication Date: 2025-09-19JIANGSU OCEAN UNIV
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Patent Information

Application Number
CN202510615882.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-14
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

Existing phosphorus-containing functional monomers have low chemical stability and high prices, which limit their application in polymer material modification. In addition, aromatic polyamide composite membranes have insufficient anti-pollution performance and hydrophilicity in seawater desalination.

Method used

Gemini organophosphonic acid betaine was prepared by reacting N,N'-bis(2-phosphonoethyl)-N,N'-diallyldiamine with trimethylsilyl bromide and epichlorohydrin, followed by hydrolysis with an alkaline ion exchange resin. The prepared product was used for functional modification of the surface of polymer materials.

Benefits of technology

The prepared gemini organic phosphonic acid betaine has high chemical stability in acidic and alkaline water environments, has antibacterial and antifouling properties and high hydrophilicity, and is suitable for modifying polymer materials, thereby improving the functionality and stability of the materials.

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Abstract

The invention provides a preparation method of alpha-(unsaturated ammonium group) alkyl phosphonic acid inner salt, which is unsaturated ammonium group phosphonic acid type betaine, can be used as a functional monomer for grafting modification of free radicals on the surface of high polymer materials such as polyolefin and the like, and also can be used as a functional monomer for grafting modification of free radicals on the surface of high polymer materials such as polyolefin and the like. The amphoteric ionic polymer can be prepared by mixing or mixing acrylic ester, acrylonitrile or other olefin monomers for copolymerization, and can also be used for ring-opening grafting modification of starch, cellulose, polyurethane, polyamide and other high polymer materials containing amino groups or hydroxyl groups in the structure. Meanwhile, the obtained high polymer material is endowed with the functional effects of zwitter-ionization, hydrophilicity, antibacterial property, antifouling property and the like of the organic phosphonic acid betaine; and the chemical stability in an acid-base water environment is high.
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