PP-ST-DVB-based cation exchange fiber and synthesis method thereof

Abstract

The invention discloses a PP-ST-DVB-based cation exchange fiber and a synthesis method thereof, and belongs to the technical field of polymer materials. A PP-ST-DVB fiber is taken as a raw material fiber, a benzene ring on the PP-ST-DVB fiber and an organic compound containing an intramolecular acid anhydride group are subjected to a reaction under the action of a catalyst, carboxyl is introduced,and the fiber material containing carboxyl is obtained. The fiber material has high carboxyl content, maintains good shape, elasticity and strength, and has application prospect in functional textiles, water and air purification, chemical substance separation and extraction, and the like. According to the synthesis method, carboxyl is introduced into the polypropylene fiber grafted with styrene with a one-step method, so that the use of carcinogens such as chloromethyl ether in the traditional synthesis method is avoided, and the synthesis method is simple in process, mild in condition and easy to control.

Description

technical field [0001] The invention relates to a fiber material and a synthesis method thereof, in particular to a PP-ST-DVB-based cation exchange fiber material and a synthesis method thereof, belonging to the technical field of polymer materials. Background technique [0002] Textile fibers are a good source of raw materials for new materials due to their abundant supply, variety and affordable prices. Common textile fibers (synthetic and natural) can be functionalized or pre-grafted to allow further functionalization, such as polypropylene fiber radiation grafting or solution chemical reaction grafting of styrene and divinylbenzene , is the preferred route for the functionalization of polypropylene fibers. There have been decades of research at home and abroad, the technology is mature, and related products have been commercialized. Functionalized fibers not only maintain the original characteristics and advantages of fibers, but also have various special properties and...

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Problems solved by technology

[0004] In the above literature report, "Synthesis of carboxyl-containing ion exchange fiber and its effect on UO 2 2+ "Study on the adsorption performance of polyacrylonitrile fiber-CN group hydrolysis to prepare weakly acidic fibers, using a two-step method, the carboxyl fibers prepared by this method are prone to collapse and short flow when used in water purification filled adsorption columns, and Soaking for a long time is easy to continue hydrolysis, resulting in a large loss of fiber structure; "Preparation of Weakly Acidic Polypropylene Ion Exchange Fiber and Its Application in Adsorption and Recovery of Rare Earth Elements" is to graft acrylic acid monomers to On the polypropylene fiber, its carboxyl content is 9.5mmol / g, but its adsorption capacities for yttrium, cerium, praseodymium and neodymium are only 1.73mmol / g, 2.58mmol / g, 0.74mmol / g, 1.93mmol / g in actual application. g, much lower than its carboxyl content, which may be due to the small distance between the grafted carboxyl and the polypropylene backbone, due to steric hindrance during adsorption, some carboxyl groups cannot function or multiple carboxyl groups and the same One ion carries out chelation; patent " a kind of preparation method of the ion-exchange fiber containing carboxyl and quaternary ammonium group " (CN 101768865 A) is to graft acrylic acid monomer on the polypropylene fiber by the method of irradiation grafting, but its The carboxyl content after grafting is only 2.27mmol / g; the patent "a 6-aminopyridine-3-carboxylic acid chelating resin and its preparation method" (CN102295723A) uses chloromethyl ether to polystyrene chloromethylation reaction Introduce active groups to the benzene ring, and then react with carboxyl-containing 6-aminopyridine-3-carboxylic acid to introduce carboxyl groups. Chloromethyl ether is used in the preparation process, and chloromethyl ether is a confirmed human carcinogen one of the things

Using PP-ST-DVB fiber as the raw material fiber, the benzene ring on the PP-ST-DVB fiber reacts with organic compounds containing intramolecular anhydride groups (such as maleic anhydride, succinic anhydride) under the action of a catalyst to introduce carboxyl groups , the method of obtaining carboxyl-containing fiber materials has not yet been reported

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