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Modified polyethyleneimine polymer and preparation method thereof

A technology of polyethyleneimine and branched polyethyleneimine is applied in the field of modified polyethyleneimine polymer and its preparation, which can solve the problems of expensive initiators and harsh preparation conditions, and is beneficial to large-scale production. Industrial production, high adsorption efficiency, mild synthesis conditions

Active Publication Date: 2021-05-07
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these N-sulfonyl aziridine ring-opening polymerization reactions need to be carried out under anhydrous and oxygen-free conditions, and expensive initiators need to be used, and the preparation conditions are relatively harsh.

Method used

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  • Modified polyethyleneimine polymer and preparation method thereof
  • Modified polyethyleneimine polymer and preparation method thereof
  • Modified polyethyleneimine polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Weigh branched polyethyleneimine (molecular weight: 1800) and N-sulfonyl aziridine compound with a molar mass ratio of 1:0.3 and add it to a 10ml reagent bottle, wait until the temperature of the oil bath or heating plate or heating mantle reaches 200 After ℃, put the reagent bottle into it and stir for 30 seconds to mix the N-sulfonyl aziridine compound and branched polyethyleneimine evenly, and maintain 200℃ under normal pressure for 0.5h to obtain modified polyethyleneimine Amine polymers. The structure of the obtained product is characterized by nuclear magnetic resonance as polyethyleneimine modified copolymer after N-sulfonyl aziridine nucleophilic ring opening, the conversion rate reaches 100%, the purity is >98%, and there is no need for tedious dialysis, Drying and other purification operations.

Embodiment 2

[0043] Weigh branched polyethyleneimine (molecular weight: 1800) and N-sulfonyl aziridine compound with a molar mass ratio of 1:0.5 and add it to a 10ml reagent bottle, wait until the temperature of the oil bath or heating plate or heating mantle reaches 200 After ℃, put the reagent bottle into it and stir for 30 seconds to mix the N-sulfonyl aziridine compound and branched polyethyleneimine evenly, and maintain 200℃ under normal pressure for 0.5h to obtain modified polyethyleneimine Amine polymers. The structure of the obtained product is characterized by nuclear magnetic resonance as a polyethyleneimine modified copolymer after nucleophilic ring opening of N-sulfonyl aziridine, with a conversion rate of 100% and a purity of >98%, without the need for tedious dialysis and drying and other purification operations.

Embodiment 3

[0045] Weigh branched polyethyleneimine (molecular weight: 10000) and N-sulfonyl aziridine compound with a molar mass ratio of 1:0.3 and add it to a 10ml reagent bottle, wait until the temperature of the oil bath or heating plate or heating mantle reaches 200 After ℃, put the reagent bottle into it and stir for 30 seconds to mix the N-sulfonyl aziridine compound and branched polyethyleneimine evenly, and maintain 200℃ under normal pressure for 0.5h to obtain modified polyethyleneimine Amine polymers. The structure of the obtained product is characterized by nuclear magnetic resonance as a polyethyleneimine modified copolymer after nucleophilic ring opening of N-sulfonyl aziridine, with a conversion rate of 100% and a purity of >98%, without the need for tedious dialysis and drying and other purification operations.

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Abstract

The invention belongs to the technical field of polyethyleneimine modified copolymer synthesis, and provides a modified polyethyleneimine polymer and a preparation method thereof. The modified polyethyleneimine polymer comprises branched polyethyleneimine serving as a main chain and sulfonyl secondary amine or polysulfonamide grafted on the branched polyethyleneimine, and is a light yellow non-viscous solid. By adjusting the reaction molar ratio of the branched polyethyleneimine to the N-sulfonyl aziridine, the amphiphilic and oil-soluble modified polyethyleneimine polymer can be selectively prepared. The oil-soluble polymer shows excellent fluorescence performance, and the amphiphilic polymer has great application prospects in the fields of adsorption materials, analysis and detection and the like. According to the preparation method, a vacuum reaction environment or an inert gas atmosphere is not needed, the ring-opening reaction or the ring-opening polymerization reaction is only carried out in a solvent-free and catalyst-free melting environment, the synthesis condition is mild, the yield is high, the product purity is high, and large-scale industrial production is facilitated.

Description

technical field [0001] The application belongs to the technical field of polyethyleneimine modified copolymers, and in particular relates to a modified polyethyleneimine polymer and a preparation method thereof. Background technique [0002] Polyethyleneimine is a water-soluble graft polymer with a large number of amine groups in its molecular chain, and its most prominent feature is its high cationic charge density. From the structure, polyethyleneimine can be divided into linear polyethyleneimine (L-PEI) and branched polyethyleneimine (B-PEI), in which the amines on the molecular chain of linear polyethyleneimine are all secondary amines, while The amines on the branched polyethyleneimine molecular chain are divided into primary amines, secondary amines and tertiary amines. At present, polyethyleneimine is widely used in the fields of gene transfection, paper making, flocculant, dye fixing agent and fiber modification. In recent years, due to the excellent adsorption pro...

Claims

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Application Information

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IPC IPC(8): C08G73/02
CPCC08G73/0206C08G73/0213
Inventor 张震李准轩罗文艺王莹朱淋淋
Owner GUANGDONG UNIV OF TECH