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Poly N-vinyl pyrrolidone-contained amphiphilic copolymer grafted by natural high polymer or water-solubility derivative thereof and preparation method thereof

A technology of vinylpyrrolidone and natural polymers, which is applied in the field of amphiphilic copolymers containing polyN-vinylpyrrolidone groups grafted with natural polymers or their water-soluble derivatives and its preparation, to improve the effect of complexation stability , good effect of hydrophobic association

Inactive Publication Date: 2010-02-10
陈煜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reports in the literature on the grafting of natural polymer materials or their water-soluble derivatives to functional amphiphilic graft copolymers containing polyvinylpyrrolidone segments.

Method used

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  • Poly N-vinyl pyrrolidone-contained amphiphilic copolymer grafted by natural high polymer or water-solubility derivative thereof and preparation method thereof
  • Poly N-vinyl pyrrolidone-contained amphiphilic copolymer grafted by natural high polymer or water-solubility derivative thereof and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]After fully dissolving a portion of chitosan with 2% dilute acetic acid that is 3 times the total mass of grafted comonomers, the temperature of the system is controlled at 70°C, and 1.5wt% of the initiator azo monomer is added under nitrogen protection. Bisisobutylamidine hydrochloride, after reacting for 20 minutes, add hydrophilic monomer N-vinylpyrrolidone and hydrophobic monomer methyl acrylate according to the molar ratio of 9:1, and add distilled water to the reaction system to control the contact The mass ratio of the total mass of branch copolymerized monomers to chitosan is 12:1, the mass ratio of total water to monomers in the control system is 20:1, and the reaction is stopped after continuing to react for 5 hours at the aforementioned temperature. The product was precipitated with acetone with a mass ratio of 8:1 to the monomer, and then the precipitate was broken up by high-speed stirring at 2500 rpm, and washed with acetone repeatedly under high-speed stirr...

Embodiment 2

[0050] After fully dissolving a portion of carboxymethyl chitosan in distilled water with 5 times the total mass of the grafted comonomers, the temperature of the system was controlled at 70°C, and 2.1wt% of monomer azobis was added under the protection of nitrogen. Isobutyronitrile, after reacting for 20 minutes, add hydrophilic monomer N-vinylpyrrolidone and hydrophobic monomer methyl acrylate according to the molar ratio of 8:2, and add distilled water to the reaction system to control the graft copolymerization. The mass ratio of total mass to chitosan is 11:1, and the mass ratio of total water to monomer in the control system is 18:1, and the reaction is stopped after continuing to react for 5 hours at the aforementioned temperature. The product was precipitated with ethanol with a mass ratio of 10:1 to the monomer, and then the precipitate was broken up by high-speed stirring at 2500 rpm, and washed with ethanol repeatedly under high-speed stirring, and the filter cake wa...

Embodiment 3

[0052] After fully dissolving a portion of carboxymethyl chitosan in distilled water with 5 times the total mass of the grafted comonomers, the temperature of the system was controlled at 80°C, and 3.0wt% of the initiator azobis Isobutylamidine hydrochloride, after reacting for 40 minutes, add hydrophilic monomer N-vinylpyrrolidone according to the molar ratio of 3:5:2, neutralize the acrylic acid and hydrophobic monomer vinyl acetate with a degree of neutralization of 50%, and Add distilled water in reaction system, the mass ratio of the total mass of the monomer of control graft copolymerization and carboxymethyl chitosan is 15: 1, and total water in the control system and monomer mass ratio are 20: 1, at the aforementioned temperature After continuing to react for 8 hours, the reaction was stopped. The product was precipitated with ethanol with a mass ratio of 10:1 to the monomer, and then the precipitate was broken up by high-speed stirring at 2500 rpm, and washed with eth...

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Abstract

The invention provides a poly N-vinyl pyrrolidone-contained amphiphilic copolymer grafted by natural high polymer or water-solubility derivative thereof and a preparation method thereof, and a complexof the copolymer and iodin. After natural high polymer or the water-solubility derivative thereof is dissolved, an initiating agent is added to initiate grafting copolymerization; hydrophilic monomercontaining poly N-vinyl pyrrolidone is added to be polymerized into hydrophilic chain segments, and meanwhile, hydrophobic monomer is added to carry out grafting copolymerization, and then an amphiphilic grafting copolymer derivative containing the polyvinyl pyrrolidone chain segments of natural high polymer or water-solubility derivative thereof, is obtained. The derivative keeps high biologicalactivity and degradability of the natural high polymer or water-solubility derivative thereof and good fixing effect of polyvinyl pyrrolidone having good complexing performance to iodin, and meanwhile, an amphiphilic structure gives the good hydrophobic association and surface activity to the derivative; moreover, the complexing effect of the polyvinyl pyrrolidone chain segments and iodin in thecopolymer is further enhanced.

Description

technical field [0001] The invention relates to a kind of amphiphilic graft copolymer of natural macromolecule material or its water-soluble derivatives and its preparation method, and the complex compound of the amphiphilic graft copolymer and iodine. Background technique [0002] For the preparation of hydrophilic polymer materials such as chitin, chitosan, cellulose, starch, lignin, natural rubber, gelatin, guar gum and other natural polymer materials or their water-soluble derivatives with good graft copolymerization reactivity There have been a large number of reports on the graft copolymer, such as chitosan, carboxymethyl chitosan, hydroxyethyl chitosan, carboxymethyl cellulose, hydroxyethyl cellulose, starch, lignin, natural rubber, Gelatin, guar gum, etc. are used as raw materials, and polyacrylic acid, polyacrylamide, polyvinylpyrrolidone, etc. are grafted on their side chains. The above-mentioned derivatives have good hydrophilic properties, and have been widely u...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F251/02
Inventor 陈煜
Owner 陈煜
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