Polyaspartate/polyacrylic acid copolymer IPN (Interpenetrating Polymer Networks) hydrogel and preparation method thereof

A technology of polyacrylic acid copolymer and polyaspartic acid is applied in the field of multiphase continuous hydrogel and its preparation to achieve the effects of increasing binding force, increasing network density and realizing complementarity

Inactive Publication Date: 2012-09-26
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the water-absorbing resin obtained by the above-mentioned prior art has been improved, its comprehensive performance needs to be further improved, especially salt tolerance, biodegradability, and sensitivity to pH and temperature. It must be used in biomedicine and soil improvement. , water treatment and material separation and other fields have broad application prospects, and there is an urgent need for interpenetrating network technology to become an important means of polymer modification with its unique topology and synergistic effect, and to open up new opportunities for the preparation of polymer materials with excellent properties. way

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0018] (1) Dissolve 10 g of polysuccinimide in 50 ml of N,N-dimethylformamide, cross-link for 4 hours with 3% hexamethylenediamine with a mass percentage of polysuccinimide at 45°C, and then Disperse the cross-linked polysuccinimide in a mixed solution of 300ml ethanol and water (volume ratio 5:5), hydrolyze with 2mol / L sodium hydroxide solution until the pH value reaches 8, add ethanol for precipitation, soak , until the product becomes brittle; vacuum-dry at 40°C, grind and pass through a 100-mesh sieve to obtain cross-linked polyaspartic acid;

[0019] (2) Under the protection of nitrogen, neutralize 3.8ml of acrylic acid with 2.7ml of 40% potassium hydroxide solution in an ice bath, and the degree of neutralization is 70%. After adding 42.4ml of distilled water, add 0.0120g of initiator ammonium persulfate, 0.0016 g crosslinking agent N, N-methylenebisacrylamide, 2ml concentration of 0.048mol / L phase catalyst tetrabutylammonium bromide and 1.5ml hydroxypropyl methacrylat...

Embodiment approach 2

[0022] (1) 10g of polysuccinimide was dissolved in 100ml of N,N-dimethylformamide, and at 45°C, it was cross-linked with 4% hexamethylenediamine with a mass percentage of polysuccinimide for 5 hours, and then Disperse the cross-linked polysuccinimide in a mixed solution of 300ml ethanol and water (volume ratio 7:3), hydrolyze with 2mol / L sodium hydroxide solution until the pH value reaches 9, add ethanol for precipitation, soak , until the product becomes brittle, vacuum-dried at 45°C, ground and passed through a 200-mesh sieve to obtain cross-linked polyaspartic acid;

[0023] (2) Under the protection of nitrogen, neutralize 3.8ml of acrylic acid with 2.9ml of 40% sodium hydroxide solution in an ice bath, and the degree of neutralization is 75%. After adding 21.7ml of distilled water, add 0.0160g of initiator potassium persulfate, 0.0024 g crosslinking agent N, N-methylenebisacrylamide, 5ml concentration of 0.048mol / L phase catalyst tetramethylethylenediamine, 1.3g acrylami...

Embodiment approach 3

[0026] (1) 10g polysuccinimide is dissolved in 150ml N, in the N-dimethylformamide, at 45 ℃, use the hexamethylenediamine cross-linking of 6% of polysuccinimide with mass percent for 6 hours, then Disperse the cross-linked polysuccinimide in a mixed solution of 300ml ethanol and water (6:4 by volume), hydrolyze it with 2mol / L sodium hydroxide solution until the pH value reaches 10, add ethanol for precipitation, soak , until the product becomes brittle, vacuum-dried at 45°C, ground and passed through a 200-mesh sieve to obtain cross-linked polyaspartic acid;

[0027](2) Under the protection of nitrogen, neutralize 3.8ml of acrylic acid with 3.1ml of 40% ammonium hydroxide solution in an ice bath, and the degree of neutralization is 80%. After adding 10.1ml of distilled water, add 0.0200g of initiator ammonium persulfate, 0.0032 g crosslinking agent N, N-methylenebisacrylamide, 7ml concentration of 0.048mol / L phase catalyst tetrabutylammonium chloride and 4g acrylamide are dis...

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Abstract

The invention relates to polyaspartate / polyacrylic acid copolymer IPN (Interpenetrating Polymer Network) hydrogels and a preparation method thereof. The IPN hydrogel is a heterogeneous continuous hydrogel formed by the interpenetration of the networks of the copolymer of biodegradable cross-linked polyaspartate and polyacrylic acid. The preparation method includes the following steps of: partially neutralizing crylic acid; then swelling the cross-linked polyaspartate in a mixed solution composed of crylic acid, initiator, cross-linking agent, phase catalyst and other unsaturated monomers; andfinally conducting polymerization reaction and drying to obtain the polyaspartate / polyacrylic acid copolymer IPN hydrogel. The distilled water adsorption ratio of the hydrogel disclosed by the invention is 430-1500g / g, and the saline adsorption ratio of the hydrogel is 80-230g / g. The hydrogel is sensitive to both temperature and pH value and is biodegradable.

Description

technical field [0001] The present invention is related to a polyaspartic acid hydrogel and its preparation method, especially a kind of interpenetration of biodegradable cross-linked polyaspartic acid and polyacrylic acid (salt) copolymer through its network Multiphase continuous hydrogels formed by entanglement and methods for their preparation. Background technique [0002] The application of polymer functional hydrogels has attracted more and more attention, especially its special properties, which vary slightly with the external environment, such as temperature, pH value, light, magnetism, sound, force, etc., and its own structure , Physical and chemical properties undergo reversible abrupt changes. It is precisely because of the environmental sensitivity of this type of polymer hydrogel that it can be used in many fields, such as: biomedicine, soil improvement, water treatment and material separation, material separation such as drug controlled release system, memory ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/04C08F220/06C08F220/56C08F220/28C08F228/02
Inventor 赵彦生陈小玲张婵爱刘成岑温亚龙焦晓燕
Owner TAIYUAN UNIV OF TECH
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