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High-strength self-repairing antibacterial hydrogel and preparation method thereof

A hydrogel, high-strength technology, applied in the field of high-strength, self-healing antibacterial hydrogel and its preparation, can solve the problem that hydrogel cannot have high mechanical and self-healing properties at the same time, and achieve excellent antibacterial ability , prolong life, good self-healing effect

Inactive Publication Date: 2020-07-03
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that traditional hydrogels cannot have high mechanical properties and self-healing properties at the same time, and provide a high-strength, self-repairing antibacterial hydrogel and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Disperse 0.5 g of polyvinyl alcohol powder in 20 ml of deionized water, place it on a magnetic stirrer at room temperature and stir until completely dissolved; then add 0.1 g of carboxymethyl chitosan and 5 g of acrylic acid in sequence, and mix to obtain a uniform and transparent solution; 0.3 g of FeCl 3 and 0.2 g of N, N'-methylenebisacrylamide were added to the mixed solution; then 0.1 g of ammonium persulfate was added, and nitrogen bubbles were used to remove the existing oxygen; subsequently, the above uniformly mixed solution was injected into the test tube In this method, the photopolymerization reaction is carried out under ultraviolet light irradiation for 10 minutes; after the polymerization is completed, a hydrogel with high strength, self-healing and antibacterial properties can be obtained, and the hydrogel is washed several times in deionized water to remove any untreated reacting monomer.

Embodiment 2

[0013] Disperse 0.4 g of polyvinyl alcohol powder in 20 ml of deionized water, place it on a magnetic stirrer at room temperature and stir until completely dissolved; then add 0.08 g of carboxymethyl chitosan and 5 g of acrylic acid in sequence, and mix to obtain a uniform and transparent solution; 0.3 g of FeCl 3 and 0.2 g of N, N'-methylenebisacrylamide were added to the mixed solution; then 0.08 g of ammonium persulfate was added, and nitrogen bubbles were used to remove the oxygen present; subsequently, the above uniformly mixed solution was injected into the test tube In this method, the photopolymerization reaction is carried out under ultraviolet light irradiation for 10 minutes; after the polymerization is completed, a hydrogel with high strength, self-healing and antibacterial properties can be obtained, and the hydrogel is washed several times in deionized water to remove any untreated reacting monomer.

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Abstract

The invention discloses a high-strength self-repairing antibacterial hydrogel and a preparation method thereof. The hydrogel is characterized in that the hydrogel is high-strength self-repairing antibacterial hydrogel; and the high-strength self-repairing antibacterial hydrogel is prepared through a copolymerization reaction of polyacrylic acid grafted carboxymethyl chitosan and polyvinyl alcohol,the molar ratio of reactants acrylic acid to carboxyl groups on carboxymethyl chitosan is 1:1 to 10:1, and the molar ratio of acrylic acid to hydroxyl groups on polyvinyl alcohol is 1:1 to 10:1. Theself-repairing intelligent hydrogel is synthesized in a short time through ultraviolet irradiation, and the method is simple, safe to operate and easy to accept by researchers. The mechanical strengthof the obtained chitosan-based hydrogel is increased along with the increase of the concentration of polyvinyl alcohol. In addition, the hydrogel can be self-repaired in a room-temperature environment, and no stimulation or healing agent is needed. More importantly, the hydrogel has excellent antibacterial performance, and the antibacterial rate is increased along with the increase of the contentof carboxymethyl chitosan. Therefore, the intelligent hydrogel can be applied to the fields of biomedicines and sensors.

Description

technical field [0001] The invention relates to a high-strength, self-repairing antibacterial hydrogel and a preparation method thereof. Background technique [0002] Hydrogel is a three-dimensional network system composed of cross-linked hydrophilic polymers and water, which has a certain ability to absorb and retain water. There are many types of hydrogels. According to the source of hydrogel macromolecules, hydrogels can be divided into three categories: natural gels, synthetic gels, and hybrid gels. Physical hydrogel refers to the hydrogel formed by cross-linking through physical interactions such as hydrogen bonding, metal ion coordination, electrostatic interaction, host-guest interaction, and hydrophobic interaction. Under external environmental stimuli, gel- Sol transformation. Hydrogels have excellent toughness, elasticity and softness, and good biocompatibility, and are widely used in biomedicine, shape memory materials and other fields. Some hydrogels have good...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08F261/04C08F251/00C08F220/06C08F2/48C08L5/08C08L29/04
CPCC08F2/48C08F251/00C08F261/04C08J3/075C08J2329/04C08J2405/08C08F220/06
Inventor 李征征候冰娜李进
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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