Chitosan derivative self-healing hydrogel and preparation method and application thereof

A chitosan derivative and hydrogel technology, applied in the field of materials, can solve the problems of easily broken hydrogel, low mechanical properties and water absorption, short service life, etc. Good biocompatibility and improved stability

Active Publication Date: 2019-05-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of traditional hydrogels such as fragility, short service life, low me

Method used

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  • Chitosan derivative self-healing hydrogel and preparation method and application thereof
  • Chitosan derivative self-healing hydrogel and preparation method and application thereof
  • Chitosan derivative self-healing hydrogel and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Selection of raw materials: by weight of each raw material: 35% hydroxypropyl chitosan, 25% polyvinyl alcohol, 40% acrylamide, ammonium persulfate accounts for 13% of the total mass of acrylamide, oxidized sodium alginate and boric acid The mixture accounts for 3% of the total volume of the composite solution, and tetramethylethylenediamine accounts for 0.2% of the total volume of the composite solution, select raw materials and set aside;

[0033] 2) Weigh hydroxypropyl chitosan in a beaker according to the proportioning ratio, add deionized water at 30° C., stir and dissolve evenly, and obtain a hydroxypropyl chitosan solution with a mass volume percentage of 14%;

[0034] 3) Weigh polyvinyl alcohol in a beaker according to the proportion, seal and stir to dissolve evenly at 90°C, obtain a polyvinyl alcohol solution with a mass volume percentage of 9%, add it to the above-mentioned hydroxypropyl chitosan solution at 35°C, and stir Uniformly obtain the polymer mixed...

Embodiment 2

[0040] 1) Selection of raw materials: by weight of each raw material: hydroxypropyl chitosan 40, polyvinyl alcohol 25, acrylamide 35, ammonium persulfate accounts for 12% of the total mass of acrylamide, oxidized sodium alginate and The mixture of boric acid accounts for 3% of the total volume of the composite solution, and tetramethylethylenediamine accounts for 0.2% of the total volume of the composite solution. The raw materials are selected for subsequent use;

[0041] 2) Weighing hydroxypropyl chitosan in a beaker according to the proportioning ratio, adding deionized water at 30°C, stirring and dissolving evenly, to obtain a hydroxypropyl chitosan solution with a mass volume percentage of 16%;

[0042] 3) Weigh polyvinyl alcohol in a beaker according to the proportion, seal and stir to dissolve evenly at 90°C, obtain a polyvinyl alcohol solution with a mass volume percentage of 9%, add it to the above-mentioned hydroxypropyl chitosan solution at 35°C, and stir Uniformly ...

Embodiment 3

[0048] 1) Selection of raw materials: according to the weight parts of each raw material: 40 hydroxypropyl chitosan, 20 polyvinyl alcohol, 40 acrylamide, ammonium persulfate accounts for 13% of the total mass of acrylamide, oxidized sodium alginate and boric acid The mixture accounts for 3% of the total volume of the composite solution, and tetramethylethylenediamine accounts for 0.2% of the total volume of the composite solution, select raw materials and set aside;

[0049] 2) Weighing hydroxypropyl chitosan in a beaker according to the proportioning ratio, adding deionized water at 30°C, stirring and dissolving evenly, to obtain a hydroxypropyl chitosan solution with a mass volume percentage of 16%;

[0050] 3) Weigh polyvinyl alcohol in a beaker according to the proportion, seal and stir at 90°C to dissolve evenly, obtain a polyvinyl alcohol solution with a mass volume percentage of 8%, add it to the above-mentioned hydroxypropyl chitosan solution at 35°C, and stir Uniforml...

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Abstract

The invention discloses a chitosan derivative self-healing hydrogel and a preparation method and applications thereof. The preparation method of the chitosan derivative self-healing hydrogel includesthe steps of taking and separately dissolving chitosan derivatives and polyvinyl alcohol in deionized water to be then mixed and evenly stirred at a temperature of 30-40 DEG C to obtain a polymer solution, dissolving acrylamide in the deionized water and then adding mixed crosslinking agents therein, adding initiators therein after stirring for 10-15 minutes, adding the mixture into a polymer solution after stirring for 10 to 15 minutes under the protection of nitrogen, fully and evenly stirring the mixture to obtain a composite solution, adding catalysts to the composite solution to be rapidly mixed for 20-60 seconds, and then conducting heat preservation of the composite solution at a temperature of 35-45 DEG C for 8-12 hours obtain the self-healing hydrogel. The prepared chitosan derivative self-healing hydrogel has the advantage of good prospects in the application of Cr6+ (hexavalent chromium) adsorption removal.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a self-healing hydrogel of chitosan derivatives and a preparation method and application thereof. Background technique [0002] Hydrogels are soft and hydrophilic materials and are common candidates for soft tissues. In recent years, self-healing hydrogels with the ability to repair damage have attracted extensive attention. Self-healing hydrogel materials have the characteristics of self-healing damage. Because their network structure and original characteristics are maintained, they can increase the safety of materials used and prolong the life of materials. They are intelligent new materials with damage management properties. The research on it mainly focuses on non-covalent reactions and dynamic covalent reactions, the former involves hydrogen bonds, ionic bonds, supramolecular interactions and chain entanglements, while the latter involves boronate bonds, disu...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08J3/24C08L5/08C08L29/04C08L33/26C08L5/04C08K3/38B01J20/24B01J20/28C02F1/28B01J20/30C02F101/22
Inventor 樊李红曹继龙王程何广华
Owner WUHAN UNIV OF TECH
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