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Preparation method of a cellulose-based underwater adhesive hydrogel

A cellulose and hydrogel technology, which is used in the preparation of underwater adhesive hydrogels, can solve the problems of weak underwater adhesion and low self-healing efficiency of gels, and achieve good underwater adhesion. effect, excellent adhesion, excellent adhesion

Active Publication Date: 2021-12-07
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of cellulose-based underwater adhesive hydrogel to solve the defects of poor underwater adhesion and low self-healing efficiency in the prior art

Method used

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  • Preparation method of a cellulose-based underwater adhesive hydrogel
  • Preparation method of a cellulose-based underwater adhesive hydrogel
  • Preparation method of a cellulose-based underwater adhesive hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of cellulose-based underwater adhesive hydrogel, comprising the following steps:

[0028] (1) Preparation of cellulose-heteropolyacid complex solution: under stirring, 120 mg of methyl hydroxypropyl cellulose and 20 mg of ferric chloride hexahydrate were dissolved in 3.5 mL of distilled water to form a cellulose mixture; Dissolve 80 mg of tungstosilicic acid in 0.5 mL of distilled water to obtain an aqueous solution of tungstosilicate; slowly drop the aqueous solution of tungstosilicate into the cellulose mixed solution, stir and mix evenly to obtain a cellulose-tungstosilicate precursor;

[0029] (2) Preparation of hydrogel: Take 4 mL of cellulose-tungstosilicate precursor obtained in step (1), add 2.4 g of dimethylaminoethyl methacrylate monomer into it, stir and mix evenly, and then add the monomer Potassium persulfate with a molar mass of 1% was stirred evenly, and reacted at room temperature for 8 hours to obtain a brown-red hydrogel.

Embodiment 2

[0031] A preparation method of cellulose-based underwater adhesive hydrogel, comprising the following steps:

[0032] (1) Preparation of cellulose-heteropolyacid complex solution: under stirring, 120 mg hydroxyethyl cellulose and 20 mg ferric chloride hexahydrate were dissolved in 3.5 mL distilled water to form a cellulose mixture; 80 mg Dissolve tungstosilicic acid in 0.5 mL distilled water to obtain an aqueous tungstosilicic acid solution; slowly drop the aqueous tungstosilicic acid solution into the cellulose mixed solution, stir and mix evenly to obtain a cellulose-tungstosilicate precursor;

[0033] (2) Preparation of hydrogel: Take 4 mL of cellulose-tungstosilicate precursor obtained in step (1), add 2.4 g of dimethylaminoethyl methacrylate monomer into it, stir and mix evenly, and then add the monomer Potassium persulfate with a molar mass of 1% was stirred evenly, and reacted at room temperature for 8 hours to obtain a brown-red hydrogel.

Embodiment 3

[0035] A preparation method of cellulose-based underwater adhesive hydrogel, comprising the following steps:

[0036] (1) Preparation of cellulose-heteropoly acid complex solution: under stirring, 120 mg of methyl hydroxypropyl cellulose and 20 mg of aluminum chloride hexahydrate were dissolved in 3.5 mL of distilled water to form a cellulose mixture; Dissolve 80 mg of tungstosilicic acid in 0.5 mL of distilled water to obtain an aqueous solution of tungstosilicate; slowly drop the aqueous solution of tungstosilicate into the cellulose mixed solution, stir and mix evenly to obtain a cellulose-tungstosilicate precursor;

[0037] (2) Preparation of hydrogel: Take 4 mL of cellulose-tungstosilicate precursor obtained in step (1), add 2.4 g of dimethylaminoethyl methacrylate monomer into it, stir and mix evenly, and then add the monomer Potassium persulfate with a molar mass of 1% was stirred evenly, and reacted at room temperature for 8 hours to obtain a brown-red hydrogel.

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Abstract

The invention discloses a method for preparing a cellulose-based underwater adhesive hydrogel, which includes the following steps: (1) preparing a cellulose-heteropolyacid precursor: dissolving metal cation salts and cellulose in distilled water to form fibers Vegetable mixed solution; in the state of stirring, drop the heteropoly acid aqueous solution into the cellulose mixed solution, stir and mix evenly to obtain the cellulose-heteropoly acid precursor; (2) prepare hydrogel: add to the fiber Add dimethylaminoethyl methacrylate monomer to the element-heteropolyacid precursor, stir and mix evenly, then add a water-soluble initiator, stir and mix, and react at room temperature for 7-10h. The hydrogel provided by the invention has a double-layer interpenetrating network structure, has good underwater adhesion, and has certain self-healing performance and electrical conductivity.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a cellulose-based underwater adhesive hydrogel. Background technique [0002] Hydrogel is a kind of polymer material with a three-dimensional cross-linked network. Based on its structural characteristics, the hydrogel network can absorb a large amount of water and maintain a certain fluidity under the premise of displaying certain mechanical properties. Because the hydrogel is easy to design and modify, and its three-dimensional network structure is similar to the natural extracellular matrix, it has excellent application prospects in the fields of wearable biosensors, wound dressings, tissue engineering, and bioadhesives. However, for traditional hydrogels, due to the lack of suitable interaction sites for covalent and non-covalent interactions, conventional hydrogels exhibit weak adhesion to substrates. Moreover, if there is water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08J3/075C08L51/02C08K3/34C08K3/32C08F251/02C08F220/34
CPCC08F251/02C08J3/075C08J3/243C08J2351/02C08K3/32C08K3/34C08F220/34
Inventor 贾鹏翔陈代君赵小莉卫欣冉
Owner NORTHWEST UNIV
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