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Hydrogel composition with dynamic bond self-healing function as well as preparation method and application of hydrogel composition

A self-healing, hydrogel technology, applied in the field of hydrogel compositions, can solve the problems of complex steps, high cost, and difficulty in application, and achieve the effect of high interface bonding ability and good adhesion

Pending Publication Date: 2022-07-12
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing self-healing systems only form a weak force (hydrogen bonding and electrostatic interaction) with the surface of human tissue at most, and cannot effectively adhere to the surface of the tissue
Common solutions, such as grafting functional groups to polymers, are often complicated and costly, and difficult to apply

Method used

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  • Hydrogel composition with dynamic bond self-healing function as well as preparation method and application of hydrogel composition
  • Hydrogel composition with dynamic bond self-healing function as well as preparation method and application of hydrogel composition
  • Hydrogel composition with dynamic bond self-healing function as well as preparation method and application of hydrogel composition

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Experimental program
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Effect test

preparation example Construction

[0031] Preparation of precursors. Dissolve acrylamide and water-soluble polymer in water to form solution A. Solution B was formed by dissolving the initiator and dynamic crosslinker in water.

[0032] In an optional embodiment, the water-soluble high molecular polymer is a high molecular polymer containing hydroxyl and / or carboxyl groups, preferably one of polyvinyl alcohol, sodium alginate, polyacrylic acid, sodium polyacrylate, and nanocellulose one or a combination of several.

[0033] In an optional embodiment, the mass ratio of acrylamide to the water-soluble polymer may be 1 g: (1-0.1 g), preferably 1 g: (0.5-0.1 g), more preferably 1 g: (0.3-0.1 g) 0.15g). The concentration of acrylamide in solution A may be 100-1000 g / L, and the ratio of acrylamide and water in solution A may be 1 g: (0.001-0.01 L).

[0034] In alternative embodiments, the initiator includes ammonium persulfate, potassium persulfate, azodiisobutylamidine hydrochloride, azobisisobutylimidazoline hy...

Embodiment 1

[0041] (1) Preparation of precursor: Weigh 5g of acrylamide and 2g of polyacrylic acid in 10g of water, stir and dissolve; Weigh 0.1g of ammonium persulfate and 0.01g of 3-acrylamidophenylboronic acid in 1g of water, stir and disperse with ultrasonic waves.

[0042] (2) Preparation of hydrogel composition with dynamic bond self-healing function: adding ammonium persulfate and 3-acrylamidophenylboronic acid solution to acrylamide-polyacrylic acid solution, heating at 70° C. for 10 minutes to obtain polypropylene Sample of amide / polyacrylic acid self-healing hydrogel composition.

[0043] figure 1 A schematic diagram of the pressure-tensile curve of the polyacrylamide / polyacrylic acid self-healing hydrogel composition sample prepared in Example 1 is shown. It can be seen from the figure that the obtained hydrogel has a breaking strength of about 275 kPa and a breaking length of about 1750%.

Embodiment 2

[0045] (1) Preparation of precursor: Weigh 5g of acrylamide, 0.6g of sodium alginate in 9.4g of water, stir and dissolve; Weigh 0.1g of ammonium persulfate and 0.01g of boric acid in 1g of water, stir and ultrasonically disperse.

[0046] (2) Preparation of hydrogel composition with dynamic bond self-healing function: adding ammonium persulfate and boric acid solution to acrylamide-sodium alginate solution, heating at 50°C for 40 minutes to obtain polyacrylamide / sodium alginate Self-healing hydrogel composition samples.

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Abstract

The invention relates to a hydrogel composition with a dynamic bond self-healing function as well as a preparation method and application thereof, and the preparation method of the hydrogel composition with the dynamic bond self-healing function comprises the following steps: (1) dissolving acrylamide and a water-soluble high-molecular polymer in water to form a solution A; dissolving an initiator and a dynamic cross-linking agent in water to form a solution B; and (2) adding the solution B into the solution A, uniformly stirring, pouring into a mold, and carrying out thermal polymerization reaction on an acrylamide monomer and a water-soluble high-molecular polymer through an initiator and a dynamic cross-linking agent under a heating condition to obtain the hydrogel composition with the dynamic bond self-healing function.

Description

technical field [0001] The invention relates to the field of electronic skin, in particular to a hydrogel composition with high stretchability, self-healing and strong adhesion properties. Background technique [0002] Inspired by the ion-conducting properties and sensory functions of skin, artificial ion-skin (hydrogels, ion-gels, ion-elastomers, etc.) based on ion-conduction can realize various sensing functions such as temperature, pressure and strain. Among them, hydrogels are mainly composed of a three-dimensional network structure of hydrophilic polymers, which can swell rapidly in water, and have multiple characteristics such as high water content, good flexibility, and strong permeability. At the same time, the unique network structure of the hydrogel material system also makes it have high ionic conductivity and excellent biocompatibility. However, the skin not only has ion-conducting and sensory functions, but also self-healing after injury to restore its original...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08J3/24C08L33/26C08L33/02C08L5/04C08F220/56C08F230/06C08K3/38C08K5/55
CPCC08J3/075C08J3/246C08F220/56C08J2333/26C08J2433/02C08J2405/04C08K3/38C08K5/55C08K2003/387C08F230/065
Inventor 黄富强张绍宁任大勇赵晨东
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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