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Hydrogel adhesive capable of being repeatedly used and not damaging surface of substrate, and preparation method and application of hydrogel adhesive

A technology of hydrogel glue and substrate surface, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve problems such as weak adhesive force, difficult to remove, and damage substrates, and achieve The effect of increasing durability

Active Publication Date: 2019-08-20
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the adhesive has been commercialized, most commercially available products (such as general epoxy resin adhesives, polyacrylate adhesive 502) have weak adhesion on PTFE, and their Adhesive behavior is usually irreversible and can only be used once
During their use, they are difficult to remove and damage the substrate during removal. In addition, their adhesive force is very insensitive to external stimuli

Method used

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  • Hydrogel adhesive capable of being repeatedly used and not damaging surface of substrate, and preparation method and application of hydrogel adhesive
  • Hydrogel adhesive capable of being repeatedly used and not damaging surface of substrate, and preparation method and application of hydrogel adhesive
  • Hydrogel adhesive capable of being repeatedly used and not damaging surface of substrate, and preparation method and application of hydrogel adhesive

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: the synthesis of hydrogel adhesive

[0039] Mix 10 g of acrylamide, 4 g of hydroxyethyl methacrylate, 30 g of water, 0 μL of HT acetone solution (0.04 g / mL acetone solution), 0.1 g of ammonium persulfate, and 5 μL of tetramethylethylenediamine (TEMED) to obtain a hydrogel Glue the solution of the adhesive, and then pour it into the mold to undergo free radical polymerization to form a hydrogel. The free radical polymerization conditions are: 90 ° C for 3 minutes, followed by sufficient polymerization at room temperature for 2 hours. The water content of the obtained hydrogel adhesive was 68.2%.

Embodiment 2

[0041] Mix 10 g of acrylamide, 4 g of hydroxyethyl methacrylate, 30 g of water, 20 μL of HT acetone solution (0.04 g / mL acetone solution), 0.1 g of ammonium persulfate, and 5 μL of tetramethylethylenediamine (TEMED) to obtain a hydrogel Glue the solution of the adhesive, and then pour it into the mold to undergo free radical polymerization to form a hydrogel. The free radical polymerization conditions are: 90 ° C for 3 minutes, followed by sufficient polymerization at room temperature for 2 hours. The water content of the obtained hydrogel adhesive was 68.2%.

Embodiment 3

[0043] Mix 10 g of acrylamide, 4 g of hydroxyethyl methacrylate, 30 g of water, 40 μL of HT acetone solution (0.04 g / mL acetone solution), 0.1 g of ammonium persulfate, and 5 μL of tetramethylethylenediamine (TEMED) to obtain a hydrogel Glue the solution of the adhesive, and then pour it into the mold to undergo free radical polymerization to form a hydrogel. The free radical polymerization conditions are: 90 ° C for 3 minutes, followed by sufficient polymerization at room temperature for 2 hours. The water content of the obtained hydrogel adhesive was 68.2%.

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Abstract

The invention belongs to the field of hydrogel, and discloses a hydrogel adhesive capable of being repeatedly used and not damaging the surface of a substrate, and a preparation method and applicationof the hydrogel adhesive. The hydrogel adhesive which can be repeatedly used and does not damage the surface of the base material is synthesized by monomer methyl methacrylate and acrylamide, and a cross-linking agent hexamethylene diisocyanate-trimer through free radical polymerization in water. According to the invention, the simple commercially available monomers which do not need chemical modification are used, and under the condition of not changing the composition, the self-repairing high-tensile and self-adhesive hydrogel is obtained by regulating the molecular chain length of the hydrogel polymer through changing the polymerization temperature. The self-healing property of the prepared hydrogel is important, and especially when the hydrogel is used for bearing application. The internal self-repairing ability of the hydrogel during damage will increase durability, the service life, reliability and safety of the hydrogel.

Description

technical field [0001] The invention belongs to the field of hydrogels, and in particular relates to a hydrogel adhesive which can be used repeatedly and does not damage the surface of a base material, as well as its preparation and application. Background technique [0002] Polymer hydrogel is a three-dimensional network structure material formed by cross-linking hydrophilic polymer chains. It is an ideal biocompatible material because it swells in water and has a soft texture similar to biological tissue. By controlling the degree of cross-linking of the three-dimensional network of the hydrogel, adjusting the functional groups on the polymer chain, and changing the environmental conditions, the swelling degree and adhesive properties of the hydrogel can be adjusted. Therefore, polymer hydrogels can be widely used in fields such as contact lenses, burn dressings, drug-controlled release materials, and medical adhesives. At present, most research work mainly focuses on the...

Claims

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Application Information

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IPC IPC(8): C09J133/26C09J175/04C08F220/56C08F220/20C08G18/79C08G18/62
CPCC08F220/56C08G18/6266C08G18/79C09J133/066C09J175/04C08F220/20
Inventor 徐秀彬陈睿吴旭于丹凤王正平刘敏换肖创洪黄建嘉
Owner GUANGZHOU UNIVERSITY
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