A method of improving the underwater adhesion ability of hydrogel and related hydrogel and its preparation method

A technology of adhesion ability and hydrogel, which is applied to a method of improving the underwater adhesion ability of hydrogel and the related field of hydrogel and its preparation, can solve the problems of poor adhesion of hydrogel materials, and achieve The preparation method is simple, easy to popularize and apply, avoiding the effect of preparation process and specific environment

Active Publication Date: 2021-07-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of poor underwater adhesion of hydrogel materials in the prior art, the present invention provides a method for improving the underwater adhesion of hydrogels and related hydrogels and preparation methods thereof. The hydrophobic groups of the gel are distributed on the surface, so that it can adhere to various surfaces based on the non-specific effect of hydrophobic interaction. It can still adhere quickly and reversibly under water, with repeated adhesion and long-term stability.

Method used

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  • A method of improving the underwater adhesion ability of hydrogel and related hydrogel and its preparation method
  • A method of improving the underwater adhesion ability of hydrogel and related hydrogel and its preparation method
  • A method of improving the underwater adhesion ability of hydrogel and related hydrogel and its preparation method

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preparation example Construction

[0040] The invention provides a method for preparing a hydrogel with stable non-specific underwater adhesion, which is characterized in that it comprises the following steps:

[0041] (1) Cross-linking under the action of surfactants to prepare dynamic hydrogels containing hydrophobic groups;

[0042] (1) The dynamic hydrogel containing the hydrophobic group is placed in the non-main group metal ion solution environment, so that the hydrophobic group in the dynamic hydrogel migrates to the surface of the hydrogel; wherein the metal ion solution The concentration is 0.03-0.3 mol / L, and the treatment time is 0.5-2 hours; after the treatment is completed, it is washed, so that the hydrogel with stable non-specific and strong adhesion ability under water is obtained.

[0043] The specific mechanism of action is described as follows:

[0044] When the dynamic hydrogel is immersed in the non-main group ion solution, the surfactant in the dynamic hydrogel network will diffuse from t...

Embodiment 1

[0047] This example provides a method for preparing a hydrogel with stable non-specific underwater adhesion ability, and the specific operations are as follows:

[0048] Step 1: preparation of dynamic hydrogel;

[0049] (1) Disperse monomers containing hydrophobic groups under the action of surfactants:

[0050] At 40°C, weigh 2.12g of sodium dodecanesulfonate and dissolve it in 30ml of 0.12mol / L sodium chloride solution, stir well until the solution is clear and transparent, then weigh 0.26g of octadecyl methacrylate and add it to the above solution , fully stirred until the solution is transparent and clear, to obtain a micellar dispersion loaded with octadecyl methacrylate monomer;

[0051] (2) Preparation of double cross-linked dynamic hydrogel network by free radical copolymerization;

[0052] Weigh 1.5g of acrylamide, 0.003g of N,N-methylenebisacrylamide, 0.005g of ammonium persulfate, add it to the micellar dispersion prepared in the previous step, stir well until it ...

Embodiment 2

[0062] This example provides a method for preparing a hydrogel with stable non-specific underwater adhesion ability, and the specific operations are as follows:

[0063] Step 1: preparation of dynamic hydrogel;

[0064] (1) Disperse monomers containing hydrophobic groups under the action of surfactants:

[0065] At 40°C, weigh 2.12g of sodium dodecanesulfonate and dissolve it in 30ml of 0.12mol / L sodium chloride solution, stir well until the solution is clear and transparent, then weigh 0.39g of octadecyl methacrylate and add it to the above solution , fully stirred until the solution is transparent and clear, to obtain a micellar dispersion loaded with octadecyl methacrylate monomer;

[0066] (2) Preparation of double cross-linked dynamic hydrogel network by free radical copolymerization:

[0067] Weigh 1.5g of acrylamide, 0.003g of N,N-methylenebisacrylamide, 0.005g of ammonium persulfate, add it to the micellar dispersion prepared in the previous step, stir well until it ...

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Abstract

The invention discloses a method for improving the underwater adhesion ability of a hydrogel, a related hydrogel and a preparation method thereof, and belongs to the field of hydrogel technology. In the present invention, the dynamic hydrogel containing hydrophobic groups is prepared by cross-linking under the auxiliary action of surfactant, and then the hydrogel is soaked in a non-main group metal ion solution with a concentration of 0.03-0.3 mol / L for a treatment time of 0.5 ~2 hours, after the above treatment, the hydrogel can automatically adjust the interface to form a hydrophobic surface. The hydrogel can generate self-hydrophobic effect under water, displace water molecules, and generate hydrophobic interaction with the substrate, so that it can achieve rapid adhesion on various adhesive surfaces under underwater conditions without additional chemical modification of the adhesive substrate. , Repeated and stable adhesion, especially for direct adhesion to various substrate surfaces and biological tissue surfaces infiltrated by body fluids. The hydrogel of the invention is simple to prepare, avoids complicated preparation techniques and specific environments, and the prepared product has long-term stability, which is convenient for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of hydrogels, and in particular relates to a method for improving the underwater adhesion ability of hydrogels, related hydrogels and a preparation method thereof. Background technique [0002] Hydrogel has a three-dimensional network structure imitating extracellular matrix, and has bright application prospects in many biomedical related fields such as tissue engineering, wound dressings, biomedical equipment, and underwater soft robots in wet environments. Among them, there is also an urgent need in the application of hydrogels and adhesion, such as the adhesion between hydrogels and biological tissues. Although adhesive hydrogels have been practically used in biomedical applications, most hydrogels only show good adhesion in dry environments, and in wet or underwater environments due to swelling and hydraulic coagulation. The water molecule layer formed on the surface of the glue will significantly reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/14C08J5/18C08J3/24C08J3/075C08L33/26C08L33/08C08F220/56C08F222/38C08F120/18
CPCC08F120/18C08F220/56C08J3/075C08J3/246C08J5/18C08J7/14C08J2333/26C08J2433/08C08F222/385
Inventor 崔家喜韩璐
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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