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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

A method for improving the underwater adhesion ability of hydrogels and related hydrogels and preparation methods thereof belong to the technical field of hydrogels. In the present invention, a dynamic hydrogel containing hydrophobic groups is prepared by cross-linking with the assistance 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 produce self-hydrophobicity under water, repel water molecules, and produce hydrophobic interactions with the substrate. This allows it to quickly adhere to various adhesion surfaces under underwater conditions without the need for additional chemical modifications to the adhesion substrate. , repeated and stable adhesion, especially suitable for direct adhesion to various substrate surfaces and biological tissue surfaces infiltrated by body fluids. The hydrogel of the present invention is simple to prepare, avoids complicated preparation processes and specific environments, and the produced product has long-term stability and is easy to promote and apply.

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 and related hydrogels and their preparation methods. Background technique [0002] Hydrogel has a three-dimensional network structure that mimics the 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 humid environments. Among them, there is also an urgent need for applications related to hydrogels and adhesion, such as the adhesion between hydrogels and biological tissues. Although adhesive hydrogels have found practical applications in biomedical applications, most hydrogels only exhibit good adhesion in dry environments and fail to function in humid or underwater environments due to swelling and hydrogelation. The layer of water molecules formed on the glue su...

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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