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Hydrogel bonding method, hydrogel bonded body and debonding method of hydrogel bonded body

A bonding method, the technology of hydrogel tape, applied in the field of polymer materials, can solve the problems of long-term cost, harsh trigger mechanism, etc., and achieve the effect of strong bonding, simple steps and easy realization

Pending Publication Date: 2021-03-23
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are some methods to achieve the debonding of hydrogels, these methods are all achieved by designing specific chemical systems, which have harsh trigger mechanisms and require a long time cost

Method used

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  • Hydrogel bonding method, hydrogel bonded body and debonding method of hydrogel bonded body
  • Hydrogel bonding method, hydrogel bonded body and debonding method of hydrogel bonded body
  • Hydrogel bonding method, hydrogel bonded body and debonding method of hydrogel bonded body

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0052] A kind of acrylic acid-acrylamide copolymer (PAAc-co-PAAm) hydrogel adhesive tape, preparation method is as follows:

[0053] (1) Mix 12.97g acrylic acid, 4.26g acrylamide, 0.065g water-soluble azo initiator V-50, 0.228g silane coupling agent 3-(trimethoxysilyl) propyl acrylate and 120mL water Uniformly, forming a precursor solution; the precursor solution is irradiated under an ultraviolet lamp for 4 minutes to obtain a polymerization solution;

[0054] (2) Spin-coat the polymerization solution that step (1) obtains on the plexiglass plate, control the spin-coating speed to be 1000rpm, and the spin-coating time is 50s to obtain a pre-polymerized film;

[0055] (3) Place the pre-polymerized film obtained in step (2) in an HCl solution with a pH value of 3.5 for 5 minutes to complete cross-linking; then place the sample in a 65°C oven for 3 hours to obtain the PAAc-co-PAAm water Gel tape with a thickness of 5 μm.

[0056] The first hydrogel and the second hydrogel invo...

Embodiment 1

[0058] A method for bonding hydrogels, specifically comprising the steps of:

[0059] (1) The first hydrogel and the second hydrogel are respectively uniaxially stretched and fixed, and the stretching ratio of the uniaxial stretching is 3, and the stretched first hydrogel and the stretched first hydrogel are obtained. Dihydrogel;

[0060] (2) The stretched first hydrogel obtained in step (1) and the stretched second hydrogel are attached to the two surfaces of the dried hydrogel tape (provided in Preparation Example 1) respectively, and dried The hydrogel tape absorbs water and swells, releases the stretched first hydrogel and the second hydrogel to restore the original shape, and obtains a hydrogel bonded body with an oriented wrinkled structure.

[0061] The schematic diagram of the structure of the hydrogel adhesive body with oriented wrinkled structure obtained in this example is as follows figure 1 Shown, among them, 1-the first hydrogel, 2-the second hydrogel, 3-orient...

Embodiment 2

[0066] A method for bonding hydrogels, the only difference from Example 1 is that the stretching ratios of the first hydrogel and the second hydrogel in step (1) are both 2; In the same manner as in Example 1, a hydrogel bonded body having an oriented wrinkled structure was obtained.

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Abstract

The invention provides a hydrogel bonding method, a hydrogel bonded body and a debonding method of the hydrogel bonded body. The bonding method comprises the following steps: (1) uniaxially stretchingand fixing a first hydrogel to obtain a stretched first hydrogel; and (2) respectively adhering the stretched first hydrogel and a stretched second hydrogel to two surfaces of a hydrogel adhesive tape, and releasing the stretched first hydrogel until the stretched first hydrogel restores to an original shape, thereby obtaining the hydrogel bonded body with an oriented wrinkle structure. Accordingto the bonding method, high-strength bonding of the hydrogel material can be achieved within 5 s, the obtained hydrogel bonded body is debonded as required through asymmetric elimination of an oriented wrinkle structure, operation is easy, and stripping of the hydrogel material can be completed within 15 s. The on-demand bonding and debonding method provided by the invention does not need to usea specific chemical system or a strict triggering mechanism, and has extremely strong operability and excellent universality.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a hydrogel bonding method, a hydrogel bonded body and a debonding method thereof. Background technique [0002] Hydrogel is an ideal biomaterial, which can quickly absorb water, swell and retain a large amount of water in water, and is widely used in tissue engineering, wound dressings, and implant medical devices. At present, great breakthroughs have been made in the strong bonding method between hydrogels, including nanoparticle-based bio-adhesives, bio-glues, and bio-double-sided adhesives. [0003] CN107840970A discloses a double-layer hydrogel which adopts non-covalent interaction to promote interfacial bonding and its preparation method. The preparation method is as follows: attach two pieces of hydrogels with completely the same or different materials together, and then soak Contains Fe 3+ In aqueous solution, through Fe 3+ with COO in hydrogel - ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F230/08C09J7/10C09J133/06C08J3/075C08F222/38C09J5/00C08L33/26
CPCC08F220/06C09J7/10C09J133/02C08J3/075C08F220/56C09J5/00C08J2333/26C08F230/085C08F222/385
Inventor 杨灿辉洪伟李奇张平
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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