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Hydrogel-elastomer complex as well as preparation method and application thereof

A hydrogel and elastomer technology, applied in the field of hydrogel-elastomer composite and its preparation, can solve the shape distortion of the composite, the loss of water in the hydrogel, the inability to prepare the hydrogel-elastomer composite, etc. problem, to achieve the effect of improving the bonding strength and avoiding shape distortion

Active Publication Date: 2021-03-12
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the bonding strength of the hydrogel to the elastomer, but the process of pre-curing and UV-curing takes several hours, which leads to severe loss of water in the hydrogel and distortion of the shape of the final composite.
[0005] In addition, in order to reduce the evaporation of water during the curing process of the hydrogel, it is often necessary to use a mold to reduce the contact between the hydrogel precursor solution and the air (such as covering the solution with a mold), but it is impossible to prepare a hydrogel with a specific profile. - Elastomeric composite, needs to be trimmed or laser cut
The cutting accuracy is low, and the high-energy laser can easily cause water evaporation, which will lead to product shape distortion

Method used

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  • Hydrogel-elastomer complex as well as preparation method and application thereof
  • Hydrogel-elastomer complex as well as preparation method and application thereof
  • Hydrogel-elastomer complex as well as preparation method and application thereof

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Effect test

Embodiment 1

[0061] This embodiment provides a method for preparing a hydrogel-elastomer composite, comprising the following steps:

[0062] (1) Carry out partial plasma etching treatment to the surface of hydrophobic elastomer substrate (PDMS-184 of Dow Corning Company), the plasma that adopts is oxygen plasma, and intensity is 30Pa, and etching time is 10s, forms circular (diameter 4.5mm) hydrophilic area;

[0063] (2) Add the hydrogel precursor solution dropwise on the hydrophilic region obtained in step (1) (the volumes added are 4 μL, 8 μL, 12 μL, 16 μL, 20 μL, 24 μL, 30 μL), and the hydrogel precursor solution spontaneously Covering the hydrophilic region to form droplets with a certain curved surface profile;

[0064] Among them, the preparation method of the hydrogel precursor solution is as follows: 1mL acrylamide solution (8mol / L), 1mL photoinitiator LAP (concentration: 0.05wt%), 32μL cross-linking agent N,N'-methylenebis Acrylamide (MBAA, 0.1mol / L) and 24 μL of silane coupling...

Embodiment 2

[0068] This embodiment provides a method for preparing a hydrogel-elastomer composite, comprising the following steps:

[0069] (1) Perform partial plasma etching treatment on the surface of the hydrophobic elastomer substrate (PDMS-184), the plasma used is oxygen plasma, the intensity is 30Pa, the etching time is 10s, and a circular (diameter 6mm) is formed. Hydrophilic area;

[0070] (2) Add the hydrogel precursor solution dropwise on the hydrophilic region obtained in step (1) (the volumes added are 10 μL, 20 μL, 30 μL, 40 μL, 50 μL, 60 μL, 80 μL), and the hydrogel precursor solution spontaneously Covering the hydrophilic region to form droplets with a certain curved surface profile;

[0071] Among them, the preparation method of the hydrogel precursor solution is as follows: 1mL acrylamide solution (8mol / L), 1mL photoinitiator LAP (concentration is 0.05wt%), 32μL crosslinking agent MBAA (0.1mol / L) and 24μL The silane coupling agent γ-methacryloxypropyltrimethoxysilane is...

Embodiment 3

[0075] This embodiment provides a zoom microlens matrix (4 * 4), and its preparation method is as follows:

[0076] (1) Perform partial plasma etching treatment on the surface of the hydrophobic elastomer substrate (PDMS-184), the plasma used is oxygen plasma, the intensity is 30Pa, the etching time is 10s, and the formation is arranged in a 4×4 matrix The circular hydrophilic region;

[0077] Among them, the diameters of the same row of hydrophilic regions are the same, and the diameters of the first row to the fourth row of hydrophilic regions are 4.5mm, 4.5mm, 6mm, and 6mm respectively;

[0078] (2) Add the hydrogel precursor solution dropwise on the hydrophilic regions obtained in step (1) (the amount of the same row of hydrophilic regions is the same, and the volumes of the first row to the fourth row of hydrophilic regions are respectively 10 μL , 15 μL, 15 μL, 20 μL), the hydrogel precursor solution spontaneously covers the hydrophilic region, forming droplets with a c...

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Abstract

The invention provides a hydrogel elastomer complex as well as a preparation method and application thereof. The preparation method of the hydrogel elastomer complex comprises the following steps: carrying out local plasma etching treatment on the surface of a hydrophobic elastomer substrate to form a hydrophilic region with a preset shape; dropwise adding a hydrogel precursor solution on the hydrophilic region, and enabling the hydrogel precursor solution to be spontaneously paved on the hydrophilic region to form liquid drops with curved surface contours; and curing the liquid drops to obtain hydrogel, so as to form the hydrogel elastomer complex. According to the preparation method provided by the invention, controllable hydrogel elastomer complexes with different curved surface contours can be prepared on the elastomer without use of a mold or isolation of oxygen; the obtained hydrogel has a high-fidelity contour and the hydrogel elastomer complexes have relatively high bonding strength. In addition, the hydrogel based on the adjustable contour can be widely applied to zoom microlenses or anti-counterfeiting light-emitting patterns and the like.

Description

technical field [0001] The invention belongs to the technical field of flexible composite materials, and in particular relates to a hydrogel-elastomer composite and its preparation method and application. Background technique [0002] The integrated body of hydrogel-elastomer can be widely used in the fields of biomedical equipment, optoelectronic devices, microfluidic chips, flexible circuits, bio-integrated electronics, or soft robots. Specific examples include artificial muscles, artificial skin, artificial Axons, hydraulic actuators, smooth and antifouling coatings, soft energy integrators, and more. The integrated hydrogel-elastomer system requires both the hydrogel and the elastomer to be flexible, stretchable, and sometimes even transparent. Since the hydrogel is a three-dimensional network polymer material with a water content of more than 70%, and the elastomer is usually an oily and hydrophobic three-dimensional network polymer material, there is a great material ...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08J7/12C08L83/04C08F220/56C08F222/38C08F230/08C08F2/48G02B1/04G09F13/20
CPCC08J7/00C08J7/123C08J7/12C08F220/56C08F2/48G02B1/041G09F13/20C08J2383/04C08J2433/26C08F222/385C08F230/085
Inventor 杨灿辉张平李奇王宏洲李啸天何耘丰
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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