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Bilayer hydrogel for promoting interfacial bonding through non-covalent action and preparation method thereof

An interface bonding and hydrogel technology, applied in the field of new bilayer hydrogel and its preparation, can solve the problems of limiting the application prospect of bilayer hydrogel, difficult to control, weak interface bonding, etc., and achieves good application prospect, excellent The effect of interfacial adhesion

Active Publication Date: 2018-03-27
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This multi-step preparation process is complex and difficult to control, and the interface between the two layers is weak, which greatly limits the practical application prospects of bilayer hydrogels in the field of drives.

Method used

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  • Bilayer hydrogel for promoting interfacial bonding through non-covalent action and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve 6mmol acrylamide, 4mmol acrylic acid, 0.05mmol chemical cross-linking agent N,N'-methylenebisacrylamide, 0.01mmol initiator potassium persulfate in 10ml deionized water at room temperature to obtain a clear prepolymer solution. Add the pre-polymerization solution into the mold and seal it, and react at 60° C. for 5 hours to obtain sheet-shaped hydrogel. Two pieces of hydrogels prepared above were assembled together, and then soaked in FeCl with a concentration of 0.1mol / L 3 ·6H 2 In the O aqueous solution for 8 hours, a tightly fitting double-layer hydrogel is obtained, and the interfacial binding force of the double-layer gel can reach 53kPa.

Embodiment 2

[0020] Dissolve 38 mmol of hydroxyethyl methacrylate, 2 mmol of acrylic acid, 0.8 mmol of chemical crosslinker N,N'-methylenebisacrylamide, and 0.2 mmol of initiator potassium persulfate in 10 ml of deionized water at room temperature to obtain a clear pre- poly liquid. Add the pre-polymerization solution into the mold and seal it, and react at 50° C. for 0.1 hour to obtain sheet-shaped hydrogel. Two pieces of hydrogels prepared above were assembled together, and then soaked in FeCl with a concentration of 0.5mol / L 3 ·6H 2 In the O aqueous solution for 15 hours, a tightly fitting double-layer hydrogel is obtained, and the interfacial binding force of the double-layer gel can reach 39kPa.

Embodiment 3

[0022] Dissolve 28mmol acrylamide, 28mmol hydroxyethyl methacrylate, 14mmol acrylic acid, 0.007mmol chemical crosslinker N,N'-methylenebisacrylamide, 0.07mmol initiator ammonium persulfate in 10ml deionized water at room temperature, A clear prepolymer solution was obtained. Add the pre-polymerization solution into the mold and seal it, and react at 70°C for 12 hours to obtain sheet-shaped hydrogel. Two pieces of hydrogels prepared above were assembled together, and then soaked in FeCl with a concentration of 0.01mol / L 3 ·6H 2 In O aqueous solution for 2 hours, a tightly fitting double-layer hydrogel is obtained, and the interfacial binding force of the double-layer gel can reach 46kPa.

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Abstract

The invention discloses bilayer hydrogel for promoting interfacial bonding through non-covalent action and a preparation method thereof. Two hydrogel sheets containing the same or different materialsform bilayer hydrogel with excellent interface bonding strength through a coordination bond of Fe<3+> and COO<-> in the hydrogel. The bilayer hydrogel assembly has excellent interface bonding strengththrough bonding of two layers under coordination bonds. The preparation method is free of complex and uncontrollable traditional processes for preparing bilayer hydrogel. The bilayer hydrogel has a good application prospect.

Description

technical field [0001] The invention relates to a novel double-layer hydrogel and a preparation method thereof, in particular to a double-layer hydrogel which adopts non-covalent action to combine two-layer interfaces and a preparation method thereof. Background technique [0002] Hydrogel is a kind of polymer material with three-dimensional hydrophilic network structure, which has great similarity with biological tissue, which makes it have a wide range of biological application prospects. Hydrogel actuators can undergo large and complex deformations under external environmental stimuli, so they have received increasing attention in the field of smart devices. [0003] The preparation of bilayer hydrogels is one of the most common strategies for constructing hydrogel actuators. The differential response behavior of the two layers to external stimuli can cause anisotropic bending deformation of the hydrogel. However, the existing methods for preparing double-layer hydrogel...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08F220/56C08F220/28C08F220/54C08F220/06C08F222/38
CPCC08F220/20C08F220/56C08J3/075C08J2333/14C08J2333/26C08J2433/14C08J2433/26C08F220/06C08F222/385C08F220/54
Inventor 付俊许祖翔李金徽肖颖高国荣
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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