Self-repairing multi-photoresponse double-layer supramolecular hydrogel as well as preparation method and application thereof

A supramolecular hydrogel and light-responsive technology, applied in the field of supramolecular chemistry, can solve problems such as application limitations of reversible deformation functions, failure to meet social needs, and lack of self-healing ability to achieve good self-healing performance and low production costs The effect of low, double-layer bond strength is high

Active Publication Date: 2020-12-25
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogel needs to use saline solution as a medium to achieve deformation, and the concentration of saline solution needs to be controlled, which increases the complexity of operation
Moreover, the single reversible deformation function of the hydrogel also greatly limits its application.
[0006] Most of the photoresponsive hydrogel systems in current research are single photoresponse, and there are few studies on reversible discoloration and anisotropic reversible deformation. Most of the systems do not have self-healing ability, which is far from meeting the needs of society.

Method used

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  • Self-repairing multi-photoresponse double-layer supramolecular hydrogel as well as preparation method and application thereof
  • Self-repairing multi-photoresponse double-layer supramolecular hydrogel as well as preparation method and application thereof
  • Self-repairing multi-photoresponse double-layer supramolecular hydrogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0044] (1) Weigh N-isopropylacrylamide (720mg, 6.36mmol), add a certain amount of cyclodextrin monomer into 6ml ultrapure water, stir and mix evenly, move to 0-5°C ice-water bath, add Graphene oxide aqueous dispersion, through argon (Ar 2 ) bubbling for 30 min; weigh a certain amount of potassium persulfate (KPS), dissolve it in 400 μl ultrapure water, add it to the reaction solution, and then add 30 μl N,N,N',N'-tetramethylethylenediamine (TEMED) , to obtain the hydrogel layer 1 prepolymer solution. Quickly inject into the mold (60mm×60mm×1mm) with a syringe to prepare the hydrogel layer 1 . The cross-linked structure of hydrogel layer 1 is as follows figure 1 shown;

[0045] (2) Weigh N-isopropylacrylamide (720mg, 6.36mmol), a certain amount of cyclodextrin monomer, and add acryloyloxyethyltrimethylammonium chloride into 6ml of ultrapure water, stir and mix evenly, Move to the condition of 0~5℃ ice-water bath, blow argon (Ar 2 ) bubbling for 30min; weigh a certain amoun...

Embodiment 4～6

[0050] According to the preparation process and raw material ratio of Examples 1, 2, and 3, only α-cyclodextrin was replaced by β-cyclodextrin, and the double-layer supramolecular hydrogels of Examples 4, 5, and 6 were obtained.

[0051] Performance Testing

[0052] By optimizing the cyclodextrin content in mechanical properties, the mechanical properties of the hydrogels were obtained by testing Examples 1-3. The result is as image 3 As shown, in order to prevent the sample from sliding on the experimental bench, the shape of the hydrogel sample for the compression test is a cylinder. It was found that with the increase of cyclodextrin content, the hydrogel cross-linking density gradually increased, the entanglement between polymer chains was more, and the polymer network was tighter and denser. When it was increased to more than 100 mg, as In the hydrogel of Example 3, cyclodextrin will affect the uniform dispersion of GO in the polymer network, causing the hydrogel to ru...

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Abstract

The invention relates to the technical field of supramolecular chemistry, and discloses a preparation method of self-repairing multi-photoresponse double-layer supramolecular hydrogel, which comprisesthe following steps: (1) reacting N-isopropylacrylamide, cyclodextrin monomer and graphene oxide aqueous dispersion to obtain a hydrogel layer 1; (2) carrying out a reaction on N-isopropylacrylamide,a cyclodextrin monomer and acryloyloxyethyl trimethyl ammonium chloride to obtain a prepolymer solution of the hydrogel layer 2; and (3) injecting the prepolymer solution into a mold to obtain double-layer hydrogel, and soaking the double-layer hydrogel in an ammonium molybdate tetrahydrate solution to finally obtain the double-layer supramolecular hydrogel. According to the hydrogel, physical crosslinking is realized by utilizing host-guest interaction between cyclodextrin and N-isopropylacrylamide isopropyl, tight connection between double-layer hydrogel is also realized through host-guestinteraction, the double-layer bonding strength is high, and the hydrogel has good self-repairing performance, multiple photoresponse deformation discoloration performance and injectable performance.

Description

technical field [0001] The invention belongs to the technical field of supramolecular chemistry, and in particular relates to a self-repairing multi-photoresponsive double-layer supramolecular hydrogel, its preparation method and application. Background technique [0002] Hydrogel refers to a class of polymers formed by physical or chemical cross-linking, which is a soft substance that can absorb a large amount of water and maintain its three-dimensional structure. As an important branch of the hydrogel field, stimuli-responsive hydrogels can respond sensitively to external stimuli (such as temperature, pH, electric field, magnetic field, etc.), and generate morphology (sol-gel), volume (shrink-swell ), shape (shape memory) and color, etc., have been widely used as smart responsive materials. As a stimulation method that can easily adjust the intensity, wavelength and non-contact, light can realize remote non-contact control, and the research on photochromic behavior is als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J7/14G06K19/06C08F251/00C08F220/54C08F220/34C08L51/02
CPCC08J3/075C08J7/14G06K19/06037G06K19/0614C08F251/00C08J2351/02C08J2451/02C08F220/54C08F220/34
Inventor 单国荣高巧峰潘鹏举
Owner QUZHOU RES INST OF ZHEJIANG UNIV
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