Preparation method of novel photo-induced self-repairing nanometer composite hydrogel

A nano-composite, light-induced technology, applied in the field of nano-materials, can solve the problem of limited dynamic bonding of hydrogel self-healing, and achieve the effect of huge application potential and good mechanical strength

Active Publication Date: 2020-06-09
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the current research on self-healing hydrogels is relatively extensive, the dynamic bonding that can be applied to hydrogel self-healing is still relatively limited. In the field of nanocomposite hydrogels, the available nanomaterials are very limited, so It is necessary to invent a new type of self-healing nanocomposite hydrogel based on dynamic bonding to expand the types of nanomaterials that can be used.

Method used

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  • Preparation method of novel photo-induced self-repairing nanometer composite hydrogel
  • Preparation method of novel photo-induced self-repairing nanometer composite hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of functionalized molybdenum disulfide nanosheets

[0023] The functional modifier is added to the molybdenum disulfide nanosheet dispersion, and ultrasonicated for 1 hour at room temperature to obtain a surface-modified metal nanomaterial dispersion; the functional modifier is a compound containing an S atom and a carbon-carbon double bond, preferably N , N-bis (acryloyl) cystamine, the addition amount is 0.5mg. The concentration of the molybdenum disulfide nanosheet dispersion is 1 mg / mL, the concentration of the molybdenum disulfide nanosheet dispersion is 1 mg / mL, and the addition amount is 0.5 ml.

[0024] 2. Preparation of nanocomposite hydrogels

[0025] Add 1 g of hydrophilic monomer N-isopropylacrylamide monomer to the functionalized molybdenum disulfide nanosheet dispersion obtained in step 1, add 15 mg of KPS initiator after ultrasonic dissolution, 20 μL N, N, N, N- Tetramethylethylenediamine was used as a catalyst, and then placed in an ice-...

Embodiment 2

[0027] 1. Preparation of functionalized molybdenum disulfide nanosheets

[0028] Add the functional modifier to the molybdenum disulfide nanosheet dispersion after the adsorption sites have been enlarged, and ultrasonicate for 1 hour at room temperature to obtain a surface-modified metal nanomaterial dispersion; the functional modifier contains S atoms and carbon-carbon double bonds The compound, preferably N,N-bis(acryloyl)cystamine, is added in an amount of 0.5 mg. The concentration of the molybdenum disulfide nanosheet dispersion is 1 mg / mL, the concentration of the molybdenum disulfide nanosheet dispersion is 1 mg / mL, and the addition amount is 0.5 mL.

[0029] 2. Preparation of nanocomposite hydrogels

[0030] Add 1 g of hydrophilic monomer N-isopropylacrylamide monomer to the functionalized molybdenum disulfide nanosheet dispersion obtained in step 1, add 15 mg of KPS initiator after ultrasonic dissolution, 20 μL N, N, N, N- Tetramethylethylenediamine was used as a cat...

Embodiment 3

[0050] 1. Comparing the preparation of molybdenum disulfide nanosheets

[0051] Add a common cross-linking agent to the molybdenum disulfide nanosheet dispersion after expanding the adsorption sites, and sonicate for 1 hour at room temperature to obtain a surface-modified metal nanomaterial dispersion;

[0052] The common crosslinking agent is a compound containing no S atom and carbon-carbon double bond, preferably N,N-bis(acryloyl)cystamine, and the added amount is 0.5 mg. The concentration of the molybdenum disulfide nanosheet dispersion is 1 mg / mL, the concentration of the molybdenum disulfide nanosheet dispersion is 1 mg / mL, and the addition amount is 0.5 mL.

[0053] 2. Preparation of nanocomposite hydrogels

[0054] Add 1 g of hydrophilic monomer N-isopropylacrylamide monomer to the comparative molybdenum disulfide nanosheet dispersion obtained in step 1, add 15 mg of KPS initiator after ultrasonic dissolution, 20 μL N,N,N,N-four Methylethylenediamine was used as a ca...

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Abstract

The invention discloses a preparation method of novel photo-induced self-repairing nanometer composite hydrogel. The high-strength nanometer composite hydrogel is prepared by constructing a functionalized nanometer cross-linking agent by virtue of the coordination effect of unsaturated metal atoms on the surface of a transition metal chalcogenide compound (taking a molybdenum disulfide nanosheet as an example) on S atoms. A brand-new hydrogel self-repairing mechanism is provided on the basis of a dynamic Mo-S bond, and the high-strength nanometer composite hydrogel capable of completing self-repairing under near-infrared light induction is prepared by combining the excellent photo-thermal performance and mechanical performance of molybdenum disulfide.

Description

technical field [0001] The invention relates to a preparation method of a novel light-induced self-repairing nano-composite hydrogel. The involved nano-material is a transition metal chalcogen compound, which belongs to the technical field of nano-materials. Background technique [0002] Hydrogel material is a polymer material that forms a three-dimensional network structure through physical and chemical crosslinking methods. Because it has a large number of hydrophilic groups, it can absorb dozens of times or even hundreds of times more than itself. As a soft and highly water-containing material, hydrogels are widely used in many fields such as sensing and detection, drug release, actuators, and tissue engineering. However, traditional hydrogels have poor mechanical properties due to structural defects, and cannot repair themselves after damage, which ultimately limits the service life and safety of the material. [0003] Nanocomposite hydrogel refers to the introduction o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/54C08J3/075
CPCC08F292/00C08J3/075C08F220/54
Inventor 秦海利朱冉郑炜琼轩婷婷李帅王佳明
Owner HEFEI UNIV OF TECH
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