High-strength self-healing hydrogel and preparation method thereof

A hydrogel, high-strength technology, applied in the field of materials, can solve the problems of complicated equipment and instruments, difficult operation, multiple raw materials, etc., and achieve the effects of increasing the healing rate, increasing the hydrogen bond density, and increasing the hydrogen bond density.

Pending Publication Date: 2022-07-12
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above methods require a lot of energy and more raw materials, and the equipment and instruments used are complicated and difficult to operate.

Method used

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  • High-strength self-healing hydrogel and preparation method thereof
  • High-strength self-healing hydrogel and preparation method thereof
  • High-strength self-healing hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1 (FP1):

[0048] (1) Mix 2.132g of acrylamide, 4.189g of choline chloride, 2.162g of acrylic acid, and 0.085g of N,N-methylenebisacrylamide, stir in an oil bath at 70°C until a transparent and clear liquid is formed, and let stand Cool to room temperature to obtain room temperature deep eutectic solvent liquid;

[0049] (2) 0.043g potassium persulfate and 0.022g β-cyclodextrin were successively added to the room temperature deep eutectic solvent liquid obtained in step (1) to form a mixture solution, and then the formed mixture solution was transferred into a test tube, using electric The soldering iron is heated at the upper end of the reactor, so that the initiator is decomposed by heat to initiate the reaction. After the thermal initiation reaction begins, the heat source is withdrawn until all the raw materials in the entire reactor are converted into polymer gel;

[0050] (3) soaking and washing the polymer gel obtained in step (2) with distilled water to...

Embodiment 2

[0052] Example 2 (FP2):

[0053] (1) Mix 2.132g of acrylamide, 4.189g of choline chloride, 2.162g of acrylic acid, and 0.085g of N,N-methylenebisacrylamide, stir in an oil bath at 70°C until a transparent and clear liquid is formed, and let stand Cool to room temperature to obtain room temperature deep eutectic solvent liquid;

[0054] (2) 0.043g potassium persulfate and 0.043g β-cyclodextrin were successively added to the room temperature deep eutectic solvent liquid obtained in step (1) to form a mixture solution, and then the formed mixture solution was transferred into a test tube, using electric The soldering iron is heated at the upper end of the reactor, so that the initiator is decomposed by heat to initiate the reaction. After the thermal initiation reaction begins, the heat source is withdrawn until all the raw materials in the entire reactor are converted into polymer gel;

[0055] (3) soaking and washing the polymer gel obtained in step (2) with distilled water to...

Embodiment 3

[0057] Example 3 (FP3):

[0058] (1) Mix 2.132g of acrylamide, 4.189g of choline chloride, 2.162g of acrylic acid, and 0.085g of N,N-methylenebisacrylamide, stir in an oil bath at 70°C until a transparent and clear liquid is formed, and let stand Cool to room temperature to obtain room temperature deep eutectic solvent liquid;

[0059] (2) 0.043g potassium persulfate and 0.087g β-cyclodextrin were successively added to the room temperature deep eutectic solvent liquid obtained in step (1) to form a mixture solution, and then the formed mixture solution was transferred into a test tube, using an electric The soldering iron is heated at the upper end of the reactor, so that the initiator is decomposed by heat to initiate the reaction. After the thermal initiation reaction begins, the heat source is withdrawn until all the raw materials in the entire reactor are converted into polymer gel;

[0060] (3) soaking and washing the polymer gel obtained in step (2) with distilled water...

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Abstract

The preparation method comprises the following steps: mixing a hydrogen bond acceptor, a hydrogen bond donor and a cross-linking agent, and then mixing and stirring at 70-100 DEG C until transparent and clear liquid is obtained, so as to obtain a deep eutectic solvent; sequentially adding an initiator and beta-cyclodextrin into the deep eutectic solvent at the temperature not lower than 35 DEG C, and uniformly stirring to form a mixture solution; transferring the formed mixture solution into a tubular reactor, heating the reactor by adopting a heat source to initiate a polymerization reaction, and then evacuating the heat source until the deep eutectic solvent liquid in the whole reactor is completely converted into polymer gel; soaking and washing the obtained polymer gel with distilled water, and then freeze-drying to obtain beta-cyclodextrin filled hydrogel; the density of hydrogen bonds in the hydrogel is increased by adding the filler, so that the maximum compressive strength of the hydrogel is increased while the healing rate and the healing speed of the hydrogel are increased.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a self-healing hydrogel and a preparation method thereof. Background technique [0002] Traditional self-healing hydrogels have slow healing speed and harsh conditions, and most hydrogels cannot have the characteristics of high healing rate and high strength at the same time. The low mechanical strength limits the pressure-bearing applications of self-healing hydrogels for stress-bearing applications such as cartilage and tissue engineering scaffolds. However, hydrogels with high mechanical strength and low self-healing properties cannot heal in time when the material is damaged, reducing the life of the material. [0003] The self-healing rate of hydrogels mainly depends on the dynamic bonds in the gel network. Dynamic bonds are mainly divided into dynamic non-covalent bonds and dynamic covalent bonds. The hydrogels constructed by dynamic non-covalent bonds have ultra-high pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08F251/00C08F220/06C08F220/56C08F222/38C08L51/02
CPCC08J3/075C08F251/00C08J2351/02C08F220/06C08F220/56C08F222/385Y02P20/141
Inventor 李彬周梦静徐晓佳郝文瑞刘积桢胡志刚
Owner WUHAN POLYTECHNIC UNIVERSITY
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