Preparation method of high-strength composite hydrogel

A composite hydrogel, high-strength technology, applied in the field of self-healing hydrogel preparation, can solve the problems of poor strength and toughness, limit the application range of hydrogel, weak external mechanical force resistance, etc., and achieve mild reaction conditions , Excellent mechanical properties, good water absorption effect

Active Publication Date: 2021-07-27
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The strength and toughness of most hydrogels are poor, and their resistance to external mechanical forces is weak, which limits the application range of hydrogels to some extent.

Method used

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  • Preparation method of high-strength composite hydrogel
  • Preparation method of high-strength composite hydrogel

Examples

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Embodiment 1

[0024] The specific preparation method is: (1) Weigh 0.02mol 1-vinylimidazole and 0.01mol 1,6-dibromohexane into a flask containing 15mL of methanol, stir and mix evenly under N 2 Under protection, the mixture was stirred and reacted in an oil bath at 60°C for 15 hours, and left to cool at room temperature. After cooling, the reaction product was slowly dropped into a sufficient amount of ether, washed, filtered, and vacuum-dried at 40°C to obtain a crosslinking agent A.

[0025] (2) Weigh 1mmol of 3-[2-(methacryloxy)ethyl]trimethylammonium]propane-1-sulfonate (MPS), 4mmol of 1-vinyl-3-ethylimidazole Bromide salt (VIM), 2 mg photoinitiator 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure-2959) and 0.013 g crosslinker A were added to 1.5 g water. Stir magnetically for 10 minutes, blow nitrogen gas into the system after the components are uniformly dispersed, seal and ultrasonically treat until mixed evenly, transfer to a UV light box, irradiate and react under 29...

Embodiment 2

[0028] The specific preparation method is as follows: (1) Weigh 0.02mol 1-vinylimidazole and 0.01mol 1,4-dibromobutane into a flask containing 15mL N,N-dimethylformamide, magnetically stir and mix evenly, N 2 Under protection, the mixture was stirred and reacted in an oil bath at 60°C for 24 hours, and left to cool at room temperature. After cooling, the reaction product was slowly dropped into a sufficient amount of petroleum ether, washed, filtered, and vacuum-dried at 40°C to obtain a crosslinking agent A.

[0029] (2) Weigh 2mmol of 3-[2-(methacryloyloxy)ethyl]trimethylammonium]propane-1-sulfonate (MPS), 4mmol of 1-vinyl-3-butylimidazole Bromide salt, 2 mg photoinitiator 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure-2959) and 0.02 g crosslinker A were added to 1.5 g water. Stir magnetically for 10 minutes, blow nitrogen gas into the system after the components are uniformly dispersed, seal and ultrasonically treat until mixed evenly, transfer to a UV lig...

Embodiment 3

[0032] The specific preparation method is: (1) Weigh 0.02mol 1-vinylimidazole and 0.01mol 1,10-dibromodecane into a flask containing 15mL N,N-dimethylformamide, magnetically stir and mix evenly, and N 2 Under protection, the mixture was stirred and reacted in an oil bath at 60°C for 24 hours, and left to cool at room temperature. After cooling, the reaction product was slowly dropped into a sufficient amount of petroleum ether, washed, filtered, and vacuum-dried at 40°C to obtain a crosslinking agent A.

[0033] (2) Weigh 2mmol of 3-[2-(methacryloyloxy)ethyl]trimethylammonium]propane-1-sulfonate (MPS), 3mmol of 1-vinyl-3-hexylimidazolium bromide Salt, 2 mg photoinitiator 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure-2959) and 0.01 g crosslinker A were added to 1.5 g water. Stir magnetically for 10 minutes, blow nitrogen gas into the system after the components are uniformly dispersed, seal and ultrasonically treat until mixed evenly, transfer to a UV light b...

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Abstract

The invention provides a preparation method of high-strength composite hydrogel. The preparation method comprises the following steps: firstly, carrying out a coupling reaction on 1-vinyl imidazole and a monomer A (1, 2-dibromoethane, 1, 3-dibromopropane, 1, 4-dibromobutane and the like) to obtain a cross-linking agent A, then adding 3-[2-(methacryloyloxy) ethyl] trimethylammonium] propane-1-sulfonate (MPS), a monomer B (vinyl-containing imidazole bromide), the cross-linking agent A and a water-soluble photoinitiator into water, under the protection of N2, carrying out ultraviolet light induced polymerization reaction to establish covalent bond cross-linking and ionic interaction polyion liquid hydrogel, soaking the polyion liquid hydrogel by adopting a metal ion salt solution, and chelating metal ions with imidazole active sites in the soaking process to obtain the high-strength composite hydrogel. The hydrogel prepared by the method has excellent self-repairing property and mechanical property, is high in antibacterial property, and has potential application value in the aspects of bioengineering, metal catalysis and the like.

Description

technical field [0001] The invention relates to a high-strength composite hydrogel, in particular to a preparation method of a high-strength double-network self-repairing hydrogel. Background technique [0002] Hydrogels are materials with a three-dimensional network structure formed by chemically or physically cross-linking hydrophilic polymers. Hydrogels have the characteristics of hydrophilicity, high water content, and stimuli responsiveness. By introducing functional monomers, polymers, or loaded small molecules, hydrogels can be endowed with more functionality. They are used in biomedicine and metal catalysis. field has a wide range of applications. The strength and toughness of most hydrogels are poor, and their resistance to external mechanical forces is weak, which limits the application range of hydrogels to some extent. The preparation of hydrogels with better mechanical properties through relatively simple methods has always been one of the main problems that r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08F226/06C08F220/38C08F2/48C08K3/16C08L39/04
CPCC08J3/075C08F226/06C08F2/48C08J2339/04C08K3/16C08K2003/168C08F220/387
Inventor 王文嫔王炜杰张慧敏李忠成
Owner QINGDAO UNIV OF SCI & TECH
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