Microgel reinforced dual-network hydrogel and preparation method thereof

A hydrogel and double-network technology, applied in the field of microgel-enhanced double-network hydrogel and its preparation, can solve problems such as complex process, difficulty in controlling monomer molar ratio, and gap in mechanical properties, and achieve compression-swelling time Effect

Inactive Publication Date: 2019-12-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the synthesis of double network (DN) hydrogels is usually obtained by a two-step method, the process of swelling, diffusion and two-step initiation of polymerization is involved in the synthesis. These processes are complex, time-consuming and difficult to control the first network and The molar ratio of the monomers of the second network still has a large gap in the mechanical properties of each batch of products, and due to the two-step synthesis of the double network hydrogel, it is demanding on the application field

Method used

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  • Microgel reinforced dual-network hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Dissolve 2.07g of 2-acrylamide-2-methylpropanesulfonic acid, 0.062g of N,N-methylenebisacrylamide, 0.027g of potassium persulfate and 0.029g of acrylamide into 10mL of water, and react at a temperature of 60°C 3h, take out the formed first network hydrogel, dry it, and break it into powder. Then 15g of acrylamide, 0.05g of potassium persulfate and 0.017g of N,N-methylenebisacrylamide were dissolved in 100mL of water, and the hydrogel powder obtained by grinding was mixed with the prepared monomer solution at a ratio of 1:45. The reaction was carried out at 60°C for 3 h to prepare a high-strength double network hydrogel.

Embodiment 2

[0017] Dissolve 2.07g of 2-acrylamide-2-methylpropanesulfonic acid, 0.062g of N,N-methylenebisacrylamide, 0.027g of potassium persulfate and 0.029g of acrylamide into 10mL of water, and react at a temperature of 60°C 3h, take out the formed first network hydrogel, dry it, and break it into powder. Then 15g of acrylamide, 0.05g of potassium persulfate and 0.017g of N,N-methylenebisacrylamide were dissolved in 100mL of water, and the hydrogel powder obtained by grinding was mixed with the prepared monomer solution at a ratio of 1:41. The reaction was carried out at 60°C for 3 h to prepare a high-strength double network hydrogel.

Embodiment 3

[0019] Dissolve 2.07g of 2-acrylamide-2-methylpropanesulfonic acid, 0.062g of N,N-methylenebisacrylamide, 0.027g of potassium persulfate and 0.029g of acrylamide into 10mL of water, and react at a temperature of 60°C 3h, take out the formed first network hydrogel, dry it, and break it into powder. Then 15g of acrylamide, 0.05g of potassium persulfate and 0.017g of N,N-methylenebisacrylamide were dissolved in 100mL of water, and the hydrogel powder obtained by grinding was mixed with the prepared monomer solution at a ratio of 1:43. The reaction was carried out at 60°C for 3 h to prepare a high-strength double network hydrogel.

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Abstract

The invention discloses a microgel reinforced dual-network hydrogel and a preparation method thereof, and solves the problem that the performance of each batch of products is not uniform due to the fact that the monomer molar ratio of a first network to a second network is difficult to control in an existing two-step method. The preparation method comprises the following steps: dissolving 2-acrylamide-2-methylpropanesulfonic acid, N, N-methylene bisacrylamide, potassium persulfate and acrylamide, carrying out a reaction, taking out a formed first network hydrogel, drying the first network hydrogel, and crushing the first network hydrogel into powder; dissolving acrylamide, potassium peroxodisulfate and N, N-methylene bisacrylamide, mixing the hydrogel powder obtained by grinding with a prepared monomer solution, and reacting for 3 hours at the temperature of 60 DEG C to obtain the microgel reinforced dual-network hydrogel. According to the preparation method, the swelling time of the single-network hydrogel is greatly shortened, the swelling process only needs a short time, and the defect that specific shapes cannot be formed due to the fact that the first-network hydrogel is difficult to creep in an existing two-step method is overcome.

Description

technical field [0001] The invention belongs to the field of hydrogels, and in particular relates to a microgel-enhanced double-network hydrogel and a preparation method thereof. Background technique [0002] Hydrogels (hydrogels) are a class of water-based polymers, three-dimensional networks of hydrophilic polymers with chemical or physical cross-linking structures. Due to their hydrophilic cross-linking networks, hydrogels can absorb a large amount of water. But insoluble in water, they can maintain a certain shape and three-dimensional network structure in water and swell rapidly. Due to these unique structures, hydrogels are widely used in many fields, such as medical treatment, medicine, tissue engineering, etc. [0003] However, due to the insufficient mechanical strength of traditional hydrogels, its application is limited. Researchers have developed some new types of high-strength hydrogels, such as topological (TP) hydrogels, double network (DN) hydrogels, macromo...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L33/24C08L33/26C08F220/58C08F220/56C08F222/38
CPCC08F220/56C08F220/58C08J3/075C08J2333/24C08J2333/26C08J2433/24C08J2433/26C08F222/385
Inventor 吕斌王浩高党鸽
Owner SHAANXI UNIV OF SCI & TECH
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