Microgel reinforced dual-network hydrogel and preparation method thereof

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...

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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

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