Electric response type interpenetrating polymer hydrogel and preparation method thereof
A technology of interpenetrating polymers and hydrogels, which is applied in the field of electric-driven smart hydrogels, can solve the problems of limited applications and poor mechanical properties of polymer hydrogels, and achieve low product costs, good application prospects, and high tensile strength. The effect of elongation
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[0021] The preparation method of the electroresponsive interpenetrating polymer hydrogel of the present invention comprises the following steps in sequence:
[0022] In the first step, polyethylene glycol, glycerol and polyisocyanate monomers are mixed uniformly and defoamed;
[0023] In the second step, the mixture melt obtained from the first step is poured into a mold, and then the temperature is raised for polymerization reaction to obtain a water-soluble polyurethane cross-linked network body;
[0024] In the third step, acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, N,N'-methylenebis(acrylamide) and potassium persulfate are added to water and mixed uniformly to prepare an aqueous solution of polymerized monomers;
[0025] The fourth step is to soak the water-soluble polyurethane cross-linked network body prepared in the second step in the aqueous polymerized monomer solution prepared in the third step until the swelling is balanced;
[0026] The fifth step is ...
Embodiment 1
[0032] 5 kg of polyethylene glycol 1000 (molecular weight 1000), 0.3 kg of glycerol and 2.08 kg of toluene diisocyanate were used to stir and mix evenly and fully defoam under reduced pressure. Then, the melted mixture obtained by mixing was poured into a mold, polymerized at 80°C for 1 hour, and then crosslinked and cured at 120°C for 2 hours to obtain a water-soluble polyurethane crosslinked network body. Add 1.242 kg of 2-acrylamido-2-methylpropanesulfonic acid, 0.432 kg of acrylic acid, 0.096 kg of N, N'-methylenebis(acrylamide) and 0.032 kg of potassium persulfate into 6 kg of deionized water, mix Uniformly dubbed polymerized monomer aqueous solution. Subsequently, the water-soluble polyurethane cross-linked network body is soaked in the prepared polymerized monomer aqueous solution until the swelling is balanced. Finally, the water-soluble polyurethane cross-linked network immersed in the aqueous solution of the polymerized monomer is heated to raise the temperature, an...
Embodiment 2
[0034]5 kg of polyethylene glycol 1000 (molecular weight 1000), 0.3 kg of glycerol and 3.0 kg of diphenylmethane diisocyanate were used to stir and mix evenly, and fully degassed under reduced pressure. Then, the melted mixture obtained by mixing was poured into a mold, polymerized at 80°C for 1 hour, and then crosslinked and cured at 120°C for 2 hours to obtain a water-soluble polyurethane crosslinked network body. Add 0.2 kg of 2-acrylamido-2-methylpropanesulfonic acid, 0.792 kg of acrylic acid, 0.096 kg of N, N'-methylenebis(acrylamide) and 0.032 kg of potassium persulfate into 6 kg of deionized water, mix Uniformly dubbed polymerized monomer aqueous solution. Subsequently, the water-soluble polyurethane cross-linked network body is soaked in the prepared polymerized monomer aqueous solution until the swelling is balanced. Finally, the water-soluble polyurethane cross-linked network soaked in the aqueous solution of the polymerized monomer is heated to raise the temperatur...
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Abstract
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