Preparation method of porous hydrogel
A technology of porous hydrogel and preparation steps, which is applied in the field of preparation of porous hydrogel, which can solve the problems of low porosity and low strength, and achieve the effect of increasing porosity, increasing strength and increasing proportion
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example 1
[0021] Put polyvinyl alcohol and water in a three-necked flask with a mass ratio of 1:50, stir with a glass rod for 20 minutes, let it stand for swelling for 5 hours, then place the three-necked flask in a magnetic stirrer with a digital speed measurement and constant temperature at a temperature of 85 ° C. Under the condition of rotating speed of 600r / min, heat and stir to dissolve for 60min, add gelatin with 0.8 times the mass of polyvinyl alcohol, and heat and stir to dissolve for 60min under the condition of temperature of 85°C and rotating speed of 600r / min, then add polyethylene into the three-necked flask Hydrochloric acid with 10 times the mass of alcohol and glutaraldehyde solution with 10 times the mass of polyvinyl alcohol were stirred and mixed for 12 hours at a temperature of 38°C and a rotational speed of 300r / min to obtain a mixed slurry, and then the mixed slurry was filtered to obtain a gel. Cut the gel into pieces, wash them with deionized water for 6 days, ch...
example 2
[0023]Put polyvinyl alcohol and water in a three-necked flask with a mass ratio of 1:50, stir with a glass rod for 20 minutes, let it stand for swelling for 5 hours, then place the three-necked flask in a magnetic stirrer with a digital speed measurement and constant temperature at a temperature of 85 ° C. Under the condition of rotating speed of 600r / min, heat and stir to dissolve for 60min, add gelatin with 0.8 times the mass of polyvinyl alcohol, and heat and stir to dissolve for 60min under the condition of temperature of 85°C and rotating speed of 600r / min, then add polyethylene into the three-necked flask Hydrochloric acid with 10 times the mass of alcohol and glutaraldehyde solution with 10 times the mass of polyvinyl alcohol were stirred and mixed for 12 hours at a temperature of 38°C and a rotational speed of 300r / min to obtain a mixed slurry, and then the mixed slurry was filtered to obtain a gel. Cut the gel into pieces, wash them with deionized water for 6 days, cha...
example 3
[0025] Put polyvinyl alcohol and water in a three-necked flask with a mass ratio of 1:50, stir with a glass rod for 20 minutes, let it stand for swelling for 5 hours, then place the three-necked flask in a magnetic stirrer with a digital speed measurement and constant temperature at a temperature of 85 ° C. Under the condition of rotating speed of 600r / min, heat and stir to dissolve for 60min, add gelatin with 0.8 times the mass of polyvinyl alcohol, and heat and stir to dissolve for 60min under the condition of temperature of 85°C and rotating speed of 600r / min, then add polyethylene into the three-necked flask Hydrochloric acid with 10 times the mass of alcohol and glutaraldehyde solution with 10 times the mass of polyvinyl alcohol were stirred and mixed for 12 hours at a temperature of 38°C and a rotational speed of 300r / min to obtain a mixed slurry, and then the mixed slurry was filtered to obtain a gel. Cut the gel into pieces, wash them with deionized water for 6 days, ch...
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