Method for preparing polyglutamic acid hydrogel
A technology of polyglutamic acid and hydrogel, which is applied in the field of preparation of biodegradable polymer water-absorbing agents, can solve the problems of low cross-linking degree, long reaction time, and complicated components, and achieve high water absorption rate and short preparation time. Short, fast swelling effect
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Embodiment 1
[0009] Embodiment 1: polyglutamic acid 1.0975g, add water 5ml, ethylene glycol diglycidyl ether 0.530ml, adjust the initial pH of reaction system to be 4.6, constant temperature reaction under 60 ℃, along with the carrying out of reaction, pH increases gradually, every The pH of the reaction system was adjusted to 4.6 every 2 hours, and a hydrogel was formed after 7 hours of reaction. The prepared hydrogel was taken out, fully swollen and dialyzed, and then freeze-dried. Dissolve in deionized water for 5 minutes to reach swelling equilibrium, and the water absorption rate reaches 2200g / g.
Embodiment 2
[0010] Embodiment 2: polyglutamic acid 1.5790g, add water 5ml, ethylene glycol diglycidyl ether 0.762ml, adjust the initial pH of reaction system to be 4, constant temperature reaction under 50 ℃, along with the carrying out of reaction, pH increases gradually, every The pH of the reaction system was adjusted to 4 for 1 hour, and a hydrogel was formed after 8 hours of reaction. The prepared hydrogel was taken out, fully swollen and dialyzed, and then vacuum-dried to obtain a hydrogel with a water absorption rate of 1600 g / g.
Embodiment 3
[0011] Embodiment 3: polyglutamic acid 1.0975g, add water 5ml, ethylene glycol diglycidyl ether 0.530ml, adjust the initial pH of reaction system to be 4.6, constant temperature reaction under 60 ℃, along with the carrying out of reaction, pH increases gradually, every The pH of the reaction system was adjusted to 4.6 for 1 hour, and a hydrogel was formed after 6 hours of reaction. The prepared hydrogel was taken out, fully swollen and dialyzed, and then freeze-dried to obtain a hydrogel with a water absorption rate of 2000 g / g.
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