High-strength copolymer modified silk fibroin water absorbing material and preparation method thereof
A technology of copolymer modification and silk fibroin, which is applied in the field of silk fibroin composite water-absorbing materials, can solve the problems of reducing the practicability of silk fibroin water-absorbing materials, poor water absorption of silk fibroin, and unsatisfactory water absorption of silk fibroin, etc., to achieve Enhance chemical stability, improve stretch elasticity, promote absorption and storage effects
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[0024] Poly(vinyl alcohol-N-vinyl formamide), the preparation method comprises the following steps: (1) Add 600-1500mL of anhydrous ethylene glycol to the reaction bottle, then weigh 40-44 parts of vinyl alcohol and 46-55 parts Stir N-vinylformamide evenly, then add 3-5 parts of azobisisobutyronitrile as a polymerization initiator and 2-5 parts of dodecyl mercaptan as a chain transfer agent, and transfer the solution into a high-temperature hydrothermal reactor place in an oven and heat to 120-130°C, react for 4-4 hours, cool the material to room temperature after the reaction, filter ethylene glycol to obtain white flocs, and wash the flocs with appropriate amount of distilled water and absolute ethanol in turn , and then placed in an oven and heated to 60-65 ° C to fully dry to obtain a small molecular weight copolymer poly(vinyl alcohol-N-vinyl formamide).
[0025] A high-strength copolymer modified silk fibroin water-absorbing material, the preparation method comprising th...
Embodiment 1
[0029](1) Preparation of poly(vinyl alcohol-N-vinyl formamide): Add 600 mL of anhydrous ethylene glycol into the reaction bottle, then weigh 40 parts of vinyl alcohol and 55 parts of N-vinyl formamide and stir evenly, then add 3 parts of azobisisobutyronitrile as a polymerization initiator and 2 parts of dodecyl mercaptan as a chain transfer agent, transfer the solution into a high-temperature hydrothermal reaction kettle, and heat it in an oven to 120°C for 4 hours. At the end of the reaction, cool the material to room temperature, filter ethylene glycol to obtain white flocs, wash the flocs with appropriate amount of distilled water and absolute ethanol in turn, then place them in an oven and heat them to 60°C to fully dry to obtain a small molecular weight copolymer poly( Vinyl alcohol-N-vinyl formamide) component 1.
[0030] (2) Preparation of poly(vinyl alcohol-N-vinyl formamide) grafted modified silk fibroin: add 300 mL of anhydrous ethylene glycol and 200 mL of absolute...
Embodiment 2
[0033] (1) Preparation of poly(vinyl alcohol-N-vinyl formamide): Add 1000 mL of anhydrous ethylene glycol into the reaction bottle, then weigh 41 parts of vinyl alcohol and 53 parts of N-vinyl formamide and stir evenly, then add 3.5 parts of azobisisobutyronitrile as a polymerization initiator and 2.5 parts of dodecyl mercaptan as a chain transfer agent, the solution was transferred into a high-temperature hydrothermal reaction kettle, and heated to 120°C in an oven, and reacted for 6 hours. At the end of the reaction, cool the material to room temperature, filter ethylene glycol to obtain white flocs, wash the flocs with appropriate amount of distilled water and absolute ethanol in turn, then place them in an oven and heat them to 60°C to fully dry to obtain a small molecular weight copolymer poly( vinyl alcohol-N-vinyl formamide) component 2.
[0034] (2) Preparation of poly(vinyl alcohol-N-vinyl formamide) grafted modified silk fibroin: add 500 mL of anhydrous ethylene glyc...
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