High-strength and high-toughness hyperbranched polymer hydrogel and preparation method thereof

[0022] N-acryloyl glycinamide (NAGA) is dissolved in dimethyl sulfoxide according to the solid content of 10%, and then the initiator benzophenone (BP) is added to the above solution, and the consumption of the initiator is N-propylene 0.0% of the mass of acylglycinamide (NAGA), use inert gas (such as nitrogen, argon or helium) to remove oxygen in the reaction system, the mold is irradiated in a UV curing box for 60 minutes to ensure sufficient initiation of free radical polymerization, followed by Open the mold and take out the gel, soak it in deionized water for 36 hours to reach a swelling equilibrium, and replace the deionized water every 12 hours to obtain a high-strength and high-tough hyperbranched polymer hydrogel (HB-PNAGA).

[0024] N-acryloyl glycinamide (NAGA) is dissolved in tetrahydrofuran according to the solid content of 40%, and then the initiator benzophenone (BP) is added to the above solution, and the consumption of the initiator is N-acryloyl glycinamide. (NAGA) 3% of the mass, use inert gas (such as nitrogen, argon or helium) to remove oxygen in the reaction system, the mold is irradiated in a UV curing box for 20 minutes to ensure sufficient initiation of free radical polymerization, and then open the mold to take out the condensation The gel was soaked in deionized water for 72 hours to reach a swelling equilibrium, and the deionized water was replaced every 12 hours to obtain a high-strength and high-tough hyperbranched polymer hydrogel (HB-PNAGA).

[0026] N-acryloyl glycinamide (NAGA) was dissolved in N,N-dimethylformamide according to the solid content of 20%, and then the initiator benzophenone (BP) was added to the above solution, and the amount of the initiator was It is 1% of the mass of N-acryloyl glycinamide (NAGA), using inert gas (such as nitrogen, argon or helium) to remove oxygen in the reaction system, and the mold is irradiated in a UV curing box for 40 minutes to ensure sufficient initiation freedom Then, the mold was opened to take out the gel, soaked in deionized water for 48 hours to reach the swelling equilibrium, and the deionized water was replaced every 12 hours to obtain a high-strength and high-tough hyperbranched polymer hydrogel (HB-PNAGA).

[0027] from image 3 It can be seen that the characteristic hydrogen peaks of a, b, c, d, e, and f all exist, and the characteristic peaks (c+f) in the high-strength and high-tough hyperbranched polymer hydrogel (HB-PNAGA): e=1 :1, description-NH 2 Scale redu