Patent ID: 11932717
Assignee: HANGZHOU NORMAL UNIVERSITY
Field: Environmental technology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A green synthesis method of an antibacterial super-porous hydrogel with rapid adsorption and separation of anionic dyes and heavy metal ions, wherein a pore size of the hydrogel is adjustable from 50 m to 200 m, and the method comprises the following steps of:
step (1): adding an imidazole ionic liquid and polyethylene glycol diacrylate into deionized water, and magnetically stirring the mixture for a certain time to obtain a uniform solution; and adding a photoinitiator lithium phenyl(2,4,6-trimethylbenzoyl)phosphinate into the solution, and magnetically stirring the mixture for a certain time in the dark until the mixture is completely dissolved, wherein a mass ratio of the imidazole ionic liquid to the deionized water is (0.25 to 0.6):1; and a mass ratio of the imidazole ionic liquid to the polyethylene glycol diacrylate is 1 to 100:0.1 to 10;
the imidazole ionic liquid is a vinyl imidazole salt ionic liquid, with a molecular structural formula as follows:, wherein X is one of Cl−, Br−, PF6−, BF4− and CH3COO−, and n=2 to 12;
step (2): pouring the solution obtained in the step (1) into a mold, and irradiating for a period of time under an ultraviolet lamp with a certain power to initiate polymerization to obtain a poly (ionic liquid)hydrogel; and
step (3): soaking the poly (ionic liquid)hydrogel obtained in the step (2) in the deionized water to dialyze for a certain time, and removing an unreacted poly (ionic liquid) monomer and a poly (ionic liquid) homopolymer in the hydrogel; and then freeze-drying the hydrogel at a certain temperature for a certain time to obtain the poly (ionic liquid) super-porous hydrogel.