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US 12,037,439 B2Granted
Water-based polymer hydrogel system
AssigneeImam Abdulrahman Bin Faisal University
InventorsAyhan Bozkurt, Seyda T. Gunday Anil, Ismail Anil
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Abstract
Cross-linked polyvinyl polymers comprising charged groups and methods of making are disclosed. The polymers are effective and durable adsorbent of dyes from aqueous solutions. Also, a method of removal of dyes from contaminated water is disclosed.
Claims6
A water-based polymer hydrogel composition, comprising:
- a crosslinked polyvinyl polymer, and deionized water;
- wherein the crosslinked polyvinyl polymer consists essentially of:
- polymerized units of a vinylphosphonic acid crosslinked with units bis[2-(methylacryloyloxy)ethyl] phosphate (BMEP),
- wherein the crosslinked polyvinyl polymer is obtained through polymerization of the vinylphosphonic acid and the bis[2-(methyacryloyloxy)ethyl] phosphate (BMEP) in the presence of 0.1-3.0 mole % of azobis(2-methylpropionamidine dihydrochloride) in the deionized water at 70° C., wherein mole % is based on the total molar amount of the BMEP and the vinylphosphonic acid,
- wherein the BMEP is present in the crosslinked polyvinyl polymer in an amount of about 40 mol. % based on the total molar amount of the vinylphosphonic acid and the BMEP,
- wherein the vinylphosphonic acid has chemical formula I:
- wherein R1 is phosphonate;
- and R2, R3, and R4 are independently hydrogen, or carboxylate substituted with methyl, ethyl, or propyl, and
- wherein the crosslinked polyvinyl polymer has peaks at 910-990 cm−1 in the infrared spectrum.
6 more elements
Dependencies are inferred from the claim text.