Mechanically Strong Superabsorbent Terpolymer Hydrogels Based on AMPS via Hydrogen-Bonding Interactions

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dc.authoridSEKIZKARDES, BUSRA/0000-0002-7460-9834
dc.authoridSU, ESRA/0000-0001-6643-6788
dc.authoridOkay, Oguz/0000-0003-2717-4150
dc.contributor.authorSekizkardes, Busra
dc.contributor.authorSu, Esra
dc.contributor.authorOkay, Oguz
dc.date.accessioned2025-02-20T08:42:17Z
dc.date.available2025-02-20T08:42:17Z
dc.date.issued2023
dc.departmentTürk-Alman Üniversitesien_US
dc.description.abstractPolymers based on 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) attract significant attention due to their large water absorption capacity when swollen in water. Poly(AMPS) (PAMPS) hydrogels are usually synthesized via free-radical cross-linking copolymerization of AMPS and a chemical cross-linker in aqueous solutions. Owing to the covalently cross-linked network structure of PAMPS hydrogels preventing dissipation of the crack energy, they exhibit poor mechanical properties. Herein, we demonstrate that the terpolymerization of AMPS, methacrylic acid (MAAc), and N,N-dimethylacrylamide (DMAA) in an aqueous solution under UV light without a chemical cross-linker produces mechanically strong hydrogen-bonded hydrogels that are durable in water. The terpolymer hydrogels formed at a MAAc/DMAA molar ratio of 4:1 exhibit a high Young's modulus (26 +/- 2 MPa) and toughness (31 +/- 5 MJ center dot m-3) and are able to absorb 2035 +/- 255 times their mass in water without dissolving. The water content at the gel preparation, denoted by w, significantly affects the microstructure of terpolymer hydrogels. Decreasing the water content w at gelation increases the length of the primary chains forming the three-dimensional (3D) network and hence the number of interchain H-bonds due to the proximity effect. An optically transparent-to-opaque transition accompanied with a strong-to-weak transition in the mechanical properties was detected with increasing w due to the transformation of the uniform network into a colloidal network composed of phase-separated and highly hydrogen-bonded AMPS-poor aggregates interconnected by AMPS-rich terpolymer chains.
dc.identifier.doi10.1021/acsapm.2c02085
dc.identifier.issn2637-6105
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1021/acsapm.2c02085
dc.identifier.urihttps://hdl.handle.net/20.500.12846/1630
dc.identifier.wosWOS:000935899500001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherAmer Chemical Soc
dc.relation.ispartofAcs Applied Polymer Materials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250220
dc.subjectsuperabsorbent hydrogelsen_US
dc.subjectphysical hydrogelsen_US
dc.subjecthydrogen bondingen_US
dc.subjectmechanical propertiesen_US
dc.subjectviscoelasticityen_US
dc.titleMechanically Strong Superabsorbent Terpolymer Hydrogels Based on AMPS via Hydrogen-Bonding Interactions
dc.typeArticle

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