Mechanically Strong Superabsorbent Terpolymer Hydrogels Based on AMPS via Hydrogen-Bonding Interactions
نویسندگان
چکیده
Polymers 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 aqueous solutions. Owing the covalently cross-linked network structure PAMPS preventing dissipation crack energy, they exhibit poor mechanical properties. Herein, we demonstrate that terpolymerization AMPS, methacrylic (MAAc), N,N-dimethylacrylamide (DMAA) an solution under UV light without produces mechanically strong hydrogen-bonded durable The terpolymer formed at MAAc/DMAA molar ratio 4:1 high Young’s modulus (26 ± 2 MPa) toughness (31 5 MJ·m–3) able absorb 2035 255 times mass dissolving. content gel preparation, denoted by w, significantly affects microstructure hydrogels. Decreasing w gelation increases length primary chains forming three-dimensional (3D) hence number interchain H-bonds proximity effect. An optically transparent-to-opaque transition accompanied with strong-to-weak properties was detected increasing transformation uniform into colloidal composed phase-separated highly AMPS-poor aggregates interconnected AMPS-rich chains.
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ژورنال
عنوان ژورنال: ACS applied polymer materials
سال: 2023
ISSN: ['2637-6105']
DOI: https://doi.org/10.1021/acsapm.2c02085