Abstract
Choline chloride (ChCl) was used as the hydrogen bond acceptor (HBA) and acrylic acid (AA) and acrylamide (AM) as the hydrogen bond donor (HBD), and the three materials were mixed in a certain molar ratio to obtain deep eutectic solvent (DES). Subsequently, P(IA-co-AA-co-AM) composite hydrogels were prepared by adding itaconic acid (IA) to DES using the frontal polymerization (FP) method. The hydrogels were characterized by Fourier infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), and the influence patterns of IA content on the mechanical properties, swelling properties, and pH responsiveness of the composite hydrogels were investigated. The results showed that the composite hydrogel exhibited a homogeneous porous structure. The elongation at the break of the composite hydrogel gradually increased with the increase of IA content, and the elongation of the FP4 sample reached 167%. The addition of IA increased the number of hydrophilic groups, resulting in a 2.14-fold increase in the equilibrium swelling of the composite hydrogel in distilled water. P(IA-co-AA-co-AM) composite hydrogels exhibit different swelling patterns in acidic and alkaline environments, making them promising for acid–base indicators, biosensors, and other applications. In this study, a simpler and greener method was proposed to prepare P(IA-co-AA-co-AM) composite hydrogels with pH responsiveness.
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Funding
The work is supported by the 2022 Knowledge Innovation Dawn Special Plan Project (2022010801020393), the Marine Defense Technology Innovation Center Innovation Fund (JJ-2020–719-01), the Natural Science Foundation of Hubei Province (2021CFB292), and the Research and Innovation Initiatives of WHPU (2022J04). This work was finished at Wuhan Polytechnic University, Wuhan.
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Li, B., Hao, W., Xu, X. et al. Preparation and properties of P(IA-co-AA-co-AM) composite hydrogel via frontal polymerization. Colloid Polym Sci 301, 445–453 (2023). https://doi.org/10.1007/s00396-023-05079-0
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DOI: https://doi.org/10.1007/s00396-023-05079-0