期刊
POLYMER CHEMISTRY
卷 11, 期 45, 页码 7185-7198出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0py01036g
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资金
- CONICET from Argentina
- ANPCyT from Argentina
- SECyT (Universidad Nacional de Cordoba) from Argentina
- Universidad Nacional del Litoral from Argentina
- Universidad Tecnologica Nacional from Argentina
Polyphenols-based supramolecular hydrogels have recently attracted much attention as smart materials for applications in several technologies. Although great advances have been made in this field, there is a challenging need for creating new versatile materials that combine synthesis simplicity and suitable functional properties. In this work, inspired by the hydrogen bonding ability of pyrogallol-bearing proteins found in ascidians, we explored a small gallol analog, gallic acid (GA), as a dynamic crosslinker of poly(vinyl alcohol) (PVA). The fundamentals of the supramolecular assembly mechanism of PVA/GA hydrogels are studied for understanding the final properties of the obtained thermo-reversible hydrogels. The polymer deacetylation degree was a key factor to control the gelation kinetics, morphology, and properties of the supramolecular materials. Furthermore, the intercalation of GA molecules between PVA chains produced polymer crystals with a new spatial arrangement, modifying the elastic modulus of the supramolecular network and increasing its stability in water. With remarkable fast gelation ability, ascidian-inspired PVA-GA hydrogels may provide a promising platform for a wide range of biomedical applications including topical drug delivery of therapeutic proteins, wearable electronic devices, and 3D printing.
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