Bio-Nanocomposite Hydrogel Based on Zinc Alginate/Graphene Oxide: Morphology, Structural Conformation, Thermal Behavior/Degradation, and Dielectric Properties
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Altres documents de l'autoria: Sabater i Serra, Roser; Molina-Mateo, Jose; Torregrosa, Constantino; Andrio, Andreu; Meseguer-Dueñas, José M.; Serrano-Aroca, Ángel
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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Títol
Bio-Nanocomposite Hydrogel Based on Zinc Alginate/Graphene Oxide: Morphology, Structural Conformation, Thermal Behavior/Degradation, and Dielectric PropertiesAutoria
Data de publicació
2020Editor
MDPIISSN
2073-4360Cita bibliogràfica
Sabater i Serra, R.; Molina-Mateo, J.; Torregrosa-Cabanilles, C.; Andrio-Balado, A.; Meseguer Dueñas, J.M.; Serrano-Aroca, Á. Bio-Nanocomposite Hydrogel Based on Zinc Alginate/Graphene Oxide: Morphology, Structural Conformation, Thermal Behavior/Degradation, and Dielectric Properties. Polymers 2020, 12, 702Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://www.mdpi.com/2073-4360/12/3/702Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Bio-nanocomposite hydrogels based on sodium alginate (SA) as polymer matrix and
graphene oxide (GO) nanosheets with zinc as crosslinking agent were synthesized with the aim of
incorporating the intrinsic properties ... [+]
Bio-nanocomposite hydrogels based on sodium alginate (SA) as polymer matrix and
graphene oxide (GO) nanosheets with zinc as crosslinking agent were synthesized with the aim of
incorporating the intrinsic properties of their constituents (bioactivity and antimicrobial activity).
Thus, stable and highly interconnected networks were obtained from GO nanosheets dispersed in
SA matrices through interactions with low amounts of zinc. The GO nanosheets were successfully
incorporated into the alginate matrix in the form of a complex nano-network involving different
interactions: Bonds between alginate chains induced by Zn ions (egg box structure), interactions
between GO nanosheets through Zn ions and hydrogen bonds between alginate chains, and GO
nanosheets. The molecular interactions and morphology were confirmed by Fourier-transform
infrared spectroscopy and transmission electron microscopy. The composite’s structural organization
showed enhanced thermal stability. The glass transition temperature shifted to a higher temperature
due to the reduced mobility induced by additional crosslinking bonds after incorporating the GO
nanosheets and Zn into the polymer matrix. Finally, the dielectric behavior revealed that charge carrier
mobility was hampered by the compact structure of the nanonetwork, which reduced conductivity.
The combined properties of these nanocomposite hydrogels make them attractive biomaterials in
the field of regenerative medicine and wound care since both surface bioactivity and antibacterial
behavior are two critical factors involved in the success of a biomaterial. [-]
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Polymers 2020, 12, 702.Drets d'accés
info:eu-repo/semantics/openAccess
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