Bio-Nanocomposite Hydrogel Based on Zinc Alginate/Graphene Oxide: Morphology, Structural Conformation, Thermal Behavior/Degradation, and Dielectric Properties
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Otros documentos de la autoría: Sabater i Serra, Roser; Molina-Mateo, Jose; Torregrosa, Constantino; Andrio, Andreu; Meseguer-Dueñas, José M.; Serrano-Aroca, Ángel
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Título
Bio-Nanocomposite Hydrogel Based on Zinc Alginate/Graphene Oxide: Morphology, Structural Conformation, Thermal Behavior/Degradation, and Dielectric PropertiesAutoría
Fecha de publicación
2020Editor
MDPIISSN
2073-4360Cita bibliográfica
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, 702Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.mdpi.com/2073-4360/12/3/702Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
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.Derechos de acceso
info:eu-repo/semantics/openAccess
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