Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Effect of layer charge and charge distribution on the formation of chitosan - smectite bionanocomposites: Research paper
Δημιουργός/Συγγραφέας:	Koutsopoulou, Eleni Koutselas, Ioannis Christidis, George E. [EL] Παπαγιαννόπουλος, Αριστείδης[EN] Papagiannopoulos, Aristeidis Marantos, Ioannis
Εκδότης:	Elsevier
Ημερομηνία:	2020
Γλώσσα:	Αγγλικά
ISSN:	01691317
DOI:	10.1016/j.clay.2020.105583
Περίληψη:	Chitosan-clay bionanocomposites were prepared from chitosan biopolymer solutions and four different smectites (SAz-1 and SWy-2 montmorillonites, SBId-1 beidellite and NAu-1 nontronite), and the effect of layer charge and charge distribution on the formation of bionanocomposites was examined. The intercalation of the chitosan in the homoionic Na+-smectite samples showed that all samples produced chitosan-smectite nanocomposites even at the lowest chitosan-clay ratios. The adsorption isotherms of chitosan by the smectites were classified as L- type isotherms. The equilibrium data were fitted to Langmuir and Freundlich isotherms and the equilibrium adsorption was best described by the Langmuir isotherm model for SWy-2 and SBId-1 while the Freundlich model achieved a better description for SAz-1 and NAu-1 for the higher chitosan concentrations. The adsorption of chitosan exceeded the CEC in the montmorillonites (SWy-2 and SAz-1) whereas in SBId-1 and NAu-1 with tetrahedral charge it either reached or it was lower than the CEC showing that layer charge and charge localization may hinder chitosan adsorption.
Τίτλος πηγής δημοσίευσης:	Applied Clay Science
Τόμος/Κεφάλαιο:	190
Σελίδες:	105583
Θεματική Κατηγορία:	[EL] Βιοχημεία[EN] Biochemistry [EL] Χημική τεχνολογία[EN] Chemical technolgy
Λέξεις-Κλειδιά:	Smectite Layer charge Chitosan-clay bionanocomposite Montmorillonite Beidellite Nontronite
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © 2020 Elsevier B.V. All rights reserved.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://www.sciencedirect.com/science/article/abs/pii/S0169131720301484?via%3Dihub
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://www.sciencedirect.com/journal/applied-clay-science
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο