Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Scattering investigation of multiscale organization in aqueous solutions of native xanthan
Δημιουργός/Συγγραφέας:	[EL] Παπαγιαννόπουλος, Αριστείδης[EN] Papagiannopoulos, Aristeidis Sotiropoulos K. Radulescu A.
Εκδότης:	Elsevier Ltd
Ημερομηνία:	2016
Γλώσσα:	Αγγλικά
ISSN:	0144-8617
DOI:	10.1016/j.carbpol.2016.07.104
Περίληψη:	The hierarchical morphology of xanthan solutions is analyzed by light and neutron scattering in a broad range of concentrations in order to connect their morphology to their well-documented dynamic properties. Static light scattering inside the semidilute regime is dominated by the form factor of individual xanthan chains while at higher concentrations chain interconnections appear to modify the low wave vector scattering. Dynamic light scattering reveals the self-similar nature of the solutions caused by interchain associations as intensity autocorrelation functions present power-law behaviour. Small angle neutron scattering is dominated by the fractal scattering from the formed network at intermediate length scales. At small length scales the rigid structure of xanthan is revealed and the molecular weight per unit length is extracted. No detectable morphological alterations for shear rates up to 1000 rad/s are observed revealing that the shear thinning behaviour of xanthan is related to the disruption of chain-chain associations.
Τίτλος πηγής δημοσίευσης:	Carbohydrate Polymers
Τόμος/Κεφάλαιο:	153
Σελίδες:	196-202
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	Fractal Helix Light scattering Polysaccharide Small angle neutron scattering Xanthan
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2016 Elsevier Ltd
Σημειώσεις:	Small angle neutron scattering experiments have been supported by the European Commission under the 7th Framework Programme through the ‘Research Infrastructures' action of the ‘Capacities' Programme, NMI3-II Grant number 283883 .
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο