Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	A combined synchrotron powder diffraction and vibrational study of the thermal treatment of palygorskite-indigo to produce Maya blue
Δημιουργός/Συγγραφέας:	Sanchez del Rio, Manuel Boccaleri, Enrico Milanesio, Marco Croce, Gianluca van Beek, Wouter Tsiantos, Constantinos [EL] Χρυσικός, Γεώργιος Δ.[EN] Chryssikos, Georgios D. [EL] Γκιώνης, Βασίλης[EN] Gionis, Vassilis Kacandes, George H. Suarez, Mercedes Garcia-Romero, Emilia
Εκδότης:	Springer New York LLC
Τόπος έκδοσης:	NEW YORK
Ημερομηνία:	2009-10
Γλώσσα:	Αγγλικά
ISSN:	0022-2461
DOI:	10.1007/s10853-009-3772-5
Περίληψη:	The heating process (30-200 A degrees C) of a palygorskite-indigo mixture has been monitored in situ and simultaneously by synchrotron powder diffraction and Raman spectroscopy. During this process, the dye and the clay interact to form Maya blue (MB), a pigment highly resistant to degradation. It is shown that the formation of a very stable pigment occurs in the 70-130 A degrees C interval; i.e., when palygorskite starts to loose zeolitic water, and is accompanied by a reduction of the crystallographic a parameter, as well as by alterations in the C=C and C=O bonds of indigo. Mid- and near-infrared spectroscopic work and microporosity measurements, employed to study the rehydration process after the complex formation, provide evidence for the inhibition of the rehydration of MB as compared with palygorskite. These results are consistent with the blocking of the palygorskite tunnel entrance by indigo molecules with a possible partial penetration inside the tunnels. The surface silanols of palygorskite are not perturbed by indigo, suggesting that MB is not a surface complex.
Τίτλος πηγής δημοσίευσης:	Journal of Materials Science (incorporating Journal of Materials Science: Letters and Interface Science)
Τόμος/Κεφάλαιο:	44
Τεύχος:	20
Σελίδες:	5524-5536
Θεματική Κατηγορία:	[EL] Επιστήμη (Γενικά)[EN] Science (General) [EL] Τεχνολογία (Γενικά)[EN] Technology (General)
Λέξεις-Κλειδιά:	Materials Science, Multidisciplinary
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© SPRINGER
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0022-2461
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο