Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Water distributions in polystyrene-block-poly[styrene-g-poly(ethylene oxide)] block grafted copolymer system in aqueous solutions revealed by contrast variation small angle neutron scattering study
Δημιουργός/Συγγραφέας:	Li, Xin Hong, Kunlun Liu, Yun Shew, Chwen-Yang Liu, Emily Herwig, Kenneth W. Smith, Gregory S. Zhao, Junpeng Zhang, Guangzhao [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Chen, Wei-Ren
Εκδότης:	American Institute of Physics
Τόπος έκδοσης:	MELVILLE
Ημερομηνία:	2010-10-14
Γλώσσα:	Αγγλικά
ISSN:	0021-9606
DOI:	10.1063/1.3493331
Περίληψη:	We develop an experimental approach to analyze the water distribution around a core-shell micelle formed by polystyrene-block-poly[styrene-g-poly(ethylene oxide (PEO)] block copolymers in aqueous media at a fixed polymeric concentration of 10 mg/ml through contrast variation small angle neutron scattering (SANS) study. Through varying the D(2)O/H(2)O ratio, the scattering contributions from the water molecules and the micellar constituent components can be determined. Based on the commonly used core-shell model, a theoretical coherent scattering cross section incorporating the effect of water penetration is developed and used to analyze the SANS I(Q). We have successfully quantified the intramicellar water distribution and found that the overall micellar hydration level increases with the increase in the molecular weight of hydrophilic PEO side chains. Our work presents a practical experimental means for evaluating the intramacromolecular solvent distributions of general soft matter systems.
Τίτλος πηγής δημοσίευσης:	Journal of Chemical Physics
Τόμος/Κεφάλαιο:	133
Τεύχος:	14
Σελίδες:	[8]
Θεματική Κατηγορία:	[EL] Φυσική[EN] Physics
Λέξεις-Κλειδιά:	Physics, Atomic, Molecular & Chemical
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2010 American Institute of Physics. [doi:10.1063/1.343331]
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://jcp.aip.org/jcp/staff.jsp
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο