Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Influences of Subphase Salt Conditions on the Interfacial Behavior of Triblock Copolymer PnBA-PNIPAM-PDMAEA
Δημιουργός/Συγγραφέας:	Liu, Dongxue Wen, Gangyao Skandalis, Athanasios [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios He, Guanying
Ημερομηνία:	2025-06-09
Γλώσσα:	Αγγλικά
ISSN:	0743-7463 1520-5827
DOI:	10.1021/acs.langmuir.5c00922
Άλλο:	40489892
Περίληψη:	The effects of subphase salt conditions on the interfacial behavior of a triblock copolymer, poly(n-butyl acrylate)-poly(N-isopropylacrylamide)-poly(2-(dimethylamino)ethyl acrylate) (PnBA-PNIPAM-PDMAEA), were studied by the Langmuir film balance technique and atomic force microscopy. Under acidic conditions, at the low ionic strength of NaCl solution (0.15 mol/L), the monolayer isotherm of the copolymer appears at large mean molecular areas (mmA) due to the destruction of the hydration of tertiary amine groups in the PDMAEA blocks. At its middle and high ionic strengths (0.30 and 0.60 mol/L), the isotherms are close to that without salt due to the interfacial shrinkage of the PDMAEA blocks resulting from their complete electrostatic shielding. With increasing the ionic strength of Na2SO4 solutions, the isotherms move to larger mmA values. Under alkaline conditions, the interfacial stretching degrees of the hydrophilic blocks increase with the concentrations of Na2SO4, NaSCN, and NaNO3 solutions (0.10-1.00 mol/L). Under different salt conditions, the Langmuir-Blodgett films of the copolymer exhibit separate circular micelles. Moreover, the so-called core-corona micelle structure can be a core-shell-corona structure in strict meaning, which is first proposed in amphiphilic block copolymer systems at interfaces.
Τίτλος πηγής δημοσίευσης:	Langmuir : the ACS journal of surfaces and colloids
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Αναλυτική χημεία[EN] Analytical chemistry [EL] Νανοτεχνολογία[EN] Nanotechnology
Λέξεις-Κλειδιά:	copolymers ionic strength isotherms micelles salts
Κάτοχος πνευματικών δικαιωμάτων:	© 2025 American Chemical Society
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1021/acs.langmuir.5c00922
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο