Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Anion specificity effects on the interfacial aggregation behavior of poly(lauryl acrylate)-block-poly(N-isopropylacrylamide)
Δημιουργός/Συγγραφέας:	You K. Wen G. Skandalis A. [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Yang S.
Εκδότης:	American Chemical Society
Ημερομηνία:	2019
Γλώσσα:	Αγγλικά
ISSN:	0743-7463
DOI:	10.1021/acs.langmuir.9b01561
Άλλο:	PubMed ID: 31282165
Περίληψη:	Aggregation behavior of an amphiphilic diblock copolymer poly(lauryl acrylate)-block-poly(N-isopropylacrylamide) (PLA-b-PNIPAM) on neutral aqueous subphases with different salt species and salt concentrations, as well as the structures of its Langmuir-Blodgett (LB) films, were systematically studied. The presence of NaCl or Na2SO4 in subphases makes PNIPAM chains shrink on the water surface and reduce their solubility underwater. On the contrary, the presence of NaNO3 or NaSCN makes PNIPAM chains more stretched on water and increase their solubility underwater, whose stretch degree and solubility both increase with the increase of salt concentration. Solubility of PNIPAM chains in the above subphase solutions is ranked as NaSCN ≫ NaNO3 > pure H2O > NaCl ≈ Na2SO4, which is almost consistent with the Hofmeister series except for the latter two close cases. All the initial LB films of PLA-b-PNIPAM exhibit tiny isolated circular micelles. Upon compression, the LB films in the case of pure H2O exhibit the dense mixed structures of circular micelles and wormlike aggregates. The formation of wormlike aggregates is due to connection of some adjoining cores, which is less possible in other subphase cases because of the conformation difference of PNIPAM chains.
Τίτλος πηγής δημοσίευσης:	Langmuir
Τόμος/Κεφάλαιο:	35
Τεύχος:	30
Σελίδες:	9904-9911
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2019 American Chemical Society.
Σημειώσεις:	Natural Science Foundation of Heilongjiang Province: B2015023 This work was supported by the Natural Science Fund of Heilongjiang Province (no. B2015023).
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο