Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Modification of the Co-assembly Behavior of Double-Hydrophilic Block Polyelectrolytes by Hydrophobic Terminal Groups: Ordered Nanostructures with Interpolyelectrolyte Complex Domains
Δημιουργός/Συγγραφέας:	Fanova, Anastasiia Davidovich, Irina Talmon, Yeshayahu Skandalis, Athanasios [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Štěpánek, Miroslav
Ημερομηνία:	2021
Γλώσσα:	Αγγλικά
ISSN:	2637-6105 2637-6105
DOI:	10.1021/acsapm.1c00033
Περίληψη:	We report here the influence of hydrophobic terminal groups from RAFT chain transfer agent 4-cyano-4-[(dodecylsulfanylthiocarbonyl) sulfanyl]pentanoic acid on the co-assembly behavior of two oppositely charged double-hydrophilic block polyelectrolytes (DHBPs), poly{[2-(methacryloyloxy)ethyl]trimethyl ammonium iodide}-b-poly(N-isopropyl acrylamide) (QPDMAEMA-PNIPAm), with the dodecyl group at the end of the PNIPAm block, and poly(acrylic acid)-b-poly(N-isopropyl acrylamide) (PAA-PNIPAm). The co-assembly process was investigated using dynamic light scattering (DLS), differential scanning calorimetry (DSC), time-resolved small-angle X-ray scattering (SAXS), and cryo-transmission electron microscopy (TEM). The terminal dodecyl group of QPDMAEMA-PNIPAm induced hydrophobic association of PNIPAm coronas of QPDMAEMA-PNIPAm/PAA-PNIPAm core–corona particles into micrometer-sized aggregates. In ca. 2 s after mixing the DHBPs, the aggregates formed an ordered structure with constant distances (∼30 nm) between interpolyelectrolyte complex cores of the core–corona particles. This paper thus shows that a modification of double-hydrophilic block polyelectrolytes by low-molecular-weight hydrophobic terminal groups is a simple route for preparation of nanostructured networks of physically cross-linked nanoparticles with potential application as containers for encapsulation and delivery of multivalent ions.
Τίτλος πηγής δημοσίευσης:	ACS Applied Polymer Materials
Τόμος/Κεφάλαιο:	3
Τεύχος:	4
Σελίδες:	1956–1963
Θεματική Κατηγορία:	[EL] Νανοτεχνολογία[EN] Nanotechnology [EL] Οργανική χημεία[EN] Organic chemistry
Λέξεις-Κλειδιά:	Micelles Hydrophilic block copolymers Electrostatic co-assembly Polyelectrolytes Small-angle X-ray scattering Cryogenic transmission electron microscopy
Κάτοχος πνευματικών δικαιωμάτων:	© 2021 American Chemical Society
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://pubs.acs.org/doi/pdf/10.1021/acsapm.1c00033
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο