Association of poly(4-hydroxystyrene)-block-poly(ethylene oxide) in aqueous solutions: block copolymer nanoparticles with intermixed blocks

0371349 - ÚMCH 2012 RIV US eng J - Článek v odborném periodiku
Štěpánek, M. - Hajduová, J. - Procházka, K. - Šlouf, Miroslav - Nebesářová, Jana - Mountrichas, G. - Mantzaridis, Ch. - Pispas, S.
Association of poly(4-hydroxystyrene)-block-poly(ethylene oxide) in aqueous solutions: block copolymer nanoparticles with intermixed blocks.
Langmuir. Roč. 28, č. 1 (2012), s. 307-313. ISSN 0743-7463
Grant CEP: GA ČR GAP208/10/0353; GA ČR GCP205/11/J043; GA AV ČR KAN200520704
Výzkumný záměr: CEZ:AV0Z40500505; CEZ:AV0Z60220518
Klíčová slova: nanoparticles * poly(4-hydroxystyrene)-block-poly(ethylene oxide) * PHOS-PEO
Kód oboru RIV: CD - Makromolekulární chemie
Impakt faktor: 4.187, rok: 2012

Association behavior of diblock copolymer poly(4-hydroxystyrene)-block-poly(ethylene oxide) (PHOS-PEO) in aqueous solutions and solutions in water/tetrahydrofuran mixtures was studied by static, dynamic, and electrophoretic light scattering, 1H NMR spectroscopy, transmission electron microscopy, and cryogenic field-emission scanning electron microscopy. It was found that, in alkaline aqueous solutions, PHOS-PEO can form compact spherical nanoparticles whose size depends on the preparation protocol. Instead of a core/shell structure with segregated blocks, the PHOS-PEO nanoparticles have intermixed PHOS and PEO blocks due to hydrogen bond interaction between −OH groups of PHOS and oxygen atoms of PEO and are stabilized electrostatically by a fraction of ionized PHOS units on the surface.
Trvalý link: http://hdl.handle.net/11104/0006821