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Polymeric nanoparticles stabilized by surfactants: kinetic studies

SYSNO ASEP	0361350
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Polymeric nanoparticles stabilized by surfactants: kinetic studies
Tvůrce(i)	Pánek, Jiří (UMCH-V)_{RID, ORCID} Filippov, Sergey K. (UMCH-V)_{RID, ORCID, SAI} Koňák, Čestmír (UMCH-V)_RID Steinhart, Miloš (UMCH-V)_RID Štěpánek, Petr (UMCH-V)_{RID, ORCID}
Zdroj.dok.	Journal of Dispersion Science and Technology - ISSN 0193-2691 Roč. 32, č. 8 (2011), s. 1105-1110
Poč.str.	6 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	nanoparticles ; solvent shifting ; time-resolved SAXS
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
CEP	GAP208/10/1600 GA ČR - Grantová agentura ČR
CEZ	AV0Z40500505 - UMCH-V (2005-2011)
UT WOS	000295219200005
DOI	10.1080/01932691.2010.497697
Anotace	A kinetic study was carried out to monitor the time-dependent formation of surfactant-stabilized polymeric nanoparticles prepared by controlled phase separation. The nanoparticles were made of poly(methylmethacrylate) or polystyrene and several ionic and nonionic surfactants. The dispersion was prepared by fast mixing a solution of the polymers in organic solvents with a solution of a surfactant in water. We observed the formation of well-defined nanoparticles measured by time-resolved small-angle x-ray scattering (TR-SAXS). Our results suggest that the kinetics for the formation of nanoparticles comprising ionic surfactants is much faster (in the range of milliseconds) than that for nanoparticles comprising nonionic surfactants (on the time scales of several seconds). We were able to observe the transformation of particle surface from transient structure to hard sphere one in real time. Some systems manifest a plethora of structural changes that demands further experimental research.
Pracoviště	Ústav makromolekulární chemie
Kontakt	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Rok sběru	2012

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