ORBi: Petrov Petar - Stabilized mixed micelles with a temperature-responsive core and a functional shell

Reference : Stabilized mixed micelles with a temperature-responsive core and a functional shell


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering Physical, chemical, mathematical & earth Sciences : Chemistry
	To cite this reference:	http://hdl.handle.net/2268/98143

Title :	Stabilized mixed micelles with a temperature-responsive core and a functional shell
Language :	English
Author, co-author :	Petrov, Petar [Institute of Polymers, Bulgarian Academy of Sciences, Sofia, Bulgaria > > > >]
	Tsvetanov, Christo B. [Institute of Polymers, Bulgarian Academy of Sciences, Sofia, Bulgaria > > > >]
	Jérôme, Robert [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Publication date :	28-May-2009
Journal title :	Journal of Physical Chemistry B
Publisher :	American Chemical Society
Volume :	113
Issue/season :	21
Pages :	7527-7533
Audience :	International
ISSN :	1520-6106
e-ISSN :	1520-5207
City :	Washington
Country :	DC
Keywords :	[en] self-assembly in solution ; micelle ; stimuli responsive micelle
Abstract :	[en] Formation and stabilization of multiresponsive micelles with a mixed poly(ethylene oxide)/polyelectrolyte shell and a temperature-responsive poly(propylene oxide) core were studied. Various poly(ethylene oxide)block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers were mixed with poly(acrylic acid)-block-poly(propylene oxide)-block-poly(acrylic acid) (PAA-PPO-PAA) or poly(dimethylaminoethyl methacrylate)-block-poly(propylene oxide)-block-poly(dimethylaminoethyl methacrylate) (PD-MAEMA-PPO-PDMAEMA) triblock copolymers. The micelles formed by binary mixtures of well-defined compositions at a specific pH were additionally stabilized by loading with pentaerythritol tetraacrylate (PETA), that was polymerized and cross-linked "in situ" with UV assistance. Depending on both the composition of the copolymers and the experimental conditions, either spherical or wormlike "stabilized polymeric micelles with a mixed shell" (SPMMS) were observed by dynamic light scattering (DLS) and transmission electron microscopy (TEM). The SPMMS that contained PAA blocks in the shell were pH-sensitive, such that a reversible transition from well-dispersed SPMMS to precipitate could be promoted. In contrast, the SPMMS with a PEO/PDMAEMA mixed shell remained well-dispersed in the 2-11 pH range. Finally, SPMMS were successfully exploited as templates for the preparation of Ag nanoparticles (Ag NPs).
Research units :	Center for Education and Research on Macromolecules (CERM)
Funders :	The Bulgarian Academy of Sciences ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; The "CGRI" ; The National Science Fund of Bulgaria
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/98143
DOI :	10.1021/jp901307d
Other URL :	http://pubs.acs.org/doi/pdf/10.1021/jp901307d

File(s) associated to this reference

Fulltext file(s):

	File	Commentary	Version	Size	Access
Restricted access	Jerome R 2009 J Phys Chem B 113, 7527.pdf		Publisher postprint	1.01 MB	Request copy

All documents in ORBi are protected by a user license.

Dspace v1.5