Actualités

Cours de Sara Bonella "Simulation of activated events"

Jeudi 23 Mai 2013 10:00

Salle S4

Prix et distinctions

Prix Arconati-Visconti en Sciences, Chancellerie des universités de Paris

Dr. DIGUET Antoine

Professeurs invités

TURI Laszlo

Department of Physical Chemistry - Eötvös Lorànd University - Budapest - Hungary

POLIMENO Antonino

Gruppo di Chimica Teorica-Dipartimento di Scienze Chimiche-Universita' degli Studi di Padova-Italia

MUIR Tom

Princeton University - Princeton NJ - USA

Dernière publication

Adsorption induced transitions in soft porous crystals: An osmotic potential approach to multistability and intermediate structures

Bousquet, David, Coudert François-Xavier, Fossati Alexandre G. J., Neimark Alexander V., Fuchs Alain H., and Boutin Anne

The Journal of Chemical Physics, Volume 138, p. 174706, 2013

Soutenance à venir

HDR

Analyse MicroÉlectrochimique Couplée à des Techniques Optiques ou à des Microsystèmes pour l’Etude de Processus Biologiques Fondamentaux de Sécrétion

Mme GUILLE COLLIGNON Manon

Jeudi 6 Juin 2013 10:00

E012 (ENS, département de Chimie)

Miniemulsion polymerization templates: A systematic comparison between low energy emulsification (Near-PIT) and ultrasound emulsification methods

Titre	Miniemulsion polymerization templates: A systematic comparison between low energy emulsification (Near-PIT) and ultrasound emulsification methods
Type de publication	Journal Article
Nouvelles publications	2011
Auteurs	Galindo-Alvarez, J, Boyd D, Marchal P, Tribet C, Perrin P, Marie-Begue E, Durand A, Sadtler V
Journal	Colloids and Surfaces a-Physicochemical and Engineering Aspects
Volume	374
Pagination	134-141
Résumé	Poly(ethylene oxide)-covered polystyrene nanoparticles were prepared by free radical miniemulsion polymerization after using an original low energy emulsification procedure called Near-PIT method. This procedure consisted in heating the initial monomer emulsion up to a temperature close to the phase inversion temperature (PIT) but lower. The surfactants used were commercial Brij (R) 78 and Brij (R) 700 and mixtures of both. The Near-PIT method was showed to allow the preparation of nanoparticle suspensions with average diameters lower than 100 nm and solid contents higher than 20 wt% while avoiding heating the initial monomer emulsion above PIT like in usual low energy methods. The influences of various formulation and operating parameters were investigated. Finally, the Near-PIT method was compared to other well-known procedures for nanoparticle preparation, miniemulsion polymerization after ultrasound emulsification and macroemulsion polymerization under mechanical agitation. The performances of Near-PIT procedure were comparable to ultrasound emulsification. (C) 2010 Elsevier B.V. All rights reserved.