A5075470007- Surfactants and Colloidal Systems
- Advanced Polymer Synthesis and Characterization
- Block Copolymer Self-Assembly
- Pickering emulsions and particle stabilization
- Analytical Chemistry and Chromatography
- Polymer Surface Interaction Studies
- Molecular spectroscopy and chirality
- Mesoporous Materials and Catalysis
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2009-2013
CEA Paris-Saclay
2009-2013
Centre National de la Recherche Scientifique
2007-2013
Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux
2013
Laboratoire de Mesure du Carbone 14
2009
Institut Rayonnement-Matière de Saclay
2009
École Nationale Supérieure de Chimie de Lille
2008
Laboratoire de Chimie des Polymères Organiques
2007
Sorbonne Université
2007
The phase inversion of water-toluene emulsions stabilized with a single thermo- and pH-sensitive copolymer occurs through the formation multiple emulsions. At low pH ambient temperature, oil in water are formed which transform into highly stable at pHs immediately lower than border. higher pHs, emulsion turns one.
We describe how a versatile amphiphilic diblock copolymer can form oil-in-water (o/w) or water-in-oil (w/o) emulsions depending on pH and temperature. At high temperature, this is mostly hydrophobic forms w/o emulsions. Its spontaneous curvature greatly increased upon and/or temperature lowering (due to protonation hydration, respectively), which allows the formation of o/w Conductivity measurements confocal fluorescence micrographs evidence two kinds structures obtained over wide range also...
Single-phase microemulsions made of comparable amounts water and alkane cannot be stabilized unless a large proportion surfactant is used. Typically 10 to 30% nonionic surfactants such as n-alkylpolyglycol ethers are required form phases. Over the past 15 years, several authors have shown that this can significantly reduced by adding minute neutral diblock copolymers. However, though film elastic properties seem play role in so-called efficiency boosting effect, there no clear agreement...