Soft Matter Sciences and Engineering
Physico - Chemistry of Polymers and Dispersed Media

UMR7615


News

Prix de la meilleure présentation d’étudiant à la conférence ’complex liquid-liquid interfaces’

Rémi Deleurence, étudiant en thèse au laboratoire, a obtenu le prix de la meilleure présentation d’étudiant à la conférence internationale ’complex liquid-liquid interfaces’ à Ascona, Suisse du 13 au 18 Juillet 2014. La présentation de Rémi, intitulée ’foams made of complex fluids’ concernait les propriétés de mousses aqueuses formées avec des hydrogels de polymères ou des suspensions flocculées de colloides et de (...)

Making soft matter tough

Etienne Ducrot and Costantino Creton of the Laboratory of Soft Matter Science and Engineering of the ESPCI ParisTech in collaboration with Yulan Chen and Rint Sijbesma of the Institute for Complex Molecular Systems of TU Eindhoven and Markus Bulters from DSM Ahead, have published their latest results in the issue of Science of April 11th 2014. Their work demonstrates conclusively that ordinarily brittle elastomers can be toughened without using fillers, by using cleverly designed (...)

Des solutions de nanoparticules comme adhesif pour les gels et les tissus biologiques

En collaboration avec des chercheurs du laboratoire MMC, Séverine Rose, Paul Elzière, Dominique Hourdet et Alba Marcellan ont trouvé un moyen de faire adhérer des gels ou des tissus biologiques. Ces travaux ont fait l’objet d’une publication dans la revue "Nature" (en ligne le 11/12/2013).

Young Rheologist Award

Le ’Young Rheologist award’ de TA Instrument est décerné à Cécile Monteux, qui reçoit un rhéomètre interfacial pour cisailler et mesurer les propriétés visco-élastiques de couches d’amphiphiles adsorbées aux interfaces liquides.


Highlights

Glass transition accelerates the spreading of solvent droplets on soluble polymers!

Poor dissolution of powders by a liquid leading to lump formation is a common experience in everyday life and in industrial processes but its causes remain poorly understood. In collaboration with researchers from the Nestlé Research Center in Lausanne, researchers of the lab have just published new results of Julien Dupas’ thesis in Physical Review Letters. Those results shed light on the wetting of polymeric substrates by their solvent, which often consitute the limiting step of the (...)

Non–Amontons-Coulomb local friction law of randomly rough contact interfaces with rubber

In a paper to appear in EPL, we report on measurements of the local friction law at a multi-contact interface formed between a smooth rubber and statistically rough glass lenses, under steady-state friction. Using contact imaging, surface displacements are measured, and inverted to extract both distributions of frictional shear stress and contact pressure with a spatial resolution of about . For a glass surface whose topography is self-affine with a Gaussian height asperity distribution, (...)

Soft dynamics and intermittent quakes in soft glassy systems

T. Kajiya et al., to appear in Soft Matter
We have measured the dynamics of the thermal fluctuations of the free surface of oil in water emulsions. The oil droplets are colloidal and when their volume fraction is close to or larger than the disordered packing volume fraction, the emulsion ages. We have used an optical technique developed in the lab to measure the fluctuations of the free surface of the emulsion as it ages. We thus evidence abnormal fluctuations that consist in rare but (...)


Seminars

Comportement des colloîdes autour de leur transition vitreuse

Gregory B. McKenna Department of Chemical Engineering, Texas Tech University, Lubbock

Jeudi 19 juin - 14h00 - Amphi Urbain

La transition vitreuse des fluides complexes, surtout moléculaires, est comprise au moins sur le plan phénoménologique. En même temps, il y a (...)