HARICH, R.; DEBLAIS, A; COLIN, A; KELLAY, H.

doi:10.1209/0295-5075/114/58006

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

http://creativecommons.org/licenses/by-sa/

HARICH, R.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

DEBLAIS, A
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

COLIN, A
Sciences et Ingénierie de la Matière Molle [SIMM]

Langue

Article de revue

Ce document a été publié dans

EPL - Europhysics Letters. 2016-06, vol. 114, n° 5, p. 58006 (1-6)

European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing

Résumé en anglais

Droplet pinch-off, which occurs when a drop of liquid detaches from a capillary, can be strongly modified in the presence of complex fluids such as polymer solutions and suspensions giving rise to long and slender filaments that thin slowly in time. While for polymers, the molecular conformations of the molecules in the filament are responsible for such a behavior, in suspensions the mechanisms at play remain to be deciphered. Here we show, experimentally, that while liquid bridges of non-Brownian suspensions of moderate concentrations have a thinning behavior very close to that of the solvent, the addition of short-chain polymers inducing depletion attractions between the particles in the suspension changes the thinning dynamics and gives rise to exponential thinning in time. The characteristic time of this dynamics increases with polymer concentration and therefore the intensity of the depletion forces at play. The tunability of this dynamics may be important for injket and 3D printing applications where short rupture times are sought for or in other situations where drop formation has to be minimized or inhibited.< Réduire

Mots clés en anglais

Emulsions and suspensions

Polymer solutions

Extensional flow and combined shear and extension

DOI

http://dx.doi.org/10.1209/0295-5075/114/58006

Project ANR

Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798