title: Capillary tube wetting induced by particles: towards armoured bubbles tailoring.
abstract: In this paper, we report on the strongly modified dynamics of a liquid finger pushed inside a capillary tube, when partially wettable particles are lying on the walls. Particles promote the appearance of new regimes and enable the tailored synthesis of bubbles encapsulated in a monolayer of particles (so-called "armoured bubbles"). This remarkable behavior arises due to the collection of particles at the air-liquid interface, which modify the global energy balance and stabilize the interface. Armoured-bubbles are of primary interest in industrial processes since they display increased stability, interfacial rigidity and can even sustain non-spherical shapes. This work opens perspective for a low cost bubbles-on-demand technology enabling the synthesis of armoured bubbles with specific sizes, shapes and composition.
authors.affiliation: International Laboratory LEMAC/LICS, IEMN, UMR CNRS 8520, Université Lille 1, Avenue Poincaré, 59652 Villeneuve d'Ascq, France. michael.baudoin@univ-lille1.fr farzam.zoueshtagh@univ-lille1.fr.
authors.forename: Farzam
authors.initials: F
authors.lastname: Zoueshtiagh
authors.forename: Michael
authors.initials: M
authors.lastname: Baudoin
authors.forename: David
authors.initials: D
authors.lastname: Guerrin