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DISFILM SIGNED

Fluorescent-based innovative measure in thin liquid films: A way to understand stability and energy dissipation in foams and emulsions

Total Cost €

EC-Contrib. €

Partnership

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Outcomes and
results

DISFILM project word cloud

Explore the words cloud of the DISFILM project. It provides you a very rough idea of what is the project "DISFILM" about.

stability fundamental technique quantities risk concentration flowing deformations industry 3d interface linear foam equilibrium velocity nobody hydrodynamical flows experimental green isolated emulsions fluorescent surfactant observations extended innovative measured physicist possibility modelled never techniques industrial extremely films formulations international designed data disfilm relies physics criteria predict knows too solved optical ruled fluid efficient leadership vicinity interfaces reproduce occurring laws liquid rupture conjecture regime dynamical bubble wait underlying statistical thin film surfactants suggest forming soap guideline stabilised few question becomes ruptures mechanics foams determined free phenomenological collapses fail exist obey modified seemingly breakthrough nevertheless

Project "DISFILM" data sheet

The following table provides information about the project.

Coordinator	UNIVERSITE DE RENNES I Organization address address: RUE DU THABOR 2 city: RENNES CEDEX postcode: 35065 website: www.univ-rennes1.fr contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.
Coordinator Country	France [FR]
Total cost	1˙415˙506 €
EC max contribution	1˙415˙506 € (100%)
Programme	1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
Code Call	ERC-2016-COG
Funding Scheme	ERC-COG
Starting year	2017
Duration (year-month-day)	from 2017-09-01 to 2022-08-31

Partnership

Take a look of project's partnership.

#	participants	country	role	EC contrib. [€]
1	UNIVERSITE DE RENNES I UNIVERSITE DE RENNES I Organization address address: RUE DU THABOR 2 city: RENNES CEDEX postcode: 35065 website: www.univ-rennes1.fr contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.	FR (RENNES CEDEX)	coordinator	1˙415˙506.00

Map

Project objective

Nobody knows why a soap bubble collapses. When the liquid film forming the bubble, stabilised by surfactants, becomes too thin, it collapses. This seemingly simple problem, ruled by the classical laws of fluid mechanics and of statistical physics, is still a challenge for the physicist. The rupture criteria based on a stability analysis in the vicinity of the film equilibrium state fail to reproduce the observations. However the film ruptures in a foam obey some simple phenomenological laws, which suggest that underlying fundamental laws exist and wait to be determined. The state-of-the-art conjecture is that ruptures are related to hydrodynamical processes in the films, a field in which I have now an international leadership. Recent experimental data I obtained open the possibility to address this question using a fully non-linear approach in the far from equilibrium regime. In this aim, DISFILM will develop an innovative technique to measure the interface velocity and surfactant concentration, based on the use of fluorescent surfactants. The risk relies in the adaptation to dynamical conditions of advanced optical techniques. These quantities have never been measured on flowing interfaces yet, and my technique will be an important breakthrough in the field of free interface flows in presence of surfactants. A set-up will be designed to reproduce on few thin films the deformations occurring in a foam sample. The dynamical path leading to the rupture of the film will be identified and modelled. The results obtained on an isolated film will be implemented to predict the 3D foam stability and the approach will be extended to emulsions. Foams and emulsions are widely used in industry and most of the stability issues have been solved. Nevertheless, most of the industrial formulations must currently be modified in order to use green surfactants. This adaptation will be extremely more efficient and possible with the results of DISFILM as a guideline.

Publications

List of publications.
year	authors and title	journal	last update
2020	Adrien BussonniÃ¨re, Evgenia Shabalina, Xavier Ah-Thon, MickaÃ«l Le Fur, Isabelle Cantat Dynamical Coupling between Connected Foam Films: Interface Transfer across the Menisci published pages: , ISSN: 0031-9007, DOI: 10.1103/PhysRevLett.124.018001	Physical Review Letters 124/1	2020-04-15
2019	Evgenia Shabalina, Antoine BÃ©rut, Mathilde Cavelier, Arnaud Saint-Jalmes, Isabelle Cantat Rayleigh-Taylor-like instability in a foam film published pages: , ISSN: 2469-990X, DOI: 10.1103/physrevfluids.4.124001	Physical Review Fluids 4/12	2020-04-15
2019	Antoine BÃ©rut, Isabelle Cantat Marangoni stress induced by rotation frustration in a liquid foam published pages: 1562-1570, ISSN: 1744-683X, DOI: 10.1039/c8sm01855c	Soft Matter 15/7	2019-06-06

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