Laboratoire de Physique des Solides - UMR 8502

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Anniina Salonen

ANNIINA SALONEN


CONTACT INFORMATION


Maître de Conférence (HDR)/Assistant Professor

Laboratoire de Physique des Solides

Université Paris Sud

Bat 510 - RDC Ouest - Bureau 070

91 405 Orsay Cedex

Mail: salonen(at)lps.u-psud.fr

List of publications:

2020

2019

2018

2017

2016

2015

2014


  • H. Caps, G. Delon, N. Vandewalle, R. M. Guillermic, O. Pitois, A. L. Biance, L. Saulnier, P. Yazhgur, E. Rio, A. Salonen, and D. Langevin, “Does water foam in microgravity?”, Europhysics News, vol. 45, no. 3, p. 22–25, 2014.
  • H. Caps, N. Vandewalle, A. Saint-jalmes, L. Saulnier, P. Yazhgur, E. Rio, A. Salonen, and D. Langevin, “How foams unstable on earth behave in mocrogravity?”, Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 457, p. 392–396, 2014.


  • A. - L. Fameau and A. Salonen, “Effect of particles and aggregated structures on the foam stability and aging”, Comptes Rendus Physique, vol. 15, no. 8-9, p. 748-760, 2014.

  • A. Maestro, E. Rio, W. Drenckhan, D. Langevin, and A. Salonen, “Foams stabilised by mixtures of nanoparticles and oppositely charged surfactants: relationship between bubble shrinkage and foam coarsening.”, Soft matter, vol. 10, p. 6975–6983, 2014.
    Abstract: We have studied foams stabilised by surfactant-decorated nanoparticles adsorbed at the bubble surfaces. We show that the controlled compression of a single bubble allows one to understand the coarsening behavior of these foams. When bubbles are compressed, the particles become tightly packed in the surface layer. They lose their mobility, and the interface becomes solid-like when the jammed state is reached. Further compression leads to interfacial buckling characterised by crumpled surfaces. We find that the surface concentration of particles at which the jamming and the buckling transitions occur are independent of the surfactant concentration. This is a surprising feature. It suggests that the surfactants are mandatory to help the particles adsorb at the interface and that they change the equilibrium surface concentration of the decorated particles. But they do not affect the surface properties once the particles are adsorbed. We measured the compression elastic modulus of the surface in the jammed state and found it to be compatible with the Gibbs condition for which the spontaneous dissolution of bubbles is arrested. Due to this effect, the coarsening process of a foam composed of many close-packed bubbles occurs in two steps. In the first step, coarsening is slow and coalescence of the bigger bubbles is observed. In the second step, a number of very small bubbles remains, which exhibit crumpled surfaces and are stable over long times. This suggests that foam coarsening is arrested once the smallest bubbles become fully covered after the initial shrinking step.


  • E. Rio, W. Drenckhan, A. Salonen, and D. Langevin, “Unusually stable liquid foams”, Advances in Colloid and Interface Science, vol. 205, p. 74-86, 2014.


  • A. Salonen, W. Drenckhan, and E. Rio, “Interfacial dynamics in foams and emulsions”, Soft Matter, vol. 10, p. 6870–6872, 2014.

2013

2012

2011



  • Y. Desfougères, A. Saint-Jalmes, A. Salonen, V. Vié, S. Beaufils, S. Pezennec, B. Desbat, V. Lechevalier, and F. Nau, “Strong Improvement of Interfacial Properties Can Result from Slight Structural Modifications of Proteins: The Case of Native and Dry-Heated Lysozyme”, Langmuir, vol. 27, no. 24, p. 14947-14957, Dec. 2011.

  • A. Salonen, R. Lhermerout, E. Rio, D. Langevin, and A. Saint-Jalmes, “Dual gas and oil dispersions in water: production and stability of foamulsion”, Soft Matter, 2011.
    Abstract: In this study we have investigated mixtures of oil droplets and gas bubbles and show that the oil can have two very different roles, either suppressing foaming or stabilising the foam. We have foamed emulsions made from two different oils (rapeseed and dodecane). For both oils the requirement for the creation of foamulsions is the presence of surfactant above a certain critical threshold, independent of the concentration of oil present. Although the foamability is comparable, the stability of the foamed emulsions is very different for the two oils studied. Varying a few simple parameters gives access to a wide range of behaviours, indeed three different stability regimes are observed: a regime with rapid collapse (within a few minutes), a regime where the oil has no impact, and a regime of high stability. This last regime occurs at high oil fraction in the emulsion, and the strong slowing down of ageing processes is due to the confinement of packed oil droplets between bubbles. We thus show that a simple system consisting of surfactant, water, oil and gas is very versatile and can be controlled by choosing the appropriate physical chemical parameters.
    Attachment Version soumise 714.9 kb (source)
    Attachment Version soumise 714.9 kb (source)

2010

2009

2007

2005

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