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Volume 5, Issue 5 Res. Rev. J Mat. Sci. 2017
ISSN: 2321-6212 Advanced Materials 2017
September 07-08, 2017
September 07-08, 2017 | Edinburgh, Scotland
Advanced materials & Processing
11th International Conference on
Key role of the liquid-surface interactions to reveal hidden elastic properties in liquids
Laurence Noirez
Paris-Saclay Université, France
At the liquid-solid interface, the energy of the liquid is different from the bulk due to the imbalance between the attraction forces
betweenmolecules (cohesion) and the interactions of the molecules to the surface (wetting). In case of ceramic composites, liquid
molecules are so strongly attracted to the high energy surface that the surface procures a total wetting. Because the viscosity measures
the energy necessary to transfer a motion from a surface to the liquid, the force of the interactions to the substrate plays a key role in
the determination of the fluid properties. By improving the liquid/surface boundary forces, high energy surfaces optimize the motion
transfer during the rheological measurement. Low frequency shear elasticity becomes measurable bringing robust evidence that
liquid molecules are not dynamically free but elastically correlated. The elastic property is experimentally identified on polymer melts,
glass formers, Van der Waals liquids or liquid water pointing out a generic property. It sheds a new light on the mechanisms that
govern liquid transport, gelation or glass processes or active materials and allows the identification of new effects as the conversion
of a liquid phase in a strain-driven optical harmonic oscillator or the production of cold under flow that become possible when the
liquid molecules are strongly anchored on high energy substrates.
Biography
Dr. Laurence Noirez is CNRS Research Director at the Laboratoire Léon Brillouin (LLB), Université Paris-Saclay (France). She is working in a large facility that
welcomes around 500 experimentalists per year; Dr. Noirez has a 25 years expertise in neutron scattering, diffraction and instrumentation. Her main developments
concern a multiscale structural and dynamic study of simple and complex fluids (microfluidics) taking into account in particular the liquid/surface boundary conditions.
Dr. L. Noirez established that liquids are long range elastically correlated and measured their low frequency shear elasticity. She also evidenced the impact of the
interfacial forces on the liquid flow showing in particular that liquids can produce cold. She has published over SCI 130 articles.
Laurence Noirez, Res. Rev. J Mat. Sci. 2017, 5:5
DOI: 10.4172/2321-6212-C1-005
a) By improving liquid/substrate boundaries, glycerol
reveals a solid-like response at the mesoscopic scale
(measured at room temperature, 40µm thickness).
b) New effects as the conversion of a liquid phase in an
opto-mechanical oscillator are revealed and visualize the
elastic response (thickness 200µm).