An introduction to interface forces Lecturers: Christophe Henry

An introduction to interface forces
Lecturers: Christophe Henry (Universite Pierrre Marie Curie, Paris)
and Jean-Pierre Minier (Electricite de France, R & D, Chatou)
The purpose of the present workshop is to introduce the field of surface forces, both
at the fundamental and applied levels. Interface forces are increasingly studied both
theoretically and experimentally in various domains, particularly those involving
small-scale phenomena (such as in nano-sciences or colloidal particles). During the
workshops, student will have a unique opportunity to discuss and exchange views on
the issue of surface force. Some exercises (paper and computer) will be proposed to
better present and illustrate the subject matter. A background in chemical
engineering or physical chemistry will be helpful, although not necessary, for inspiring
and fruitful discussions.
After a brief introduction of the major concepts in intermolecular and surface forces,
the DLVO theory (named after the pioneering work of Derjaguin and Landau, Verwey
and Overbeek), which is traditionally used to describe the interaction between two
surfaces, will be presented. For that purpose, van der Waals forces will be first
highlighted from a theoretical and an experimental point of view, followed by a
presentation of the forces acting between two interacting electrostatic double-layers
(that form naturally when charged surfaces are immersed into an electrolyte
solution).
The DLVO theory will then be addressed. The validation of the DLVO theory together
with simple applications for colloidal particles will be presented. The limitations of the
DLVO theory will then be emphasised as well as some perspectives/theories
proposed to remove such limitations, with a special emphasis on recent
developments showing the need to account for surface heterogeneities (surface
roughness or electrostatic heterogeneities).
Projekt „Rozwój interdyscyplinarnych studiów doktoranckich na Politechnice Gdańskiej w zakresie nowoczesnych technologii”
jest współfinansowany przez Unię Europejską w ramach Europejskiego Funduszu Społecznego.
Finally, an application of surface forces will be presented: the deposition and
reentrainment of colloidal particles from surfaces will be addressed to specifically
highlight the coupling between hydrodynamic forces and surface forces (which act at
two different scales) and to illustrate the influence of small surface features
(roughness) on more macroscopic phenomena (here deposition and reentrainment).
TERMINY WARSZTATÓW
Data
Dzień tygodnia
Godzina
Sala
2012-12-03
Poniedziałek
9.15-11.45
115 IMP PAN
2012-12-05
Środa
8.30-10.00
115 IMP PAN
2012-12-07
Piątek
9.15-11.45
115 IMP PAN
Projekt „Rozwój interdyscyplinarnych studiów doktoranckich na Politechnice Gdańskiej w zakresie nowoczesnych technologii”
jest współfinansowany przez Unię Europejską w ramach Europejskiego Funduszu Społecznego.