Contact Line Dynamics during the Evaporation of Extended
Colloidal Thin Films: Influence of Liquid Polarity and Particle Size
Udita
Uday Ghosh
Monojit Chakraborty
Soham De
Suman Chakraborty
Sunando DasGupta
10.1021/acs.langmuir.6b03267.s004
https://acs.figshare.com/articles/media/Contact_Line_Dynamics_during_the_Evaporation_of_Extended_Colloidal_Thin_Films_Influence_of_Liquid_Polarity_and_Particle_Size/4239560
Exercising control
over the evaporation of colloidal suspensions
is pivotal to modulate the coating characteristics for specific uses,
wherein the interactions among the liquid, the particles, and the
substrate control the process. In the present study, the contact line
dynamics of a receding colloidal liquid film consisting of particles
of distinctly different sizes (nominal diameters 0.055 and 1 μm
and surface unmodified) during evaporation is analyzed. The role of
the liquid polarity is also investigated by replacing the polar liquid
(water) with a relatively nonpolar liquid (isopropyl alcohol) in the
colloidal suspension. The characteristics of the evaporating receding
meniscus, namely, the film thickness and the curvature are experimentally
evaluated using an image-analyzing interferometry technique. The experimental
results are assessed in conjunction with the augmented Young–Laplace
equation, highlighting the roles of the relevant components of the
disjoining pressure and the polarity of the liquid involved in the
colloidal suspension.
2016-11-01 00:00:00
diameters 0.055
1 μ m
Contact Line Dynamics
coating characteristics
evaporation
polarity
Liquid Polarity
contact line dynamics
substrate control
role
suspension
image-analyzing interferometry technique
isopropyl alcohol
Extended Colloidal
film thickness
disjoining pressure
Particle Size Exercising control