Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2009-04-07
The Journal of Physical Chemistry B 113, 12 (2009) 3769-3775
Physics
Condensed Matter
Soft Condensed Matter
Scientific paper
10.1021/jp807698s
In order to characterize very weak adhesive surfaces, we have developed a quantitative test inspired by the Johnson, Kendall, and Roberts adhesion test for soft adhesives, which relies on the formation and then the rupture of a capillary bridge between the surface to be tested and a liquid bath. Both the shape and the kinetics of breakage of the capillary bridge for various coatings put into contact with liquids of various viscosities and surface tensions have been studied. Several pull off regimes can be distinguished. For low pull off velocities, a quasi-static regime is observed, well described by capillary equations and sensitive to the hysteresis of the contact angle of the fluid on the coating. Above a critical pull off velocity that depends on the fluid viscosity, a dynamic regime is observed, characterized by the formation of a flat pancake of fluid on the coating that recedes more slowly than the capillary bridge itself. After the breakage of the capillary bridge, a small drop can remain attached to the surface. The volume of this drop depends on the dynamical regime and is strongly affected by very small differences between the coatings. The aptitude of this test in characterizing very weakly adhesive surfaces is exemplified by a comparison between three different perfluorinated coatings.
Leger Liliane
Restagno Frederic
Vagharchakian Laurianne
No associations
LandOfFree
Capillary Bridge Formation and Breakage: A Test to Characterize Antiadhesive Surfaces does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Capillary Bridge Formation and Breakage: A Test to Characterize Antiadhesive Surfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capillary Bridge Formation and Breakage: A Test to Characterize Antiadhesive Surfaces will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-314546