Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 468, Issue -, Pages 10-20Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2016.01.028
Keywords
Drop impact; Maximum deformation; Liquid marbles; Armored interface; High-speed imaging
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We present findings from an experimental study of the impact of liquid droplets onto powder surfaces, where the particulates are hydrophobic. We vary both the size of the drop and impact speed coupled with the size range of the powder in order to assess the critical conditions for the formation of liquid marbles, where the drop becomes completely encapsulated by the powder, and arrested shapes where the drop cannot regain its spherical shape. By using different hydrophobization agents we find that a lower particle mobility may aid in promoting liquid marble formation at lower impact kinetic energies. From observations of the arrested shape formations, we propose that simple surface tensions may be inadequate to describe deformation dynamics in liquid marbles. (C) 2016 Elsevier Inc. All rights reserved.
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