TY - JOUR
T1 - Evaporation of droplets on strongly and weakly pinning surfaces and dynamics of the triple line
AU - Bormashenko, Edward
AU - Musin, Albina
AU - Zinigrad, Michael
PY - 2011/7/20
Y1 - 2011/7/20
N2 - Evaporation of water droplets deposited on metal and polymer substrates was studied. The evaporated droplet demonstrates different behavior on weakly pinning (polymer) and strongly pinning (metallic) surfaces. When deposited on polymer surfaces, the evaporated droplet is featured by stick-slip sliding, whereas on strong-pinning metallic surfaces it does not show such kind of motion and demonstrates the giant contact-angle hysteresis. Stick-slip motion of droplets is described satisfactorily by the Shanahan-Sefiane model relating this kind of motion to surmounting potential barriers caused by the pinning of the triple (three-phase) line. The experimentally established "stick" times coincide with the values predicted by the Shanahan-Sefiane theory. The values of potential barriers are reported. The notion of the equilibrium contact angle is refined.
AB - Evaporation of water droplets deposited on metal and polymer substrates was studied. The evaporated droplet demonstrates different behavior on weakly pinning (polymer) and strongly pinning (metallic) surfaces. When deposited on polymer surfaces, the evaporated droplet is featured by stick-slip sliding, whereas on strong-pinning metallic surfaces it does not show such kind of motion and demonstrates the giant contact-angle hysteresis. Stick-slip motion of droplets is described satisfactorily by the Shanahan-Sefiane model relating this kind of motion to surmounting potential barriers caused by the pinning of the triple (three-phase) line. The experimentally established "stick" times coincide with the values predicted by the Shanahan-Sefiane theory. The values of potential barriers are reported. The notion of the equilibrium contact angle is refined.
KW - Equilibrium contact angle
KW - Evaporation of droplets
KW - Potential barrier
KW - Solid substrate
KW - Stick-slip motion
KW - Triple line
UR - http://www.scopus.com/inward/record.url?scp=79960648107&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2011.06.016
DO - 10.1016/j.colsurfa.2011.06.016
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AN - SCOPUS:79960648107
SN - 0927-7757
VL - 385
SP - 235
EP - 240
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -