US 11,951,472 B2
Systems and methods for undermedia repellency
Chao Li, Madison, WI (US); Jiaquan Yu, Madison, WI (US); Theodorus Evan de Groot, Madison, WI (US); and David James Beebe, Monona, WI (US)
Assigned to Wisconsin Alumni Research Foundation, Madison, WI (US)
Appl. No. 16/623,194
Filed by Wisconsin Alumni Research Foundation, Madison, WI (US)
PCT Filed Jun. 15, 2018, PCT No. PCT/US2018/037815
§ 371(c)(1), (2) Date Dec. 16, 2019,
PCT Pub. No. WO2018/232279, PCT Pub. Date Dec. 20, 2018.
Claims priority of provisional application 62/520,533, filed on Jun. 15, 2017.
Prior Publication US 2021/0138451 A1, May 13, 2021
Int. Cl. B01L 3/00 (2006.01); B05D 1/00 (2006.01); B05D 5/08 (2006.01)
CPC B01L 3/502 (2013.01) [B05D 1/60 (2013.01); B05D 5/08 (2013.01); B01L 2300/166 (2013.01)] 11 Claims
OG exemplary drawing
 
2. A method of making a droplet of a first liquid exhibiting perfect liquid repellency in a second volume of a second liquid covering a first solid surface, comprising:
a) introducing a first volume of a first liquid into a second volume of a second liquid above a first location on a first solid surface,
the first liquid and the second liquid having a known first liquid-second liquid interfacial tension,
the first liquid and the first location on the first solid surface having a known first liquid-first location interfacial tension,
the second liquid and the first location on the first solid surface having a known second liquid-first location interfacial tension,
wherein the first liquid-first location interfacial tension is greater than or equal to the sum of the first liquid-second liquid interfacial tension and the second liquid-first location interfacial tension, thereby giving rise to perfect liquid repellency between the first liquid and the first location on the first solid surface; and
moving the first volume of the first liquid from the first location on the first solid surface to a third location on the first solid surface,
the third location positioned at a second pre-determined and direction relative to the first location,
the first liquid and the third location on the first solid surface having a known first liquid-second location interfacial tension,
the second liquid and the third location on the first solid surface having a known second liquid-third location interfacial tension,
wherein the first liquid-third location interfacial tension is less than the sum of the first liquid-second liquid interfacial tension and the second liquid-third location interfacial tension, thereby initiating finite liquid repellency between the first volume of the first liquid and the third location on the first solid surface.