Underwater Spontaneous Pumpless Transportation of Nonpolar Organic Liquids on Extreme Wettability Patterns

ACS Applied Materials & Interfaces
Shuai HuangWenji Xu

Abstract

Spontaneous pumpless transportation (SPT) of liquids has generated tremendous demands in microfluidic systems and advanced devices. However, the transportation of nonpolar organic liquids on open platforms underwater remains a challenge because most existing SPT systems are only designed for use in air. Here, we report a surface-tension-driven SPT system to transport various nonpolar organic liquids using underwater extreme wettability patterns. The patterns were fabricated with a wedge-shaped superoleophilic track on a superoleophobic background by combining CuCl2 etching, stearic acid modification, and mask-based nitrogen cold plasma treatment. Three types of underwater SPT processes-horizontal transport, tilted transport, and directional transport-were studied experimentally and theoretically. For horizontal SPT and tilted SPT, the capillary force was the main driving force, which depended on the wedge angle of the superoleophilic track. The excellent transportation ability of horizontal SPT of underwater liquid droplets was obtained at a wedge angle of 3-5°. The maximum moving height of organic liquids on the tilted SPT transport was obtained at an angle of 8°. For directional SPT, organic liquids did not drop off in the mo...Continue Reading

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Citations

Feb 16, 2017·Lab on a Chip·Xiaolong YangDanyang Zhao
May 11, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Elham ShiraniMajid Ebrahimi Warkiani
Nov 11, 2020·Physical Chemistry Chemical Physics : PCCP·Yang ChenYao Lu
Apr 12, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Yanfen ZhengShouping Xu
Nov 10, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Xiaolong YangVictor Breedveld
Apr 10, 2018·ACS Applied Materials & Interfaces·Xiaolong YangDennis W Hess
Jan 12, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Xiaolong YangXin Liu
Jan 13, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Uddalok SenConstantine M Megaridis
Dec 28, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Lei WuYanlin Song

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