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Article

Sorting Liquid Droplets by Surface Tension Using Devices with Quasi-Superamphiphobic Coatings

1
Henan Institute of Science and Technology, Xinxiang 453000, China
2
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(4), 820; https://doi.org/10.3390/polym12040820
Received: 12 March 2020 / Revised: 28 March 2020 / Accepted: 30 March 2020 / Published: 4 April 2020
(This article belongs to the Special Issue Polymeric Materials for Filtration and Purification)
Any solid surface with homogenous or varying surface energy can spontaneously show variable wettability to liquid droplets with different or identical surface tensions. Here, we studied a glass slide sprayed with a quasi-superamphiphobic coating consisting of a hexane suspension of perfluorosilane-coated nanoparticles. Four areas on the glass slide with a total length of 7.5 cm were precisely tuned via ultraviolet (UV) irradiation, and droplets with surface tensions of 72.1–33.9 mN m−1 were categorized at a tilting angle of 3°. Then, we fabricated a U-shaped device sprayed with the same coating and used it to sort the droplets more finely by rolling them in the guide groove of the device to measure their total rolling time and distance. We found a correlation between ethanol content/surface tension and rolling time/distance, so we used the same device to estimate the alcoholic strength of Chinese liquors and to predict the surface tension of ethanol aqueous solutions. View Full-Text
Keywords: surface energy; quasi-superamphiphobic surface; Chinese liquors surface energy; quasi-superamphiphobic surface; Chinese liquors
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MDPI and ACS Style

Zhang, Y.-P.; Fan, D.; Bai, X.-Z.; Cui, C.-X.; Chen, J.; Li, R.-L.; Liu, P.-F.; Qu, L.-B. Sorting Liquid Droplets by Surface Tension Using Devices with Quasi-Superamphiphobic Coatings. Polymers 2020, 12, 820. https://doi.org/10.3390/polym12040820

AMA Style

Zhang Y-P, Fan D, Bai X-Z, Cui C-X, Chen J, Li R-L, Liu P-F, Qu L-B. Sorting Liquid Droplets by Surface Tension Using Devices with Quasi-Superamphiphobic Coatings. Polymers. 2020; 12(4):820. https://doi.org/10.3390/polym12040820

Chicago/Turabian Style

Zhang, Yu-Ping, Di Fan, Xiu-Zhi Bai, Cheng-Xing Cui, Jun Chen, Ren-Long Li, Peng-Fei Liu, and Ling-Bo Qu. 2020. "Sorting Liquid Droplets by Surface Tension Using Devices with Quasi-Superamphiphobic Coatings" Polymers 12, no. 4: 820. https://doi.org/10.3390/polym12040820

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