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Spreading of Oil Droplets Containing Surfactants and Pesticides on Water Surface Based on the Marangoni Effect

Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China
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Academic Editor: Łukasz Chrzanowski
Molecules 2021, 26(5), 1408; https://doi.org/10.3390/molecules26051408
Received: 25 February 2021 / Revised: 2 March 2021 / Accepted: 3 March 2021 / Published: 5 March 2021
(This article belongs to the Section Applied Chemistry)
Oil droplets containing surfactants and pesticides are expected to spread on a water surface, under the Marangoni effect, depending on the surfactant. Pesticides are transported into water through this phenomenon. A high-speed video camera was used to measure the movement of Marangoni ridges. Gas chromatography with an electron capture detector was used to analyze the concentration of the pesticide in water at different times. Oil droplets containing the surfactant and pesticide spread quickly on the water surface by Marangoni flow, forming an oil film and promoting emulsification of the oil–water interface, which enabled even transport of the pesticide into water, where it was then absorbed by weeds. Surfactants can decrease the surface tension of the water subphase after deposition, thereby enhancing the Marangoni effect in pesticide-containing oil droplets. The time and labor required for applying pesticides in rice fields can be greatly reduced by using the Marangoni effect to transport pesticides to the target. View Full-Text
Keywords: Marangoni effect; spreading; pesticide transport; surfactants Marangoni effect; spreading; pesticide transport; surfactants
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MDPI and ACS Style

Liu, J.; Guo, X.; Xu, Y.; Wu, X. Spreading of Oil Droplets Containing Surfactants and Pesticides on Water Surface Based on the Marangoni Effect. Molecules 2021, 26, 1408. https://doi.org/10.3390/molecules26051408

AMA Style

Liu J, Guo X, Xu Y, Wu X. Spreading of Oil Droplets Containing Surfactants and Pesticides on Water Surface Based on the Marangoni Effect. Molecules. 2021; 26(5):1408. https://doi.org/10.3390/molecules26051408

Chicago/Turabian Style

Liu, Jiangyu; Guo, Xinyu; Xu, Yong; Wu, Xuemin. 2021. "Spreading of Oil Droplets Containing Surfactants and Pesticides on Water Surface Based on the Marangoni Effect" Molecules 26, no. 5: 1408. https://doi.org/10.3390/molecules26051408

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