Investigation of Generation and Dynamics of Microbubbles in the Solutions of Anionic Surfactant (SDS)

The paper demonstrates the possibility of air microbubble formation in aqueous solutions of SDS anionic surfactant, with particular emphasis on the use of a microporous asymmetric wettability membrane, an air compressor, and a water pump. An experimental setup and specialized software in the Python...

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Bibliographic Details
Published in:Microgravity science and technology 2022-08, Vol.34 (4), Article 74
Main Authors: Lyubimova, T., Rybkin, K., Fattalov, O., Kuchinskiy, M., Kozlov, M.
Format: Article
Language:English
Subjects:
Aerospace Technology and Astronautics
Air compressors
Aqueous solutions
Bubbles
Classical and Continuum Physics
Diameters
Engineering
Histograms
Image analysis
Light scattering
Microparticles
Original Article
Photon correlation spectroscopy
Programming languages
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Surfactants
The effect of gravity on non-equilibrium processes in fluids
Wettability
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Summary:The paper demonstrates the possibility of air microbubble formation in aqueous solutions of SDS anionic surfactant, with particular emphasis on the use of a microporous asymmetric wettability membrane, an air compressor, and a water pump. An experimental setup and specialized software in the Python programming language have been developed. The results of experimental and numerical studies are presented in the form of histograms of the diameter distribution of bubbles. The method of static image analysis was used to measure the size of the generated bubbles. It is shown that as the concentration of SDS increases from 0 to 3.5 mmol, the average diameter of the bubbles decreases from 135 µm to 90 µm which is accompanied by a simultaneous increase of their concentration. A further increase in the SDS concentration above 3.5 mmol causes clouding of the solution due to a decrease in the diameter of the bubbles, which becomes less than 32 µm and the formation of an opalescent suspension of water-insoluble microparticles. An attempt has been made to estimate the size of bubbles and particles in such solutions using the Dynamic Light Scattering (DLS) technique.
ISSN:1875-0494
0938-0108
1875-0494
DOI:10.1007/s12217-022-09977-w