Effect of Hydrophobically Modified SiO2 Nanoparticles on the Stability of Water-based SDS Foam

Published on Sep 1, 2020in Arabian Journal of Chemistry4.762
· DOI :10.1016/J.ARABJC.2020.06.037
Yan Wang4
Estimated H-index: 4
(China University of Petroleum),
Hongbing Wang6
Estimated H-index: 6
(China University of Petroleum)
+ 4 AuthorsSongqing Hu15
Estimated H-index: 15
(China University of Petroleum)
Abstract In the present study, SiO2 nanoparticles were first hydrophobically modified and then added into anionic surfactant sodium dodecyl sulfate (SDS) stabilized water-based foam to improve the foam stability. The foam stability was experimentally evaluated by measuring surface tension, Zeta potential and half-life of the foam. The foam stabilizing mechanism was also studied from a micro perspective by molecular dynamics simulation through analyzing the equilibration configuration and MSD curve of both SDS surfactant and water molecules. The results show that foam exhibits an optimal stability when SiO2 concentration is 0.35 wt.% under a specific surfactant concentration (0.5 wt.%) in this work. The addition of SiO2 nanoparticles with suitable concentration could improve the adsorption between SDS molecules and nanoparticles, thus limiting the movement of SDS and restricting the movement of surrounding water molecules, which is beneficial to enhance the foam stability.
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