Friction coefficient between a hydrophobic soft solid surface and a fluid: Determined by QCM-D

[Display omitted] Quartz crystal microbalance with dissipation (QCM-D) response data was used to determine the friction coefficient (μ) between soft solid surface and ethanol. A self-assembly of Dodecanethiol (DCT) film on gold was carried out. The number of DCT grafted (Γ) onto gold surface was inv...

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Bibliographic Details
Published in:Chemical physics 2018-09, Vol.513, p.41-49
Main Authors: Patiño-Herrera, Rosalba, Catarino-Centeno, R., Goicochea, Armando Gama, Robles-Martínez, Marissa, Martínez, Ramiro Rico, Pérez, Elías
Format: Article
Language:English
Subjects:
Friction coefficient
Highly concentrated solutions
Hydrophobic film
Lubricant
QCM-D
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Summary:[Display omitted] Quartz crystal microbalance with dissipation (QCM-D) response data was used to determine the friction coefficient (μ) between soft solid surface and ethanol. A self-assembly of Dodecanethiol (DCT) film on gold was carried out. The number of DCT grafted (Γ) onto gold surface was investigated at concentrated solutions (10–33% v/v). Such large concentration leads to an increase on grafting density, viscosity, roughness and water contact angle favoring the reduction of friction coefficient (∼0.0922). These results allow proposing a soft self-assembled hydrophobic film to reduce friction between fluids into conduit, tube, or some other device.
ISSN:0301-0104
DOI:10.1016/j.chemphys.2018.06.023