Smartphone-Assisted Contact Angle Measurements: A Simple Approach to Determine the Critical Micelle Concentration of Surfactants
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Mudeha Shafat Khan [1] ; Adil Amin Wani [1] ; Qounsar Jan [1] ; Murtaza Manzoor Bhat [1] ; Mohammad Yaseen Kuchey [1] ; Ummar Ramzan Sheikh [1] ; Feroz Ahmad Sofi [1] ; Mohsin Ahmad Bhat [1]
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[1] University of Kashmir, India
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- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 101, Nº 3, 2024, págs. 1198-1203
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
We present a simple smartphone-based protocol for the estimation of the critical micelle concentration (CMC) of surfactants. The protocol is based on contact angle measurements from the smartphone-captured images of differently concentrated surfactant solution droplets mounted over a naturally existing or chemically synthesized superhydrophobic surface. A scatter plot of contact angle vs surfactant concentration is constructed for the determination of CMC. The described laboratory experiment, besides providing a simple, reliable, safe, cost-effective, and reproducible method for the estimation of CMC, will provide students with a fresh perspective on many fundamental and practical aspects of superhydrophobic surfaces, solid/liquid interfaces, and the self-aggregation of amphiphilic molecules.
