Measurement of Dynamic Surface Tension of Surfactant Solutions

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“…Besides, Masahiro [73] discussed the effects of the surface tension at the exit of the capillary tube.…”

Section: Potential Reasons For the Lower Viscosity Results Obtained W...mentioning

confidence: 99%

On-line, non-Newtonian capillary rheometry for continuous and in-line coatings production

Luo

Weinell

Okkels³

et al. 2021

J Coat Technol Res

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“…We next theoretically analyze the droplet formation. The force balance equation for a droplet at the end of capillary just before it falls yields the following equation for the dynamic surface tension γ d : (5), (6)…”

Section: Journal Of Fluid Science and Technologymentioning

confidence: 99%

“…In addition, we examined surfactant solutions with and without salt to investigate the effects of salt. As for the studies of droplet formation of surfactant solutions, experimental and numerical studies of pinch-off phenomena of both filament and droplet (4) , a fundamental study of the measurement of the dynamic surface tension utilizing the injection of liquid from a capillary (5), (6) have been carried out. However, the effects of both the dynamic surface tension and the concentration of salt on the diameter of a droplet injected from a capillary have not been investigated enough; The present experimental study treats these effects.…”

Section: Introductionmentioning

confidence: 99%

Effects of Dynamic Surface Tension on Droplet Formation of Surfactant Solution Injected from a Capillary Tube

Yamamoto

Kato

Yamashita

2010

JFST

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Effects of dynamic surface tension on the droplet formation of surfactant solutions were studied. Test fluids used were aqueous solutions of CTAB at several surfactant mol concentrations (C D) and CTAB/NaSal aqueous solutions at C D =1.0 mM and at three mol concentrations of NaSal. A droplet formed when a surfactant solution was injected into air from a capillary tube was investigated and the relation between the droplet diameter and the injection velocity V was measured. The size of droplet was evaluated by an equivalent droplet diameter D exp , which is the diameter of sphere whose volume is the same as that of a droplet injected. For the CTAB systems, D exp increased with increasing V at relatively low velocities because the dynamic surface tension also increased. However, the diameter decreased with increasing the velocity at relatively high velocities. This phenomenon can be qualitatively predicted from an equation of the force balance at a capillary exit when the effect of surface tension is evaluated using the dynamic surface tension. For the CTAB/NaSal systems, D exp increased with increasing V at relatively low velocities and reached a constant value. This phenomenon was also predicted qualitatively with the force balance equation.

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“…En la actualidad los surfactantes son empleados como agentes inhibidores en la formación de hidratos durante el transporte del gas natural (Chang et al, 2004). El estudio del comportamiento de los surfactantes ha cobrado vital importancia, razón por la cual se han desarrollado técnicas novedosas que son aplicadas para la medición de propiedades físicas de sistemas que involucran a los mismos (Gaudio et al, 2008;Karasawa et al, 2007), tales como la tensión interfacial, a través de la cual se pueden estudiar los procesos de adsorción (enriquecimiento de un componente en la interfase en comparación con el interior de la fase) que ocurren para este tipo de sistemas a nivel de la interfase generada. En estudios anteriores se han determinado la tensión interfacial de sistemas alcano-agua y obtenido correlaciones para el cálculo de la tensión en función de la temperatura y el número de átomo de carbono (Zeppieri et al, 2001).…”

Section: Estudio Experimental De La Tensión Interfacial Transitoria Punclassified

Estudio Experimental de la Tensión Interfacial Transitoria para Sistemas Alcanos-Agua-Triton X-100 empleando la Técnica de la Gota Emergente

Zeppieri¹,

Ramírez²,

Molina³

et al. 2009

Inf. tecnol.

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Resumen El objetivo de este trabajo fue estudiar el efecto de la concentración de un surfactante no iónico en agua sobre la tensión interfacial de una serie de alcanos. Para este propósito se seleccionaron el Triton X-100 y los alcanos: hexano, heptano, octano, decano, undecano y dodecano. Las pruebas se realizaron a una concentración 10-3 , 10-4 y 10-5 mol/L y se empleó el método de la gota emergente para el cálculo de la tensión interfacial. Se observó que la tensión interfacial de las soluciones de Triton X-100 en agua decrece a medida que la concentración de surfactante en solución aumenta. Se concluyó que el valor de la tensión interfacial es función de la concentración, del tiempo de exposición de la interfase con la disolución y del volumen inicial de la gota al momento de iniciar la medida.

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Measurement of Dynamic Surface Tension of Surfactant Solutions

Cited by 14 publications

References 20 publications

On-line, non-Newtonian capillary rheometry for continuous and in-line coatings production

On-line, non-Newtonian capillary rheometry for continuous and in-line coatings production

Effects of Dynamic Surface Tension on Droplet Formation of Surfactant Solution Injected from a Capillary Tube

Estudio Experimental de la Tensión Interfacial Transitoria para Sistemas Alcanos-Agua-Triton X-100 empleando la Técnica de la Gota Emergente

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