Investigation of the dependence of inferred interfacial tension on rotation rate in a spinning drop tensiometer

Chan, C.C.V.; Elliott, Janet A.W.; Williams, Michael C.

doi:10.1016/s0021-9797(02)00194-7

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…Ding et al also measured gelatin/dextran mixtures and observed a difference in interfacial tension with different shear rates. Chan et al observed a similar effect for spinning drop measurements on silicone oil/water and water/air systems. For increasing rotation speeds they found an increase in the interfacial tension for both systems.…”

Section: Introductionmentioning

confidence: 61%

Effect of Permeability on Aqueous Biopolymer Interfaces in Spinning Drop Experiments

2006

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In this paper we show that interfaces in aqueous phase-separated biopolymer mixtures are permeable for all components present in the system. In spinning drop experiments, droplets of the low-density phase decreased up to 90% in volume over a time span of days to weeks, when inserted in a matrix of the high-density phase. We propose an expression for this change of volume in time in terms of diffusion coefficients of the components. From the magnitude of these coefficients, we conclude that the transfer of gelatin from inside the droplet to the outer phase was the rate-determining step in this process. Since the interfaces are permeable to all components, the properties of the system change in time. Therefore, the spinning drop technique is not an accurate method for the measurement of the equilibrium interfacial tension of these aqueous phase-separated systems.

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Section: Introductionmentioning

confidence: 61%

Effect of Permeability on Aqueous Biopolymer Interfaces in Spinning Drop Experiments

2006

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“…In Figure A, the variation of IFT with the rotation rate of the SDT at 60 °C is demonstrated. IFT increases with the increase of rotational speed until the condition L/D ≥ 4 is met (L/D is the length to diameter ratio of the drop). At 1000 rpm at 50 °C, the IFT of the 0.1% XG + 0.1% SDS + 0.01% TiO 2 nanofluid dropped to 0.00771 mN/m (Figure S1).…”

Section: Resultsmentioning

confidence: 99%

TiO₂/Sodium Dodecyl Sulfate/Xanthan Gum Nanofluid: A Promising Candidate for Enhanced Oil Recovery

Paine,

Mukherjee,

Bera

2024

Energy Fuels

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In this study, a TiO 2 /sodium dodecyl sulfate (SDS)/xanthan gum (XG) nanofluid is prepared to investigate its effectiveness in additional oil recovery. TiO 2 nanoparticles were synthesized via the sol−gel method and subsequently calcined at 350 °C. The crystalline nature and microstructural features of the synthesized TiO 2 were characterized using X-ray diffraction, Fourier transform infrared, and scanning electron microscopy. The TiO 2 /SDS/XG nanofluid was prepared using a probe sonicator until a clear dispersion of the mixture was achieved. The particle size of the nanofluid was determined through a dynamic light scattering analyzer, revealing a size of approximately 12−18 nm. The prepared nanofluid altered the wettability toward water-wet and reduced the interfacial tension between crude oil and the nanofluid to 0.00771 mN/m, along with surface tension values dropping to 33.2 mN/m. Such changes led to a reduction in capillary force, which in turn facilitated enhanced oil recovery (EOR). An imbibition study was also conducted using collected sandstone cores to measure excess oil recovery in the presence of the prepared nanofluid at a temperature of 50 °C and atmospheric pressure. The imbibition study showed that the nanofluid comprising 0.1% XG, 0.1% SDS, and 0.01% TiO 2 recovered 28% of the original oil in place, which is 33.33% higher than the formulation with 0.1% XG and 0.1% SDS and 100% higher than the 0.1% XG alone. Hence, the proposed formulation shows promise as a potential candidate for chemical EOR methods.

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“…However, their work is restricted to a contact angle of zero and did not cover the ranges of system parameters for which a portion of the interface is flattened. Importantly this restriction means that the capillary rise method could not be used to measure low surface tension values—more expensive specialized equipment such as the spinning drop tensiometer is typically used, which introduces its own difficulties 39 .…”

Section: Resultsmentioning

confidence: 99%

Gibbsian Thermodynamic Study of Capillary Meniscus Depth

Eslami

Elliott

2019

Sci Rep

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In the presence of gravity or other external fields, liquid surface curvature deviates from a spherical shape and the surface configuration can be found by numerical integration of the Young–Laplace equation and the typical initial point for integration is the apex of the interface. The meniscus shape in large Bond number systems, which have the central portion of the interface flattened, cannot be determined with the apex as the initial point for integration. Here we find the depth of capillary menisci by considering an initial point for integration to be at the three-phase-contact-line (TPCL) and evaluate the curvature at the TPCL by free energy analysis and inspect the effect of different parameters on the interface shape. A new parameter—which is the deviation of equilibrium curvature at the TPCL from the spherical shape (SR)—is introduced and inspected and it was found that at a Bond number of 13 the maximum deviation, approximately 0.8 of spherical curvature, takes place while for large enough Bond numbers the curvature at the three-phase contact line is near the spherical shape (0.95 < SR < 1). A potential application of this approach is to measure the capillary rise at the TPCL to find the surface tension in high Bond number systems such as those with low surface/interfacial tensions.

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Investigation of the dependence of inferred interfacial tension on rotation rate in a spinning drop tensiometer

Cited by 8 publications

References 16 publications

Effect of Permeability on Aqueous Biopolymer Interfaces in Spinning Drop Experiments

Effect of Permeability on Aqueous Biopolymer Interfaces in Spinning Drop Experiments

TiO₂/Sodium Dodecyl Sulfate/Xanthan Gum Nanofluid: A Promising Candidate for Enhanced Oil Recovery

Gibbsian Thermodynamic Study of Capillary Meniscus Depth

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Investigation of the dependence of inferred interfacial tension on rotation rate in a spinning drop tensiometer

Cited by 8 publications

References 16 publications

Effect of Permeability on Aqueous Biopolymer Interfaces in Spinning Drop Experiments

Effect of Permeability on Aqueous Biopolymer Interfaces in Spinning Drop Experiments

TiO2/Sodium Dodecyl Sulfate/Xanthan Gum Nanofluid: A Promising Candidate for Enhanced Oil Recovery

Gibbsian Thermodynamic Study of Capillary Meniscus Depth

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Product

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TiO₂/Sodium Dodecyl Sulfate/Xanthan Gum Nanofluid: A Promising Candidate for Enhanced Oil Recovery