On the calculation of solid-liquid interfacial tension in metallic systems from contact angle data

1983 ◽  
Vol 2 (5) ◽  
pp. 197-200 ◽  
Author(s):  
N. Eustathopoulos ◽  
A. Passerone
Keyword(s):  
Contact Angle ◽  
Interfacial Tension ◽  
Angle Data ◽  
Solid Liquid ◽  
Contact Angle Data ◽  
Metallic Systems

scholarly journals Mechanism of active silica nanofluids based on interface-regulated effect during spontaneous imbibition

2021 ◽  
Author(s):  
Xu-Guang Song ◽  
Ming-Wei Zhao ◽  
Cai-Li Dai ◽  
Xin-Ke Wang ◽  
Wen-Jiao Lv
Keyword(s):  
Contact Angle ◽  
Interfacial Tension ◽  
Oil Recovery ◽  
Dynamic Contact Angle ◽  
Liquid Interface ◽  
Spontaneous Imbibition ◽  
Wettability Alteration ◽  
Low Permeability ◽  
Oil Water ◽  
Solid Liquid

AbstractThe ultra-low permeability reservoir is regarded as an important energy source for oil and gas resource development and is attracting more and more attention. In this work, the active silica nanofluids were prepared by modified active silica nanoparticles and surfactant BSSB-12. The dispersion stability tests showed that the hydraulic radius of nanofluids was 58.59 nm and the zeta potential was − 48.39 mV. The active nanofluids can simultaneously regulate liquid–liquid interface and solid–liquid interface. The nanofluids can reduce the oil/water interfacial tension (IFT) from 23.5 to 6.7 mN/m, and the oil/water/solid contact angle was altered from 42° to 145°. The spontaneous imbibition tests showed that the oil recovery of 0.1 wt% active nanofluids was 20.5% and 8.5% higher than that of 3 wt% NaCl solution and 0.1 wt% BSSB-12 solution. Finally, the effects of nanofluids on dynamic contact angle, dynamic interfacial tension and moduli were studied from the adsorption behavior of nanofluids at solid–liquid and liquid–liquid interface. The oil detaching and transporting are completed by synergistic effect of wettability alteration and interfacial tension reduction. The findings of this study can help in better understanding of active nanofluids for EOR in ultra-low permeability reservoirs.

Combining degradation and contact angle data in assessing the photocatalytic TiO2 :N surface

2010 ◽  
Vol 42 (6-7) ◽  
pp. 947-954 ◽  
Author(s):  
Alina Manole ◽  
V. Dǎscǎleanu ◽  
M. Dobromir ◽  
D. Luca
Keyword(s):  
Contact Angle ◽  
Angle Data ◽  
Photocatalytic Tio2 ◽  
Contact Angle Data

scholarly journals Derivation of a pH Dependent Solid-Liquid Interfacial Tension and Theoretical Interpretation of the Physicochemistry of Dewetting in the CO2-Brine-Silica System

2019 ◽  
Vol 11 (2) ◽  
pp. 127
Author(s):  
Mumuni Amadu ◽  
Adango Miadonye
Keyword(s):  
Contact Angle ◽  
Interfacial Tension ◽  
Polymeric Materials ◽  
Petroleum Engineering ◽  
Theoretical Interpretation ◽  
Engineering Practice ◽  
Fundamental Parameter ◽  
Binding Model ◽  
Ph Dependent ◽  
Solid Liquid

The solid-liquid interfacial tension is a fundamental parameter in areas of wettability pertaining to adhesive bonds and petroleum engineering practice. In wettability issues related to surface functionalized polymeric materials design to achieve specific adhesive properties, the solid-liquid interfacial tension can be pH dependent due to amphoteric behavior. In this paper, we have used the theory of pH dependent surface charging and the 2-pk model as well as the site binding model of the electric double layer theory to derive a pH dependent solid-liquid interfacial tension equation. Following the fundamental relationship between solid-liquid interfacial tension and contact angle in light of Young’s equation, we have extended the theoretical basis of the derivation. Consequently, we have also derived a pH dependent cosine of the thermodynamic contact angle. Both equations give satisfactory explanations for observed experimental data available in the literature.

scholarly journals Effect of Direct Current on Solid-Liquid Interfacial Tension and Wetting Behavior of Ga–In–Sn Alloy Melt on Cu Substrate

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Limin Zhang ◽  
Ning Li ◽  
Hui Xing ◽  
Rong Zhang ◽  
Kaikai Song
Keyword(s):  
Contact Angle ◽  
Interfacial Tension ◽  
Direct Current ◽  
Sessile Drop ◽  
Contact Angles ◽  
Current Intensity ◽  
Solute Diffusion ◽  
Wetting Behavior ◽  
Cu Substrate ◽  
Solid Liquid

The effect of direct current (DC) on the wetting behavior of Cu substrate by liquid Ga–25In–13Sn alloy at room temperature is investigated using a sessile drop method. It is found that there is a critical value for current intensity, below which the decrease of contact angle with increasing current intensity is approximately linear and above which contact angle tends to a stable value from drop shape. Current polarity is a negligible factor in the observed trend. Additionally, the observed change in contact angles is translated into the corresponding change in solid-liquid interfacial tension using the equation of state for liquid interfacial tensions. The solid-liquid interfacial tension decreases under DC. DC-induced promotion of solute diffusion coefficient is likely to play an important role in determining the wettability and solid-liquid interfacial tension under DC.

Automated Analysis of Contact Angle Goniometry Data Using DropPy

2020 ◽  
Author(s):  
Michael Orella ◽  
McLain Leonard ◽  
Yuriy Román-Leshkov ◽  
Fikile Brushett
Keyword(s):  
Contact Angle ◽  
Form Factors ◽  
Automated Analysis ◽  
Drop Shape ◽  
Axisymmetric Drop Shape Analysis ◽  
Software Packages ◽  
Analysis Technique ◽  
Angle Data ◽  
Data Collection And Analysis ◽  
Contact Angle Data

<p>Despite advances in contact angle data collection and analysis, the opacity inherent to automated options forces most non-expert researchers to rely on manual techniques and limit assessment of available data. In tandem, with the emergence of inexpensive and powerful hardware in increasingly small form-factors, the development of robust and versatile software packages would enable interrogation of wetting phenomena across a range of platforms. Here, we introduce DropPy, an open-source Python implementation of the classic axisymmetric drop shape analysis technique to fit droplet profiles from images automatically while providing an easy interface through which casual users may interpret their findings.</p>

Automated Analysis of Contact Angle Goniometry Data Using DropPy

2020 ◽  
Author(s):  
Michael Orella ◽  
McLain Leonard ◽  
Yuriy Román-Leshkov ◽  
Fikile Brushett
Keyword(s):  
Contact Angle ◽  
Form Factors ◽  
Automated Analysis ◽  
Drop Shape ◽  
Axisymmetric Drop Shape Analysis ◽  
Software Packages ◽  
Analysis Technique ◽  
Angle Data ◽  
Data Collection And Analysis ◽  
Contact Angle Data

<p>Despite advances in contact angle data collection and analysis, the opacity inherent to automated options forces most non-expert researchers to rely on manual techniques and limit assessment of available data. In tandem, with the emergence of inexpensive and powerful hardware in increasingly small form-factors, the development of robust and versatile software packages would enable interrogation of wetting phenomena across a range of platforms. Here, we introduce DropPy, an open-source Python implementation of the classic axisymmetric drop shape analysis technique to fit droplet profiles from images automatically while providing an easy interface through which casual users may interpret their findings.</p>

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