Experimental Study on Dynamic Interfacial Tension with Mixture of SDS–PEG as Surfactants in a Coflowing Microfluidic Device

Langmuir ◽  
2012 ◽  
Vol 28 (6) ◽  
pp. 3120-3128 ◽  
Author(s):  
C. P. Tostado ◽  
J. H. Xu ◽  
A. W. Du ◽  
G. S. Luo
Keyword(s):  
Experimental Study ◽  
Interfacial Tension ◽  
Microfluidic Device ◽  
Dynamic Interfacial Tension

Effects of cation salinity on the dynamic interfacial tension and viscoelasticity of a water-oil system

2021 ◽  
pp. 108970
Author(s):  
Mohsen Mahmoudvand ◽  
Aliyar Javadi ◽  
Peyman Pourafshary ◽  
Hamid Vatanparast ◽  
Alireza Bahramian
Keyword(s):  
Interfacial Tension ◽  
Dynamic Interfacial Tension

scholarly journals Interfacial Tension Measurements in Microfluidic Quasi-Static Extensional Flows

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 272
Author(s):  
Doojin Lee ◽  
Amy Q. Shen
Keyword(s):  
Interfacial Tension ◽  
Microfluidic Device ◽  
Extensional Flow ◽  
Immiscible Fluids ◽  
Droplet Microfluidics ◽  
Channel Height ◽  
Deformation Model ◽  
Droplet Deformation ◽  
Extensional Flows ◽  
2D Model

Droplet microfluidics provides a versatile tool for measuring interfacial tensions between two immiscible fluids owing to its abilities of fast response, enhanced throughput, portability and easy manipulations of fluid compositions, comparing to conventional techniques. Purely homogeneous extension in the microfluidic device is desirable to measure the interfacial tension because the flow field enables symmetric droplet deformation along the outflow direction. To do so, we designed a microfluidic device consisting of a droplet production region to first generate emulsion droplets at a flow-focusing area. The droplets are then trapped at a stagnation point in the cross junction area, subsequently being stretched along the outflow direction under the extensional flow. These droplets in the device are either confined or unconfined in the channel walls depending on the channel height, which yields different droplet deformations. To calculate the interfacial tension for confined and unconfined droplet cases, quasi-static 2D Darcy approximation model and quasi-static 3D small deformation model are used. For the confined droplet case under the extensional flow, an effective viscosity of the two immiscible fluids, accounting for the viscosity ratio of continuous and dispersed phases, captures the droplet deformation well. However, the 2D model is limited to the case where the droplet is confined in the channel walls and deforms two-dimensionally. For the unconfined droplet case, the 3D model provides more robust estimates than the 2D model. We demonstrate that both 2D and 3D models provide good interfacial tension measurements under quasi-static extensional flows in comparison with the conventional pendant drop method.

scholarly journals Interfacial Tension Sensor for Low Dosage Surfactant Detection

2021 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
Piotr Pawliszak ◽  
Bronwyn H. Bradshaw-Hajek ◽  
Christopher Greet ◽  
William Skinner ◽  
David A. Beattie ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Microfluidic Device ◽  
Profile Analysis ◽  
Simple Method ◽  
Bubble Generation ◽  
Flotation Process ◽  
Line Measurement ◽  
Tension Sensor ◽  
Low Dosage

Currently there are no available methods for in-line measurement of gas-liquid interfacial tension during the flotation process. Microfluidic devices have the potential to be deployed in such settings to allow for a rapid in-line determination of the interfacial tension, and hence provide information on frother concentration. This paper presents the development of a simple method for interfacial tension determination based on a microfluidic device with a flow-focusing geometry. The bubble generation frequency in such a microfluidic device is correlated with the concentration of two flotation frothers (characterized by very different adsorption kinetic behavior). The results are compared with the equilibrium interfacial tension values determined using classical profile analysis tensiometry.

The Zero Time Dynamic Interfacial Tension

2002 ◽  
Vol 23 (4) ◽  
pp. 455-464 ◽  
Author(s):  
C. J. van Oss ◽  
R. F. Giese ◽  
R. J. Good
Keyword(s):  
Interfacial Tension ◽  
Time Dynamic ◽  
Dynamic Interfacial Tension ◽  
Zero Time
Sign in / Sign up

Export Citation Format

Share Document