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AqibH
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I'm having trouble finding any sources which describe how to accurately measure the contact angle between immiscible liquids in a tube. Any help would be appreciated.
AqibH said:I'm having trouble finding any sources which describe how to accurately measure the contact angle between immiscible liquids in a tube.
AqibH said:I am interested in the contact angle itself as I already have measured the interfacial tension (but not in the same cylindrical tube). I have not been able to find any information on measuring the contact angle of immiscible liquids inside a tube. It seems all the focus of measuring contact angles has been for liquid-vapor-solid interfaces on a flat plane or in a tube.
By 'accurately', I meant a method which was reliable and not some kind of homemade method which I have seen some papers use. I am only interested in the static contact angle as I understand that measuring dynamic contact angles can be difficult. I also understand that the more you zoom on an image the contact angle will change. Basically, I was hoping that there existed some method which is used to measure the angle and it was a method which could be consistently repeatable.
The tube is cylindrical. I understand the issues of optical measurements but this is what I am leaning towards. We don't really have the equipment to measure contact angle of even one liquid in a tube (there are published methods for this liquid-vapor-solid interface).
The contact angle of immiscible liquids in a tube is the angle formed between the liquid-liquid interface and the solid surface of the tube. It is a measure of the wettability of the solid surface by the liquid.
The contact angle can be measured using a variety of techniques, such as the sessile drop method or the captive bubble method. These methods involve placing a droplet or bubble of the liquid at the interface and measuring the angle formed.
The contact angle is influenced by several factors, including the surface tension of the liquids, the surface chemistry of the solid surface, and the roughness of the surface. Temperature and pressure can also have an impact on the contact angle.
The contact angle is an important parameter in various fields of science, such as materials science, chemistry, and biology. It can provide insights into the surface properties of materials and how they interact with different liquids, which can have practical applications in the development of new materials and technologies.
Yes, the contact angle can be altered by modifying the surface chemistry of the solid surface or by introducing surfactants. This can be useful in controlling the wetting behavior of liquids on different surfaces or in creating self-cleaning surfaces.