Welcome to my beginner's guide to Surface Tension, Surfactants, and Micelles. In this blog, we'll be exploring the basics of these topics in order to better understand their role in industry and everyday life. Surface tension is a crucial property of a liquid that allows it to resist being pulled apart by gravity, and surfactants are molecules that can lower the surface tension of water. Micelles are spherical structures that are formed when surfactants reach a certain concentration in water, and they play an important role in many cleaning and industrial processes. We'll be discussing all of this and more in this blog, so let's get started!Read More
I keep running into this kind of thing.
There is a recurring question we are asked as instrument manufacturers:
"Is my equipment working OK?"
This is of particular concern when a production process seems to be off standard.
QC says: "Clearly Process Problems"
Production says: "Bad Test Results"
These challenges arise often.
What to do?
I was musing, the other day on the designs of two ring tensiometers. One of them is called an interfacial tensiometer and the other simply a tensiometer. The plain tensiometer works only with an upward pull and the interfacial works with both an upward pull as well as a downward push. Before I get to my question a couple of definition might be useful.
The definition of Liquid Surface Tension is simple.
It's the force that keeps a liquid from flying off into space.
However, the measurement of surface tension can take many forms, which can be confusing. In an attempt to get some clarity, we have articulated two principle measurement concepts in this article: drop-based measurement and force-based measurement.
Topics: Automatic Digital Tensiometer, Automatic Surface Tension Measurment, Surface Tension Measurement, Surface Tension, Interfacial Tensiometer, interfacial tension, tensiometers, du Nouy tensiometer, surface tension instruments, surface tension analysis
It’s easy to pretend you know the operating terms surrounding contact angle measurement. But do you really? For industries such as coatings, printing, and oil recovery, contact angle testing is an essential component of the production and/or quality assurance process. Having a competent understanding of these terms will make it so much easier to choose the right instrument for your company - one you can be certain will do what you need it to do.Read More
When tempted to think I know all there is about surface tension measurement, further information brings me back to earth. I’m conversant with the principal applications: surfactant analysis, plating, detecting contaminants, development of ink and the like. I have assisted customers to set up and calibrate duNouy Ring tensiometers for most applications -- all the while taking for granted that the Ring technique was the method of choice -- with only infrequent questions arising about Wilhelmy Plate tensiometers.
Topics: Wilhelmy Plates, duNouy Rings, Tensiometer, Surface Tension, interfacial surface tension, Liquid Properties, surface tension instruments, surface tension analysis, Digital tensiometer, automatic Tensiometer
Topics: Automatic Digital Tensiometer, Automatic Surface Tension Measurment, Surface Tension Measurement, Surface Tension, du Nouy tensiometer, Liquid Properties, surface tension instruments, surface tension analysis, Digital tensiometer, automatic Tensiometer
An understandable definition of surface tension: “The attraction force between molecules at the surface of a liquid. The force that keeps if from flying off into space”.Read More
A classical definition of Contact Angle:Read More
Contact angle and surface tension. The two terms are never far apart. Run a Google search of "contact angle" right now and see for yourself. You'll often see the terms mentioned within a breath of one another because contact angle and surface tension are two approaches to surface analysis - the study of how a surface interacts with other materials or components. Generally speaking, there is also a relationship between the two measurements, one that tends not to be very clearly explained in other resources. I hope to remedy that today.Read More