The same defoamer at the same concentrations produced nearly complete foam suppression in one surfactant system and only partial effect in another. What this means for defoamer selection and why quantitative testing in your actual system is essential.
Resources
Technical articles, reference data, and application notes for scientists working with surfaces, interfaces, and foams. This library is built from the same science that informs our instruments — if you work with surface tension, interfacial rheology, surfactant adsorption, or foam stability, you will find material here that is directly relevant to your work. New content is added regularly.
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Same additive, same concentrations, same conditions — completely different results. What a real defoamer study reveals about why quantitative testing in your actual surfactant system is the only way to select the right additive at the right dose.
Technical Article · Defoamer Testing
Technical Articles
All standard interfacial analysis assumes the interface behaves as a liquid. For proteins, asphaltenes, polymers, and particles at interfaces, that assumption can fail. Direct Laplace pressure measurement detects the transition.
Foam height tells you the net result of everything happening inside your foam, but not which mechanism is responsible. Why quantitative foam stability testing — measuring drainage, liquid fraction, and bubble size simultaneously — reveals what visual observation cannot.
A real comparison of SDS and IPA solutions at the same surface tension shows why interfacial rheology — not equilibrium surface tension — determines foam stability.