Comparison of Vegetable Oil-Silicone Oil Interfacial Tension Data from the du NoüyRing and the Spinning Drop Methods

Abstract

Liquid-liquid interfacial tension is very important in colloid and surface chemistry as it detects the amount of energy required to create a new interface. This makes its measurement very crucial. There are different techniques for measuring it, with the common ones being the du Noüy ring and spinning drop methods. The aim of this work is to compare the low interfacial tension values obtained from the du Noüy ring method with those obtained using the spinning drop method in vegetable oil-silicone oil systems. Low interfacial tension values of various vegetable oil-silicone oil systems were measured with the du Noüy ring and spinning drop methods. The interfacial tension values range from 2.1 to 2.8 mN m‒1 for the du Noüy ring method and 1.0 to 2.7 mN m‒1 for the spinning drop method. These values agree closely)05.0(=p. This shows that both methods can be used for measuring interfacial tension with high accuracy in vegetable oil-silicone oil systems.