Interfacial rheology of low interfacial tension systems using a new oscillating spinning drop method

Journal of Colloid and Interface Science
José M ZamoraJean-Louis Salager

Abstract

When surfactants adsorb at liquid interfaces, they not only decrease the surface tension, they confer rheological properties to the interfaces. There are two types of rheological parameters associated to interfacial layers: compression and shear. The elastic response is described by a storage modulus and the dissipation by a loss modulus or equivalently a surface viscosity. Various types of instruments are available for the measurements of these coefficients, the most common being oscillating pendent drops instruments and rheometers equipped with bicones. These instruments are applicable to systems with large enough interfacial tensions, typically above a few mN/m. We use a new type of instrument based on spinning drop oscillations, allowing to extend the interfacial rheology studies to low and ultralow interfacial tension systems. We present examples of measurements with systems of high and low tension, discuss the possible artifacts and demonstrate the capability of this new technique. We emphasize that the data shown for low interfacial tensions are the first reported in the literature. The instrument is potentially interesting for instance in enhanced oil recovery or demulsification studies.

Citations

Jun 27, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Fei WangShenwen Fang
Dec 30, 2018·Journal of Colloid and Interface Science·Thomas M KollerAndreas P Fröba
Jul 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ana M ForgiariniJean-Louis Salager
Jul 21, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Stephan Handschuh-WangXuechang Zhou
Jul 28, 2020·Journal of Colloid and Interface Science·Yue WeiHongbin Zhang
Jul 11, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Ronald MarquezJean-Louis Salager
Nov 3, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Milad EftekhariKerstin Eckert

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