Open AccessStability of Emulsions Prepared by Vapor Condensation
Author(s) -
Eugenia Teodora Iacob-Tudose
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/877/1/012006
Subject(s) - emulsion , condensation , pulmonary surfactant , emulsified fuel , microemulsion , microscale chemistry , materials science , chemical engineering , thermal stability , supersaturation , thermodynamics , chemistry , organic chemistry , engineering , physics , mathematics education , mathematics
Emulsions, consisting of a mixture of two immiscible liquids, one dispersed in another, with an added amphiphilic surfactant, have been extensively used in different areas such as cosmetics, pharmaceutics, material synthesis for new applications, for example thermal energy storage, new cooling systems etc. The current study focuses on emulsion preparation using a novel technique [1] , namely water vapor condensation on an oil-surfactant layer containing one or two surfactants. The method was incompletely investigated previosly, thus experiments were initiated in order to assess the emulsion stability for different working conditions. Two distinctive configurations were experimentally studied, one, with an adiabatic, constant room temperature bottom and another, with a high, constant temperature bottom. A mixture of two surfactants, Tween 80 and Span 80, was used in different ratios, also, the condensation time and the vapor flowrate were varied. The obtained emulsions stabilities were assessed visually and also, by pH measurements, over couple of week time period. The estimated average emulsion particle size was within the microscale range.