Predicting the Effect of Nonionic Surfactants of Interfacial Tensions

The Behavior of Sorbitan Surfactants at the Water–Oil Interface: Straight-Chained Hydrocarbons from Pentane to Dodecane as an Oil Phase

“…Despite their wide use, rather few studies have been conducted on sorbitan esters concerning interfacial and physico-chemical properties (1,(6)(7)(8)(9)(10)(11)(12)(13). Also, the composition of the oil phase has not been of great interest.…”

“…To obtain a maximum benefit out of the use of surfactants in technological processes, a good knowledge of their interfacial behavior is demanded. Changes in surfactant properties due to a change in the hydrophilic headgroup structure have been well investigated (1)(2)(3)(4)(5). The influence of hydrophobic chain structure on interfacial properties has been more open for exploration.…”

The Effect of Temperature on Sorbitan Surfactant Monolayers

“…For surfactants, the structure of aliphatic chains as well as the polar headgroups are equally important in determining their properties and performances at different interfaces such as air/liquid, liquid/liquid, and solid/liquid (9). Changes in surfactant properties due to change in headgroup structure have been thoroughly investigated (10)(11)(12)(13)(14), but the influence of the hydrophobic chain structure on the interfacial properties of surfactants has been more open for exploration (15).…”

Surface Pressure, Hysteresis, Interfacial Tension, and CMC of Four Sorbitan Monoesters at Water–Air, Water–Hexane, and Hexane–Air Interfaces

“…To our knowledge, all the studies of sorbitan esters concern only a few members of the sorbitan ester family. Span 20, sorbitan monolaurate (3)(4)(5)(6), and Span 80, sorbitan monooleate (4)(5)(6)(7)(8)(9)(10), are the most widely used, but also Span 40, sorbitan monopalmitate (7), and Span 83, sorbitan sesquioleate, or Span 85, sorbitan trioleate, have been used a few times (5-7). There is no article on systematic research on the surface and interfacial properties of sorbitan esters.…”