Emulsification using Fire-fighting surfactants
The aim is to understand how the addition of a common hydrogenated/deuterated oil affects the size of the self-assembled structure of three common industrial fluorotelomer surfactants used in fire-fighting foam formulations (Figure 1) using contrast variation SANS. These surfactants have already been studied individually and now will be studied in the presence of different concentrations of oil (cyclohexane), over both a range of surfactant concentrations which are commensurate with commercial fire-fighting foam formulations. Fire-fighting foams are generally employed on liquid fuel fires, therefore the degree of emulsification is of great interest to understand (as this can have adverse effects of foam stability (Figure 1)) and this experiments represents a model system close to practical application conditions in which we can study this effect. This is the fourth stage in a 3-year program, including SANS, so that F-carbon surfactants can be replaced by more environmentally-responsive low-F or hydrocarbon analogues. Chris Hill is a 3rd year PhD student fully funded by fire-fighting technology company Angus Fire (French subsidiary company, Eau et Feu).
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EASTOE Julian; DAVIES Craig; GRILLO Isabelle and Christopher Hill. (2018). Emulsification using Fire-fighting surfactants. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1558
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