Automated sampling and spectroscopic resolution of structure and composition of hydrogenous and fluorinated surfactant mixed micelles
Fluorocarbon surfactants are used for example in fire-fighting foams, paints, and as stain repellents. Attractive properties include their degradation resistance and surfactant properties with lower surface tension than C-H analogues. However, due to their stability they accumulate in the environment, can leach to the groundwater and contaminate drinking water reservoirs or can be taken up by plants and soil organisms. The present proposal extends studies on a model mixed system of hydrogenous and fluorinated surfactants, for which there is already background information but little detailed structural information. The large number of samples required for the analysis of mixtures emphasises the need for automated sample delivery. We wish to demonstrate the usefulness of a flow-through cell with automatic sample mixing using an HPLC pump, and additional information to constrain the model from in-line marker dye fluorescence and density measurements. Understanding fluorocarbon surfactant structural behaviour and partitioning of fluorescent marker dyes (pyrene) will allow optimisation of their use as well as diminution of adverse effects both for health and in the environment.
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HELLSING Maja; DICKO Cedric; JACKSON Andrew; MARTEL Anne; PORCAR Lionel and RENNIE Adrian R.. (2018). Automated sampling and spectroscopic resolution of structure and composition of hydrogenous and fluorinated surfactant mixed micelles. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1533
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