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In cosmetics, there is some interest to solubilized polar antioxidant molecules in oil. This is a matrix that can indeed protect these fragile molecules against oxidation and that makes possible the polar antioxidants transfer through the epidermis in order to be delivered within the dermis. Varying the oil formulation allows the achievement of a high content of antioxidants in a natural vegetable oil using an oleo-eco extraction process. However, it was necessary to characterize this content using quantitative and efficient methods such as High-Performance Thin-Layer Chromatography technique. The aim of this work was to develop a method of antioxidant’s characterization with this technique without a preliminary re-extraction of the antioxidants.

The knowledge of the supramolecular structure of a polar oil that contains a bio-based extractant is necessary for a deep understanding of solubilization processes of polar species in oils. This study focuses on a ternary system containing the polyglyceryl-3-diisostearate (PG3DS), a bio-based extractant in cosmetic formulation, methyl esters (ME-Cn) as model diluent and water. The realms of existence of monophasic regions were determined in the ternary phase diagrams varying the chain lengths, Cn, of the diluent between 7 and 14 carbons. We provide for the first time fundamental information on the impact of the water content and of the organic diluent on the miscibility and aggregation properties of PG3DS in MEs. The structure of reverse PG3DS aggregates in the monophasic region were accessed by combining small and wide angle X-ray scattering (SWAXS) experiments and molecular dynamics simulation. [ABSTRACT FROM AUTHOR]

We report the synthesis by RAFT polymerization of well-defined diblock copolymers bearing carbamoylmethylphosphonate moieties which proved to sorb gadolinium. These poly(diethyl-6-(acrylamido)hexylcarbamoylmethylphosphonate-b-acrylic acid) (P(CPAAm6C-b-AA)) copolymers were able to self-assemble as a function of temperature, above their cloud point value. [ABSTRACT FROM AUTHOR]

Knowledge of the supramolecular structure of the organic phase containing amphiphilic ligand molecules is mandatory for full comprehension of ionic separation during solvent extraction. Existing structural models are based on simple geometric aggregates, but no consensus exists on the interaction potentials. Herein, we show that molecular dynamics crossed with scattering techniques offers key insight into the complex fluid involving weak interactions without any long-range ordering. Two systems containing mono- or diamide extractants in heptane and contacted with an aqueous phase were selected as examples to demonstrate the advantages of coupling the two approaches for furthering fundamental studies on solvent extraction. [ABSTRACT FROM AUTHOR]