Aqueous dispersions of organogel nanoparticles – potential systems for cosmetic and dermo-cosmetic applications
P. Kirilov, S. Rum, E. Gilbert, L. Roussel, D. Salmon, R. Abdayem, C. Serre, C. Villa, M. Haftek, F. Falson and F. Pirot
Article first published online: 16 MAY 2014 | DOI: 10.1111/ics.12131
Gelled particles of organic liquid and 12-hydroxystearic acid (organogelator) were obtained by hot emulsification (T>Tgel), with a surfactant (acetylated glycol stearate) and polymers (sodium hyaluronate and polyvinyl alcohol) as stabilizing agents, and cooling at room temperature (T<Tgel). An organic UVB sunscreen molecule, obtained by microwave activation, was used as a hydrophobic model molecule. The physicochemical properties of the starting organogel (gelation tests; rheological study) and the dispersed gelled particles (rheological study; particle mean size, size distribution, zeta-potential measurements; physical stability evaluation; UVB absorption and water resistance ability) were studied. The synthesis of sunscreen compound using microwave activation was also described.