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Updated: May 28, 2026

Water in Oil Emulsions: A New System for Assembling Water-soluble Chlorophyll-binding Proteins with Hydrophobic Pigments
Published on: March 21, 2016
Novel thermo-responsive coloring phenomena in water/surfactant/oil emulsions
Clara Morita1, Tetsuya Aoyama, Yoshiro Imura
1Department of Industrial Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Tokyo 162-8601, Japan.
Abstract:
Emulsions comprising a dual-surfactant system of a long-chain amidoamine derivative and a quaternary ammonium salt developed an iridescent color at a specific temperature region. The emulsions underwent phase inversion on heating from an O/W emulsion to a W/O emulsion, passing through a periodical lamellar structure which developed a characteristic interference color. Interestingly, the color and the coloring temperature can be independently controlled by adjusting the concentration of surfactants, respectively.
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