Influence of Processing on the Physical Stability of Multiple Emulsions Containing a Green Solvent |
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| Authors: | María Carmen García José Muñoz María Carmen Alfaro José María Franco |
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| Affiliation: | 1. Departamento de Ingeniería Química, Facultad de Química, Universidad de Sevilla, Sevilla, Spain.;2. Departamento de Ingeniería Química, Facultad de Ciencias Experimentales, Universidad de Huelva, Spain. |
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| Abstract: | The influence of the emulsification process on the microstructure and physical stability of model water‐in‐oil‐in‐water (W/O/W) emulsions formulated with a green solvent and a mixture of amphiphilic copolymers as emulsifiers was investigated. Emulsions were prepared by applying a homogenization step with a rotor‐stator device followed by high‐pressure homogenization. Viscous flow tests, transmitted light optical microscopy, globule size distribution (GSD), and multiple light scattering (MLS) measurements were carried out. The GSDs obtained were the result of a recoalescence due to overprocessing and the coalescence of inner droplets with the outer water phase. MLS detected a main destabilization mechanism by creaming. The passing of the emulsion through a high‐pressure homogenizer (HPH) significantly delayed the creaming process. |
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| Keywords: | Emulsification Green solvent Multiple emulsions Water‐in‐oil‐in‐water emulsions |
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