Optimization of Green Multiple Emulsions Processing to Improve Their Physical Stability |
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| Authors: | María Carmen García José Muñoz María Carmen Alfaro José María Franco |
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| Affiliation: | 1. Universidad de Sevilla, Departamento de Ingeniería Química, Facultad de Química, Sevilla, Spain;2. Universidad de Huelva, Pro2TecS – Chemical Process and Product Technology Research Center, Facultad Ciencias Experimentales, Huelva, Spain |
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| Abstract: | The effect of processing protocol on physical stability and the microstructure of water‐in‐oil‐in‐water multiple emulsions containing a mixture of two amphiphilic copolymers with opposed hydrophilic‐lipophilic balance as emulsifiers and a green solvent, 2‐ethylhexyl lactate, as the dispersed phase, has been assessed. Emulsions were obtained in at least two steps: a homogenization step by using a rotor‐stator device, followed by one or two homogenization steps carried out in a high‐pressure device that used microfluidizer technology. To study the microstructure and physical stability of these emulsions, a combination of different techniques, such as transmitted‐light optical microscopy, globule size distribution, viscous flow tests, and multiple light scattering measurements, were performed. |
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| Keywords: | Emulsification Green solvents Multiple emulsions Multiple light scattering Physical stability |
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