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Luis A. Trujillo-Cayado,M. Carmen Alfaro,M.C. García,J. Muñoz 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.46 No.-
The target of this work was to compare the yield of three homogenization processes (two different rotor–stator devices and a high-pressure valve homogenizer) for the development of O(green solvent)/Wemulsions containing an eco-friendly emulsifier. Rheology, laser diffraction, optical microscopy andmultiple light scattering were the main techniques used to assess the efficiency of homogenizationmethods. First the best values of the processing variables were obtained for each homogenizer andsecondly a comparison of properties of emulsions prepared with these optimum processing conditionswas carried out. The results obtained revealed that the more stable emulsions were prepared with anUltraturrax T25.
Luis A. Trujillo-Cayado,M. Carmen Alfaro,Jenifer Santos,Nuria Calero,José Muñoz 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.66 No.-
This contribution deals with the development of emulsions formulated using thyme essential oil and a new biomass-derived surfactant. In addition, this work extends our knowledge concerning the factors that can influence stability and droplet size distributions of microfluidized emulsions, such as the geometry of the rotor–stator used and the homogenization rate in the primary homogenization. Stable thyme oil-in-water emulsions (30 wt%) containing submicron droplets were formed. Interestingly, laser diffraction results reveal that mean droplet sizes are mainly controlled by homogenization rates and polydispersity by the rotor–stator geometry used in the first step of homogenization. In addition, higher droplet sizes for pre-emulsions seem to be a key factor in order to reduce both the degree of recoalescence and the size of the droplets in the second homogenization step. Furthermore, higher droplet sizes in the pre-emulsion favour higher physical stability of the final emulsions. Finally, this research highlights the importance of controlling primary homogenization conditions for the physical stability of microfluidized emulsions that contain natural ingredients.