Ultrasonic study on emulsions stabilized with particles of different origin
| Autor: | Bielas, Rafał, Rozynek, Zbigniew, Hornowski, Tomasz, Jozefczak, Arkadiusz |
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| Přispěvatelé: | Adam Mickiewicz University in Poznań (UAM) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Forum Acusticum Forum Acusticum, Dec 2020, Lyon, France. pp.1425-1425, ⟨10.48465/fa.2020.0104⟩ |
| DOI: | 10.48465/fa.2020.0104⟩ |
| Popis: | International audience; Pickering emulsions, i.e. emulsions stabilized solely by particles, have gained great scientific interest for the last decades. It is due to their potential applications in various fields where stabilization by particles rather than surfactants is highly motivated, such as in the food industry. Pickering droplets can be also utilized as templates for fabricating colloidal capsules used as drug carriers in targeted therapy. In order to make this class of colloids practicable, it is important to possess manageable tools for monitoring of formation process and characterizing their properties. In our work, we utilized consecutive action of ultrasound homogenization and electric field to form stable emulsion droplets coated by particles of different types. Our procedure enabled to produce an emulsion with narrow size distribution whilst obtaining high throughput. Ultrasound was used to follow the evolution of a macroscopic structure of the system and, as a result, to indicate when stabilization is achieved. In accordance with the ultrasonic attenuation coefficient of the emulsion, it was possible to determine droplet size distribution and reveal the influence of the electric field on completing particle shells around droplets. We will present that experimental and theoretical ultrasonic studies when combined with optical measurements can give a powerful opportunity to characterize Pickering emulsions that differ with acoustical properties from classic emulsions stabilized with surfactants and remain not fully explored in terms of acoustical studies. |
| Databáze: | OpenAIRE |
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