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Systematic study of microchannels to evaluate coalescence in oil-in-water and water-in- oil emulsions

Grant number: 18/18103-4
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): February 01, 2019
Effective date (End): January 31, 2020
Field of knowledge:Agronomical Sciences - Food Science and Technology - Food Engineering
Principal researcher:Rosiane Lopes da Cunha
Grantee:Tatiana Porto dos Santos
Supervisor abroad: Patrick Jean Rene Tabeling
Home Institution: Faculdade de Engenharia de Alimentos (FEA). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Research place: ParisTech, France  
Associated to the scholarship:17/18109-0 - Development of an emulsion stability analyzer from microfluidics, BP.DR


Developing an emulsion involves a number of steps but kinetic stability is the most crucial property to determine its industrial application. The general aim in food and pharmaceutical areas is to improve emulsions stability, however in some bioprocesses the hindrance of this property is desired. For this reason, study of different compounds influencing emulsions stability is important. Furthermore, the formation of a stable emulsion in several processes is a drawback, making necessary to evaluate emulsions stability in order to determine the downstreaming (oil separation) conditions and the necessary amount of demulsifiers to induce emulsions destabilization (e.g. bioprocesses and petroleum industries). In this sense, the application of microfluidic devices is an interesting and low-cost concept to induce emulsions coalescence. The scientific outcomes can be useful to obtain insights to evaluate emulsions stability as well as to improve the downstreaming process, and can be applied in different research and industrial fields. Therefore, the objective of this project will be to investigate emulsions formation and coalescence within microchannels in order to understand the phenomena involved in emulsions (de)stabilization. Moreover, demulsifier agents can be injected and micromixed with emulsions to induce coalescence in the most stable emulsions. The group of Patrick Tabeling has reported many studies related to microchannels and micromixers development. In addition, he is currently the director of the Institut Pierre-Gilles de Gennes (an institution in France dedicated to microfluidics and its applications), presenting an important background in microfluidic technologies. On the other hand, Rosiane Lopes da Cunha's group (in Brazil) has the expertise in emulsions and experience in formation of emulsions in microfluidic devices. In this context, we believe that this joint collaboration will be essential for a better understanding of emulsions (de)stabilization when subjected to different microchannels conditions.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PORTO SANTOS, TATIANA; CEJAS, CESARE M.; CUNHA, ROSIANE LOPES; TABELING, PATRICK. Unraveling driving regimes for destabilizing concentrated emulsions within microchannels. SOFT MATTER, v. 17, n. 7, p. 1821-1833, FEB 21 2021. Web of Science Citations: 0.
PORTO SANTOS, TATIANA; CUNHA, ROSIANE LOPES; TABELING, PATRICK; CEJAS, CESARE M. Colloidal particle deposition on microchannel walls, for attractive and repulsive surface potentials. Physical Chemistry Chemical Physics, v. 22, n. 30, p. 17236-17246, AUG 14 2020. Web of Science Citations: 1.

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