Creep and drainage in the fast destabilization of emulsions

Riande I. Dekker; Antoine Deblais; Bastiaan Veltkamp; Peter Veenstra; Willem K. Kegel; Daniel Bonn

doi:10.1063/5.0039097

Creep and drainage in the fast destabilization of emulsions

Riande I. Dekker^*
, Antoine Deblais
, Bastiaan Veltkamp
, Peter Veenstra
, Willem K. Kegel
, Daniel Bonn

^*Corresponding author for this work

University of Amsterdam
Royal Dutch Shell PLC

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The destabilization of emulsions is important for many applications but remains incompletely understood. We perform squeeze flow measurements on oil-in-water emulsions, finding that the spontaneous destabilization of emulsions is generally very slow under normal conditions, with a characteristic time scale given by the drainage of the continuous phase and the coalescence of the dispersed phase. We show that if the emulsion is compressed between two plates, the destabilization can be sped up significantly; on the one hand, the drainage is faster due to the application of the squeezing force. On the other hand, creep processes lead to rearrangements that also contribute to the destabilization.

Original language	English
Article number	033302
Pages (from-to)	1-9
Journal	Physics of Fluids
Volume	33
Issue number	3
DOIs	https://doi.org/10.1063/5.0039097
Publication status	Published - 1 Mar 2021

Bibliographical note

Funding Information:
This work was part of the research program Controlling Multiphase Flow under Project No. 680-91-012, which is partly financed by the Dutch Research Council (NWO) and co-funded by TKI-E&I with the supplementary grant TKI-Toeslag for the Top Consortia for Knowledge and Innovation (TKI's) of the Ministry of Economic Affairs and Climate Policy. This work took place within the framework of the Institute of Sustainable Process Technology. The authors thank the workshop of the University of Amsterdam for their technical assistance. A.D. acknowledges funding from the European Union's Horizon 2020 research and innovation programme under the Individual Marie Sklokodowska-Curie fellowship Grant Agreement No. 798455. This work was partially funded by Evodos, Shell Global Solutions International B.V., and Unilever R&D.

Funding Information:
This work was part of the research program Controlling Multiphase Flow under Project No. 680-91-012, which is partly financed by the Dutch Research Council (NWO) and co-funded by TKI-E&I with the supplementary grant “TKI-Toeslag” for the Top Consortia for Knowledge and Innovation (TKI’s) of the Ministry of Economic Affairs and Climate Policy. This work took place within the framework of the Institute of Sustainable Process Technology. The authors thank the workshop of the University of Amsterdam for their technical assistance. A.D. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Individual Marie Skłokodowska-Curie fellowship Grant Agreement No. 798455. This work was partially funded by Evodos, Shell Global Solutions International B.V., and Unilever R&D.

Publisher Copyright:
© 2021 Author(s).

Funding

This work was part of the research program Controlling Multiphase Flow under Project No. 680-91-012, which is partly financed by the Dutch Research Council (NWO) and co-funded by TKI-E&I with the supplementary grant TKI-Toeslag for the Top Consortia for Knowledge and Innovation (TKI's) of the Ministry of Economic Affairs and Climate Policy. This work took place within the framework of the Institute of Sustainable Process Technology. The authors thank the workshop of the University of Amsterdam for their technical assistance. A.D. acknowledges funding from the European Union's Horizon 2020 research and innovation programme under the Individual Marie Sklokodowska-Curie fellowship Grant Agreement No. 798455. This work was partially funded by Evodos, Shell Global Solutions International B.V., and Unilever R&D. This work was part of the research program Controlling Multiphase Flow under Project No. 680-91-012, which is partly financed by the Dutch Research Council (NWO) and co-funded by TKI-E&I with the supplementary grant “TKI-Toeslag” for the Top Consortia for Knowledge and Innovation (TKI’s) of the Ministry of Economic Affairs and Climate Policy. This work took place within the framework of the Institute of Sustainable Process Technology. The authors thank the workshop of the University of Amsterdam for their technical assistance. A.D. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Individual Marie Skłokodowska-Curie fellowship Grant Agreement No. 798455. This work was partially funded by Evodos, Shell Global Solutions International B.V., and Unilever R&D.

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10.1063/5.0039097

5.0039097Final published version, 1.7 MBLicence: Taverne

Cite this

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title = "Creep and drainage in the fast destabilization of emulsions",

abstract = "The destabilization of emulsions is important for many applications but remains incompletely understood. We perform squeeze flow measurements on oil-in-water emulsions, finding that the spontaneous destabilization of emulsions is generally very slow under normal conditions, with a characteristic time scale given by the drainage of the continuous phase and the coalescence of the dispersed phase. We show that if the emulsion is compressed between two plates, the destabilization can be sped up significantly; on the one hand, the drainage is faster due to the application of the squeezing force. On the other hand, creep processes lead to rearrangements that also contribute to the destabilization. ",

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note = "Funding Information: This work was part of the research program Controlling Multiphase Flow under Project No. 680-91-012, which is partly financed by the Dutch Research Council (NWO) and co-funded by TKI-E\&I with the supplementary grant TKI-Toeslag for the Top Consortia for Knowledge and Innovation (TKI's) of the Ministry of Economic Affairs and Climate Policy. This work took place within the framework of the Institute of Sustainable Process Technology. The authors thank the workshop of the University of Amsterdam for their technical assistance. A.D. acknowledges funding from the European Union's Horizon 2020 research and innovation programme under the Individual Marie Sklokodowska-Curie fellowship Grant Agreement No. 798455. This work was partially funded by Evodos, Shell Global Solutions International B.V., and Unilever R\&D. Funding Information: This work was part of the research program Controlling Multiphase Flow under Project No. 680-91-012, which is partly financed by the Dutch Research Council (NWO) and co-funded by TKI-E\&I with the supplementary grant “TKI-Toeslag” for the Top Consortia for Knowledge and Innovation (TKI{\textquoteright}s) of the Ministry of Economic Affairs and Climate Policy. This work took place within the framework of the Institute of Sustainable Process Technology. The authors thank the workshop of the University of Amsterdam for their technical assistance. A.D. acknowledges funding from the European Union{\textquoteright}s Horizon 2020 research and innovation programme under the Individual Marie Sk{\l}okodowska-Curie fellowship Grant Agreement No. 798455. This work was partially funded by Evodos, Shell Global Solutions International B.V., and Unilever R\&D. Publisher Copyright: {\textcopyright} 2021 Author(s).",

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AU - Kegel, Willem K.

AU - Bonn, Daniel

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N2 - The destabilization of emulsions is important for many applications but remains incompletely understood. We perform squeeze flow measurements on oil-in-water emulsions, finding that the spontaneous destabilization of emulsions is generally very slow under normal conditions, with a characteristic time scale given by the drainage of the continuous phase and the coalescence of the dispersed phase. We show that if the emulsion is compressed between two plates, the destabilization can be sped up significantly; on the one hand, the drainage is faster due to the application of the squeezing force. On the other hand, creep processes lead to rearrangements that also contribute to the destabilization.

AB - The destabilization of emulsions is important for many applications but remains incompletely understood. We perform squeeze flow measurements on oil-in-water emulsions, finding that the spontaneous destabilization of emulsions is generally very slow under normal conditions, with a characteristic time scale given by the drainage of the continuous phase and the coalescence of the dispersed phase. We show that if the emulsion is compressed between two plates, the destabilization can be sped up significantly; on the one hand, the drainage is faster due to the application of the squeezing force. On the other hand, creep processes lead to rearrangements that also contribute to the destabilization.

U2 - 10.1063/5.0039097

DO - 10.1063/5.0039097

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JO - Physics of Fluids

JF - Physics of Fluids

IS - 3

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ER -

Creep and drainage in the fast destabilization of emulsions

Abstract

Bibliographical note

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