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Application of Population Balance Models in Particle-Stabilized Dispersions

Röhl, Susanne ; Hohl, Lena ; Stock, Sebastian ; Zhan, Manlin ; Kopf, Tobias ; Klitzing, Regine von ; Kraume, Matthias (2023)
Application of Population Balance Models in Particle-Stabilized Dispersions.
In: Nanomaterials, 2023, 13 (4)
doi: 10.26083/tuprints-00023346
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Application of Population Balance Models in Particle-Stabilized Dispersions
Language: English
Date: 11 April 2023
Place of Publication: Darmstadt
Year of primary publication: 2023
Publisher: MDPI
Journal or Publication Title: Nanomaterials
Volume of the journal: 13
Issue Number: 4
Collation: 23 Seiten
DOI: 10.26083/tuprints-00023346
Corresponding Links:
Origin: Secondary publication DeepGreen

In this study, a first approach to model drop size distributions in agitated nanoparticle-stabilized liquid/liquid systems with population balance equations is presented. Established coalescence efficiency models fail to predict the effect of steric hindrance of nanoparticles at the liquid/liquid interface during the film drainage process. A novel modified coalescence efficiency is developed for the population balance framework based on the film drainage model. The elaborate submodel considers the desorption energy required to detach a particle from the interface, representing an energy barrier against coalescence. With an additional implemented function in the population balance framework, the interface coverage rate by particles is calculated for each time step. The transient change of the coverage degree of the phase interface by particles is thereby considered in the submodel. Validation of the modified submodel was performed with experimental data of agitated water-in-oil (w/o) dispersions, stabilized by well-defined spherical silica nanoparticles. The nanospheres with a size of 28 nm are positively charged and were hydrophobized by silanization with dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammoniumchloride. This modeling approach is a first step toward predicting time-resolved dynamic drop size distributions of nanoparticle-stabilized liquid/liquid systems.

Uncontrolled Keywords: Pickering emulsion, stirred tank, interface coverage degree, coalescence efficiency
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-233468
Classification DDC: 500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 05 Department of Physics > Institute for Condensed Matter Physics
Date Deposited: 11 Apr 2023 12:12
Last Modified: 14 Nov 2023 19:05
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/23346
PPN: 509025110
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