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Automated evaluation of contact angles in a three-phase system of selective agglomeration in liquids
- This study aims to an automated evaluation of contact angles in a three-phase system of selective agglomeration in liquids. Wetting properties, quantified by contact angles, are essential in many industries and their processes. Selective agglomeration as a three-phase system consists of a suspension liquid, a heterogeneous solid phase and an immiscible binding liquid. It offers the chance of establishing more efficient separation processes because of the shape-dependent wetting properties of fine particles (size ≤ 10 µm). In the present paper, an experimental setup for contact angle measurements of fine particles based on the Sessile Drop Method is described. Moreover, a new algorithm is discussed, which can be used to automatically compute contact angles from image data captured by a high-speed camera. The algorithm uses a marker-based watershed transform to segment the image data into regions representing the droplet, the carrier plate coated by fine particles, and the background. The main idea is a parametric modelling approach forthe time-dependent droplet’s contour by an ellipse. The results show that the development of the dynamic contact angles towards a static contact angle can be efficiently determined based on this novel technique. These findings are useful for a detailed discrimination of wetting properties of spherical and irregularly shaped particles as well as their wetting kinetics. Also, a better understanding of selective agglomeration processes will be promoted by this user-friendly method.
Author: | Julia Schreier, Orkun Furat, Murat Cankaya, Volker Schmidt, Ulrich Bröckel |
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URN: | urn:nbn:de:hbz:tr5-1188 |
DOI: | https://doi.org/10.5566/ias.2403 |
Parent Title (English): | Image Analysis & Stereology |
Publisher: | Slovenian Society for Stereology and Quantitative Image Analysis |
Document Type: | Article (specialist journals) |
Language: | English |
Date of OPUS upload: | 2022/09/05 |
Year of first Publication: | 2020 |
Publishing University: | Hochschule Trier |
Release Date: | 2022/09/05 |
Tag: | automated detection; contact angle; image data; parametric contour modelling; selective agglomeration; three-phase system |
GND Keyword: | Benetzung; Agglomerieren; Dreiphasensystem; Bildverarbeitung |
Volume: | 39 |
Issue: | 3 |
Page Number: | 10 |
First Page: | 187 |
Last Page: | 196 |
Departments: | Institute / IMiP - Institut für Mikroverfahrenstechnik und Partikeltechnologie |
Dewey Decimal Classification: | 6 Technik, Medizin, angewandte Wissenschaften / 66 Chemische Verfahrenstechnik |
Licence (German): | Creative Commons - CC BY-NC - Namensnennung - Nicht kommerziell 4.0 International |