Projects per year
Abstract
Porous solid materials commonly undergo coating processes during their manufacture, where liquids are put in contact with solids for different purposes. The study of liquid penetration in porous substrates is a process of high relevance in activities in several industries. In particular, powder detergents are subject to coating with surfactants that will boost their performance, although this may affect the flowability and even cause caking of the particulate material, which can be detrimental to consumer acceptance. Here we present a methodology to make compacted preparations of powders relevant to detergent making and evaluate the internal structure of such porous substrates by means of X-ray microcomputed tomography. Liquid penetration in the preparation and the total mass uptake of fluid were monitored by a gravimetric technique based on a modified Wilhelmy plate method consisting of consecutive cycles. Taking into account the geometry of the system, two models were proposed to describe the liquid uptake based on the process being driven by mass (model 1) or pressure (model 2) gradients. A comparison between both from statistical and physical points of view led to the conclusion that the latter was more appropriate for describing the process and retrieving values of the permeability of the solid between 0.03 × 10–12 and 0.95 × 10–12 m2. Finally, with the parameters retrieved from model 2, the force balance observed throughout the experiment was simulated satisfactorily.
Original language | English |
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Pages (from-to) | 7015–7027 |
Number of pages | 13 |
Journal | Langmuir |
Volume | 33 |
Issue number | 28 |
Early online date | 28 Jun 2017 |
DOIs | |
Publication status | Published - 18 Jul 2017 |
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Dive into the research topics of 'Understanding and modeling the liquid uptake in porous compacted powder preparations'. Together they form a unique fingerprint.Projects
- 2 Finished
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Reducing sodium in the UK diet through food processing and ingredient design
Bakalis, S. (Principal Investigator)
Biotechnology & Biological Sciences Research Council
31/03/17 → 31/12/18
Project: Research Councils
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Design of Complex Microstructures & Processes for Advanced Salt Reduction in Foods
Bakalis, S. (Principal Investigator) & Norton, I. (Co-Investigator)
Engineering & Physical Science Research Council
1/05/07 → 31/10/10
Project: Research