A quantitative framework for the formation of liquid marbles and hollow granules from hydrophobic powders

Eshtiaghi, N 2012, 'A quantitative framework for the formation of liquid marbles and hollow granules from hydrophobic powders', Powder Technology, vol. 223, pp. 65-76.


Document type: Journal Article
Collection: Journal Articles

Attached Files
Name Description MIMEType Size
n2006027984.pdf Accepted Manuscript application/pdf 1.97MB
Title A quantitative framework for the formation of liquid marbles and hollow granules from hydrophobic powders
Author(s) Eshtiaghi, N
Year 2012
Journal name Powder Technology
Volume number 223
Start page 65
End page 76
Total pages 11
Publisher Elsevier S.A.
Abstract Liquid marbles are micro reservoirs of fluid surrounded by a powder shell. Their unique properties show promise for high-value technological applications in the medical, biotechnology, chemical and pharmaceutical industries. In this study, liquid marbles were prepared from six mixtures of water and glycerol by releasing droplets from different heights onto a loosely packed powder bed using a 1 mL syringe. Pictures of the liquid marbles were taken with a stereo microscope (SMZ series) with a 3MP Motic camera. The powders used were Aerosil R202, hydrophobic glass ballotini and PTFE spheres. In this paper, our previous proposed qualitative framework for liquid marble formation via solid spreading coefficient mechanism was updated in light of recent new research and the quantitative criteria for each step was established and validated. The last step of the framework was modified to reflect the physical flow mechanism now understood to be responsible for liquid marble formation. The revised framework presents the step by step process and quantitative criteria for liquid marble formation via a preformed droplet template. In addition, new frameworks for the formation of liquid marbles via the mechanical dispersion regime and for the formation of hollow granules were also developed and validated. These frameworks give a better understanding of the mechanisms controlling the granulation of hydrophobic particles to form liquid marbles and provide guidance on how to mass produce liquid marbles and hollow granules.
Subject Chemical Engineering not elsewhere classified
Keyword(s) Dry water
Hollow granule
Hydrophobic granulation
Liquid marble
Non-wetting
DOI - identifier 10.1016/j.powtec.2011.05.007
Copyright notice © 2011 Elsevier B.V. All rights reserved
ISSN 0032-5910
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 0 times in Scopus Article
Altmetric details:
Access Statistics: 216 Abstract Views, 867 File Downloads  -  Detailed Statistics
Created: Fri, 06 Jan 2012, 08:39:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us