- Title
- Interaction of a particle bed with a droplet under an applied electric field
- Creator
- Ireland, P. M.; Webber, Grant B.; Jarrett, E. D.; Galvin, K. P.
- Relation
- Electrostatics 2015. Proceedings of Electrostatics 2015 [presented in Journal of Physics: Conference Series, Vol. 646] (Southhampton, UK 12-16 April, 2015)
- Publisher Link
- http://dx.doi.org/10.1088/1742-6596/646/1/012027
- Publisher
- Institute of Physics
- Resource Type
- conference paper
- Date
- 2015
- Description
- Transport of dry solid particles to a liquid is relevant to a number of emerging applications, including 'liquid marbles'. We report experiments where the transport of dry particles to a pendent water droplet is driven by an external electric field. Both hydrophilic and hydrophobic materials (silica, PMMA) were studied. For silica particles (hydrophilic, poorly conductive), a critical applied voltage initiated transfer, in the form of a rapid 'avalanche' of a large number of particles. The particle-loaded drop then detached, producing a metastable spherical agglomerate. Pure PMMA particles did not display this 'avalanche' behaviour, and when added to silica particles, appeared to cause aggregation and change the nature of the transfer mechanism. This paper is largely devoted to the avalanche process, in which deformation of the drop and radial compaction of the particle bed due to the electric field are thought to have played a central role. Since no direct contact is required between the bed and the drop, we hope to produce liquid marble-type aggregates with layered structures incorporating hydrophilic particles, which has not previously been possible.
- Subject
- particle bed; droplet; liquid marbles
- Identifier
- http://hdl.handle.net/1959.13/1327060
- Identifier
- uon:25562
- Identifier
- ISSN:1742-6596
- Rights
- Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
- Language
- eng
- Full Text
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