File Download
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1039/c5lc00177c
- Scopus: eid_2-s2.0-84928923158
- WOS: WOS:000353219800008
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Droplet-based electro-coalescence for probing threshold disjoining pressure
Title | Droplet-based electro-coalescence for probing threshold disjoining pressure |
---|---|
Authors | |
Issue Date | 2015 |
Publisher | Royal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/loc |
Citation | Lab on a Chip, 2015, v. 15 n. 9, p. 2018-2024 How to Cite? |
Abstract | In this work, we investigate the coalescence of emulsion droplets in a controlled electric field. Two contacting droplets stabilized by surfactants can be forced to coalesce into a combined one when the applied voltage is above a critical value. The critical voltages change with the types, concentrations of surfactants and temperature. By exploring the drainage of a thin oil film trapped between emulsions, we interpret that the coalescence occurs as the electric compression overcomes the disjoining pressure barrier and squeezes the film to a critical thickness. Based on this, we have devised an approach to probe the threshold disjoining pressure which can help predict the emulsion stability and surfactant efficacy quantitatively. We have confirmed the validity of our approach for measuring the threshold disjoining pressure by comparing the result with other proven tests that involve centrifugation and thermal heating. Our approach is simple, reliable and robust in predicting emulsion stability and will facilitate the design of emulsion-based formulations by accelerating the testing of emulsion stability. |
Persistent Identifier | http://hdl.handle.net/10722/216946 |
ISSN | 2023 Impact Factor: 6.1 2023 SCImago Journal Rankings: 1.246 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Liu, Z | - |
dc.contributor.author | Chan, ST | - |
dc.contributor.author | Faizi, HA | - |
dc.contributor.author | Roberts, RC | - |
dc.contributor.author | Shum, HC | - |
dc.date.accessioned | 2015-09-18T05:43:46Z | - |
dc.date.available | 2015-09-18T05:43:46Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Lab on a Chip, 2015, v. 15 n. 9, p. 2018-2024 | - |
dc.identifier.issn | 1473-0197 | - |
dc.identifier.uri | http://hdl.handle.net/10722/216946 | - |
dc.description.abstract | In this work, we investigate the coalescence of emulsion droplets in a controlled electric field. Two contacting droplets stabilized by surfactants can be forced to coalesce into a combined one when the applied voltage is above a critical value. The critical voltages change with the types, concentrations of surfactants and temperature. By exploring the drainage of a thin oil film trapped between emulsions, we interpret that the coalescence occurs as the electric compression overcomes the disjoining pressure barrier and squeezes the film to a critical thickness. Based on this, we have devised an approach to probe the threshold disjoining pressure which can help predict the emulsion stability and surfactant efficacy quantitatively. We have confirmed the validity of our approach for measuring the threshold disjoining pressure by comparing the result with other proven tests that involve centrifugation and thermal heating. Our approach is simple, reliable and robust in predicting emulsion stability and will facilitate the design of emulsion-based formulations by accelerating the testing of emulsion stability. | - |
dc.language | eng | - |
dc.publisher | Royal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/loc | - |
dc.relation.ispartof | Lab on a Chip | - |
dc.title | Droplet-based electro-coalescence for probing threshold disjoining pressure | - |
dc.type | Article | - |
dc.identifier.email | Chan, ST: santo719@hku.hk | - |
dc.identifier.email | Roberts, RC: rcr8@hku.hk | - |
dc.identifier.email | Shum, HC: ashum@hku.hk | - |
dc.identifier.authority | Roberts, RC=rp01738 | - |
dc.identifier.authority | Shum, HC=rp01439 | - |
dc.description.nature | postprint | - |
dc.identifier.doi | 10.1039/c5lc00177c | - |
dc.identifier.scopus | eid_2-s2.0-84928923158 | - |
dc.identifier.hkuros | 250687 | - |
dc.identifier.volume | 15 | - |
dc.identifier.issue | 9 | - |
dc.identifier.spage | 2018 | - |
dc.identifier.epage | 2024 | - |
dc.identifier.isi | WOS:000353219800008 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 1473-0189 | - |