Electric field assisted transport of dielectric droplets dispersed in aqueous solutions of ionic surfactants
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F18%3A43915897" target="_blank" >RIV/60461373:22340/18:43915897 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/elps.201800176" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/elps.201800176</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/elps.201800176" target="_blank" >10.1002/elps.201800176</a>
Alternative languages
Result language
angličtina
Original language name
Electric field assisted transport of dielectric droplets dispersed in aqueous solutions of ionic surfactants
Original language description
Motion of liquid droplets with a surface electric charge can be efficiently controlled by dc electric field. Here, we show that the surface of a dielectric kerosene droplet can be charged by the addition of ionic surfactants to a surrounding aqueous electrolyte. The direction of droplet motion is determined by the polarity of the surfactant charge and the orientation of the imposed electric field. We have found that the effective electrophoretic mobility of dielectric droplets in a confined channel is directly proportional to the logarithm of the surfactant concentration even for values significantly exceeding critical micelle concentration (CMC). We attribute this finding not only to adsorption of ionic surfactants to the surface of dielectric droplets but also to the weakening of electro-osmosis at channel walls due to the increase of ionic strength in the aqueous phase. Our findings can be exploited in microfluidic reactors and separators for on request dosing, sampling, and separation of dielectric fluids.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20402 - Chemical process engineering
Result continuities
Project
<a href="/en/project/GA17-09914S" target="_blank" >GA17-09914S: Reaction-transport fundamentals in integrated microfluidic bioreactors-separators operating with aqueous two-phase systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Electrophoresis
ISSN
0173-0835
e-ISSN
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Volume of the periodical
39
Issue of the periodical within the volume
23
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
2997-3005
UT code for WoS article
000451894000007
EID of the result in the Scopus database
2-s2.0-85053453057