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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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

  • 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