Dielectric behavior of oil–water emulsions during phase separation probed by electrical impedance spectroscopy
Electrical impedance spectroscopy (EIS) is applied to studying the stability and phase behavior of oil–water emulsions. The method involves EIS on 500-μm-thick samples of emulsions in a parallel-plate capacitor test cell. The frequency response data is fitted to an equivalent circuit model to estima...
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| Veröffentlicht in: | Sensors and actuators. B, Chemical Chemical, 2017-05, Vol.243, p.460-464 |
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| container_title | Sensors and actuators. B, Chemical |
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| creator | Shahidi, Seyedehsan (Ehsan) Koch, Charles R. Bhattacharjee, Subir Sadrzadeh, Mohtada |
| description | Electrical impedance spectroscopy (EIS) is applied to studying the stability and phase behavior of oil–water emulsions. The method involves EIS on 500-μm-thick samples of emulsions in a parallel-plate capacitor test cell. The frequency response data is fitted to an equivalent circuit model to estimate the electrical impedance of the samples. The technique is used for investigating the capacitance and resistance of emulsions during phase separation. A theoretical explanation based on the capacitance of the emulsion layer is provided to understand the reason behind the variation in the dielectric constant of the samples during phase separation. It is observed that creaming and sedimentation can be captured as a permittivity decay, so permittivity measurements can be utilized to sense phase separation. The technique is shown to be more effective for oil-in-water emulsions rather than water-in-oil ones. |
| doi_str_mv | 10.1016/j.snb.2016.11.072 |
| format | Article |
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The method involves EIS on 500-μm-thick samples of emulsions in a parallel-plate capacitor test cell. The frequency response data is fitted to an equivalent circuit model to estimate the electrical impedance of the samples. The technique is used for investigating the capacitance and resistance of emulsions during phase separation. A theoretical explanation based on the capacitance of the emulsion layer is provided to understand the reason behind the variation in the dielectric constant of the samples during phase separation. It is observed that creaming and sedimentation can be captured as a permittivity decay, so permittivity measurements can be utilized to sense phase separation. 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The technique is shown to be more effective for oil-in-water emulsions rather than water-in-oil ones.</description><subject>Capacitance</subject><subject>Cosmetics</subject><subject>Electrical impedance</subject><subject>Electrical impedance spectroscopy</subject><subject>Emulsion</subject><subject>Emulsions</subject><subject>Equivalent circuit</subject><subject>Equivalent circuits</subject><subject>Frequency response</subject><subject>Impedance spectroscopy</subject><subject>Liquid system sensing</subject><subject>Microemulsions</subject><subject>Milli-fluidic</subject><subject>Permittivity</subject><subject>Phase separation</subject><subject>Phase separation monitoring</subject><subject>Phase transitions</subject><subject>Sedimentation</subject><subject>Sedimentation & deposition</subject><issn>0925-4005</issn><issn>1873-3077</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9UMtOwzAQtBBIlMIHcLPEOcGOEzsRJ1SeEhIXOFuOs6au0tjYSVFv_AN_yJfgqnDltKvdmd2ZQeickpwSyi9XeRzavEhtTmlORHGAZrQWLGNEiEM0I01RZSUh1TE6iXFFCCkZJzPkbyz0oMdgNW5hqTbWBewMdrb__vz6UCMEDOupj9YNEXdTsMMb9ksVAUfwKqgxLbAProUOt1v8d0z12K49dGrQCel3Qxe189tTdGRUH-Hst87R693ty-Ihe3q-f1xcP2WaNXTMlALFKjB1xVtRGc6bhpq2LBmYtuKEMt0wKoRpCtWKWnFRGKAMSlIWXBdGszm62N9N2t4niKNcuSkM6aUsSFOLuqwZSSi6R-kkLwYw0ge7VmErKZG7YOVKpmDlLlhJqUzBJs7VngNJ_sZCkFFbSD47G5JP2Tn7D_sH6VqEBg</recordid><startdate>20170501</startdate><enddate>20170501</enddate><creator>Shahidi, Seyedehsan (Ehsan)</creator><creator>Koch, Charles R.</creator><creator>Bhattacharjee, Subir</creator><creator>Sadrzadeh, Mohtada</creator><general>Elsevier B.V</general><general>Elsevier Science Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7SR</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20170501</creationdate><title>Dielectric behavior of oil–water emulsions during phase separation probed by electrical impedance spectroscopy</title><author>Shahidi, Seyedehsan (Ehsan) ; Koch, Charles R. ; Bhattacharjee, Subir ; Sadrzadeh, Mohtada</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c391t-aaea35ef856b75f66991fb443efb56013c93177f92ab78a672fe13e40426c2fc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Capacitance</topic><topic>Cosmetics</topic><topic>Electrical impedance</topic><topic>Electrical impedance spectroscopy</topic><topic>Emulsion</topic><topic>Emulsions</topic><topic>Equivalent circuit</topic><topic>Equivalent circuits</topic><topic>Frequency response</topic><topic>Impedance spectroscopy</topic><topic>Liquid system sensing</topic><topic>Microemulsions</topic><topic>Milli-fluidic</topic><topic>Permittivity</topic><topic>Phase separation</topic><topic>Phase separation monitoring</topic><topic>Phase transitions</topic><topic>Sedimentation</topic><topic>Sedimentation & deposition</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shahidi, Seyedehsan (Ehsan)</creatorcontrib><creatorcontrib>Koch, Charles R.</creatorcontrib><creatorcontrib>Bhattacharjee, Subir</creatorcontrib><creatorcontrib>Sadrzadeh, Mohtada</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Sensors and actuators. 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| source | Elsevier ScienceDirect Journals |
| subjects | Capacitance Cosmetics Electrical impedance Electrical impedance spectroscopy Emulsion Emulsions Equivalent circuit Equivalent circuits Frequency response Impedance spectroscopy Liquid system sensing Microemulsions Milli-fluidic Permittivity Phase separation Phase separation monitoring Phase transitions Sedimentation Sedimentation & deposition |
| title | Dielectric behavior of oil–water emulsions during phase separation probed by electrical impedance spectroscopy |
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