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Ahmad M, Ahmed M. Characterization and applications of ion-exchange membranes and selective ion transport through them: a review. J APPL ELECTROCHEM 2023. [DOI: 10.1007/s10800-023-01882-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
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2
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Tran ML, Fu CC, Wu MH, Juang RS. Experimental verification on real-time fouling analysis in crossflow UF of protein solutions by electrical impedance spectroscopy. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2021.104197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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3
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Tanudjaja HJ, Ng AQQ, Chew JW. Mechanistic insights into the membrane fouling mechanism during ultrafiltration of high-concentration proteins via in-situ electrical impedance spectroscopy (EIS). J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.11.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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4
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Xiao J, Sun Q, Liu L, Ding Z. Monitoring the spontaneous wetting process of hydrophobic microporous membrane assisted by alternating current impedance spectroscopy. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.08.055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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DuToit M, Ngaboyamahina E, Wiesner M. Pairing electrochemical impedance spectroscopy with conducting membranes for the in situ characterization of membrane fouling. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118680] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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6
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Tian J, Trinh TA, Kalyan MN, Ho JS, Chew JW. In-situ monitoring of oil emulsion fouling in ultrafiltration via electrical impedance spectroscopy (EIS): Influence of surfactant. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118527] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Jia H, Feng F, Wang J, Ngo HH, Guo W, Zhang H. On line monitoring local fouling behavior of membrane filtration process by in situ hydrodynamic and electrical measurements. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.117245] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Yushkin A, Vasilevsky V, Khotimskiy V, Szymczyk A, Volkov A. Evaluation of liquid transport properties of hydrophobic polymers of intrinsic microporosity by electrical resistance measurement. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.03.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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9
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Li L, Zhao R, Wang L, Wu S, Wang T. Correlation of surface concentration polarization with the surface electrochemistry of a permselective Membrane: An ex situ electrical impedance spectroscopy study. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2017.11.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Wagholikar V, Zhuang H, Jiao Y, Moe N, Ramanan H, Goh L, Barber J, Lee K, Lee H, Fuh J. Modeling cell pair resistance and spacer shadow factors in electro-separation processes. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.08.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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In-situ monitoring of biofouling on reverse osmosis membranes: Detection and mechanistic study using electrical impedance spectroscopy. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.06.043] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Alobeedallah H, Cornell B, Coster H. The Effect of Benzyl Alcohol on the Dielectric Structure of Lipid Bilayers. J Membr Biol 2016; 249:833-844. [PMID: 27803961 DOI: 10.1007/s00232-016-9934-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 10/22/2016] [Indexed: 11/25/2022]
Abstract
Molecularly tethered lipid bilayer membranes were constructed on a commercially available chemically modified gold substrate. This is a new and promising product that has allowed the construction of very robust lipid bilayers. Very high resolution electrical impedance spectroscopy (EIS) was used to determine the dielectric structure of the lipid bilayers and associated interfaces. The EIS data were modelled in terms of the dielectric substructure using purpose developed software. The hydrophobic region, where the lipid tails are located, was revealed by the EIS in the frequency range of (1-100) Hz and its thickness was calculated from the capacitance of this region and found to be approximately 3-4 nm. The hydrophilic region, where the polar heads are located, was revealed at higher frequencies and its thickness was estimated to be approximately 1-2 nm. The effect of the local anaesthetic benzyl alcohol (BZA) on the tethered lipid bilayers was investigated. The effect of BZA on the membrane capacitance and conductance allowed the changes in the thickness of the polar head and hydrophobic tails regions to be determined. It was found that the addition of BZA caused a significant increase in the capacitance (corresponding to a decrease in the thickness) of the hydrophobic region and an increase in the membrane electrical conductance. The EIS allowed a distinction between a hydrophobic region in the centre of the bilayer and an outer hydrophobic region. Benzyl alcohol was found to have the largest effect on the outer, hydrophobic region, although the inner hydrophobic region was also consistently affected.
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Affiliation(s)
- Hadeel Alobeedallah
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia.
| | - Bruce Cornell
- SDx Tethered Membranes Pty Ltd., Roseville, Sydney, NSW, 2069, Australia
| | - Hans Coster
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
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Electrochemical impedance spectroscopy study of membrane fouling characterization at a conductive sub-stoichiometric TiO2 reactive electrochemical membrane: Transmission line model development. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.03.032] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Bannwarth S, Trieu T, Oberschelp C, Wessling M. On-line monitoring of cake layer structure during fouling on porous membranes by in situ electrical impedance analysis. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.01.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Ho JS, Sim LN, Gu J, Webster RD, Fane AG, Coster HG. A threshold flux phenomenon for colloidal fouling in reverse osmosis characterized by transmembrane pressure and electrical impedance spectroscopy. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2015.11.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Cen J, Vukas M, Barton G, Kavanagh J, Coster H. Real time fouling monitoring with Electrical Impedance Spectroscopy. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.03.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Efligenir A, Fievet P, Déon S, Salut R. Characterization of the isolated active layer of a NF membrane by electrochemical impedance spectroscopy. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.12.044] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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Chilcott TC, Cen J, Kavanagh JM. In situ characterization of compaction, ionic barrier and hydrodynamics of polyamide reverse osmosis membranes using electrical impedance spectroscopy. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.12.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Bannwarth S, Darestani M, Coster H, Wessling M. Characterization of hollow fiber membranes by impedance spectroscopy. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.09.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Zhao K, Lu Q, Su W. Estimation of electrical parameters inside nanofiltration membranes in various electrolyte solutions by dielectric spectroscopy analysis. RSC Adv 2014. [DOI: 10.1039/c4ra13598a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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21
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Yeo SY, Wang Y, Chilcott T, Antony A, Coster H, Leslie G. Characterising nanostructure functionality of a cellulose triacetate forward osmosis membrane using electrical impedance spectroscopy. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.05.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Hu Z, Antony A, Leslie G, Le-Clech P. Real-time monitoring of scale formation in reverse osmosis using electrical impedance spectroscopy. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.11.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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23
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Seo SJ, Hinsch A, Veurman W, Brandt H, Kang MS, Shin SH, Moon SH. Analyses of structurally modified quasi-solid-state electrolytes using electrochemical impedance spectroscopy for dye-sensitized solar cells. J Appl Polym Sci 2014. [DOI: 10.1002/app.39739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Seok-Jun Seo
- Membrane and Electrochemistry Lab.; School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST); 123 Cheomdan-gwagiro, Buk-gu Gwangju 500-712 Republic of Korea
- Energy storage Lab., Research Institute for Solar and Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST); 123 Cheomdan-gwagiro, Buk-gu Gwangju 500-712 Republic of Korea
- Fraunhofer Institute for Solar Energy Systems (ISE); Heidenhofstrasse 2 Freiburg 79110 Germany
| | - Andreas Hinsch
- Fraunhofer Institute for Solar Energy Systems (ISE); Heidenhofstrasse 2 Freiburg 79110 Germany
| | - Welmoed Veurman
- Fraunhofer Institute for Solar Energy Systems (ISE); Heidenhofstrasse 2 Freiburg 79110 Germany
| | - Henning Brandt
- Fraunhofer Institute for Solar Energy Systems (ISE); Heidenhofstrasse 2 Freiburg 79110 Germany
| | - Moon-Sung Kang
- Department of Environmental Engineering; College of Engineering, Sangmyung University; Cheonan Chungnam Province 330-720 Republic of Korea
| | - Sung-Hee Shin
- Membrane and Electrochemistry Lab.; School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST); 123 Cheomdan-gwagiro, Buk-gu Gwangju 500-712 Republic of Korea
| | - Seung-Hyeon Moon
- Membrane and Electrochemistry Lab.; School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST); 123 Cheomdan-gwagiro, Buk-gu Gwangju 500-712 Republic of Korea
- Energy storage Lab., Research Institute for Solar and Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST); 123 Cheomdan-gwagiro, Buk-gu Gwangju 500-712 Republic of Korea
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24
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Darestani MT, Chilcott TC, Coster HGL. Electrical impedance spectroscopy study of piezoelectric PVDF membranes. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2286-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Sim L, Wang Z, Gu J, Coster H, Fane A. Detection of reverse osmosis membrane fouling with silica, bovine serum albumin and their mixture using in-situ electrical impedance spectroscopy. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.04.047] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Antony A, Chilcott T, Coster H, Leslie G. In situ structural and functional characterization of reverse osmosis membranes using electrical impedance spectroscopy. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2012.09.028] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Antony A, Low JH, Gray S, Childress AE, Le-Clech P, Leslie G. Scale formation and control in high pressure membrane water treatment systems: A review. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2011.08.054] [Citation(s) in RCA: 337] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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28
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Vitarelli MJ, Prakash S, Talaga DS. Determining nanocapillary geometry from electrochemical impedance spectroscopy using a variable topology network circuit model. Anal Chem 2010; 83:533-41. [PMID: 21188971 DOI: 10.1021/ac102236k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Solid-state nanopores and nanocapillaries find increasing use in a variety of applications including DNA sequencing, synthetic nanopores, next-generation membranes for water purification, and other nanofluidic structures. This paper develops the use of electrochemical impedance spectroscopy to determine the geometry of nanocapillaries. A network equivalent circuit element is derived to include the effects of the capacitive double layer inside the nanocapillaries as well as the influence of varying nanocapillary radius. This variable topology function is similar to the finite Warburg impedance in certain limits. Analytical expressions for several different nanocapillary shapes are derived. The functions are evaluated to determine how the impedance signals will change with different nanocapillary aspect ratios and different degrees of constriction or inflation at the capillary center. Next, the complex impedance spectrum of a nanocapillary array membrane is measured at varying concentrations of electrolyte to separate the effects of nanocapillary double layer capacitance from those of nanocapillary geometry. The variable topology equivalent circuit element model of the nanocapillary is used in an equivalent circuit model that included contributions from the membrane and the measurement apparatus. The resulting values are consistent with the manufacturer's specified tolerances of the nanocapillary geometry. It is demonstrated that electrochemical impedance spectroscopy can be used as a tool for in situ determination of the geometry of nanocapillaries.
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Affiliation(s)
- Michael J Vitarelli
- Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, New Jersey 08854, USA
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Lu Q, Zhao K. Dielectric spectroscopy of a nanofiltration membranes-electrolyte solution system: I. Low-frequency dielectric relaxation from the counterion polarization in pores and model development. J Phys Chem B 2010; 114:16783-91. [PMID: 21090732 DOI: 10.1021/jp110160z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dielectric spectra of nanofiltration membranes NF90, NF-, and NF270 in eight electrolytes, NaCl, KCl, CuCl(2), MgCl(2), Na(2)SO(4), K(2)SO(4), MgSO(4), and CuSO(4), were investigated as a function of the electrolyte concentration over a frequency range from 40 Hz to 11 MHz. Two relaxations were observed: the one at high frequency was caused by interfacial polarization between the membrane and electrolyte, and the low-frequency relaxation, on which we focus on in this work, was confirmed to be due to the counterion polarization effects in the pores of the membrane. A model of cylindrical pores which were dispersed in membrane base was developed to interpret the low-frequency relaxation. On the basis of this model, we amended the expression deduced by Takashima for describing the dielectric behavior of a cylinder particle suspension to fit our dielectric data from the low-frequency relaxation. The data fitting with this improved expression was suitable for all the systems measured in this work; structural and electrical parameters such as the radius of the pore in the membrane, the thickness of the active layer of the membrane, surface charged density, and zeta potential on the pore wall were obtained finally.
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Affiliation(s)
- Qing Lu
- College of Chemistry, Beijing Normal University, Beijing 100875
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30
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Wyart Y, Georges G, Deumié C, Amra C, Moulin P. Membrane characterization by optical methods: Ellipsometry of the scattered field. J Memb Sci 2008. [DOI: 10.1016/j.memsci.2008.02.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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31
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Prakash S, Yeom J, Jin N, Adesida I, Shannon MA. Characterization of ionic transport at the nanoscale. ACTA ACUST UNITED AC 2007. [DOI: 10.1243/17403499jnn91] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This paper reports on the development of a multi-layer microscale impedance measurement system with integrated working, counter, and reference electrodes that can be used to probe transport at the nanoscale. System fabrication and testing are carried out to demonstrate the feasibility of such a system for characterizing transport through nanocapillary array membranes (NCAMs). Results indicate that transport through NCAMs is a complex phenomenon, and impedance does not scale linearly with either pore diameter or ionic concentration. Use of a microscale construct for probing ionic transport at the nanoscale appears to be a promising path forward with further development.
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Affiliation(s)
- S Prakash
- Department of Mechanical Engineering Science, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Junghoon Yeom
- Department of Mechanical Engineering Science, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Niu Jin
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - I Adesida
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - M. A. Shannon
- Department of Mechanical Engineering Science, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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Nagarale RK, Gohil GS, Shahi VK. Recent developments on ion-exchange membranes and electro-membrane processes. Adv Colloid Interface Sci 2006; 119:97-130. [PMID: 16325751 DOI: 10.1016/j.cis.2005.09.005] [Citation(s) in RCA: 326] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Accepted: 09/05/2005] [Indexed: 10/25/2022]
Abstract
Rapid growth of chemical and biotechnology in diversified areas fuels the demand for the need of reliable green technologies for the down stream processes, which include separation, purification and isolation of the molecules. Ion-exchange membrane technologies are non-hazardous in nature and being widely used not only for separation and purification but their application also extended towards energy conversion devices, storage batteries and sensors etc. Now there is a quite demand for the ion-exchange membrane with better selectivities, less electrical resistance, high chemical, mechanical and thermal stability as well as good durability. A lot of work has been done for the development of these types of ion-exchange membranes during the past twenty-five years. Herein we have reviewed the preparation of various types of ion-exchange membranes, their characterization and applications for different electro-membrane processes. Primary attention has been given to the chemical route used for the membrane preparation. Several general reactions used for the preparation of ion-exchange membranes were described. Methodologies used for the characterization of these membranes and their applications were also reviewed for the benefit of readers, so that they can get all information about the ion-exchange membranes at one platform. Although there are large number of reports available regarding preparations and applications of ion-exchange membranes more emphasis were predicted for the usefulness of these membranes or processes for solving certain type of industrial or social problems. More efforts are needed to bring many products or processes to pilot scale and extent their applications.
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Affiliation(s)
- R K Nagarale
- Central Salt and Marine Chemicals Research Institute, Bhavnagar-364002, Gujarat, India
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Benavente J, Zhang X, Garcia Valls R. Modification of polysulfone membranes with polyethylene glycol and lignosulfate: electrical characterization by impedance spectroscopy measurements. J Colloid Interface Sci 2005; 285:273-80. [PMID: 15797423 DOI: 10.1016/j.jcis.2004.11.051] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2004] [Accepted: 11/15/2004] [Indexed: 10/25/2022]
Abstract
Two sets of composite membranes having an asymmetric sulfonated polysulfone membrane as support layer have been obtained and electrically characterized (membranes SPS-PEG and PA-LIGS). The skin layer of the membrane SPS-PEG contains different percentages of polyethylene glycol in the casting solution (5, 25, 40, and 60 wt%), while lignosulfonate was used for manufacturing PA-LIGS membranes (5, 10, 20, and 40 wt%). Membrane electrical characterization was done by means of impedance spectroscopy (IS) measurements, which were carried out with the membranes in contact with NaCl solutions at different concentrations (10(-3) < or = c(M) < or = 5x10(-2)). Electrical resistance and equivalent capacitance of the different membrane samples were determined from IS plots by using equivalent circuits as models. Results show a clear decrease in the membrane electrical resistance as a result of both polysulfone sulfonation and the increase of the concentration of modifying substances, although a kind of limit concentration was obtained for both polyethylene glycol and lignosulfonate (40 and 20%, respectively). Results also show a decrease of around 90% in electrical resistance due to polysulfone sulfonation, while the value of the dielectric constant (hydrated state) clearly increases.
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Affiliation(s)
- J Benavente
- Grupo de Caracterización Electrocinética de Membranas e Interfases, Departamento de Física Aplicada I, Facultad de Ciencias, Universidad de Málaga, E-29071 Málaga, Spain.
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Effects of silica sol on ion exchange membranes: Electrochemical characterization of anion exchange membranes in electrodialysis of silica sol containing-solutions. KOREAN J CHEM ENG 2003. [DOI: 10.1007/bf02697294] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Osaki T, Tanioka A. Dielectric Relaxation on the Intermediate Layer in a Bipolar Membrane under the Water Splitting Phenomenon. J Colloid Interface Sci 2002; 253:94-102. [PMID: 16290835 DOI: 10.1006/jcis.2002.8549] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2002] [Accepted: 06/14/2002] [Indexed: 11/22/2022]
Abstract
In this study, we investigated the impedance spectra of bipolar membranes. Under the application of a reverse-biased voltage, the spectra showed a double dielectric relaxation profile due to the heterogeneous structure and it was analyzed in accordance with the three-layered dielectric model. It is defined that one of the compositions of the heterogeneous structure is situated at the membrane interface region between the negatively and the positively charged membrane with a thickness of less than several micrometers, which has an extraordinarily large electric capacity with a magnitude of sub-microfarads. It is concluded that this layer is identified with the intermediate layer in which the water splitting phenomenon occurs on the bipolar membrane.
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Affiliation(s)
- Toshihisa Osaki
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama Meguro-ku, Tokyo 152-8552, Japan
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Cañas A, Benavente J. Electrochemical Characterization of an Asymmetric Nanofiltration Membrane with NaCl and KCl Solutions: Influence of Membrane Asymmetry on Transport Parameters. J Colloid Interface Sci 2002; 246:328-34. [PMID: 16290419 DOI: 10.1006/jcis.2001.8080] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2001] [Accepted: 10/30/2001] [Indexed: 11/22/2022]
Abstract
Electrochemical characterization of a nanofiltration asymmetric membrane was carried out by measuring membrane potential, salt diffusion, and electrical parameters (membrane electrical resistance and capacitance) with the membrane in contact with NaCl and KCl solutions at different concentrations (10(-3)< or =c(M)< or =5 x 10(-2)). From these experiments characteristic parameters such as the effective concentration of charge in the membrane, ionic transport numbers, and salt and ionic permeabilities across the membrane were determined. Membrane electrical resistance and capacitance were obtained from impedance spectroscopy (IS) measurements by using equivalent circuits as models. This technique allows the determination of the electrical contribution associated with each sublayer; then, assuming that the dense sublayer behaves as a plane capacitor, its thickness can be estimated from the capacitance value. The influence of membrane asymmetry on transport parameters have been studied by carrying out measurements for the two opposite external conditions. Results show that membrane asymmetry strongly affects membrane potential, which is attributed to the Donnan exclusion when the solutions in contact with the dense layer have concentrations lower than the membrane fixed charge (X(ef) approximately -0.004 M), but for the reversal experimental condition (high concentration in contact with the membrane dense sublayer) the membrane potential is practically similar to the solution diffusion potential. The comparison of results obtained for both electrolytes agrees with the higher conductivity of KCl solutions. On the other hand, the influence of diffusion layers at the membrane/solution interfaces in salt permeation was also studied by measuring salt diffusion at a given NaCl concentration gradient but at five different solutions stirring rates.
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Affiliation(s)
- A Cañas
- Grupo de Caracterización Electrocinética y de Transporte en Membranas e Interfases, Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Málaga, E-29071 Málaga, Spain
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Chilcott T, Chan M, Gaedt L, Nantawisarakul T, Fane A, Coster H. Electrical impedance spectroscopy characterisation of conducting membranes. J Memb Sci 2002. [DOI: 10.1016/s0376-7388(01)00541-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Cañas A, Ariza M, Benavente J. Characterization of active and porous sublayers of a composite reverse osmosis membrane by impedance spectroscopy, streaming and membrane potentials, salt diffusion and X-ray photoelectron spectroscopy measurements. J Memb Sci 2001. [DOI: 10.1016/s0376-7388(00)00583-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Cañas A, Benavente J. Electrochemical and structural characterizations of an experimental track-etched membrane in KCl solutions. Sep Purif Technol 2000. [DOI: 10.1016/s1383-5866(00)00109-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ariza MJ, Ca�as A, Benavente J. Electrical and surface chemical characterizations of the active layer of composite polyamide/polysulphone nanofiltration commercial membranes. SURF INTERFACE ANAL 2000. [DOI: 10.1002/1096-9918(200008)30:1<425::aid-sia772>3.0.co;2-c] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Oleinikova M, Muñoz M, Benavente J, Valiente M. Determination of structural and electrical parameters for activated composite membranes containing di-(2-ethylhexyl)dithiophosphoric acid as carrier. Anal Chim Acta 2000. [DOI: 10.1016/s0003-2670(99)00633-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yamaguchi T, Kurita H, Nakao SI. Transport Mechanism of Aromatic Vapor through Silver Salt Carrier/Polymer Blend Membrane and Its Humidity Effect. J Phys Chem B 1999. [DOI: 10.1021/jp9835667] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takeo Yamaguchi
- The University of Tokyo, Department of Chemical System Engineering, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 Japan
| | - Hayato Kurita
- The University of Tokyo, Department of Chemical System Engineering, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 Japan
| | - Shin-ichi Nakao
- The University of Tokyo, Department of Chemical System Engineering, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 Japan
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Fievet P, Mullet M, Pagetti J. Impedance measurements for determination of pore texture of a carbon membrane. J Memb Sci 1998. [DOI: 10.1016/s0376-7388(98)00186-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Smith J, Simons R, Weidenhaun J. The low frequency conductance of bipolar membranes demonstrates the presence of a depletion layer. J Memb Sci 1998. [DOI: 10.1016/s0376-7388(97)00327-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Coster HG, Chilcott TC, Coster AC. Impedance spectroscopy of interfaces, membranes and ultrastructures. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/0302-4598(96)05064-7] [Citation(s) in RCA: 161] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zha F, Coster H, Fane A. A study of stability of supported liquid membranes by impedance spectroscopy. J Memb Sci 1994. [DOI: 10.1016/0376-7388(94)00093-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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