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Adsorption and dielectric properties of poly(1-vinylimidazole) on sepiolite

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dc.contributor.authorESMER, KADİR
dc.contributor.authorsTekin, Nalan; Kaya, A. Ugur; Esmer, Kadir; Kara, Ali
dc.date.accessioned2022-03-12T18:06:31Z
dc.date.available2022-03-12T18:06:31Z
dc.date.issued2012
dc.description.abstractThe adsorption of poly(1-vinylimidazole) (PVI) onto sepiolite from aqueous solutions was investigated as a function of some parameters such as pH, ionic strength, and temperature. The adsorption of PVI was increased with increasing pH and with decreasing ionic strength and temperature. The Langmuir isotherm model fitted the isotherm data better than the Freundlich model. The electrophorotic mobility of sepiolite dispersions was measured at different PVI concentrations and pH. The thermodynamic parameters Gibbs free energy, enthalpy, and entropy were evaluated. The dimensionless separation factor (R-L.) revealed that sepiolite can be used for adsorption of PVI from aqueous solutions. The second-order kinetics equation best fitted the experimental data. Dielectric properties of sepiolite coated with PVI have been also investigated. The sample with adsorbed PVI at 25 degrees C has the maximum the AC conductivity and the charge carriers can move easily in comparison with other samples. The real permittivities of the PVI-adsorbed samples are quite high in comparison with those of the pure polymer as a result of interface interactions. (C) 2011 Elsevier B.V. All rights reserved.
dc.identifier.doi10.1016/j.clay.2011.12.007
dc.identifier.issn0169-1317
dc.identifier.urihttps://hdl.handle.net/11424/230917
dc.identifier.wosWOS:000301689300005
dc.language.isoeng
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofAPPLIED CLAY SCIENCE
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAdsorption poly(1 vinylimidazole)
dc.subjectSepiolite
dc.subjectElectrical conductivity, dielectric properties
dc.subjectAQUEOUS-SOLUTION
dc.subjectDYE
dc.subjectKINETICS
dc.subjectSURFACES
dc.subjectBEHAVIOR
dc.subjectSILICA
dc.subjectPOLYVINYLIMIDAZOLE
dc.subjectSORPTION
dc.subjectREMOVAL
dc.subjectMODEL
dc.titleAdsorption and dielectric properties of poly(1-vinylimidazole) on sepiolite
dc.typearticle
dspace.entity.typePublication
local.avesis.iddb8d1591-f9e9-40c9-af7b-9498d99cb9b7
local.import.packageSS17
local.indexed.atWOS
local.indexed.atSCOPUS
local.journal.numberofpages7
oaire.citation.endPage38
oaire.citation.startPage32
oaire.citation.titleAPPLIED CLAY SCIENCE
oaire.citation.volume57
relation.isAuthorOfPublicationd99fd053-3197-4952-a179-27dfb16cbe0d
relation.isAuthorOfPublication.latestForDiscoveryd99fd053-3197-4952-a179-27dfb16cbe0d

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