Study on swelling of hydrogels (PAAm) at various temperatures by using fluorescence technique

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dc.authorid0000-0003-2352-9129
dc.authorid0000-0003-2210-5842
dc.authorid0000-0002-0082-8209
dc.contributor.authorKaya Aktaş, Demeten_US
dc.contributor.authorAkın Evingür, Gülşenen_US
dc.contributor.authorPekcan, Mehmet Önderen_US
dc.date.accessioned2015-01-15T23:00:48Z
dc.date.available2015-01-15T23:00:48Z
dc.date.issued2007-10
dc.departmentIşık Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.departmentIşık University, Faculty of Arts and Sciences, Department of Physicsen_US
dc.description.abstractSteady-state fluorescence (SSF) technique was employed for studying swelling of polyacrylamide (PAAm) hydrogels. Disc-shaped gels were prepared by free-radical crosslinking copolymerization of acrylamide (AAm) with N, N'- methylenebis (acrylamide) (BIS) as crosslinker in the presence of ammonium persulfate (APS) as an initiator. Pyranine was introduced as a fluorescence probe. Fluorescence intensity of pyranine was measured during in situ swelling process at various temperatures and it was observed that fluorescence intensity values decreased as swelling is proceeded. Li-Tanaka equation was used to determine the swelling time constants, tau(c) and cooperative diffusion coefficients, D-c from intensity, weight and volume variations during the swelling processes. It is observed that swelling time constants, tau(c) decreased and diffusion coefficients, D-c increased as the swelling temperature is increased. The swelling activation energies, Delta E were measured from the intensity, weight and volume variations and found to be 10.7, 32.2 and 64.1 kJ mol(-1), respectively.en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationKaya Aktaş, D., Akın Evingür, G. & Pekcan, M. Ö. (2007). Study on swelling of hydrogels (PAAm) at various temperatures by using fluorescence technique. Journal of Materials Science, 42(20), 8481-8488. doi:10.1007/s10853-007-1764-xen_US
dc.identifier.doi10.1007/s10853-007-1764-x
dc.identifier.endpage8488
dc.identifier.issn0022-2461
dc.identifier.issn1573-4803
dc.identifier.issue20
dc.identifier.scopus2-s2.0-34547795813
dc.identifier.scopusqualityQ1
dc.identifier.startpage8481
dc.identifier.urihttps://hdl.handle.net/11729/241
dc.identifier.urihttp://dx.doi.org/10.1007/s10853-007-1764-x
dc.identifier.volume42
dc.identifier.wosWOS:000248764500015
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakScience Citation Index Expanded (SCI-EXPANDED)en_US
dc.institutionauthorPekcan, Mehmet Önderen_US
dc.institutionauthorid0000-0002-0082-8209
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherSpringer USen_US
dc.relation.ispartofJournal of Materials Scienceen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectPoly(methyl methacrylate) gelsen_US
dc.subjectPhase-transitionsen_US
dc.subjectKineticsen_US
dc.subjectShrinkingen_US
dc.subjectGelsen_US
dc.subjectHydrogelsen_US
dc.subjectPolyacrylatesen_US
dc.subjectPhase transitionen_US
dc.subjectActivation energyen_US
dc.subjectCopolymerizationen_US
dc.subjectDiffusionen_US
dc.subjectFluorescenceen_US
dc.subjectFree radicalsen_US
dc.subjectPyreneen_US
dc.subjectSwellingen_US
dc.subjectSwelling processen_US
dc.subjectSwelling temperatureen_US
dc.subjectTanaka equationen_US
dc.titleStudy on swelling of hydrogels (PAAm) at various temperatures by using fluorescence techniqueen_US
dc.typeArticleen_US
dspace.entity.typePublication

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