Drying of PAAm hydrogels at various temperatures: A fluorescence study

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dc.authorid0000-0003-2352-9129
dc.authorid0000-0003-2210-5842
dc.authorid0000-0002-0082-8209
dc.contributor.authorAktaş, Demet Kayaen_US
dc.contributor.authorEvingür, Gülşen Akınen_US
dc.contributor.authorPekcan, Mehmet Önderen_US
dc.date.accessioned2015-01-15T23:00:50Z
dc.date.available2015-01-15T23:00:50Z
dc.date.issued2007-05
dc.departmentIşık Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.departmentIşık University, Faculty of Arts and Sciences, Department of Physicsen_US
dc.description.abstractThe steady-state fluorescence (SSF) technique was employed for studying the drying of polyacrylamide (PAAm) hydrogels. Disc-shaped hydrogels were prepared by free-radical crosslinking copolymerization of acrylamide (AAm) with N,N'-methylene bisacrylamide (BIS) as crosslinker in the presence of ammonium persulfate (APS) as an initiator. Pyranine (P) was introduced as a fluorescence probe and the intensity of pyranine was monitored during in situ drying at various temperatures. It was observed that the fluorescence intensity of pyranine increased during the drying process. A supporting, gravimetrical experiment was also performed. A phenomenological equation was introduced to determine the desorption coefficient, D, of water molecules from the drying hydrogels at various temperatures. The desorption activation energy, triangle E-d, values were measured for the drying processes and found to be 91.08 and 36.82 kJ mol(-1) by fluorescence and gravimetrical methods, respectively. This difference most probably originates from the origin of the techniques; the fluorescence technique measures the parameters at a molecular level, whereas the gravimetrical technique measures a parameter in the bulk.en_US
dc.description.versionPublisher' Versionen_US
dc.identifier.citationAktaş, D., Pekcan, M. Ö. & Evingür, G. (2007). Drying of PAAm hydrogels at various temperatures: A fluorescence study. Journal of Macromolecular Science, Part B, 46(3), 581-590. doi:10.1080/00222340701257950en_US
dc.identifier.doi10.1080/00222340701257950
dc.identifier.endpage590
dc.identifier.issn0022-2348
dc.identifier.issn1525-609X
dc.identifier.issue3
dc.identifier.scopus2-s2.0-34247332277
dc.identifier.scopusqualityQ3
dc.identifier.startpage581
dc.identifier.urihttps://hdl.handle.net/11729/272
dc.identifier.urihttp://dx.doi.org/10.1080/00222340701257950
dc.identifier.volume46
dc.identifier.wosWOS:000246476700013
dc.identifier.wosqualityQ4
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.publisherTaylor & Francis Groupen_US
dc.relation.ispartofJournal of Macromolecular Science, Part B: Physicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectActivation energyen_US
dc.subjectDryingen_US
dc.subjectFluorescenceen_US
dc.subjectHydrogelsen_US
dc.subjectFast transient fluorescenceen_US
dc.subjectGelsen_US
dc.subjectHeterogelsen_US
dc.subjectDiffusionen_US
dc.subjectBehavioren_US
dc.subjectCrosslinkingen_US
dc.subjectDesorptionen_US
dc.subjectFree radicalsen_US
dc.subjectAmmonium persulfate (APS)en_US
dc.subjectPyranineen_US
dc.subjectSteady-state fluorescence (SSF)en_US
dc.titleDrying of PAAm hydrogels at various temperatures: A fluorescence studyen_US
dc.typeArticleen_US
dspace.entity.typePublication

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