Crosslinked PolyCyclodextrin/PolyBenzoxazine electrospun microfibers for selective removal of methylene blue from an aqueous system

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buir.contributor.authorDoğan, Yelda Ertaş
buir.contributor.authorSatılmış, Bekir
buir.contributor.authorUyar, Tamer
buir.contributor.orcidUyar, Tamer|0000-0002-3989-4481
dc.citation.epage321en_US
dc.citation.spage311en_US
dc.citation.volumeNumber119en_US
dc.contributor.authorDoğan, Yelda Ertaşen_US
dc.contributor.authorSatılmış, Bekiren_US
dc.contributor.authorUyar, Tameren_US
dc.date.accessioned2020-01-31T18:38:20Z
dc.date.available2020-01-31T18:38:20Z
dc.date.issued2019
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractIn this study, a blend solution of hydroxypropyl-β-cyclodextrin (HPβCD) and benzoxazine monomer (BA-a) was prepared in dimethylformamide to obtain HPβCD/BA-a microfibers by electrospinning technique. The electrospun HPβCD/BA-a microfibers were then thermally cured to obtain crosslinked PolyHPβCD/PolyBA-a microfibers. The compositions of HPβCD (120%, w/v) and BA-a (25%, w/v) were determined as an optimum concentration for producing bead-free and uniform microfibers from blend of HPβCD and BA-a (HPβCD/BA-a). Afterwards, the HPβCD/BA-a microfibers were thermally cured using step-wise curing method to obtain water-insoluble crosslinked PolyHPβCD/PolyBA-a fibrous membrane (FM). However, the fibrous structure of PolyHPβCD/PolyBA-a membrane was subjected to some morphological deformation during thermal curing. Therefore, citric acid (CTR, 5% and 15%, w/v) was incorporated into blend of HPβCD15/BA-a and it was named as HPβCDx/BA-a where x represents the amount of CTR (w/v) in the system. Blend solution of HPβCD15/BA-a was electrospun into microfibers to facilitate the crosslinking and to improve thermal resistance of the crosslinked fibrous membrane (PolyHPβCD15/PolyBA-a). Structural changes and thermal properties of the microfibers before and after curing were studied. Scanning electron microscopy was further used to monitor the morphology and stability of crosslinked PolyHPβCD/PolyBA-a microfibers in water and organic solvents. Consequently, PolyHPβCD15/PolyBA-a microfibers showed an enhanced structural stability in water and organic solvents along with thermal resistance, indicating successful crosslinking. Afterwards, the molecular separation ability of self-standing PolyHPβCD15/PolyBA-a FM was evaluated using dye mixture of Methylene Blue (MB) and Methyl Orange (MO). While both dye molecules are able to form a host-guest interaction between cyclodextrin molecules, crosslinked PolyHPβCD15/PolyBA-a FM showed sorption selectivity against cationic MB dye due to favorable electrostatic attractions between MB and HPβCD compared to anionic MO dye and HPβCD. In addition to selective sorption behavior of MB dye over MO dye, crosslinked PolyHPβCD15/PolyBA-a FM exhibited a decent adsorption capacity for MB in water.en_US
dc.description.provenanceSubmitted by Onur Emek (onur.emek@bilkent.edu.tr) on 2020-01-31T18:38:20Z No. of bitstreams: 1 Bilkent-research-paper.pdf: 268963 bytes, checksum: ad2e3a30c8172b573b9662390ed2d3cf (MD5)en
dc.description.provenanceMade available in DSpace on 2020-01-31T18:38:20Z (GMT). No. of bitstreams: 1 Bilkent-research-paper.pdf: 268963 bytes, checksum: ad2e3a30c8172b573b9662390ed2d3cf (MD5) Previous issue date: 2019en
dc.embargo.release2021-03-01
dc.identifier.doi10.1016/j.eurpolymj.2019.08.005en_US
dc.identifier.issn0014-3057
dc.identifier.urihttp://hdl.handle.net/11693/52968
dc.language.isoEnglishen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttps://dx.doi.org/10.1016/j.eurpolymj.2019.08.005en_US
dc.source.titleEuropean Polymer Journalen_US
dc.subjectCyclodextrinen_US
dc.subjectPolybenzoxazineen_US
dc.subjectElectrospinningen_US
dc.subjectMicrofibersen_US
dc.subjectWater treatmenten_US
dc.subjectSelective dye removalen_US
dc.titleCrosslinked PolyCyclodextrin/PolyBenzoxazine electrospun microfibers for selective removal of methylene blue from an aqueous systemen_US
dc.typeArticleen_US

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