Superhydrophobic hexamethylene diisocyanate modified hydrolyzed polymers of ıntrinsic microporosity electrospun ultrafine fibrous membrane for the adsorption of organic compounds and oil/water separation

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buir.contributor.authorSatılmış, Bekir
buir.contributor.authorUyar, Tamer
buir.contributor.orcidUyar, Tamer|0000-0002-3989-4481
dc.citation.epage1640en_US
dc.citation.issueNumber4en_US
dc.citation.spage1631en_US
dc.citation.volumeNumber1en_US
dc.contributor.authorSatılmış, Bekiren_US
dc.contributor.authorUyar, Tameren_US
dc.date.accessioned2019-02-23T15:23:15Z
dc.date.available2019-02-23T15:23:15Z
dc.date.issued2018en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractPolymers of intrinsic microporosity (PIMs) have gained significant research interest because of their successful applications in adsorption and separation. PIM-1 is the first and most studied member of this class because it shows specific interactions with some certain organic species. Chemical modification of PIM-1, which can be achieved by simply hydrolyzing the nitrile groups in the backbone, provides an advantage of tailoring its adsorption and separation performances. In this study, electrospinning of ultrafine fibers from hydrolyzed polymer of intrinsic microporosity (HPIM) and blends of hexamethylene diisocyanate (HMDI)/HPIM was achieved in several different ratios of HMDI/HPIM ranging from 1:9 to 1:1 (w/w). Bead-free and uniform fibers were obtained in the form of self-standing ultrafine fibrous membranes, which were then thermally treated at 150 °C to introduce chemical cross-linking between HMDI units and carbonyl groups of HPIM, resulting in HMDI-modified HPIM fibrous membranes (HMDI/HPIM-FMs). The solubility behavior has been altered by an introduced modification that makes membranes insoluble in all common organic solvents. Chemical cross-linking has been confirmed by using a Fourier transform infrared technique showing urethane linkage between HMDI and HPIM, and it was further supported by X-ray photoelectron microscopy and elemental analysis techniques that show a significant increase in the relative ratio of nitrogen in HMDI/HPIM-FMs compared to HPIM-FM. The average fiber diameters of fibrous membranes were found between 1.38 ± 0.29 and 0.96 ± 0.22 μm depending on the blend compositions and applied electrospinning parameters. Moreover, the water contact-angle value for HPIM-FM increased with the introduced HMDI modification from 140 ± 4° to 159 ± 7°, changing the nature of the membrane from hydrophobic to superhydrophobic. Consequently, HMDI/HPIM-FMs were successfully employed in oil/water separation due to the superhydrophobicity. In addition, the adsorption properties of HPIMFM and HMDI/HPIM-FMs were explored for common organic solvents. While both HPIM-FM and HMDI/HPIM-FMs show promising results, the structural stability of HMDI/HPIM-FMs in liquids was found to be more stable and reusable with respect to HPIM-FM. Hence, HMDI/HPIM-FMs are more favorable for organic adsorption and separation purposes from an aqueous system.en_US
dc.identifier.doi10.1021/acsanm.8b00115en_US
dc.identifier.eissn2574-0970
dc.identifier.urihttp://hdl.handle.net/11693/50571
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttps://doi.org/10.1021/acsanm.8b00115en_US
dc.source.titleACS Applied Nano Materialsen_US
dc.subjectElectrospinningen_US
dc.subjectOil/water separationen_US
dc.subjectOrganic removalen_US
dc.subjectPolymers of intrinsic microporosity (PIM-1)en_US
dc.subjectSuperhydrophobicen_US
dc.titleSuperhydrophobic hexamethylene diisocyanate modified hydrolyzed polymers of ıntrinsic microporosity electrospun ultrafine fibrous membrane for the adsorption of organic compounds and oil/water separationen_US
dc.typeArticleen_US
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