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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/198466
- Molecular filters based on cyclodextrin functionalized electrospun fibers
- Uyar, Tamer; Havelund, Rasmus; Nur, Yusuf; Hacaloglu, Jale; Besenbacher, Flemming; Kingshott, Peter
- Beta-cyclodextrin (β-CD) was successfully incorporated into polystyrene (PS) fibers by electrospinning technique. The subsequent fibrous membranes show potential for efficient removal of organic compound (e.g.: phenolphthalein) from solution by the formation of inclusion complexes with the β-CD molecules. Since the filtration efficiency of the fiber membranes is highly dependent on the presence and distribution of β-CD at the surface of the individual fibers, highly sensitive and specific surface spectroscopic analyses were carried out. X-ray photoelectron spectroscopy (XPS) was used to quantify the amount of β-CD on the surface of PS fibers. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) showed the presence of both β-CD molecular and fragment ions on the fiber surfaces, and high resolution chemical imaging demonstrated even distribution of β-CD on the surface of the individual fibers. Phenolphthalein (PhP) was used as a model compound in the filtration studies, and a strong dependence was observed between β-CD content of the PS/CD fibers and efficiency of trapping PhP. These results demonstrate the potential of using PS/CD fibrous membranes to filter organic molecules in purification/separation processes.
- Publication type
- Journal article
- Journal of Membrane Science, Vol. 332, no. 1-2 (Apr 2009), pp. 129-137
- Publication year
- FOR Code(s)
- 04 Earth Sciences; 09 Engineering; 05 Environmental Sciences
- Beta cyclodextrins; Chemical analysis; Chemical imaging; Cyclodextrin; Data storage equipment; Electrospinning; Electrospinning techniques; Electrospun fibers; Fiber membranes; Fiber surfaces; Fibers; Fibrous membranes; Filtration efficiencies; Fragment ions; Functionalised; High performance liquid chromatography; High resolutions; Highly sensitives; Inclusion complexes; Individual fibers; Mass spectrometry; Membrane filter; Microfiltration; Model compounds; Molecular filters; Molecular spectroscopy; Nanochemistry; Nanofibers; Nanofilter; Nanofiltration; Organic molecules; Phenolic resins; Phenolphthalein; Polystyrenes; Porous materials; Secondary ion mass spectrometry; Specific surfaces; Spectroscopic analysis; Spectrum analysis; Surface analysis; Time-of-flight secondary ion mass spectrometries; X-ray photoelectron spectroscopies
- Publisher URL
- Copyright © 2009 Elsevier B.V. All rights reserved.
- Peer reviewed