Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/198466

Title

Molecular filters based on cyclodextrin functionalized electrospun fibers

Author(s)

Uyar, Tamer;  Havelund, Rasmus;  Nur, Yusuf;  Hacaloglu, Jale;  Besenbacher, Flemming;  Kingshott, Peter

Abstract

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

Source

Journal of Membrane Science, Vol. 332, no. 1-2 (Apr 2009), pp. 129-137

Publication year

2009

FOR Code(s)

04 Earth Sciences;  09 Engineering;  05 Environmental Sciences

Keyword(s)

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

Elsevier

ISSN

0376-7388

Publisher URL

http://dx.doi.org/10.1016/j.memsci.2009.01.047

Copyright

Copyright © 2009 Elsevier B.V. All rights reserved.

Peer reviewed