Molecular filters based on cyclodextrin functionalized electrospun fibers

Date

2009-04-15

Author

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

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Beta-cyclodextrin (beta-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 beta-CD molecules. Since the filtration efficiency of the fiber membranes is highly dependent on the presence and distribution of beta-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 beta-CD on the surface of PS fibers. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) showed the presence of both beta-CD molecular and fragment ions on the fiber surfaces, and high resolution chemical imaging demonstrated even distribution of beta-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 beta-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.

Subject Keywords

Cyclodextrin, Electrospinning, Nanofiber, Polystyrene, Nanofilter

URI

https://hdl.handle.net/11511/31399

Journal

Journal of Membrane Science

DOI

https://doi.org/10.1016/j.memsci.2009.01.047

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

T. Uyar, R. Havelund, Y. Nur, J. Hacaloğlu, F. Besenbacher, and P. Kingshott, “Molecular filters based on cyclodextrin functionalized electrospun fibers,” Journal of Membrane Science, pp. 129–137, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31399.