Molecular filters based on cyclodextrin functionalized electrospun fibers


Uyar T., Havelund R., Nur Y., Hacaloglu J., Besenbacher F., Kingshott P.

JOURNAL OF MEMBRANE SCIENCE, no.1-2, pp.129-137, 2009 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Publication Date: 2009
  • Doi Number: 10.1016/j.memsci.2009.01.047
  • Journal Name: JOURNAL OF MEMBRANE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.129-137
  • Hatay Mustafa Kemal University Affiliated: No

Abstract

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. (C) 2009 Elsevier B.V. All rights reserved.