期刊
JOURNAL OF MEMBRANE SCIENCE
卷 332, 期 1-2, 页码 129-137出版社
ELSEVIER
DOI: 10.1016/j.memsci.2009.01.047
关键词
Cyclodextrin; Electrospinning; Nanofiber; Polystyrene; Nanofilter
资金
- Danish Advanced Technology Foundation
- Fibertex A/S
- Danish Research Agency
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.
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