Cyclodextrin-Containing Membranes. Synthesis and Separation Properties in Pertraction
Conference paper
Abstract
Polymeric membranes were prepared by crosslinking polyvinylalcohol (PVA) and cyclodextrins (CDs) with epichlorohydrin or hexamethylenediisocyanate. Immobilized CDs were shown to enhance the permeation rate of toluene in a water/methanol pertraction system depending on the CD content (0-50 wt%) and the cavity size (α-, ß-, γ-CD). Further increases were observed by replacing α-CD with an α-CD polyrotaxane. This effect was interpreted by the cooperativity of CD cavities in the toluene permeation across channels formed inside the membrane.
Keywords
Feed Solution Separation Property Permeation Rate Downstream Side Xylene Isomer
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Preview
Unable to display preview. Download preview PDF.
References
- [1]Zhou, E. Y., Bertrand, G. L., Armstrong, D. W. (1995) Effects of organic cosolvents on enantio-enrichments via CD-based precipitations: an examination of production efficiency, Sep. Sci. Technol. 30, 2259–2276.CrossRefGoogle Scholar
- [2]Uemasu, I. (1992) Selective liquid-liquid extraction of xylene isomers and ethylbenzene through inclusion by branched α-cyclodextrins, J. Incl. Phenom. 13, 1–7; Andreaus, J., Draxler, J., Marr, R., and Hermetter, A (1997) The effect of ternary complex formation on the partitioning of pyrene and anthracene in aqueous solutions containing sodium dodecyl sulfate and methylated γ-cyclodextrin, J. Colloid Interface Sci. 193, 8-16.CrossRefGoogle Scholar
- [3]Warner-Schmid, D., Tang, Y. and Armstrong, D. W. (1994) Removal of organic compounds from water via adsorption onto polymethylhydrosiloxane pentenyl-ß-cyclodextrin, J. Liquid Chromatogr. 17, 1721–1735.CrossRefGoogle Scholar
- [4]Harada, A., Li, J., Nakamitsu, T., Kamachi, M (1993), Preparation and characterization of polyrotaxanes containing many threaded a-cyclodextrins, J. Org. Chem. 58, 7524–7528CrossRefGoogle Scholar
Copyright information
© Springer Science+Business Media Dordrecht 1999