Production and characterization of films from cotton stalk xylan

Date

2007-12-26

Author

Goksu, Emel I.
Karamanlioglu, Mehlika
Bakir, Ufuk
Yılmaz, Levent
YILMAZER, ÜLKÜ

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Composite film production based on cotton stalk xylan was studied, and the mechanical and physical properties of the films formed were investigated. Xylan and lignin were separated from cellulose by alkali extraction and, then, lignin was removed using ethanol, washing. Self-supporting continuous films could not be produced using pure cotton stalk xylan. However, film formation was achieved using 8-14% (w/w) xylan without complete removal of lignin during xylan isolation. Keeping about 1% lignin in xylan (w/w) was determined to be sufficient for film formation. Films were produced by casting the film-forming solutions, followed by solvent evaporation in a temperature (20 degrees C) and relative humidity (40%) controlled environment. The elastic modulus and hypothetical coating strength of the films obtained by using 8% xylan were significantly different from the ones containing 10-14% xylan. The water vapor transfer rates (WVTR) decreased with increasing xylan concentration, which made the films thicker. The glycerol addition as an additional plasticizer resulting in more stretchable films having higher WVTR and lower water solubility values. As a result, film production was successfully achieved from xylan, which was extracted from an agricultural waste (cotton stalk), and the film-forming effect of lignin on pure xylan has been demonstrated.

Subject Keywords

Hemicellulose, Xylan, Lignin, Cotton stalk, Film, Birchwood xylan

URI

https://hdl.handle.net/11511/39058

Journal

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

DOI

https://doi.org/10.1021/jf071893i

Collections

Department of Chemical Engineering, Article

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Citation Formats

E. I. Goksu, M. Karamanlioglu, U. Bakir, L. Yılmaz, and Ü. YILMAZER, “Production and characterization of films from cotton stalk xylan,” JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, pp. 10685–10691, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39058.