Kenaf Bast Fibers—Part I: Hermetical Alkali Digestion

Autor: Jinshu Shi, Sheldon Q. Shi, H. Michael Barnes, Mark Horstemeyer, Jinwu Wang, El-Barbary M. Hassan
Jazyk: angličtina
Rok vydání: 2011
Předmět:
Zdroj: International Journal of Polymer Science, Vol 2011 (2011)
Druh dokumentu: article
ISSN: 1687-9422
1687-9430
DOI: 10.1155/2011/212047
Popis: The objective of this study was to develop a hermetical alkali digestion process to obtain single cellulosic fibers from kenaf bast. Kenaf bast were hermetically digested into single fiber using a 5% sodium hydroxide solution for one hour at four different temperatures (80°C, 110°C, 130°C, and 160°C). The hermetical digestion process used in this study produced fibers with high cellulose content (84.2–92.3%) due to the removal of lignin and hemicelluloses. The surface hardness and elastic modulus of the fibers digested at 130°C and 160°C were improved significantly compared with those digested at 80°C. The tensile modulus and tensile strength of the individual fibers reduced as the digestion temperature increased from 110°C to 160°C. Micropores were generated in fiber cell wall when the fibers were digested at 130°C and 160°C. The studies on the composites that were made from polypropylene reinforced with the digested fibers indicated that the compatibility between the digested fibers and polypropylene matrix was poor.
Databáze: Directory of Open Access Journals
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