Journal
CARBOHYDRATE POLYMERS
Volume 78, Issue 3, Pages 444-448Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2009.04.027
Keywords
Chitosan; Bamboo charcoal; Composite; Film; Mechanical properties
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Funding
- Chulalongkorn Uniiversity Fund (Ratchadaphiseksomphot Endowment Fund), Chulalongkorn University
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Chitosan/bamboo charcoal composite films were prepared by blending chitosan with either virgin bamboo charcoal or bamboo charcoal modified by nitric acid oxidation to provide more hydrophilic regions on the bamboo charcoal surface. Investigation of the physical properties of these composite films revealed that the tensile strength and Young's modulus of the chitosan films were enhanced in a dose-dependent manner by the inclusion of modified bamboo charcoal at up to 1% (w/w), whilst the elongation at break was increased by inclusion of modified bamboo charcoal at up to 0.5% (w/w). In contrast, chitosan composites with virgin bamboo charcoal at up to 0.5% or 1.0% (w/w) showed no enhancement of the tensile strength or Young's modulus, respectively. and both parameters were reduced with higher levels of virgin bamboo charcoal. oil, and especially water, absorption of the composite films displayed a marked and dose-dependent increase compared to those of the pure chitosan film. (C) 2009 Elsevier Ltd. All rights reserved.
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