Design and optimization of biopolyester bagasse fiber composites

Hodzic, A, Coakley, R, Curro, R, Berndt, C and Shanks, R 2007, 'Design and optimization of biopolyester bagasse fiber composites', Journal of Biobased Materials and Bioenergy, vol. 1, pp. 46-55.


Document type: Journal Article
Collection: Journal Articles

Title Design and optimization of biopolyester bagasse fiber composites
Author(s) Hodzic, A
Coakley, R
Curro, R
Berndt, C
Shanks, R
Year 2007
Journal name Journal of Biobased Materials and Bioenergy
Volume number 1
Start page 46
End page 55
Total pages 10
Publisher American Scientific Publishers
Abstract Bagasse fiber, a by-product of the sugar making process, maintains a coherent xylem structure and can offer mechanical reinforcement to composite materials. Biopolyester bagasse composites were prepared with biodegradable matrices polyhydroxylbutyrate (PHB) and its copolymer containing polyhydroxyvalerate (PHBV). Both biopolymers were reinforced with treated and untreated bagasse fibers, as well as fiber volume fractions involving two fiber lengths. Optimized properties were achieved with PHB-bagasse composite surpassing the PHB flexural strength by 50% and achieving higher strength and modulus than the standard thermoplastics. The bagasse fibers were cleaned with boiling water and acetone soxhlet extraction to avoid using adhesive chemicals and, therefore, comply with biosafety standards in the packaging industry. A significant improvement in the interfacial stress transfer between the fiber and the matrix was achieved with the fibers subjected to both washing and acetone treatment. While the crystallization of PHBV was shown to be controllable by processing conditions, it was concluded that no transcrystalline region was formed with this particular resin in any of the composites. Bagasse was shown to be an effective filler for PHBV; although the results varied somewhat due to the surface treatment of the bagasse fibers. On average, long fiber bagasse composites displayed flexural moduli 33% higher than those of PHBV. Overall, the results demonstrated the positive potential of bagasse to reinforce both biopolyester matrices.
Subject Physical Chemistry of Materials
Chemical Characterisation of Materials
Keyword(s) green composites
biodegradable
bagasse
renewable materials
DOI - identifier 10.1166/jbmb.2007.005
ISSN 1556-6560
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