'New tailor-made biopolymers produced from lignocellulosic sugars waste for highly demanding fire-resistant applications'

Bio‐composites for structural applications: Poly‐l‐lactide reinforced with long sisal fiber bundles

Central European Institute of Technology (CEITEC), Brno University of Technology, Technicka 3058/10, 616 00 Brno, Czech Republic

  • Martin P. Ansell, Department of Mechanical Engineering, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom

  • *Correspondence to: M. Prajer (E‐mail: marek.prajer@gmail.com)

    Publication History
    1. Issue published online: 11 AUG 2014
    2. Article first published online: 6 JUN 2014
    3. Manuscript Accepted: 13 MAY 2014
    4. Manuscript Received: 11 NOV 2013
    Funded by
    • BRE Trust
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    SEARCH BY CITATION Volume: Issue: Page: ARTICLE TOOLS View Full Article (HTML) Enhanced Article (HTML) Get PDF (1129K) Keywords:
    • biopolymers and renewable polymers;
    • cellulose and other wood products;
    • composites;
    • mechanical properties;
    • morphology

    Fully bio‐based and biodegradable composites were compression molded from unidirectionally aligned sisal fiber bundles and a polylactide polymer matrix (PLLA). Caustic soda treatment was employed to modify the strength of sisal fibers and to improve fiber to matrix adhesion. Mechanical properties of PLLA/sisal fiber composites improved with caustic soda treatment: the mean flexural strength and modulus increased from 279 MPa and 19.4 GPa respectively to 286 MPa and 22 GPa at a fiber volume fraction of Vf = 0.6. The glass transition temperature decreased with increasing fiber content in composites reinforced with untreated sisal fibers due to interfacial friction. The damping at the caustic soda‐treated fibers‐PLLA interface was reduced due to the presence of transcrystalline morphology at the fiber to matrix interface. It was demonstrated that high strength, high modulus sisal‐PLLA composites can be produced with effective stress transfer at well‐bonded fiber to matrix interfaces. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40999.

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    » Author: Marek Prajer†* andMartin P. Ansell‡

    » Reference: Journal of Applied Polymer ScienceVolume 131, Issue 21, November 5, 2014

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    This project has received funding from the European Unionís Seventh Framework Programme for research, technological development and demonstration