Biodegradability Evaluation of Polylactic Acid Composite with Natural Fiber (Sisal)
Due to increasing environmental pressure for biodegradable products, especially in polymeric materials, in order to meet the demands of the biological cycles of the circular economy, new materials have been developed as a sustainability strategy. This study proposes a composite material developed from the biodegradable polymer PLA Ecovio® (polylactic acid - PLA) with natural sisal fibers, where the soybean ester was used as a plasticizer, which can aid in adhesion between the materials and fibers, making the most attractive final composite from an environmental point of view. The composites were obtained by extrusion. The materials tests were produced and submitted to biodegradation tests. Through the biodegradation tests, it can be seen that the biodegradable polymer composition with 5% sisal fiber presented about 12.4% more biodegradability compared to the polymer without fiber addition. It has also been found that the plasticizer was not a compatible with fibers and the polymer. Finally, fibers help to anticipate the decomposition process of the material when subjected to conditions of a landfill. Therefore, its intrinsic properties are not affected during its use, only the biodegradation process begins after its exposure to landfill conditions.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1474339Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 289
 Velde, K van de; Kiekens, P. Biopolymers: overview of several properties and consequences on their applications. Polymer Testing, (s.l.), v. 21, n. 4, p.433-442, 2002. Elsevier BV. http://dx.doi.org/10.1016/s0142-9418(01)00107-6.
 Yu, Long; Dean, Katherine; Li, Lin. Polymer blends and composites from renewable resources. Progress In Polymer Science, (s.l.), v. 31, n. 6, p.576-602, jun. 2006. Elsevier BV. http://dx.doi.org/10.1016/j.progpolymsci.2006.03.002.
 Oksman, K.: High quality flax fibre composites manufactured by the resin transfer moulding process. Journal of Reinforced Plastics and Composites, Suécia, v 20, n. 7, 2001.
 Badia, J. D. et al... 2017. “Effect of sisal and hydrothermal ageing on the dielectric behaviour of polylactide/sisal biocomposites”. Composites Science and Technology 149:1–10.
 Li, Yan, Y. W. Mai, e L. Ye. 2000. “Sisal fibre and its composites: a review of recent developments”. Composites Science and Technology 60(11):2037–55.
 Satyanarayana, Kestur G.; Arizaga, Gregorio G. C.; Wypych, Fernando. Biodegradable composites based on lignocellulosic fibers—An overview. Progress In Polymer Science, (s.l.), v. 34, n. 9, p.982-1021, set. 2009. Elsevier BV. http://dx.doi.org/10.1016/j.progpolymsci.2008.12.002.
 Lasprilla, Astrid J.r. et al... Poly-lactic acid synthesis for application in biomedical devices — A review. Biotechnology Advances, (s.l.), v. 30, n. 1, p.321-328, jan. 2012. Elsevier BV. http://dx.doi.org/10.1016/j.biotechadv.2011.06.019.
 Badia, J. D. et al... 2017. “Relevant factors for the eco-design of polylactide/sisal biocomposites to control biodegradation in soil in an end-of-life scenario”. Polymer Degradation and Stability, 143:9–19.
 Rajesh, M., Jeyaraj Pitchaimani, e N. Rajini. 2016. “Free Vibration Characteristics of Banana/Sisal Natural Fibers Reinforced Hybrid Polymer Composite Beam”. Procedia Engineering, 144:1055–59. (http://dx.doi.org/10.1016/j.proeng.2016.05.056).
 Barreto, A.c.h. et al... Properties of sisal fibers treated by alkali solution and their application into cardanol-based biocomposites. Composites Part A: Applied Science and Manufacturing, (s.l.), v. 42, n. 5, p.492-500, maio 2011. Elsevier BV. http://dx.doi.org/10.1016/j.compositesa.2011.01.008.
 BASF. Data sheets Ecovio. 2016. Available in:
 Resypar Indústria E Comércio LTDA. Data sheets RESYFLEX®K-10. 2016. Available in: < http://www.resypar.com.br/produtos/resyflexk-10/>. Access in: 15 dez 2016.
 Grieco, C. V.; Carezzato, C. R.; Staschower, F. Estudo de Biodegradabilidade de Bioplásticos. São Caetano do Sul: (s.n.), 2009.