Preparation and Some Mechanical Properties of Composite Materials Made from Sawdust, Cassava Starch and Natural Rubber Latex
The composite materials were prepared by sawdust, cassava starch and natural rubber latex (NR). The mixtures of 15%w/v gelatinized cassava starch and 15%w/v PVOH were used as the binder of these composite materials. The concentrated rubber latex was added to the mixtures. They were mixed rigorously to the treated sawdust in the ratio of 70:30 until achive uniform dispersion. The batters were subjected to the hot compression moulding at the temperature of 160°C and 3,000 psi pressure for 5 min. The experimental results showed that the mechanical properties of composite materials, which contained the gelatinized cassava starch and PVOH in the ratio of 2:1, 20% NR latex by weight of the dry starch and treated sawdust with 5%NaOH or 1% BPO, were the best. It contributed the maximal compression strength (341.10 + 26.11 N), puncture resistance (8.79 + 0.98 N/mm2) and flexural strength (3.99 + 0.72N/mm2). It is also found that the physicochemical and mechanical properties of composites strongly depends on the interface quality of sawdust, cassava starch and NR latex.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1074813Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3602
 Winandy, J.E., Stark, N.M. and Clemons, C.M. 2004. Considerations in recycling of wood-plastic composites. In Proceedings of the 5th International Conference on Global Wood and Natural Fibre Composites 2004. Germany. 27-28 April 2004. P A6-1-9.
 Li, X., Tabil, L.G. and Panigrahi, S. 2007. Chemical Treatments of Natural Fiber for Use in Natural Fiber-Reinforced Composites: A Review. J. Polym. Environ. 15: 25-33.
 Fung, J., Li, B., Sun, S. and Zeng, C. 2004. Hardwood vs Softwood - Chemistry Aspect. (Online). Available: http://www.alumni.ca/~libe4b0/chemistry.html. (7 February 2009)
 Lopattananon, N., Panawarangkul, K., Sahakaro, K. and Ellis, B. 2006. Performance of Pineapple Leaf Fiber-Natural Rubber Composites: The Effect of Fiber Surface Treatments. J. Appl. Polym. Sci. 102: 1974-1984.
 Kiatkamjornwong, S., Surunchanajirasakul, P. and Tasakorn, P. 2001. Natural rubber-cassava starch foam by compression moulding. Plast. Rubber Compos. 30: 318-327.
 Siddaramaiah, Raj, Baldev and Somashekar, R. 2004. Structure-property relation in polyvinyl alcohol /starch composites. J. Appl. Polym. Sci. 91: 630-635.
 Grazuleviciene, V., Augulis, L., Grazulevicius, J.V., Kapitanovas, P. and Vedegyte, J. 2007. Biodegradable starch, PVA, and peat composites for agricultural use. Russi. J. Appl. Chem. 80: 1928-1930.
 Shey, J., Imam, S.H., Glenn, G.M. and Orts, W.J. 2006. Properties of baked starch foam with natural rubber latex. Ind. Crops Prod. 24: 34-40.
 Carvalho, A.J.F., Job, A.E., Alves, N., Curvelo, A.A.S. and Gandini, A. 2003. Thermoplastic starch/natural rubber blends. Carbohyd Polym. 53: 95-99.
 Rouilly, A., Rigal, L. and Gilbert, R.G. 2004. Synthesis and properties of composites of starch and chemically modified natural rubber. Polym. 45: 7813-7820.