Influence of Pre-Impregnation Treatment on Bamboo Reinforced Epoxy/UPE Resin Composites

Pradeep Kr. Kushwaha, Rakesh Kumar

Indian Institute of Technology, New Delhi, India.
Indian Plywood Industries Research and Training Institute, Mohali, India.

DOI: 10.4236/ojcm.2012.24017                

Abstract

Bamboo based biocomposites were made with woven bamboo mats and epoxy/unsaturated polyester (UPE) resins. The effects of pre-impregnation on the mechanical and water resistant properties of composites were studied. An alkaline treatment was used to enhance the fiber wetting so as to achieve complete pre-impregnation with epoxy and unsaturated polyester resins. A combined treatment of alkali and dilute epoxy/polyester gives the best result. Bending strength, modulus of elasticity, tensile strength, tensile modulus, impact strength, water absorption were evaluated and compared for all composites. Scanning electron microscopy (SEM) studies of the composites tensile fracture surface also indicated that there is an improved adhesion between fiber and matrix. The mechanical as well as water resistant properties of the biocomposites improved after pre-impregnation treatment.

Keywords

Biocomposites; Pre-Impregnation; Epoxy Resin; Polyester Resin; Mechanical Properties

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	G. Mehta, L. T. Drzal, A. K. Mohanty and M. Misra, “Effect of Fiber Surface Treatment on the Properties of Biocomposites from Nonwoven Industrial Hemp Fiber Mats and Unsaturated Polyester Resin,” Journal of Applied Polymer Science, Vol. 99, No. 3, 2006, pp. 1055-1068. doi:10.1002/app.22620
[2]	I. Van de Weyenberg, J. Ivens, A. De Coster, B. Kino, B. Baetens and I. Verpoest, “Influence of Processing and Chemical Treatment of Flax Fibres on Their Composites Composites,” Science and Technology, Vol. 63, No. 9, 2003, pp. 1241-1246. doi:10.1016/S0266-3538(03)00093-9
[3]	A. Valadez-Gonzaleza, J. M. Cervantes-Uca, R. Olayob and P. J. Herrera-Francoa, “Effect of Fiber Surface Treatment on the Fiber-Matrix Bond Strength of Natural Fiber Reinforced Composites,” Composites: Part B, Vol. 30, No. 3, 1999, pp. 309-320. doi:10.1016/S1359-8368(98)00054-7
[4]	P. J. Herrera-Franco and A. Valadez-González, “A Study of the Mechanical Properties of Short Natural-Fiber Reinforced Composites,” Composites: Part B, Vol. 36, No. 8, 2005, pp. 597-608. doi:10.1016/j.compositesb.2005.04.001