Abstract
Environment-friendly fiber-reinforced composites were fabricated using ramie fibers and soy protein isolate (SPI) and were characterized for their interfacial and mechanical properties. Ramie fibers were characterized for their tensile properties and the parameters for the Weibull distribution were estimated. Effect of glycerol content on the tensile properties of SPI was studied. Interfacial shear strength (IFSS) was determined using the microbond technique. Based on the IFSS results and fiber strength distribution, three different fiber lengths and fiber weight contents (FWC) were chosen to fabricate short fiber-reinforced composites. The results indicate that the fracture stress increases with increase in fiber length and fiber weight content. Glycerol was found to increase the fracture strain and reduce the resin fracture stress and modulus as a result of plasticization. For 10% (w/w) of 5 mm long fibers, no significant reinforcement effect was observed. In fact the short fibers acted as flaws and led to reduction in the tensile properties. On further increasing the fiber length and FWC, a significant increase in the Young's modulus and fracture stress and decrease in fracture strain was observed as the fibers started to control the tensile properties of the composites. The experimental data were compared to the theoretical predictions made using Zweben's model. The experimental results are lower than the predicted values for a variety of reasons. However, the two values get closer with increasing fiber length and FWC.
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References
The Corporate Units in the Daimler-Benz Group, Daimler-Benz High Tech Report 2, 1995, 1.
A. K. MOHANTY, M. MISRA and G. HINRICHSEN, Macromolecular Materials and Engineering 276 (2000) 1.
K. JOSEPH, S. THOMAS and C. PAVITHRAN, Polymer 37 (1996) 5139.
J. H. PEDRO and D. J. A. MANUEL, J. Appl. Polym. Sci. 65 (1997) 197.
J. P. SCHNEIDER and A. C. KARMAKER, J. Mater. Sci. 15 (1996) 201.
S. LUO and A. N. NETRAVALI, Polymer Composites 20 (1999) 367.
Idem., J. Mater. Sci. 34 (1999) 3709.
L. JIANG and G. HINRICHSEN, Die Angewandte Makromokulare Chemie 268 (1999) 13.
A. K. MOHANTY, M. A. KHAN and G. HINRICHSEN, Composites: Part A 31 (2000) 143.
R. P. WOOL, S. KOSEFOGLU, R. ZHAO, G. PALMESE and S. KHOT, International Patent Publication No.WO 99/21900, May 6, 1999.
J. U. OTAIGBE, H. GOEL, T. BABCOCK and J. JANE, Journal of Elastomers and Plastics 31 (1999) 56.
I. PAETAU, C. Z. CHEN and J. L. JANE, Industrial and Engineering Chemistry Research 33 (1994) 1821.
S. F. THAMES and L. ZHOU, in Proceedings of the International Conference on Composites Engineering-5, Las Vegas, July 5–11, 1998, p. 887.
F. LIANG, Y. WANG and S. SUN, Journal of Polymer Engineering 19 (1999) 383.
P. LODHA and A. N. NETRAVALI, in Proceedings of the International Conference on Composites Engineering-7, Denver, July 2–8, 2000, p. 655.
Idem., in “Recent Advances in Polymers and Composites, ” edited by G. N. Mathur, L. D. Kandpal and A. K. Sen (Allied Publishers, New Delhi, India, 2000), p. 3.
K. LIU, in “Soybeans-Chemistry, Technology and Utilization” (International Thomson Publishing, Florence, KY, 1997) p. 25, 386, 389, 392.
J. C. CHEFTEL, J. L. CUQ and D. LORIENT, in “Food Chemistry, ” edited by O. R. Fennama (Dekker, New York, 1985), p. 279, 289, 336 and 343.
T. E. CREIGHTON, “Proteins: Structure and Molecular Properties, ” 2nd ed. (Freeman, New York, 1993) p. 1.
L. G. ANGELINI, A. LAZZERI, G. LEVITA, D. FONTANELLI and C. BOZZI, Industrial Crops and Products 11 (2000) 145.
B. W. ROSEN, Amer. Inst. Aeronaut. Astronaut. (AIAA) 2 (1964) 1985.
P. J. HERRERA-FRANCO and L. T. DRZAL, Composites 23 (1992) 2.
A. N. NETRAVALI and W. SACHSE, Polymer Composites 12 (1991) 370.
A. N. NETRAVALI, L. T. T. TOPOLESKI, W. H. SACHSE and S. L. PHOENIX, Composite Science and Technology 35 (1989) 13.
L. J. BROUTMAN, “Interfaces in Composites, ” ASTM STP 452 (American Society for Testing and Materials, 1969) p. 27.
S. LUO and A. N. NETRAVALI, Journal of Adhesion Science and Technology 15 (2001) 423.
C. T. CHOU, U. GAUR and B. MILLER, Journal of Adhesion 53 (1995) 33.
B. MILLER, P. MURI and L. REBENFELD, Composite Science and Technology 28 (1987) 17.
A. N. NETRAVALI and Z. F. LI, “Polymer and Fiber Science: Recent Advances, ” edited by R. E. Fornes, R. D. Glibert and H. Mark (VCH Publishers, New York, 1992), ch. 6, p. 67.
P. S. MUKHERJEE and K. G. SATYANARAYANA, J. Mater. Sci. 21 (1986) 51.
P. LODHA, Master of Science-thesis, Cornell University, Ithaca, NY, 2001, p. 45.
C. ZWEBEN, H. T. HAHN and T. W. CHOU, in “Mechanical Behavior and Properties of Composite Materials, Delaware Composites Design Encyclopedia, ” Vol. 1, edited by L. A. Carlsson and J. W. Gillespie (Technomic Publishing, Lancaster, PA, 1989) p. 34.
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Lodha, P., Netravali, A.N. Characterization of interfacial and mechanical properties of “green” composites with soy protein isolate and ramie fiber. Journal of Materials Science 37, 3657–3665 (2002). https://doi.org/10.1023/A:1016557124372
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DOI: https://doi.org/10.1023/A:1016557124372