Analysis of the effects of heat treatment on the tensile properties of coir fibres using Minitab-18 statistical software
Article Sidebar
Main Article Content
Abstract
Vacuum oven heat treatments were done to enhance the properties of coir fibre for improved performance in composites. Their effects on the mechanical properties of coir fibres were investigated. As received (AR) coir fibres were subjected to heat treatment temperatures of 80 oC and 160 oC for 6 hours at each temperature in a vacuum oven. The effects of the heat treatment temperature on AR coir fibres were statistically analyzed using ANOVA, F-tests, Fisher Pairwise grouping and Fisher Individual Tests for Difference of Means (FITDM) with Minitab-18 Software. This was done to determine the significance of these heat treatments on the tensile properties of AR coir fibres. Fisher Pairwise grouping and FITDM show that strength and elongation of AR coir fibres differed significantly from coir fibres heat-treated at 80 oC. The tensile strength of AR coir fibres was found to be, respectively, 49% and 24% lower than coir fibres treated at 80 oC and 160 oC. The stiffness of coir fibres (AR) was found to significantly increase after heat-treating at 160 °C, while the elongation at break of AR was 44% higher. The strength distributions obtained from the tensile test data were subjected to two-parameter Weibull statistics. AR coir fibres displayed Weibull moduli that were 16% and 56% higher than coir fibres treated at 80 oC and 160 oC, respectively. SEM was conducted on the samples to delineate the morphological changes affecting the properties of coir fibres.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
References
Malkapuram R, Kumar V, Negi YS. Recent development in natural fiber reinforced polypropylene composites. J Reinf Plast Compos. 2009;28(10):1169-89.
Muensri P, Kunanopparat T, Menut P, Siriwattanayotin S. Effect of lignin removal on the properties of coconut coir fiber/wheat gluten biocomposite. Compos A Appl Sci Manuf. 2011;42(2):173-9.
Nguyen TT, Indraratna B. Experimental and numerical investigations into hydraulic behaviour of coir fibre drain. Can Geotech J. 2017;54(1):75-87.
Satyanarayana KG, Sukumaran K, Mukherjee PS, Pillaim SGK. Materials science of some lignocellulosic fibers. Metallogr. 1986;19(4):389-400.
Baley C, Le Duigou A, Bourmaud A, Davies P. Influence of drying on the mechanical behaviour of flax fibres and their unidirectional composites. Compos A Appl Sci Manuf. 2012;43(8):1226-33.
Ezekiel N, Ndazi B, Nyahumwa C, Karlsson S. Effect of temperature and durations of heating on coir fibers. Ind Crops Prod. 2011;33(3):638-43.
Ochi S. Tensile properties of bamboo fiber reinforced biodegradable plastics. Int J Compos Mater. 2012;2(1):1-4.
Cao Y, Sakamoto S, Goda K. Effects of heat and alkali treatments on mechanical properties of kenaf fibers. 16th International Conference on Composite Materials; 2007 Jul 8-13; Kyoto, Japan. 2007. p. 8-13.
Gourier C, Le Duigou A, Bourmaud A, Baley C. Mechanical analysis of elementary flax fibre tensile properties after different thermal cycles. Compos A Appl Sci Manuf. 2014;64:159-66.
Mir SS, Hasan SMN, Hossain MJ, Hasan M. Chemical modification effect on the mechanical properties of coir fiber. Eng J. 2012;16(2):73-83.
Madueke C. Tensile properties of as-received and surface-treated coir fibres and composites [thesis]. Birmingham: University of Birmingham; 2021.
Shahzad A. A study in physical and mechanical properties of hemp fibres. Adv Mater Sci Eng. 2013;2013:325085.
Arifuzzaman KGM, Alam MS, Terano M. Thermal characterization of chemically treated coconut husk fibre. Indian J Fibre Text Res. 2012;37(1):20-6.
Komuraiah A, Kumar NS, Prasad BD. Chemical composition of natural fibers and its influence on their mechanical properties. Mech Compos Mater. 2014;50:359-76.
Tomczak F, Sydenstricker THD, Satyanarayana KG. Studies on lignocellulosic fibers of Brazil. Part II: morphology and properties of Brazilian coconut fibers. Compos A Appl Sci Manuf. 2007;38(7):1710-21.
Claramunt J, Ardanuy M, García-hortal JA. Effect of drying and rewetting cycles on the structure and physicochemical characteristics of softwood fibres for reinforcement of cementitious composites. Carbohydr Polym. 2010;79(1):200-5.
Ariawan D, Salim MS, Mat Taib R, Ahmad Thirmizir MZ, Mohd Ishak ZA. Interfacial characterization and mechanical properties of heat-treated non-woven kenf fibre and its reinforced composites. Compos Interfaces. 2018;25(2):187-203.
Salim MS, Ariawan D, Ahmad Rasyid MF, Ahmad Thirmizir MZ, Mat Taib R, Mohd Ishak ZA. Effect of fibre surface treatment on interfacial and mechanical properties of non-woven kenaf fibre reinforced acrylic based polyester composites. Polym Compos. 2017;40(S1):214-26.
Yun H, Li K, Tu D, Hu C. Effect of heat treatment on bamboo fiber morphology crystallinity and mechanical properties. Wood Res. 2016;61(2):227-34.
Trujillo E, Moesen M, Osorio L, van Vuure AW, Ivens J, Verpoest I. Bamboo fibres for reinforcement in composite materials: strength Weibull analysis. Compos A Appl Sci Manuf. 2014;61:115-25.
Ochi S, Takagi H, Niki R. Mechanical properties of heat-treated natural fibers. J Soc Mater Sci Jpn. 2002;51(10):1164-8.