• Karthik Soundarrajan Sri Krishna College of Engineering and Technology, Tamil Nadu
  • Nitish Kaushik Birla Institute of Technology, Jharkhand
  • C. Shanthi Sona College of Technology, Salem
  • Gnana Sekaran Joshua CSI College of Engineering, The Nilgris
Keywords: coconut inflorescence fibre, unsaturated polyester resin, mercerization, wear, friction coefficient, SEM analysis


The need for eco-friendly materials made researchers move towards lignocellulose fibres as potential fortification materials for polymer matrices. In this regard, a unique fibre known as the coconut inflorescence fiber was extricated from the coconut tree and added to unsaturated polyester resin. As the fibres are subjected to mercerization treatment, XRD and FTIR studies show that the amorphous materials present in the fibers are removed, and the tensile strength of the fibre increases. For the tribology studies of the CIF/polyester composite, the load and sliding distance were chosen as the operation parameters under dry-sliding condition. Extensive testing demonstrated that the wear rate increases as the load increases, and it is reduced as the fiber volume faction increases. Due to the hardness of the composite materials, the wear rate decreases as the sliding distance rises. The composites with fiber volume fraction 25 % exhibit the minimum wear rate of the entire experimentation. Furthermore, the friction coefficient drops as the load and sliding distance increase with the increasing volume fraction, which is due to micro-melting generated by the frictional heat at greater loads. A SEM analysis revealed fiber pull-outs in composites with fiber volume fraction 30 %, owing to a lack of fibril wetting during the manufacturing of composites.


1. Chellamuthu, K., and A. Vasanthanathan. “Experimental Investigation of Fibre Reinforced Plastics (Frp) Structure with Coconut Husk under Low Velocity Impact.” Materials Today: Proceedings 47 (January 1, 2021): 7030–34. https://doi.org/10.1016/J.MATPR.2021.06.078.
2. Muensri, Pakanita, Thiranan Kunanopparat, Paul Menut, and Suwit Siriwattanayotin. “Effect of Lignin Removal on the Properties of Coconut Coir Fiber/Wheat Gluten Biocomposite.” Composites Part A: Applied Science and Manufacturing 42, no. 2 (February 1, 2011): 173–79. https://doi.org/10.1016/J.COMPOSITESA.2010.11.002.
3. Fonteles, Carlos Alberto Lopes, Gustavo Figueiredo Brito, José Francisco Reis Sobrinho, Tatianny Soares Alves, and Renata Barbosa. “Chemical Treatment and Characterization of Fiber of Babassu Coconut Epicarp (<I>Orbignya Phalerata</I>) for Application in Polymeric Composite.” Materials Science Forum 869 (August 2016): 233–36. https://doi.org/10.4028/www.scientific.net/MSF.869.233
4. Jappes, J. T.Winowlin, and I. Siva. “Studies on the Influence of Silane Treatment on Mechanical Properties of Coconut Sheath-Reinforced Polyester Composite.” Polymer - Plastics Technology and Engineering 50, no. 15 (2011): 1600–1605. https://doi.org/10.1080/03602559.2011.593089.
5. Chang, Yao, Tianshu Sun, Chuanjie Fan, and Xiaodong Zhou. “The Effect of Surface Modification on the Properties of Sisal Fiber and Improvement of Interfacial Adhesion in Sisal/Starch Composites Induced by Starch Nanocrystals.” Composite Interfaces 25, no. 11 (November 2, 2018): 981–94. https://doi.org/10.1080/09276440.2018.1450586.
6. Salguero, Jorge, Juan Manuel Vazquez-Martinez, Irene Del Sol, and Moises Batista. “Application of Pin-On-Disc Techniques for the Study of Tribological Interferences in the Dry Machining of A92024-T3 (Al-Cu) Alloys.” Materials, 2018. https://doi.org/10.3390/ma11071236.
7. Karthik, S, and V P Arunachalam. “Investigation on the Tensile and Flexural Behavior of Coconut Inflorescence Fiber Reinforced Unsaturated Polyester Resin Composites.” Materials Research Express 7, no. 1 (January 27, 2020): 015345. https://doi.org/10.1088/2053-1591/ab6c9d.
8. Omrani, Emad, Pradeep L. Menezes, and Pradeep K. Rohatgi. “State of the Art on Tribological Behavior of Polymer Matrix Composites Reinforced with Natural Fibers in the Green Materials World.” Engineering Science and Technology, an International Journal 19, no. 2 (June 1, 2016): 717–36. https://doi.org/10.1016/J.JESTCH.2015.10.007.
9. Rajini, N, K Mayandi, Manoj Prabhakar M, Suchart Siengchin, Nadir Ayrilmis, C Bennet, and S O. Ismail. “Tribological Properties of Cyperus Pangorei Fibre Reinforced Polyester Composites(Friction and Wear Behaviour of Cyperus Pangorei Fibre/Polyester Composites).” Journal of Natural Fibers 18, no. 2 (February 1, 2021): 261–73. https://doi.org/10.1080/15440478.2019.1621232.
10. Ramamoorthy, Sunil Kumar, Fatimat Bakare, Rene Herrmann, and Mikael Skrifvars. “Performance of Biocomposites from Surface Modified Regenerated Cellulose Fibers and Lactic Acid Thermoset Bioresin.” Cellulose 22, no. 4 (2015): 2507–28. https://doi.org/10.1007/s10570-015-0643-x
11. Rattan, Rekha, and Jayashree Bijwe. “Role of Orientation of Graphite Fabric in Polyetherimide Composite with Respect to Loading Direction on the Wear Performance in Various Wear Modes.” Tribology Letters 67, no. 2 (June 22, 2019): 36. https://doi.org/10.1007/s11249-019-1142-2.
12. Gurunathan, T., Smita Mohanty, and Sanjay K. Nayak. “A Review of the Recent Developments in Biocomposites Based on Natural Fibres and Their Application Perspectives.” Composites Part A: Applied Science and Manufacturing 77 (October 1, 2015): 1–25. https://doi.org/10.1016/J.COMPOSITESA.2015.06.007.
13. Rajeshkumar, G., S. Arvindh Seshadri, G. L. Devnani, M. R. Sanjay, Suchart Siengchin, J. Prakash Maran, Naif Abdullah Al-Dhabi, et al. “Environment Friendly, Renewable and Sustainable Poly Lactic Acid (PLA) Based Natural Fiber Reinforced Composites – A Comprehensive Review.” Journal of Cleaner Production 310 (August 10, 2021): 127483. https://doi.org/10.1016/J.JCLEPRO.2021.127483.
14. Cordin, Michael, Thomas Bechtold, and Tung Pham. “Effect of Fibre Orientation on the Mechanical Properties of Polypropylene–Lyocell Composites.” Cellulose 25, no. 12 (December 11, 2018): 7197–7210. https://doi.org/10.1007/s10570-018-2079-6.
How to Cite
Soundarrajan K, KaushikN, Shanthi C, Joshua GS. UNRAVELLING THE TRIBOLOGICAL BEHAVIOUR OF MERCERIZED COCONUT INFLORESCENCE FIBER FORTIFIED UNSATURATED POLYESTER COMPOSITES. MatTech [Internet]. 2022Jun.3 [cited 2024May28];56(3):271–277. Available from: https://mater-tehnol.si/index.php/MatTech/article/view/410