Sutrisno, Rudy Soenoko, Yudy Surya Irawan, Teguh Dwi Widodo
The existence of natural fiber (coconut fiber) in Indonesia is quite abundant and has not been utilized optimally. With these abundant natural resources, it is necessary to conduct research on the benefits of natural fibers as reinforcement in composite materials. Alkalization treatment is a method to improve fiber and matrix compatibility. The purpose of this study was to analyze the effect of treatment of coco fiber soaked in limestone water as a reinforcement for composite materials. Limestone water is used as a fiber alkalizing medium. Limestone water is used as an effort to clean the surface of the fiber and make the fiber stronger. The research method used is the hands lay-up method. As follows the first coconut coir without treatment and treatment 4, 8, 12, 16, and 20 hours of immersion, with a fixed variation of 5% limestone and a constant variation of 20% coconut coir fiber. Then each treatment specimen was molded into a composite according to the ASTM D638 tensile test standard. The results showed that the composite reinforced with coconut fiber with 8 hours of immersion had a better tensile strength than the others, namely 98.46 MPa. While the composites with 0, 4, 12, 16, and 20 hours of immersion respectively were 90.34 MPa, 95.76 MPa, 97.356 MPa, 96.87 MPa, and 94,151 MPa. This shows that the fiber with 8 hours of immersion, the fiber becomes stronger and the bond between the fiber and the matrix occurs well. © 2023 Author(s).
Department of Mechanical Engineering, Merdeka University, Madiun, 63133, Indonesia; Department of Mechanical Engineering, Brawijaya University, Malang, 65145, Indonesia
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