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All Journal Traksi : Majalah Ilmiah Teknik Mesin Jurnal Momentum Jurnal Teknik Mesin Turbo : Jurnal Program Studi Teknik Mesin Jurnal Ipteks Terapan Jurnal Teknik Mesin Cakram Jurnal Teknik Mesin pendidikan, science, teknologi, dan ekonomi Journal of Fibers and Polymer Composites Jurnal Teknologi dan Vokasi
Mastariyanto Perdana
Institut Teknologi Padang
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health

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SIFAT MEKANIK KOMPOSIT ARANG AKTIF BERBAHAN DASAR LIMBAH CANGKANG KEMIRI DAN RESIN EPOKSI Pratiwi, Putri; Nurzal, Nurzal; Hafni, Hafni; Perdana, Mastariyanto
Jurnal Teknologi dan Vokasi Vol 4 No 1 (2026): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2026.4.1.%p

Abstract

This study investigates the effect of weight fraction in an epoxy-based composite reinforced with candlenut shell charcoal powder on mechanical properties, specifically shear strength and flexural strength. The filler consisted of candlenut shell charcoal powder with a particle size of 841 to 1190 μm. The candlenut shell charcoal to epoxy matrix ratios were varied at 55:45 %wt, 60:40 %wt, 65:35 %wt, 70:30 %wt, 75:25 %wt, 80:20 %wt, and 85:15 %wt. Composite specimens were prepared by homogeneous mixing, molding, and followed by room-temperature curing before mechanical testing. Mechanical characterization was conducted through flexural and shear tests using a Universal Testing Machine (UTM) with appropriate fixtures for each test method. The results indicate that increasing the filler fraction tends to reduce the mechanical performance of the composites. The highest flexural strength was obtained at 55:45 %wt by 16.63 MPa, while the lowest value was recorded at 85:15 %wt by 4.88 MPa. The highest shear strength also occurred at 55:45 %wt by 8.87 MPa and reached the minimum at 80:20 %wt by approximately 1.65 MPa, with a sharp decrease observed at 70:30 %wt. Overall, the findings demonstrate that increasing the candlenut shell charcoal powder fraction decreases both flexural and shear strengths. This degradation at high filler loadings is associated with reduced epoxy wetting of particles, increased agglomeration and porosity, and weakened load transfer across the filler–matrix interface. These results suggest that the composite formulation requires an optimum filler fraction and careful control of mixing and molding processes to achieve more stable mechanical performance.
The Effect of Temperature on Manufacturing Process of Tannin Acid-Based Adhesive Materials on Mechanical and Physical Properties Perdana, Mastariyanto; Abral, Hairul; Son, Lovely; Masruchin, Nanang; Azmi, Muhammad; Kadriadi, Kadriadi
Journal of Fibers and Polymer Composites Vol. 5 No. 1 (2026): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v5i1.570

Abstract

This study focuses on the development and characterization of adhesives based on Polyvinyl Alcohol (PVA), Tannic Acid (TA), and Cellulose Nanofibre (CNF). The main objective is to optimize the temperature used in the production process. Phenol-formaldehyde and other synthetic adhesives frequently encounter environmental obstacles, necessitating the search for more ecologically sound alternatives. TA, a naturally occurring polyphenolic molecule, has significant potential as an eco-friendly glue ingredient. This study assesses the impact of temperature fluctuations (30, 45, 60, 75, and 90°C) during the glue manufacturing process on its mechanical characteristics, specifically emphasizing shear stress. Experiments were conducted at a rotational speed of 1500 revolutions per minute (RPM) for 30 minutes. The results indicated that the adhesive performed best at 90°C, achieving a maximum shear stress value of 3.41 MPa. The results demonstrated a significant enhancement in the shear strength of the bioadhesive, exhibiting an approximately sixfold increase as the processing temperature was elevated from 30°C to 90°C. Microstructural analysis reveals that the voids formed during the mixing process decrease at this specific temperature. The results indicate that elevated temperatures lead to a significant reduction in void formation. The FTIR measurement revealed the absorption of hydroxyl groups around 3305 cm⁻¹, suggesting the presence of robust crosslinking. Furthermore, elevated temperatures lead to a significant reduction of free OH- groups within the bioadhesive. The PVA/TA/CNF adhesive possesses extensive potential for application in industries that necessitate adhesives with exceptional strength. The study is anticipated to offer comprehensive understanding of how to improve the manufacturing process of TA-based adhesives, and its impact on the creation of adhesive materials that are more sustainable and environmentally friendly.
Co-Authors Abral, Hairul Ahmad Fachrurrozi Akmal Akmal Akmal Akmal Alfith Alfith Alfurqan, Rahmat Ardhy Meidianda Eko Kasmianto, Eko Farid Septio Matrilindo Firdaus, Syahrul gustio mitro Hafni Hafni Hengki Putra Jamasri . Kadriadi, Kadriadi Lovely Son, Lovely Meiki Eru Putra Muhammad Azmi, Muhammad Muhammad Syaifullah, Muhammad Murfid Al Ikram Nanang Masruchin Nofriady Handra, Nofriady Nurzal, Nurzal Pratiwi, Putri Putri Pratiwi Putri Pratiwi Romi Romi, Romi Rozi Saferi Rozi Saferi Rozi Saferi, Rozi Septio Matrilindo, Farid Sulaiman Sulaiman Syafrul Hadi Syahrul Firdaus Yulianti, Lusi