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All Journal JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Greensusmater
Anisa Fitri
Department of Materials Engineering, Institut Teknologi Sumatera, Terusan Ryacudu, Way Hui, Jati Agung, Lampung Selatan 35365, Indonesia
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Congo red dye adsorption using ZnAl layered double hydroxide fabricated using hydrothermal methods Fitri, Anisa; Lumbanraja, Febriwan Rizki; Hanifah, Istiara Rizqillah; Prasetya, Bayu; Aflaha, Rizky; Putra, Septia Eka Marsha
Greensusmater Vol. 1 No. 2 (2024)
Publisher : Green and Sustainable Materials Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62755/greensusmater.2024.1.2.44-50

Abstract

Industrial dye pollutants, particularly azo dyes like Congo red, pose significant environmental and health risks due to their toxic and non-biodegradable nature. This study assesses ZnAl Layered Double Hydroxide (ZnAl LDH) as an effective adsorbent, incorporating comprehensive materials characterization and adsorption isotherm analyses. Materials characterization using SEM and XRD confirmed the structural integrity and morphological suitability of ZnAl LDH for dye adsorption. Results demonstrated that ZnAl LDH, particularly the HMTA-based variant (h-ZnAl LDH), achieved superior adsorption capacities of up to 17.8 mg/g, significantly outperforming the urea-based (u-ZnAl LDH) with capacity of 12.3 mg/g. Kinetic analysis showed that the pseudo-second-order (PSO) model provided a better fit (R2 = 0.995) than the pseudo-first-order (PFO) model, indicating that chemisorption plays a dominant role in the adsorption mechanism. The adsorption process was also best described by the Langmuir isotherm model (R2 = 0.989), indicating monolayer adsorption on a homogeneous surface, while the Freundlich model (R2 = 0.944) also provided a reasonable fit, suggesting some degree of multilayer adsorption on heterogeneous surfaces. The superior performance of HMTA-based ZnAl LDH presents a significant advancement in wastewater treatment technologies
Mechanical Properties of Sugarcane Bagasse Fiber Composites: Epoxy vs Polyester Resin Matrices Prasetya, Bayu; Solafide Sipahutar, Wahyu; Andryan Prakoso, Ahmad; Fitri, Anisa
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 7 No 01 (2025): JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/permadi.v7i01.186

Abstract

This study aims to evaluate the mechanical properties of sugarcane bagasse bagasse fiber-reinforced composites using two types of matrix resins (i.e epoxy and polyester). The composites were fabricated using the hand lay-up method, with sugarcane bagasse bagasse fibers serving as the natural reinforcement. The tests conducted included visual fracture analysis, tensile testing, and flexural testing. The results showed that the epoxy-based composite achieved a tensile strength of 26.43 MPa, slightly higher than the polyester-based composite at 26.06 MPa. In the flexural test, the epoxy matrix composite exhibited a flexural strength of 89.53 MPa, significantly higher than the polyester matrix at 49.12 MPa. These findings indicate that the type of matrix resin has a significant influence on the mechanical performance of natural fiber composites, particularly in applications requiring high flexural strength.
Effect of Coconut and Sugarcane Fiber Volume Fraction Variations on the Tensile Properties of Epoxy Matrix Composites Fitri, Anisa; Bayu Prasetya; Muhammad Yasin Siregar; Quratul Aini; Wahyu Solafide Sipahutar; Fathar Fathan Mubina
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 7 No 01 (2025): JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/permadi.v7i01.192

Abstract

Materials are continually being developed for sustainable applications. Agricultural wastes such as sugarcane bagasse and coconut fiber show great potential as reinforcing agents in polymer composites. This study investigates the effect of varying volume fractions of sugarcane and coconut fibers on the tensile properties of epoxy matrix composites. Four fiber composition ratios were prepared, maintaining a total fiber volume fraction of 50% and matrix fraction of 50%, specifically: 25:25, 20:30, 10:40, and 0:50 (coconut fiber: sugarcane fiber, respectively). All fibers underwent alkali treatment using a 5% NaOH solution to improve interfacial bonding with the epoxy matrix. Composite fabrication was performed via hand lay-up, and tensile tests followed ASTM D3039 standards using a Universal Testing Machine (UTM). The results indicated that the composite with 20% coconut fiber and 30% sugarcane fiber (sample B) exhibited the highest tensile strength of 30.48 MPa and the highest elastic modulus of 2.29 GPa, albeit with a low strain at failure (0.01), suggesting brittle behavior. In contrast, the balanced composition (25:25) demonstrated more stable mechanical performance, achieving a tensile strength of 28.31 MPa and a higher strain of 0.04, indicating improved toughness. The lowest tensile strength, 15.56 MPa, was observed in the 10:40 composition (sample C). Failure analysis revealed modes such as matrix cracking, fiber-matrix debonding, and fiber pull-out, which varied according to fiber composition. In conclusion, this study demonstrates that a balanced volume fraction of coconut and sugarcane fibers yields epoxy composites with optimal tensile strength and a favorable balance between strength and toughness.
Co-Authors Aflaha, Rizky Andryan Prakoso, Ahmad Bayu Prasetya Fathar Fathan Mubina Hanifah, Istiara Rizqillah Lumbanraja, Febriwan Rizki Muhammad Yasin Siregar Prasetya, Bayu Quratul Aini Septia Eka Marsha Putra Sipahutar, Wahyu Solafide