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All Journal Advance Sustainable Science, Engineering and Technology (ASSET)
Januar Parlaungan Siregar
Universiti Malaysia Pahang Al-Sultan Abdullah
Chemistry Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering

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Effect of Printing Speed on the Properties of 3D Printed Products Using Recycled PET Filament Deni Fajar Fitriyana; Agung Efriyo Hadi; Nugroho Suhodo; Aldias Bahatmaka; Januar Parlaungan Siregar; Tezara Cionita; Zuhriyan Ash Shiddieqy Bahlawan; Achmad Yanuar Maulana
Advance Sustainable Science Engineering and Technology Vol. 8 No. 3 (2026): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i3.2049

Abstract

Recycled PET has been widely studied for its potential use in 3D printing applications. However, few research has examined how printing speed affects recycled PET filament products' mechanical and physical qualities. This research examines how printing speed influences the physical and mechanical qualities of 3D-printed PET filament goods created from mineral water bottle trash. In this study, filament fabrication is carried out using the homemade pultrusion machine, then the filament is used for 3D printing with variations in printing speed (30, 45, and 60 mm/s). The conducted tests comprise density, tensile, hardness, and compressive testing to examine their physical and mechanical properties. This research found that 45 mm/s printing produced specimens with the maximum density, tensile strength, and hardness. The material reached a density of 0.968 g/cm³, tensile strength of 15.752 N/mm², and hardness of 43.50 Shore D under these circumstances. In contrast, specimens printed at 30 mm/s and 45 mm/s showed the greatest (10.841 N/mm²) and lowest (6.510 N/mm²) compressive strengths. The density, hardness, and tensile strength of 3D-printed specimens improved as the printing speed increased from 30 to 45 mm/s. Printing rates above 45 mm/s reduced specimen density, hardness, and tensile strength. This work promotes sustainable manufacturing by showing that recycled PET filament may be used for 3D printing and how printing speed affects material qualities, thereby promoting sustainable production practices and reduce dependence on virgin materials.
Mechanical Performance of Alkali-Treated Rattan Strips with Epoxy Coating for Sustainable Composite Applications Sujentheran Nair Kalatharan; Al Ichlas Imran; Agustinus Purna Irawan; Januar Parlaungan Siregar; Tezara Cionita; Deni Fajar Fitriyana; Samsudin Anis; Rozanna Dewi; Yuris Setyoadi; Wisnu Prayogo
Advance Sustainable Science Engineering and Technology Vol. 7 No. 3 (2025): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i3.2017

Abstract

The use of natural materials like rattan in eco-friendly composites is gaining attention in materials engineering. However, its hydrophilic nature and interaction with other materials can affect mechanical strength. This study investigates how variations in rattan size and alkali treatment influence the tensile properties of single rattan strips through an epoxy dipping process. Rattan was prepared with varying lengths (5–15 cm), widths (3–8 mm), and a consistent thickness (0.5 mm). Alkali treatment used 5% and 10% NaOH concentrations for 1 and 24 hours. Tensile testing showed that a 5 cm × 8 mm strip achieved the highest tensile strength (49.95 MPa), Young's modulus (3562.77 MPa), and low strain (5.4%), while the 15 cm × 3 mm strip had the lowest strength (9.48 MPa) and modulus (475.69 MPa) with higher strain (10.32%). A 5% NaOH treatment for 24 hours improved adhesion and performance, while 10% caused degradation.
Mechanical Performance of Epoxy Composite Reinforced with Wood Dust and Crumb Rubber Waste Al Ichlas Imran; Januar Parlaungan Siregar; Tezara Cionita; Deni Fajar Fitriyana; Samsudin Anis; Rozanna Dewi; Thomas Junaedi; Etanto Heiliano Wijayanto; Wisnu Prayogo
Advance Sustainable Science Engineering and Technology Vol. 7 No. 4 (2025): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i4.2041

Abstract

The incorporation of wood dust and crumb rubber waste as filler in polymer matrix composite still requires in-depth evaluation of mechanical properties because they have different characteristics. This study evaluates the tensile, flexural, and hardness properties of epoxy composites reinforced with various fractions of wood dust and crumb rubber (5, 10, and 15%). The results showed that the composite with 5% crumb rubber produced the highest tensile strength of 15.52 MPa (CR5), while the highest flexural strength was 30.46 MPa (CR10), and the highest hardness was 75.9 HRC (CR15), indicating superior performance for CR fillers. The observations of the fracture surface showed that increasing the fraction of wood dust contributed to lowering the mechanical performance due to the relatively large distribution of voids and agglomeration. This finding confirms the importance of filler type and fraction selection on composite performance. Future research is recommended to explore filler surface modification and hybrid combinations to improve dispersion and bonding between phases in composites.
Loading-Dependent Physicochemical Characteristics of LiMn2O4 Composites with Plasma-Modified and Ammonia-Functionalized Rice Husk Carbon Harianingsih Harianingsih; Deni Fajar Fitriyana; Januar Parlaungan Siregar; Agung Budiwirawan; Ari Dwi Nur Indriawan; Suryo Wiroyudho Wibowo; Rizky Ilham Fadzillah; Nabila Khoirunisa
Advance Sustainable Science Engineering and Technology Vol. 8 No. 4 (2026): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i4.2915

Abstract

This study investigates LiMn2O4 composites incorporated with nitrogen-functionalized rice husk-derived carbon as a sustainable secondary phase for cathode material development. Rice husk carbon was prepared through carbonization, acid-assisted activation, plasma treatment, and ammonia functionalization, then mechanically blended with LiMn2O4 at 2, 3, and 4 wt.% to obtain LMO-NC2, LMO-NC3, and LMO-NC4, respectively. FTIR analysis showed absorption bands at approximately 3390, 1625, 1400, 1008, 832, 702, and 460 cm⁻¹, corresponding to O–H, C=C, C=N, Si–O, and Mn–O-related vibrations. The minimum transmittance decreased from LMO-NC2 to LMO-NC4, particularly at ~1400 cm⁻¹ from 17.13% to 16.01%, indicating stronger carbon/nitrogen-related surface features. SEM revealed layered LiMn2O4, fine carbon deposits, interparticle voids, and agglomeration. XRD showed characteristic spinel LiMn2O4 indexed to the (111), (311), (222), (400), (331), (511), and (440) planes. BET adsorption volume increased from 160 cc/g for LMO-NC2 to approximately 169 and 176 cc/g for LMO-NC3 and LMO-NC4 at P/P₀ = 0.31. These findings demonstrate the potential of rice husk-derived carbon for sustainable LiMn2O4 composite design, supporting responsible consumption and production under SDG 12.
Sustainable Utilization of Jute Sack Waste in Jute/Epoxy Laminate: Effect of Fiber Orientation for Bumper Applications Heri Yudiono; Hadromi; Deni Fajar Fitriyana; Januar Parlaungan Siregar; Tezara Cionita; Much Rizky Ubaidillah; Ayyub Ridananda; Rahmat Hidayat
Advance Sustainable Science Engineering and Technology Vol. 8 No. 4 (2026): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i4.3086

Abstract

Fiber orientation plays a major role in controlling the mechanical properties of natural fiber bio composites. An investigation into the impact of fiber direction variations on the toughness and tensile strength of burlap waste composites for automobile bumpers was carried out. This research was designed as a controlled experimental investigation. The factors evaluated were fiber orientation, while the tensile strength and impact toughness were. Bio composites were manufactured utilizing the hand lay-up procedure, and mechanical testing included tensile (ASTM D638) and impact (ASTM 4812). The number of test replications was fixed at three specimens for each variable. By improving interfacial adhesion, the 0°/+90°/0°/+90°/0° fiber orientation produces a tensile strength of 21.087 N/mm² and an impact toughness of 0.0482 J/mm², which is higher than a car bumper. These research show proof that burlap sack waste-based composites can be used as an alternative material for environmentally acceptable and sustainable bumpers. These findings complement SDG 12, which focuses on responsible production and consumption.
Co-Authors Achmad Yanuar Maulana Agung Budiwirawan Agung Efriyo Hadi Agustinus Purna Irawan Al Ichlas Imran Aldias Bahatmaka Ari Dwi Nur Indriawan Ayyub Ridananda Bahlawan, Zuhriyan Ash Shiddieqy Etanto Heiliano Wijayanto Fitriyana, Deni Fajar Hadromi Harianingsih, Harianingsih Heri Yudiono Much Rizky Ubaidillah Nabila Khoirunisa Nugroho Suhodo Rahmat Hidayat Rizky Ilham Fadzillah Rozanna Dewi Samsudin Anis Sujentheran Nair Kalatharan Suryo Wiroyudho Wibowo Tezara Cionita Tezara Cionita Thomas Junaedi Wisnu Prayogo Yuris Setyoadi