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All Journal Jurnal Pelayanan dan Pengabdian Masyarakat (Pamas) Indonesian Journal of Computing, Engineering, and Design
Iwan Setiawan
Sampoerna University
Arts Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Indonesian Journal of Computing, Engineering, and Design

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Dynamic Contact Angle and Corrosion Test Measurements on Cu and CuO-Stearic Acid Modifications on Steel Surfaces Iwan Setiawan; Satria Robi Trisnanto; Ika O Suryani
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 2 No. 1 (2020): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v2i1.103

Abstract

In this study, a copper (Cu) coated steel surface’s dynamic contact angle and corrosion rate was compared to the bare steel and stearic acid modified surfaces. Various steps of surface treatment have been performed including electrodeposition of Cu, CuO formation from H2O2 immersion with stearic acid modification to obtain dynamic contact angle and the corrosion rate data. The Cu-coated steel’s dynamic contact angle was increased as it implied the surface after Cu treatment was more hydrophilic than the bare steel, with sliding angle and contact angle hysteresis of 54.9o ± 2.39o and 39.5o ± 1.91o, respectively. However, corrosion test measurements by using a mass loss method to quantify the corrosion rate showed that Cu-coated steel and stearic acid-modified Cu-O coated steel had no remarkable difference in corrosion rate. It was found that the Cu-coated steel and stearic acid-modified Cu-O coated steel had corrosion rate eight times slower than the bare surface.
Mechanical Properties Analysis on the Reduced Graphene Oxide/Silver Nano Particle / Poly Lactic Acid Composites Iwan Setiawan; Charlene Tiara Rehueliah Pingak; Amartya Natayu; Budi Hadisujoto; Murni Handayani
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 5 No. 2 (2023): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v5i2.377

Abstract

We present the characteristics and mechanical strength of rGO-AgNPs nanocomposites in PLA-based 3D printing. The nanocomposites are characterized using X-ray diffraction and UV-Vis spectroscopy. The XRD spectrum reveals diffraction peaks at 38.14°, 44.30°, 64.50°, and 77.42°, corresponding to the (111), (200), (220), and (3111) planes of the Ag crystals, respectively. Surface observations under the microscope for pure PLA and PLA rGO-AgNPs showed that the surfaces of the samples were uniformly distributed. The results of 3D printing indicated that the 0.10 g rGO-AgNPs nanocomposite particles were evenly distributed, although digital microscopy confirmed the presence of a few small particles that were not uniformly distributed. Tensile tests demonstrated that rGO-AgNPs exhibited higher tensile strength compared to pure PLA. Tensile strength increased as the quantity of rGO-AgNPs decreased. Young's modulus results, ranging from pure PLA to rGO-AgNPs, consistently showed an increase, with the highest Young's modulus measuring 7624.45 kPa. Therefore, specimens containing rGO-AgNPs displayed a greater modulus than others, indicating that rGO-AgNPs enhanced the mechanical properties of PLA-based 3D printing.
Co-Authors Aditiya Harjon Amartya Natayu Budi Hadisujoto Charlene Tiara Rehueliah Pingak Ignatius Budi Sutanto Hadisujoto Ika O Suryani Kushendarsyah Saptaji Murni Handayani Satria Robi Trisnanto Wandy Wandy