Mechanical Properties Analysis on the Reduced Graphene Oxide/Silver Nano Particle / Poly Lactic Acid Composites

Iwan Setiawan (Information System Department, Faculty of Engineering and Technology, Sampoerna University, Jakarta 12780, Indonesia)
Charlene Tiara Rehueliah Pingak (Mechanical Engineering Department, Faculty of Engineering and Technology, Sampoerna University, Jakarta 12780, Indonesia)
Amartya Natayu (Mechanical Engineering Department, Faculty of Engineering and Technology, Sampoerna University, Jakarta 12780, Indonesia)
Budi Hadisujoto (Mechanical Engineering Department, Faculty of Engineering and Technology, Sampoerna University, Jakarta 12780, Indonesia)
Murni Handayani (Research Center for Advanced Materials – National Research and Innovation Agency (BRIN), Tangerang, Selatan 15314, Indonesia)

Indonesian Journal of Computing, Engineering, and Design
Vol. 5 No. 2 (2023): IJoCED

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.