Speaker
Description
The 3D printing systems based on resin vat photopolymerization such as stereolithography (SLA) and digital light projection (DLP) techniques have become more accessible. These 3D printing technologies have numerous applications in different industries. This research aims to enhance mechanical properties of 3D-printed objects by adding carbon-based material i.e., graphene and carbon nanotubes into liquid polymers. The liquid crystal display (LCD) 3D printing technique, which is adapted from the DLP method, was performed in this work. It uses LCD screen and UV LED backlighting to cure liquid resin in the vat layer-by-layer. The carbon nanotubes and graphene were composited into the liquid resin to enhance the mechanical properties. This carbon material amount compared to initial resin was varied into 0.05, 0.1 and 0.2% w/w. The 3D-printed samples were conducted tensile testing with ASTM D638 type V standard model. The 0.1% w/w graphene mixed resin specimen with 20 seconds exposure time shows the elastic modulus with increasing from 7.31 ± 1.02 MPa to 9.38 ± 0.37 MPa and 3.87 ± 1.13 MPa to 5.28 ± 0.73 MPa for maximum tensile strength.
