Process Analysis of DLP Photocuring 3D Printing with Modified High-strength Resin

Abstract

Abstract The excellent properties of graphene oxide, along with its dispersibility and hydrophilicity, make it suitable for blending with other substrates to obtain reinforcements. In this paper, high-strength photosensitive resin is mixed with graphene oxide to obtain reinforced photosensitive resin. The impact of different mass fractions of graphene oxide on the appearance, dimensional accuracy, bending strength, tensile strength, and fracture morphology of printed samples is investigated using DLP surface molding 3D printing technology. As the mass fraction of graphene oxide increases, the size error of the printed sample decreases, while the bending strength and tensile strength increase, indicating a favorable bonding effect. However, when the mass fraction of graphene oxide exceeds 0.6%, the bonding between the two materials becomes poorer, leading to the opposite outcome. The hierarchical influence of different parameters on the tensile strength of mixed-material DLP printed samples can be summarized as follows: graphene oxide content exhibits the strongest influence, followed by layer thickness, exposure time, and exposure intensity.