Graphitic Carbon Nitride Reinforced Photopolymer Resin for Additive Manufacturing
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초록
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Digital light processing (DLP) has the advantages of higher printing speed and product precision than other 3D printing technologies. However, DLP products have low mechanical strength owing to the inherent properties of photocurable materials. In this study, Graphitic carbon nitride (GCN) was proposed as a novel reinforcing material to improve the mechanical properties of photocurable epoxy acrylate (EA) resins for DLP. GCN has low solubility in most solvents; thus, to use GCN as a reinforcement of the polymer matrix, optimal dispersion processes must be applied. Two-step processes were applied to disperse GCN within EA for 3D printing process. The tensile strength and elastic modulus of the dispersed GCN reinforced EA composite specimen were measured to be 75.56 MPa and 3,396 MPa, respectively, which were improved by 22% (tensile strength) and 34% (modulus of elasticity) in relation to those of the neat EA specimen.