| 초록 |
This study proposes a novel way of creating three-dimensional ceramic object with pre-determine computer modelling design file by photo-curing-assisted 3D plotting technique, which can rapidly photo-polymerized in situ by UV light throughout extruding green filament mixture of biphasic calcium phosphate(BCP) ceramic powders and photocurable monomers and photo initiator, dispersant by a fine nozzle. In particular, a mixture of 90wt% diruethane dimethacraylate(UDMA) and 10wt% triethylene glycol dimethacrylate(TEGDMA) enables the favorable extrusion properties which can have a shear thinning behavior. Most importantly, the slurry also has good shape retention because of high green strength after photo-polymerization. This result has been proven by a free-standing helical architecture, which was successfully produced without any supporting materials. In addition, the unique in situ photo-polymerization process during extrusion allows the green filaments to be strongly bonded each other, while maintaining their circular cross-section, and thus a ceramic scaffold of interconnected pore with a tightly controlled porous structure could be produced. This innovative approach allows for the formation of complex shape architecture such as dense/porous object of mimic natural bone structure. |
