| 초록 |
In this study, a simple method to prepare direct-writable and thermally one-step curable epoxy/alumina inks is demonstrated. In the proposed method, colloidal inks consisting of a mixture of ordinary epoxy resin and anhydride-type hardener with the suspended alumina microparticles is “stained” with small amounts of water, which increases the elasticity of the ink via the interparticle capillary attraction, and promotes the curing reaction of the epoxy matrix in low temperature ranges, causing the 3D-printed ink to avoid the structural disruption during the course of one-step thermal curing process without tedious pre-curing step. It is confirmed that added water does not deteriorate the thermal conductivity of the cured epoxy/alumina composite, which is approximately 300 % higher than that of base epoxy matrix, demonstrating the potential of the presented water-stained composite ink in thermal management applications. |
