| 초록 |
Poloxamer is a thermo-responsive triblock copolymer which consists of hydrophobic poly(propylene oxide) core block and hydrophilic poly(ethylene oxide) side blocks. The thermal responsive property came from its structure, in which the hydrophobic block dehydrates at elevated temperature, forming a core for spherical micelles. This reversible micelle formation allows it to have controllable viscosity depending on temperature, which is essential for a 3D printing ink. The ink should be viscous enough to maintain its structure upon deposition, without clogging the nozzle. In this study, we synthesized Poloxamer 407 with methacrylate group to crosslink the 3D printed structure and prevent it from dissolves out in water. This method is versatile, because various functionalities can be added to the ink, such as enhanced mechanical strength and conductivity. In addition, through extrusion method, multi-material preparation can be performed, allowing for a more complex printing structure. |
