High‐resolution <scp>3D</scp> printing resin reinforced by polyurethane filler particles; physical and mechanical properties
Masoud Ramezanpour, Behzad Pourabbas
Abstract
Abstract In 3D printing technology, unwanted resin properties such as low mechanical, thermal, electrical, and biocompatibility can be enhanced by using proper fillers. In this study, sucrose urethane microparticles, acrylic modified are used to improve the properties of the final object without losing other properties such as printing resolution. Modification is confirmed by FTIR spectroscopy and hydrogen bonding index enhancement after modification of the urethane filler. Filler particles are reduced in sizes by modification followed by ball‐milling as is confirmed by scanning electron microscopy. When the filler content is 2.5 wt%, mechanical tensile and flexural modulus increase compared to the neat resin however, increases the brittleness of the photo‐cured samples. Thermal degradation temperature is lifted up for 2.5–5.0 wt% of the filler loading in the resin. Improved dimensional accuracy and detailed printing in higher resolution, due to the physical effect of the filler particles, can also be achieved in real 3D‐printed object as is explored. Highlights High‐resolution 3D printing, by random geometry of filler particles in the resin. Scattering from polyurethane foam microparticles lead to high‐resolution printing. Acrylate‐modified polyurethane filler particles provide resin compatibility. Polyurethane filler leads to higher resolution with enhanced mechanical properties.