TY - JOUR
T1 - Optimization and characterization of high-viscosity ZrO2 ceramic nanocomposite resins for supportless stereolithography
AU - Song, Se Yeon
AU - Park, Min Soo
AU - Lee, Doojin
AU - Lee, Jung Woo
AU - Yun, Ji Sun
N1 - Publisher Copyright:
© 2019
PY - 2019/10/15
Y1 - 2019/10/15
N2 - UV-curable high-viscosity ZrO2 ceramic nanocomposite resins were prepared for use in supportless stereolithography 3D printing. To improve their dispersion stability and photo-curing properties, the mixing ratio of nano- and micro-particles of ZrO2 was optimized to 70:30 by volume, and the surfaces of the mixed particles were functionalized with acrylate groups through hydrolysis and condensation of a silane coupling agent (APTMS, 3-acryloxypropyl trimethoxysilane). APTMS-coated ZrO2 ceramic particles were dispersed in mixtures of di- and tri-functional acrylate monomers with non-reactive diluents, based on interpenetrating networks. Rheological, dispersion, and photo-curing characteristics of APTMS-coated ZrO2 ceramic nanocomposite resins with 50 vol% of ceramic particles and with a high viscosity of over 20,000 cps were investigated using a rheometer, relaxation NMR, stability analyzer and photo-differential scanning calorimeter. The green bodies of the 3D-printed objects with different cross-linking densities were sintered at 1450 °C, and the cross-linking degree of the photopolymers in the sintered 3D-printed objects was optimized by analysis of the volume shrinkage, surface morphology, and density. This work widens the possibility of ceramic composite materials for supportless 3D printing, enabling fabrication of customized zirconia dental implant restorations, as an alternative to computer-aided design and computer-aided manufacturing.
AB - UV-curable high-viscosity ZrO2 ceramic nanocomposite resins were prepared for use in supportless stereolithography 3D printing. To improve their dispersion stability and photo-curing properties, the mixing ratio of nano- and micro-particles of ZrO2 was optimized to 70:30 by volume, and the surfaces of the mixed particles were functionalized with acrylate groups through hydrolysis and condensation of a silane coupling agent (APTMS, 3-acryloxypropyl trimethoxysilane). APTMS-coated ZrO2 ceramic particles were dispersed in mixtures of di- and tri-functional acrylate monomers with non-reactive diluents, based on interpenetrating networks. Rheological, dispersion, and photo-curing characteristics of APTMS-coated ZrO2 ceramic nanocomposite resins with 50 vol% of ceramic particles and with a high viscosity of over 20,000 cps were investigated using a rheometer, relaxation NMR, stability analyzer and photo-differential scanning calorimeter. The green bodies of the 3D-printed objects with different cross-linking densities were sintered at 1450 °C, and the cross-linking degree of the photopolymers in the sintered 3D-printed objects was optimized by analysis of the volume shrinkage, surface morphology, and density. This work widens the possibility of ceramic composite materials for supportless 3D printing, enabling fabrication of customized zirconia dental implant restorations, as an alternative to computer-aided design and computer-aided manufacturing.
KW - High viscosity
KW - Nanocomposites
KW - Polymer networks structures
KW - Polymerization
KW - Stereolithography
UR - http://www.scopus.com/inward/record.url?scp=85068070773&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2019.107960
DO - 10.1016/j.matdes.2019.107960
M3 - Article
AN - SCOPUS:85068070773
SN - 0264-1275
VL - 180
JO - Materials and Design
JF - Materials and Design
M1 - 107960
ER -