3D-printed strong hybrid materials with low shrinkage
The hybrid RBCs were assigned as P25M59N16, P30M50N20, P30M55N15, and P100M0N0, respectively, exhibiting the mass fraction ratios of the resin polymer (P), the micro-sized SiO 2 (M), and the nano-sized SiO 2 (N). All the uncured pastes were placed in a vacuum chamber for 8 h to remove air bubbles and then maintained in a refrigerator (4 °C). 2.2.
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