A technique for colloidal forming of Ca2P2O7 macroporous bioceramics, based on low-pressure injection molding(LPIM) of a glycerol-water slip containing Ca2P2O7 and Ca(?2PO4)2 into a plastic mold fabricated via FDM 3Dprinting,was proposed. Chemical reaction between the solid phases of the water containing slip - Ca2P2O7 andCa(?2PO4)2, resulting in brushite (CaHPO4·2H2O) formation, led to consolidation of the casting and preserved itscomplex architecture in the course of mold burning-out. Macroporous ceramics of Kelvin structure (70% macroporeswith the sizes from 2 up to 4 mm), based on a pre-defined composition with 10 wt% Ca(PO3)2 andsintered in liquid-phase regime, demonstrated a compressive strength of 1.4 ± 0.1 MPa at a density of22 ± 2%. In vitro tests on bioactivity in SBF solution, as well as on resorption of the ceramics in model solutionof citric acid, were carried out.
Colloidal forming of marcoporous calcium pyrophosphate bioceramics in 3D-printed molds.
JV RauUltimo
2020
Abstract
A technique for colloidal forming of Ca2P2O7 macroporous bioceramics, based on low-pressure injection molding(LPIM) of a glycerol-water slip containing Ca2P2O7 and Ca(?2PO4)2 into a plastic mold fabricated via FDM 3Dprinting,was proposed. Chemical reaction between the solid phases of the water containing slip - Ca2P2O7 andCa(?2PO4)2, resulting in brushite (CaHPO4·2H2O) formation, led to consolidation of the casting and preserved itscomplex architecture in the course of mold burning-out. Macroporous ceramics of Kelvin structure (70% macroporeswith the sizes from 2 up to 4 mm), based on a pre-defined composition with 10 wt% Ca(PO3)2 andsintered in liquid-phase regime, demonstrated a compressive strength of 1.4 ± 0.1 MPa at a density of22 ± 2%. In vitro tests on bioactivity in SBF solution, as well as on resorption of the ceramics in model solutionof citric acid, were carried out.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
