Synthesis of CaO-P2O5-SiO2 Monolithic with Double Pore Structure by Peg /Starch
Porous CaO-P2O5-SiO2 monolithics with double-pore structure were prepared from tetraethoxysilane, triethylephosphate and calcium nitrate by a sol-gel method. Polyethylene glycol and starch were used as mesopore-making agent and as macropore-making agent, respectively. The porous monolithics, having mesopores with ~20 nm pore size and macropores with 7~20 μm pore size, could be formed from the removal of organic components after heated at 600°C for 2 hours. After soaked in simulated body fluid (SBF) at 37°C for 7 days, bonelike apatite was formed on the surface of the samples. The porous samples were degraded gradually in SBF solution.
Xingdong Zhang, Xudong Li, Hongsong Fan, Xuanyong Liu
H. B. Yang et al., "Synthesis of CaO-P2O5-SiO2 Monolithic with Double Pore Structure by Peg /Starch", Key Engineering Materials, Vols. 330-332, pp. 979-982, 2007