The Preparation of Spherical Calcium Phosphate Fine Particles Using an Emulsion Liquid Membrane System

摘要: Calcium phosphate fine particles were prepared by using an emulsion liquid membrane (ELM, water-in-oil-in-water (W/O/W) emulsion) system, consisting of Span 83 (sorbitan sesquioleate) as surfactant and VA-10 (2-methyl-2-ethyl heptanoic acid) extractant (cation carrier). ions extracted from the external water phase stripped into internal containing anions, to form calcium particles. The submicrometer-sized spherical obtained characterized scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectrophotometry thermal analysis (TG-DTA). characterization revealed that calcium-deficient apatite in combination with various other species. Decomposition hydroxyapatite β-TCP (whitlokite) occurred at 973 K, treatment above 1073 K produced a CaO composite. freeze−thaw demulsification met...