Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10632074 | Materials Research Bulletin | 2005 | 9 Pages |
Abstract
Calcium carbonate (CaCO3) particles with various shapes were prepared by the reaction of sodium carbonate with calcium chloride in the presence of a new functional double-hydrophilic block copolymer poly (acrylic acid)-block-(acrylic hydroxy lactide) (PAAL) at room temperature. The as-prepared products were characterized with scanning electron microscopy and X-ray diffraction. The effects of pH, concentration of PAAL and CaCO3 on the crystal form and morphologies of the as-prepared CaCO3 were investigated. The results show that pH, concentration of PAAL and CaCO3 are important parameters for the control of morphologies of CaCO3. Depending on the experimental conditions, various morphologies of CaCO3, such as plate-like aggregates, poly-nucleated spheres, ellipsoids, monodispersed spheres, rhombohedras, etc., can be obtained. Especially, the optimal experimental conditions for the production of monodispersed spherical CaCO3 particles were determined.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
M. Lei, W.H. Tang, J.G. Yu,