Calcite particles formation, in the presence of soluble polyvinyl-alcohol matrix

✍ Scribed by P. Malkaj; E. Dalas; D.G. Kanellopoulou; A. Chrissanthopoulos; D. Sevastos

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 677 KB
• Volume: 177
• Category: Article
• ISSN: 0032-5910
• DOI: 10.1016/j.powtec.2007.02.012

✦ Synopsis

The kinetics of calcite particles formation in the presence of soluble polyvinyl-alcohol matrix was investigated by the constant composition method. The presence of the above-mentioned polymer, induces the precipitation of this calcium carbonate polymorph at room temperature possibly through the -OH moieties. The apparent order for the crystallization process was found to be 2.25 ± 0.16 indicative of a surface nucleation mechanism. The number of ions forming the 3D critical nucleus was found to be p = 9. The surface energy of the growing phase was 28 mJ m -2 relatively small because of imperfections, in the form of vacant sites.