Peanut-shaped aggregation of CaCO3 crystallites in the presence of an amphiphilic derivative of carboxymethylchitosan
Huang, Y; Shen, Q; Sui, W; Guo, M; Zhao, Y; Wang, D; Xu, D
| HERO ID | 4854511 |
|---|---|
| In Press | No |
| Year | 2007 |
| Title | Peanut-shaped aggregation of CaCO3 crystallites in the presence of an amphiphilic derivative of carboxymethylchitosan |
| Authors | Huang, Y; Shen, Q; Sui, W; Guo, M; Zhao, Y; Wang, D; Xu, D |
| Journal | Colloid and Polymer Science |
| Volume | 285 |
| Issue | 6 |
| Page Numbers | 641-647 |
| Abstract | An amphiphilic derivative of carboxymethylchitosan (CMCS), (2-hydroxyl-3-butoxyl)propyl-CMCS (HBP-CMCS), was used as an organic additive in the precipitation process of calcium carbonate (CaCO3). HBP-CMCS molecules can interact with calcium ions, the functional groups of which act as active sites for the nucleation and crystallization of CaCO3. Simultaneously, HBP-CMCS molecule also functionalizes as a colloidal stabilizer to prohibit the sedimentation of the grown CaCO3 crystals, depending upon the molar ratio of the initial Ca2+ ions to the repeat units of HBP-CMCS molecules. The combination investigations of scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy on the precipitated CaCO3 crystals proved that concentrations of HBP-CMCS and Ca2+ exert great influence on the crystallization habit of CaCO3, such as the nucleation, growth, morphology, crystal form, etc. The formation of the peanut-shaped CaCO3 particles suggests the template effect of HBP-CMCS molecules on the aggregation behavior of CaCO3 nanocrystals. |
| Doi | 10.1007/s00396-006-1606-4 |
| Wosid | WOS:000244780600004 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | calcim carbonate; crystallization; chitosan derivative; template effect; peanut-shaped aggregates |