Crystal Research and Technology
Cryst. Res. Technol. 41, 967 (2006) - Abstract -

Morphologies of calcium carbonate crystallites grown from aqueous solutions containing polyethylene glycol

An-Jian Xie, Chun-Yan Zhang, Yu-Hua Shen, Ling-Guang Qiu, Pei-Pei Xiao, and Zhao-Yang Hu

School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, China

Keywords calcium carbonate, PEG, morphology
PACS 68.37.Hk
DOI 10.1002/crat.200610706

Calcium Carbonate has been precipitated from aqueous solutions containing different concentrations and different molecular weight of Polyethylene Glycol (PEG). The precipitations were analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The results demonstrated that PEG has profound influence on the nucleation and crystal growth of CaCO3, under condition of low PEG6000 (refer to PEG MW =6000) concentration, it favored the formation of calcite, while high PEG6000 concentration promoted vaterite formation. Additionally, low molecular weight PEG can stabilize vaterite phase.




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