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In situ synthesis and modification of calcium carbonate nanoparticles via a bobbling method

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Abstract

Modified calcium carbonate (CaCO3) nanoparticles with cubic- and spindle-like configuration were synthesized in situ by the typical bobbling (gas-liquid-solid) method. The modifiers, such as sodium stearate, octadecyl dihydrogen phosphate (ODP) and oleic acid (OA), were used to obtain hydrophobic nanoparticles. The different modification effects of the modifiers were investigated by measuring the active ratio, whiteness and the contact angle. Moreover, transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetry analysis (TGA analysis) were employed to characterize the obtained products. A preliminary reaction mechanism was discussed. According to the results, the active ratio of CaCO3 modified by ODP was ca. 99.9% and the value of whiteness was 97.3% when the dosage of modifiers reached 2%. The contact angle was 122.25° for the CaCO3 modified in the presence of sodium stearate, ODP and OA. When modified CaCO3 was filled into PVC, the mechanical properties of products were improved greatly such as rupture intensity, pull intensity and fuse temperature. The compatibility and affinity between the modified CaCO3 nanoparticles and the organic matrixes were greatly improved.

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Authors and Affiliations

  1. College of Chemistry, Jilin Normal University, Siping, 136000, China

    LiNa Zhao & JingDong Feng

  2. Institute of Chemistry, Jilin University, Changchun, 130023, China

    LiNa Zhao & ZiChen Wang

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  1. LiNa Zhao
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  2. JingDong Feng
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  3. ZiChen Wang
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Correspondence to LiNa Zhao.

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Supported by the National Natural Science Foundation of China (Grant No. 50372025)

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Zhao, L., Feng, J. & Wang, Z. In situ synthesis and modification of calcium carbonate nanoparticles via a bobbling method. Sci. China Ser. B-Chem. 52, 924–929 (2009). https://doi.org/10.1007/s11426-009-0125-9

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  • DOI: https://doi.org/10.1007/s11426-009-0125-9

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