Synthesis and Character of Amphiphobic Calcium Carbonate Nanoparticles In Situ
Amphiphobic vaterite with a size of about 50 nm, was prepared via crystallization of CaCO3 with perfluorooctane surfapropyl betaine（DF-921）in methanol by mimicking the process of biomineralization. The products were analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and contact angle analysis. The results indicate that the CaCO3 powder samples had both hydrophobic and oleophobic properties. The DF-921 used in this research not only controlled the crystal type of the CaCO3 particles but also changed the surface properties of the final products.
Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu
C. Y. Liu et al., "Synthesis and Character of Amphiphobic Calcium Carbonate Nanoparticles In Situ", Advanced Materials Research, Vols. 295-297, pp. 1675-1679, 2011