In the study potassium titanate whiskers (PTW, K2Ti6O13) coated with nanometer calcium carbonate (C-PTW) were firstly prepared by adding carbon dioxide into the solution of calcium chloride and PTW; then coupling agent KH550 was used to modify the surface of C-PTW. The surface properties of the modified PTW were characterized by methods of SEM, EDS, XRD, FTIR spectroscopy, UV-Vis absorption spectra, and surface contact angle measurement. The results indicated that the appropriate coating ratio of CaCO3 to PTW was 0.07: 1, and that the ideal ratio of KH550 to C-PTW was 0.035: 1 by maximum settlement time. The surface of the modified C-PTW (K-C-PTW) showed excellent lipotropic properties and mobility because the surface of PTW coated by calcium carbonate possessed more hydroxyl groups than that of PTW, so the reaction between C-PTW and KH550 proceeded easier. It could be expected that the simple method may contribute to solve the problem of agglomeration for PTW in the application of composite material.
Russian Journal of Applied Chemistry – Springer Journals
Published: Jan 3, 2017
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