Preparation of Delaminated Nano-Kaolinite by Intercalation of Chemical Assistants
A process for preparing of the delaminated kaolinite was developed with intercalation of hydrazine, urea or potassium acetate followed by removing the chemical assistants. Delaminated kaolinite was characterized by XRD, solid-state NMR, thermal analyses, particle-size distribution analyses, etc. The particle size was reduced to ca. 440 nm in diameter and ca.15 nm in thickness in contrast to about 7 μm and 800 nm for untreated precursor respectively. The dehydroxylation temperature of kaolinite was shifted from 514°C to 490°C by the delamination. Additionally, a greater mass lost was also observed for the delaminated particles by dehydroxylation.
Masayuki Nogami, Riguang Jin, Toshihiro Kasuga and Wantai Yang
M. N. Niu and C. X. Guo, "Preparation of Delaminated Nano-Kaolinite by Intercalation of Chemical Assistants", Advanced Materials Research, Vols. 11-12, pp. 441-444, 2006