روزنامه با شماره پیاپی سال 2004

-20

21

0

H-kenyaite was modified by interlayer surface silylation using 3-ammopropyltriethoxysilane and dodecylamine in ethanol without a pre-swelling step. Dodecylamine acts as a gallery expander and silylation catalyst. The evaporation of ethanol from the dispersion yields well-ordered silylated kenyaites with large basal spacings between 4.12 and 5.12 nm. Solid-state 29 Si MAS NMR of the silylated samples showed Q^3 and Q^4 signals as well as T^2 and T^3 signals. The increase in the relative intensity ofQ^4 for Q^3 and the appearance of T^2 and T^3 signals was attributed to the grafting of 3-ammopropyltriethoxysilane to the interlayer surface silanol groups.

Applied Clay Science:an International Journal on the Application...

2004

Applied Clay Science:an International Journal on the Application...

103037