Citation: LIU Qin-Fu, JI Yang, DU Yan-Na, LI Xiao-Guang, LIANG Peng. Characterization and Deintercalation Kinetics of Kaolinite/γ-Aminopropyltriethoxysilane Intercalation Complex[J]. Chinese Journal of Inorganic Chemistry, ;2015, (3): 501-508. doi: 10.11862/CJIC.2015.096 shu

Characterization and Deintercalation Kinetics of Kaolinite/γ-Aminopropyltriethoxysilane Intercalation Complex

1.
College of Geoscience and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China

Corresponding author: LIU Qin-Fu,
Received Date: 18 September 2014
Available Online: 13 December 2014
Fund Project: 国家自然科学基金重点项目(No.51034006)资助。 (No.51034006)

The kaolinite/γ-aminopropyltriethoxysilane (K/APTES) was prepared with a direct displacement intercalation method by using kaolinite/methanol intercalation complex as an intermediate.The samples were characterized by using X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, and TEM analysis.Analysis suggested that the amidogen of APTES forms hydrogen bonds with tetrahedron siloxane and interlayer methoxy group of the kaolinite/methanol intercalation complex. The APTES molecules are arranged in double layer aslant between the kaolinite layers, and the inclination angle is related to the temperature. Because of hydrogen bonds are broken by APTES, the K/APTES intercalation compound appears clear scroll and exfoliation. The kinetic triplet of APTES' deintercalation from K/APTES intercalation complex was calculated by Satava integral method and Achar-Brindley-Sharp-Wendworth differential method. The activation energy E is 197.8 kJ·mol^-1, the logarithm of pre-exponential factor lg(A/s^-1) is 14.60. The mechanism function is G(α)=α+(1-α)ln(1-α) and f(α)=[-ln(1-α)]^-1.
- kaolinite;γ-aminopropyltriethoxysilane;intercalation;kinetic
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