Preparation and Properties of Chiorosilane-modified Montmorillonites

Abstract

Abstract: Montmorillonite(MMT) was modified by chlorosilane derivatives (trimethylchlorosilane and tert-butyldimethylchlorosilane) based on the reaction between OHgroup and chlorosilane. FTIR confirmed that chlorosilane derivatives had reacted with the OHgroups of MMT, and the results of wide angle X-ray diffraction (WAXD) indicated that there was an intercalation taking place during the reaction. The CEC of montmorillonites were detected, after the modification by chlorosilane derivatives, CEC values drastically decreased. The dispersibility measurements of montmorillonites were conducted, the results declared that the dispersibility of modified montmorillonites both in H₂Oand toluene were improved due to the decrease of attractions between particles and layers.

Key words: Montmorillonite, Chlorosilane, Modification, Dispersibility

CLC Number:

O631.2

TrendMD:

ZHAO Chun-Gui, YANG Ming-Shu, FENG Meng. Preparation and Properties of Chiorosilane-modified Montmorillonites[J]. Chem. J. Chinese Universities, 2003, 24(5): 928.

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Preparation and Properties of Chiorosilane-modified Montmorillonites

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