Surface Modification of Montmorillonites by Chlorosilanes  

作　　者：赵春贵 冯猛 巩方玲 阳明书 

机构地区：[1]State Key Laboratory of Engineering Plastics, Center for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences [2]Graduate School, Chinese Academy of Sciences, Beijing 100039, China

出　　处：《Chinese Journal of Chemistry》2003年第8期1031-1034,共4页中国化学（英文版）

摘　　要：Montmorillonite was modified by chlorosilane derivatives (trimethylchlorosilane and tert butyldimethylchlorosilane) bas^ed on the reaction between OH group and chlorosilane. Fourier transformed infrared spectra (FTIR) confirmed that chlorosilanes did react with the OH groups of montmorillonite. The effect of reaction time and dispersing agents on the intercalation was studied by wide angle X ray diffraction (WAXD) method. Further experiments proved that there is no reactive OH group on the surface of layers in the interlayer galleries of montmorillonite. The cation exchange capacity (CEC) of montmorillonites was measured, showing that after modification by chlorosilane derivatives, CEC values drastically decreased. The dispersibility measurements of montmorillonites were conducted, which showed that the dispersibility of modified montmorillonites both in H 2O and toluene were improved due to the decrease of attractions of particles and layers.Montmorillonite was modified by chlorosilane derivatives (trimethylchlorosilane and tert butyldimethylchlorosilane) bas^ed on the reaction between OH group and chlorosilane. Fourier transformed infrared spectra (FTIR) confirmed that chlorosilanes did react with the OH groups of montmorillonite. The effect of reaction time and dispersing agents on the intercalation was studied by wide angle X ray diffraction (WAXD) method. Further experiments proved that there is no reactive OH group on the surface of layers in the interlayer galleries of montmorillonite. The cation exchange capacity (CEC) of montmorillonites was measured, showing that after modification by chlorosilane derivatives, CEC values drastically decreased. The dispersibility measurements of montmorillonites were conducted, which showed that the dispersibility of modified montmorillonites both in H 2O and toluene were improved due to the decrease of attractions of particles and layers.

关 键 词：MONTMORILLONITE CHLOROSILANE modification DISPERSIBILITY 

分 类 号：O611[理学—无机化学]