Synthesis and Characteristics of Organic Bentonite Gel

1 IntroductionBentonite is composed of hydrous aluminosilicateminerals,the staple of which is montmorillonite . Mont-morillonite is a kind of layered mineral composed of twolayers of Si -Otetrahedron with alayer of Al -Ooctahe-dral in between,whose interlayeris permeated withinter-layer water and exchangeable cations .Byinsertingthe or-ganic long-chain quaternary ammoniumintothe sial inter-layer of montmorillonite ,the organic modified bentonite issynthesized. Then by the reaction between th…

Synthesis and characteristics of organic bentonite gel

The bentonite was modified using Cabentonite as a matrix and octadecyl/hexadecyl ammonium chloride as the cover agent, based on hydrothermal process. The organic gel with 5.0 Pa · s viscosity was synthesized by dispersing it into the dimethyl benzene-methyl alcohol system fully. The optimum process conditions for organic modification were that the coating agent dosage is 22 g/L, reaction time is 90 minutes and the pH value of pulp is 10. X-ray diffraction (XRD) analysis indicates that the d (001) value of the modified bentonite is 20. 532 Å. The influence of gel temperature on its viscosity characteristic was studied. By analyzing the transmssion electron microscopy (TEM) images and observing the dispersed gel, the nanometer effect of the organic gel was discussed.