Adsorption Layer Structure Study Of Solid-liquid Interface About Cationic Gemini Surfactant

This paper studies the adsorption of cationic Gemini surfactants on quartz sand and montmorillonite, and adsorption layer morphology of solid / liquid interface about cationic Gemini surfactants in the same coupling group length but different hydrophobic chain lengths, the same hydrophobic chain lengths but different coupling group length, conventional surfactants and Gemini Surfactant in the same hydrophobic chain lengths.Determine the adsorption of cationic Gemini surfactant on quartz sand and montmorillonite. Measure the concentration of cationic Gemini surfactant solution after adsorption by titration, and calculate adsorption on quartz sand and montmorillonite by a formula, then draw absorption curve. Analyze the adsorption on quartz sand and montmorillonite about different structure cationic Gemini Surfactant. Researching the adsorption layer structure between the solid and liquid when above and less than CMC.Following conclusions of experiments: Adsorption of the cationic surfactant increases with chain length of the hydrophobic and decreases with chain length of linker. Adsorption of cationic surfactant is much smaller than conventional surfactant on the quartz sand, well roughly equal on the montmorillonite. Adsorption surface structure will changes from the nanostructures to spherical micelles structure to cylindrical micelles, while the adsorbed layer thickness decreasing trend, when the concentration is greater than the CMC. The surface adsorption layer structures of reservoir minerals are always nanostructures, when the concentration is less than the CMC. There will be a different number, forms micelle structure adsorbing to the surface of the reservoir rocks and minerals, with the formation of different surfactant micelle.