Synthesis of a Novel Class of Organosilicon Quaternary Ammonium Gemini Surfactants

A novel class of organosilicon quaternary gemini surfactants alkanediyl-, -bis(methyl-dimethoxy-silopropyl-diethyl ammonium bromide) was synthesized with N,N-diethyl-aminopropyl-methyl-dimethoxysilane and , -dibromoalkane as the raw materials, where the N,N-diethyl-aminopropyl-methyl-dimethoxysilane was synthesized by reacting diethylamine with -chloropropylmethyldimethoxysilane. The effects of various solvents on the conversion rate of the reaction and on purification of surfactants were investigated. The structures of the organosilicon quaternary ammonium gemini surfactants were determined by means of 1H NMR and elemental analysis. The properties of aqueous solution were measured with electrical conductivity and viscosity methods.