Study On Quaternization Of γ-Chloropropyl Trimethoxy Siloxane

The fiber is the site that bacteria propagate. These microbial will stimulate people's skin and cause many skin diseases, which can effect the health. With the increase of life quality, the treatment of fiber by microbial is attended more and more.Through quaternization,we triumphantly synthesize theN, N-dimethyl-N-octadecyl propyl trimethoxy siloxane ammonium chloride (DMOPTMSA ) which the materials are y-chloropropyl trimethoxy siloxane and octadecyldimethylamine.We study of quaternization rule of y-chloropropyl trimethoxy siloxane and octadecyldimethylamine. We select four factors that can influence the reaction: temperature, time, the ratio of materials, the amount of catalyst, through orthogonal experiments , and found the following order that influence this reaction : temperatue?time>the amount of catalyst>the ratio of materials. Solvents have no effects on the quaternization conversion, but on the reaction rate. In different solvents, we found the higher the dielectric constants of solvents is, the faster the reaction rate is, but benzyl alcohol is an exception.We study the role of inorganic iodide in quaternization of y-chloropropyl trimethoxy siloxane and octadecyldimethylamine. Through analyzing qualitatively and quantitatively the deposition produced in the course of quaternization,we found that inorganic iodide is changed into inorganic chloride almost. Inorganic iodide apparently can increase the preliminary rate which is because the production ofγ-iodidpropyl trimethoxy siloxane.We study solvent effect in quaternization of y-chloropropyl trimethoxy siloxane and octadecyldimethylamine. We select isopropanol, l,2propylene glycol-1-monemethyl ether, DMSO, DMF, benzyl alcohol, nitrobenzene. In every kind of solvent, the rate is increasing with increasing of temperature. In l,2propylene glycol-1-monemethyl ether, the rate is the most sensitive to temperature. In DMSO, the rate is highest. When γ-chloropropyl trimethoxy siloxane and octadecyldimethylamine have the same mole, the rate is highest.In terms of thermodynamics, we study the quaternization of Y-chloropropyl trimethoxy siloxane and octadecyldimethylamine. With theincrease of temperature, is increasing, so the quaternization is aexothermic reaction. With the increase of rate, and is decreasing. The l,2propylene glycol-1-monemethyl ether is an exception which is because the hydrogen bond between triamine and solvent.We study the removal proficiency of un-reacted triamine by solid acid in in quaternization of y-chloropropyl trimethoxy siloxane and octadecyldimethylamine. In simulating test, we study the amount of solid acid and fix time of HZSM-5, ZRP, niobic acid, niobic acid washed by water, we found that niobic acid washed by wateris the best.