环氧型有机硅季铵盐的合成及性能

Synthesis and properties of organosilicon quaternary ammonium with epoxy group

合成了含有环氧基团的有机硅季铵盐二乙基-2,3-环氧丙基-[3-(甲基二甲氧基)]硅丙基氯化铵(DEEPSAC),研究了该化合物的表面性能及抗菌性能,表面张力的测定表明该化合物具有很好的表面活性,测得其临界胶束浓度为2.6mmol/L;平板计数实验表明DEEPSAC浓度为0.10%时对大肠杆菌的抑菌率达100%。动力学研究表明,DEEPSAC的合成反应并不符合通常季铵化反应的二级反应规律,反应级数和速率受温度及体系极性的影响,温度较低时呈现阶段反应的特点。

Diethyl-2, 3-epoxypropyl-[3-methyl-dimethoxyl）]silpropyl ammonium chloride（DEEPSAC）was synthesized and its properties such as surface-activity and anti-bacterial ability were studied. The surface tension measurement showed DEEPSAC has obvious surface activity and the critical micelle concentration is 2. 6mmol/L. The plate count method experiments showed that DEEPSAC had 100% antibacterial rate against escherichia coil at the concentration of 0. 10%. Kinetic studies indicated that the quaternization reaction series was not in accordence with the traditional second-order and influenced by temperature, as well as DEEPSAC concentrations.