乙二胺接枝硅胶的合成研究  

Synthesis Study of Ethylenediamine Grafted on Silica Gel

作　　者：范忠雷[1] 王玲慧[1] 慎金鸽[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2010年第2期83-86,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：郑州大学引进人才项目;郑州大学研究生教育支持基金

摘　　要：以氯丙基三氯硅烷为架桥剂,乙二胺为硅胶表面修饰剂,合成了乙二胺接枝硅胶材料.考察了反应温度、反应时间和乙二胺含量等因素对取代反应的影响,得到优化的反应条件为:反应温度333 K,反应时间16 h,乙二胺与CPTCS-S iO2表面氯含量的摩尔比大于9.测定了乙二胺取代反应的动力学数据,采用微分法和最小方差线性回归法处理实验数据,获得了表观动力学模型的反应级数为4.37,活化能为55.44 kJ/mol,频率因子为5.06×107h-1,并用红外谱法和性能测定验证了乙二胺在硅胶表面进行的接枝反应.The ethylenediamine-grafted silica gel（EDA/SiO2） was prepared by CPTCS as surface anchor and ethylenediamine as surface modification agent.The effects of temperature,time and ethylenediamine concentration on the substitution reaction of ethylenediamine with CPTCS-SiO2 were investigated in detail.And it was obtained that the optimal conditions were reaction temperature 333K,reaction time 16h,and n（ethylenediamine）： n（chlorine on the surface of CPTCS-SiO2） more than 9.The substitution reaction kinetics of ethylenediamine with CPTCS-SiO2 was also investigated.It was obtained that the parameters of the apparent kinetic model were reaction order 4.37,activation energy 55.44KJ/mol and frequency factor 5.06×107h-1 by the kinetics data fitted with the differentiation and minimum variance linear regression.Infrared spectroscopy and its performance show that ethylenediamine was grafted on silica gel by substitution reaction.

关 键 词：乙二胺 硅胶 接枝反应 动力学 

分 类 号：O647.3[理学—物理化学] TQ424[理学—化学]