沉淀二氧化硅表面改性工艺条件优化  

Optimization for process conditions of surface modification of pecipitated silica

作　　者：崔益顺[1] 

机构地区：[1]四川理工学院材料与化学工程系,四川自贡643000

出　　处：《无机盐工业》2009年第1期24-25,28,共3页Inorganic Chemicals Industry

基　　金：四川省自贡市重点科技计划项目(08X01)

摘　　要：以硅酸钠和盐酸为原料制备二氧化硅粉体,用表面活性剂对产品进行表面改性处理。首先对改性剂进行筛选,然后借助数学软件SPSS13.0,用极差分析、方差分析和多元回归分析3种方法,分别对正交实验数据进行处理,讨论了改性温度、改性时间、改性剂用量(改性剂占二氧化硅粉体的质量分数)、异丙醇用量4个因素对产品活化指数的影响,并得出了完全一致的结果,即优化工艺方案为:改性温度85℃,改性时间120 min,改性剂A-151用量20%,异丙醇用量15 mL;在此条件下改性后产品的活化指数为35%,表现出良好的疏水性。Silica powder was prepared from sodium silicate and hydrochloric acid, and the surface of product was modified by surfactant. Firstly the modifiers were selected by sifting. Then, three statistical methods （ range analysis, variance analysis, and multiple regression analysis） were applied in data analysis of orthogonal experiments by using mathematical software SPSS13. O. Influences of four factors ,such as modifying time ,temperaure ,dosage of modifier,and dosage of isopropanol on product activation index,were discussed and the accordant results were obtained, namely, the optimal process conditions were followed by modification temperature of 85℃, modification time of 120 min, dosage of modifier A - 151 of 20% and dosage of isopropanol of 15 mL. Moreover, under these conditions, the activation index of modified product was 35%, which showed fine hydrophobic property.

关 键 词：二氧化硅 硅酸钠 盐酸 

分 类 号：TQ127.2[化学工程—无机化工]