撞击流反应器法纳米白炭黑的制备  

Preparation of nanometer silica in impinging streams reactor

作　　者：周玉新[1,2] 魏新宇[1,2] 刘朝霞[1,2] 郭嘉[1,2] 

机构地区：[1]武汉工程大学化工与制药学院,湖北武汉430074 [2]绿色化工过程教育部重点实验室(武汉工程大学),湖北武汉430074

出　　处：《武汉工程大学学报》2015年第7期1-4,15,共5页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金项目(21076165)

摘　　要：在浸没循环撞击流反应器中,以九水硅酸钠和硫酸为原料,以表面活性剂十六烷基三甲基溴化铵(CTAB)为分散剂,采用反应-沉淀法制备纳米白炭黑.确定了制备纳米白炭黑的适宜工艺条件:硅酸钠浓度为0.3 mol/L,硫酸的质量浓度为20%,反应终点p H为5,螺旋桨转速为800 r/min,反应时间70 min,CTAB添加量为0.4g/L.采用T透射电子显微镜对产品进行表征,纳米白炭黑近似球型,粒径为11 nm左右且分散性较好,纯度高,收率达到98%以上.实验所制得纳米白炭黑产品达到2010版中国药典的医药级标准.In the submerged circulating impinging stream reactor, nano silica was prepared by the reactionprecipitate method. Nine water sodium silicate and sulfuric acid were used as raw materials, and cetyltrimethylammonium bromide（CTAB） was used as a dispersant. The optimal technical conditions to prepare nano silica are the concentration of sodium silicate of 0.3 mol/L, the concentration of sulfuric acid of20 %, the p H 5 of reaction ends, the rotational speed of propeller of 800 r /min, the reaction time of70 mins, and the addition amount of CTAB of 0.4 g/L. The prepared nano silica was characterized by transmission electron microscope. The nano silica is approximately spherical in shape, and its particle size is about11 nm, meanwhile it has good dispersion and high purity with product yield over 98%. The nano silica meets2010 pharmaceutical stand.

关 键 词：撞击流反应器 反应-沉淀法 纳米白炭黑 

分 类 号：TB383[一般工业技术—材料科学与工程]