文献类型：期刊文献

中文题名：核-壳结构纳米CaCO_3/SiO_2复合粒子的制备

英文题名：Preparation of Nanometer CaCO_3/SiO_2 Composite Particles with Core-shell Structure

作者：马翠翠[1];陈雪梅[2]

机构：[1]华东理工大学材料科学与工程学院,上海200237;[2]华东理工大学国家超细粉末工程研究中心,上海200237

年份：2010

卷号：51

期号：4

起止页码：196

中文期刊名：化学世界

外文期刊名：Chemical World

收录：北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：核-壳结构;纳米复合粒子;二氧化硅;包覆

外文关键词：core-shell structure; nanometer sized particles; silica dioxide; coating

摘要：采用在氢氧化钙碳化过程中向体系中滴加硅酸钠溶液的方法来制备核-壳结构的纳米CaCO3/SiO2复合粒子。将超细碳酸钙的制备和表面包覆改性工艺融为一体,在碳化反应的末期加入硅酸盐水溶液,通过控制碳化末期的反应及硅酸盐水解反应的进程,有效地防止了碳酸钙粒子的团聚,同时在超细碳酸钙粒子表面成膜包覆二氧化硅薄层,获得核-壳结构的CaCO3/SiO2复合颗粒。用耐酸性测试、吸油值、TEM、IR等方法对复合粒子的包覆效果、粒径大小、形貌、化学组成等做了分析和表征。
Nanometer sized CaCO_3/SiO_2 composite particles with core-shell structure were prepared by means of dripping sodium silicate to the system during carbonation of calcium hydroxide.Integrating the process of carbonation and surface-coating,adding sodium silicate at the end of the carbonation process prevented the reunion of the particles of calcium carbonate effectively and coated the particles with silicate thin film,so as to get nanometer CaCO_3/SiO_2 composite particles with core-shell structure.The stractare and properties of the particles were characterized by the measurement of acid resistance,TEM and IR.