化工进展2017，Vol.36Issue(3)：989-995,7.DOI:10.16085/j.issn.1000-6613.2017.03.030
碳酸钙空心微球的合成及其生成机理
Synthesis and formation mechanism of calcium carbonate hollow microspheres
郑天文 1陈雪梅1
作者信息
- 1. 华东理工大学化工学院,超细粉末国家工程研究中心,上海 200237
- 折叠
摘要
Abstract
The calcium carbonate hollow microspheres with vaterite and calcite polymorph were synthesized by the complex decomposition method of aqueous solutions Na2CO3 and CaCl2in the presence of poly(acrylic acid)(PAA)and sodium dodecyl sulfonate(SDS). The morphology,structure and polymorph of the products were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM),X-ray diffraction(XRD),and the formation mechanism of calcium carbonate hollow microspheres was discussed in detail through the study of the dynamic change of the structure and polymorph of calcium carbonate microspheres with time in the reaction process. The effects of reaction temperature,PAA and SDS concentration on the crystallization and growth of calcium carbonate were also investigated. The results showed that PAA and SDS could affect the aggregation behavior and morphology of calcium carbonate in the reaction process. Then it put forward a rarely reported formation mechanism of the hollow microspheres. Under the conditions of reaction temperature of 80℃,PAA concentration of 0.5g/L,SDS concentration of 10mmol/L and reaction time of 1h,calcium carbonate hollow microspheres with calcite and vaterite compound polymorph and particle diameters in the range of 4~7μm could be obtained.关键词
碳酸钙/空心微球/合成/结晶/聚集Key words
calcium carbonate/hollow microspheres/synthesis/crystallization/aggregation分类
化学化工引用本文复制引用
郑天文,陈雪梅..碳酸钙空心微球的合成及其生成机理[J].化工进展,2017,36(3):989-995,7.
