在五组分溶液体系中制备碳酸钙微球

在水-十二烷基硫酸钠(SDS)-α-甲基丙烯酸(MAA)-聚乙二醇400(PEG400)-盐五组分溶液体系中制备了碳酸钙微球(中空),其粒径在0.5~1.5μm之间。并且对无表面活性剂SDS以及SDS浓度为0.2 mmol.L-1情况下制备的碳酸钙微结构进行了考察,得到了由片状粒子堆积而成的花球,直径约在0.8~3μm之间。考察了后处理条件对碳酸钙粒子的影响,后处理温度为140℃时,原来粒径小的碳酸钙微粒聚集成粒径较大的多面体稳定结构。用XRD、SEM等手段对样品进行了表征,对其形成机理进行了分析和探讨。

Synthesis of Calcium Carbonate Microsphere in a Solution System of Five Components

The calcium carbonate microsphere(hollow sphere),with a size distribution of 0.5~1.5 μm,has been synthesized in a solution system of water-sodium dodecyl sulfate(SDS)-α-methacrylic acid(MAA)-polyethylene glycol400(PEG400)-salt solute.The microstructures of calcium carbonates obtained at \=0 and \=0.2 mmol·L~(-1)were investigated.The flower spheres composed of sheet-like particles,with the diameter of about 0.8 ~3 μm,were obtained.The effects of final treatment conditions on the restuting CaCO_3 particles were examined.When the final treatment temperature was 140 ℃,the particles became steady polyhedron with a bigger size.The samples were characterized by XRD and SEM.The mechanism was analyzed and discussed.