School of Material Science & Food Engineering, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, China.
J Nanosci Nanotechnol. 2021 Oct 1;21(10):5241-5246. doi: 10.1166/jnn.2021.19332.
In this work, we describe the principle and operation of a bubble-liquid membrane reactor, and use of the reactor to prepare spherical calcium carbonate nanoparticles. The products were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and laser particle size analysis. The effects of additives to control crystal morphology, coating agents, and the stirring speed of the bubble-liquid membrane reactor were investigated. Spherical calcium carbonate nanoparticles with uniform dispersion and no agglomeration were obtained when a disodium hydrogen phosphate/ethylenediaminetetraacetic acid disodium salt mixture (1:1 mass ratio) was used as the additive, oleic acid was used as the coating agent (1.5 wt%), and the stirring speed was 5000-6000 r/min. The results indicate that the bubble-liquid membrane reactor may be suitable for continuous industrial production of calcium carbonate nanoparticles.
在这项工作中，我们描述了一种气-液膜反应器的原理和操作，并利用该反应器制备了球形碳酸钙纳米粒子。通过 X 射线衍射、傅里叶变换红外光谱、扫描电子显微镜和激光粒度分析对产物进行了表征。考察了添加剂、包覆剂和搅拌速度对晶体形貌的控制作用。当以磷酸氢二钠/乙二胺四乙酸二钠（质量比 1:1）混合物作为添加剂、油酸作为包覆剂（1.5wt%）、搅拌速度为 5000-6000r/min 时，得到了分散均匀、无团聚的球形碳酸钙纳米粒子。结果表明，气-液膜反应器可能适用于碳酸钙纳米粒子的连续工业化生产。
