关键词:

微通道反应, 水热晶化, 羟基磷灰石, 纳米粉体, 套管式微通道反应器

Abstract:

Hydroxyapatite (HAP) nanopowders were prepared by the combination of chemical reaction in a tube-in-tube microchannel reactor and hydrothermal crystallization process.The influences of reactant flow rate ratio，microchannel height，hydrothermal temperature and time on the preparation of HAP nanopowders were systematically investigated.The results showed that increasing reactant flow rate ratio or decreasing microchannel height led to the decrease of the particle size of HAP nanopowders.The crystallinity and thermal stability of HAP were enhanced with the increase of hydrothermal temperature and time.The reactant flow rate ratio and hydrothermal temperature were the main factors that influenced the preparation of HAP nanopowders.The uniform，well-crystallized and rod-like HAP nanopowders with a mean particle size of about 80 nm could be prepared under the experimental conditions of reactant flow rate ratio of 5∶1，microchannel height of 250 μm，hydrothermal temperature and time of 220℃ and 4 h，respectively.

Key words:

微通道反应, 水热晶化, 羟基磷灰石, 纳米粉体, 套管式微通道反应器