影响2,4-二羟基苯甲酸铜粉体粒径的液相反应因素研究

Dimensional factors of ultrafine β-Cu in liquid reaction process

以五水硫酸铜和2,4-二羟基苯甲酸为原料,利用撞击流-旋转填料床合成了热敏性材料2,4-二羟基苯甲酸铜(β-Cu)粉体,研究了制备过程中撞击初速、转速、浓度、温度、陈化时间和干燥方式对粉体粒径的影响.结果表明,改变反应动力学参数(浓度和温度)和操作参数(转速、撞击初速等)可以控制粉体粒径的变化;粉体后处理过程中干燥导致了部分粒子间的硬团聚.通过透射电子显微镜、激光粒度分析仪以及BET对合成的粉体进行了测试表征,粉体的形貌为规则的纺锤形,比表面积为11.6265 m2/g,体积平均粒径610 nm,分布范围为0.12～5 μm,呈多峰分布.

Ultrafine β-Cu powder was synthesized by high gravity reactive precipitation method from CuSO4 · 5H2O and β-H using impinging steam-rotating packed bed. The influence of process parameters,such as impact velocity, rotational speed, concentration of solution, temperature and post-treatment conditions on the average particle size of β-Cu were investigated systematically. Both dynamic parameters and operating parameters affect gready particle size in the precipitation process. The agglomerates of the powder was formed during the drying process. The powder was characterized by TEM, BET and etc. The resuits showed that controlling operation conditions, spindle β-Cu particles with size range from 0.12 μm to 5 μm can be obtained. The average particle size of the product was 610 nm and specific surface area was 11. 6265 m^2/g.