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改性纳米Al（OH）3粉体的制备
Preparation of Surface-modified Nanosized Al（OH）3 Powders
【摘要】 以铝酸钠溶液和二氧化碳气体为原料,采用碳分法制备纳米Al(OH)3粉体. 考察了原料液浓度、气液流量比、旋转填料床转速等因素对Al(OH)3粒径d50的影响. 在Al(OH)3胶体溶液中添加复合表面活性剂三乙基苄基氯化铵/磷酸钠(TEBAC/PO43-),对Al(OH)3粒子进行防团聚研究. 利用XRD和TEM等测试方法对最终产物进行了分析表征,表明所制备的Al(OH)3粒子呈单斜晶系,具有憎水性,粒度分布均匀,平均粒径20 nm.
【Abstract】 Nanosized Al(OH)3 powder was prepared by the carbonation method from sodium aluminates solution and carbon dioxide. The influence of concentration of reactant, rotating speed of rotating packed bed and ratio of gas-liquid flow rate on Al(OH)3 particle size in the preparation process was investigated. The optimal operating optimum conditions were determined as follows: sodium aluminates 120 g/L, ratio of gas-liquid flow rate 1.5~4.0, rotating speed 1200 r/min. Adding surface modifier TEBAC/PO43- is helpful to the control of agglomeration of Al(OH)3 particles. The product was characterized by TEM and XRD. The prepared particles are monoclinic and well-dispersed with a mean size of 20 nm .
【Key words】 rotating packed bed； carbonation method； nanosized aluminum hydroxide； preparation； composite surfactant； surface modification；
- 【文献出处】 过程工程学报 ,The Chinese Journal of Process Engineering , 编辑部邮箱 ,2003年01期
- 【分类号】TB44
- 【被引频次】58
- 【下载频次】392