超重力碳分法制备六角片状纳米级氢氧化铝  

Preparation of hexagonal plate nano-aluminum trihydrate by hypergravity-carbonation

作　　者：王子云[1] 邵磊[1] 郭奋[1] 陈建峰[1] 赵瑞红[1] 王东光[1] 

机构地区：[1]北京化工大学纳米材料先进制备技术及应用科学教育部重点实验室,北京100029

出　　处：《化工学报》2006年第7期1699-1703,共5页CIESC Journal

基　　金：国家高技术研究发展计划项目(2002AA302605).~~

摘　　要：以偏铝酸钠溶液、CO2为原料,在超重力旋转床反应器中进行碳分反应,成功制备出纳米级氢氧化铝,采用XRD、TEM、TGDSC、粒度分布等测试技术对产品进行表征,表明产品的晶型为拜耳石、六角片状、平均粒径<100nm,且形状规则、粒度分布窄、分散性好.同时对其合成条件进行了优化分析.结果表明,利用超重力旋转床反应器制备六角片状氢氧化铝工艺简单、重复性好、技术上是可行的.Nanosized aluminum hydroxide was prepared by carbonation in a hypergravity rotating packed bed （RPB） reactor using sodium meta-aluminate and carbon dioxide as source materials. Characterization of XRD, TEM, TG-DSC and particle size distribution indicated that the as-prepared product was bayerite with hexagonal-plate shape and particle size of less than 100 nm, which also exhibited uniform morphology, narrow particle size distribution and good dispersibility. The optimum synthesis conditions were obtained. The experimental results showed that the preparation of hexagonal-plate-shaped aluminum hydroxide by RPB is technically feasible due to its simplicity and reproducibility.

关 键 词：超重力 碳分法 纳米氢氧化铝 六角片状 拜耳石 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]