纳米硅酸铝粉体制备及影响因素分析  

Influential Factors in Preparation of Aluminum Silicate Nanoparticles

作　　者：李辽沙[1] 李洪花[1] 王梅[1] 朱静[1] 董元篪[1] 

机构地区：[1]安徽工业大学安徽省冶金工程与资源综合利用重点实验室,安徽马鞍山243002

出　　处：《过程工程学报》2007年第3期546-550,共5页The Chinese Journal of Process Engineering

基　　金：安徽省自然科学基金资助项目(编号:050450105)

摘　　要：以含铝工业废液为原料,通过控制反应条件与添加适当的表面修饰剂制备得到纳米级硅酸铝粉体.采用化学分析、SEM、比表面积测定、分光光度测定等手段对样品的理化特性进行了表征.结果表明,加料与混合方式是影响目标产品性质的关键因素.以向水玻璃中滴加废液的方式进行反应,并控制陈化pH值为4.5左右,所得的样品颗粒粒径分布均匀,且各项化学指标均符合中国企业通用标准.修饰剂PEG和Tween-80通过空间位阻作用都能防止颗粒的团聚,但添加Tween-80更佳,其用量为0.9%(占最终干燥样品的质量百分数).终极样品的平均粒径为40～50nm,比表面积约达330m2/g.Aluminum silicate nanoparticles were prepared from aluminum-bearing waste liquids by controlling reaction conditions with addition of the surfactants as modifiers. The properties of the product were studied with chemical analysis, SEM, specific surface area measurement, spectrophotometric method, etc. The result showed that addition mode is a key influential factor for the performances of the product. When the waste liquid was added to the water glass, and the aging pH value of the solution was adjusted to 4.5, the product could reach up to the current enterprise standard of China, and the size distribution of particles became homogenous. Aggregation of the particles was effectively prohibited by adding polyethylene glycol and Tween-80 through steric stabilization function. But Tween-80 was more effective, and the suitable adding amount was around 0.9% （in mass percentage of the dry sample finally）. The mean diameter of the products was about 40-50 nm, and the specific surface area was about 330 m^2/g.

关 键 词：纳米硅酸铝 含铝废液 制备 影响因素 

分 类 号：TQ170.7[化学工程—硅酸盐工业]