超细镁铝复合阻燃剂的制备与表征  

Preparation and Characterization of Superfine Magnesium Aluminum Hydroxide Composite Flame Retardants

作　　者：章胜超[1] 赵永红[1] 

机构地区：[1]中国日用化学工业研究院山西纳米技术应用工程研究中心,山西太原030001

出　　处：《中国粉体技术》2013年第3期26-29,共4页China Powder Science and Technology

基　　金：山西省太原市发明专利转化项目;编号:1211

摘　　要：采用化学共沉淀的方法,在相同的工艺条件下,固定Mg2+的浓度,通过改变Al3+的量,分别制备Mg与Al的物质的量比为5∶1、4∶1、3∶1、2∶1、1∶1的复合粉体和单一的氢氧化镁与氢氧化铝,通过X射线衍射、透射电镜、热重-差热分析、氮气吸附测定比表面积、堆密度等手段对合成样品进行表征。结果表明,合成样品为类水滑石结构Mg6Al2(OH)18.4.5H2O为主的混合物,呈现卷曲片状的形貌;Mg与Al的物质的量比为4∶1时制备的粉体为Mg(OH)2和Mg6Al2(OH)18.4.5H2O的混合物,分散性好,分解温度高,是一种优良的阻燃剂。The composite powders of Mg and Al with molar ratios of 5∶1,4∶1,3∶1,2∶1,1∶1 as well as single magnesium hydroxide and aluminum hydroxide were prepared via chemical coprecipitation method under the same processing conditions by changing the amount of Al3+ with fixed concentration of Mg2+.The samples were characterized through the means of XRD,TEM,TG-DTA,N2adsorption test specific surface area and bulk density.The results indicate that the samples show the curly sheet morphology based on hydrotalcite structure with Mg6Al2(OH)18.4.5H2O as the main content.The powders prepared at the condition that Mg and Al with molar ratio of 4∶1 are mixtures of Mg(OH)2and Mg6Al2(OH)18.4.5H2O,which have good dispersion and high decomposition temperature,and are good flame retardants.

关 键 词：超细粉体 阻燃剂 化学共沉淀 

分 类 号：TQ132.2[化学工程—无机化工]