氢氧化镁粉体的表面改性研究

Study on the surface modification of Mg(OH)_2

主要研究了氢氧化镁的湿法表面改性的工艺过程,用浊度分析方法对改性效果进行了比较,确定了最佳工艺条件。实验结果表明:最佳改性剂为硬脂酸钠,改性剂用量为6%(质量分数),改性温度为85℃,改性时间为20 m in。同时,最佳条件下改性样品的红外光谱分析表明:最佳改性条件下,硬脂酸钠有效包覆在氢氧化镁粒子表面,使氢氧化镁表面有机化,增强了氢氧化镁粉体与有机体的亲和性,这对于制取添加型的氢氧化镁阻燃剂具有指导意义。

The process of surface modification used in Mg（OH）2 was investigated. The turbidimetry was used to evaluate the efficacy of surface modification, the optimal formation conditions of production were fixed. The experimental result shows that sodium stearate is the most excellent modifier, and dosage of modifier is 6% （mass） , and modified temperature is 85 ℃, and the modified time is 20 win. Meanwhile,the modification mechanism of Mg（OH）2 was studied by means of IR. Under the optimal conditions, Sodium stearate wrapped Mg（ OH）2 particles effectively, organised the surface of Mg（ OH）2, and toned up the appetency between Mg （ OH ） 2 powders and organisms. The study is beneficial to the production of Mg（OH） 2 as additive flame retardant.