蛇纹石酸浸滤液提镁制备针状纳米氢氧化镁

Purification of Magnesium by Sulfuric Acid Leaching Filtrate of Serpentine for Preparation of Acicular Nanometer Magnesium Hydroxide

首先考察由蛇纹石酸浸滤液所制粗硫酸镁净化后 ,制备精制硫酸镁溶液的方法 ;并以此精制硫酸镁和氨水为原料 ,直接利用表面活性剂在固 /液界面的“双亲性” ,使其吸附在新生成的氢氧化镁微粒上 ,制备纳米氢氧化镁。并采用XRD和TEM等进行表征 ,结果表明 ,样品晶型发育完善、呈针状、直径为 5～ 10nm、长径比为 15～ 2 0且分散性好。研究结果为纳米级氢氧化镁阻燃剂的深入研究提供了基础。

Study on the process of the purified of raw magnesium sulfate from the sulfuric acid leaching filtrate of serpentine is for preparing purified magnesium sulfate.Use this purified magnesium sulfate and aqueous ammonia as raw materials,the nanometer magnesium hydroxide can obtained by adding surfactant.The morphology of the powders was characterized by TEM and XRD.The exeperimental results indicate that magnesium hydroxide particles with perfect morphology and its shape is acicular with a diameter of 5～9nm,length to diameter ratio 15～20. Above research results have established good foundation for further research of nanometer magnesium hydroxide.