纳米片状氢氧化镁的制备

发布时间：2018-05-08 03:18

本文选题：无卤阻燃剂 + 水热法　；参考：《中国胶粘剂》2017年07期

【摘要】：纳米Mg(OH)_2(氢氧化镁)是一种聚合物用环保高效无卤阻燃剂,但采用常规法制得的纳米Mg(OH)_2因极易团聚而分散性较差。以氧化镁/HCl(盐酸)制备的氯化镁、NH_3·H_2O(氨水)和NaOH(氢氧化钠)为原料,在PEG(聚乙二醇)存在的情况下,采用水热法合成了3种不同尺寸的纳米片状Mg(OH)_2。研究结果表明:所得产物均为纳米片状结构,并且均具有较强的光致发光特性,而且1 mol/L NaOH/Mg(OH)_2、1 mol/L NH_3·H_2O/Mg(OH)_2、2 mol/L NH_3·H_2O/Mg(OH)_2的厚度分别为20、10、6 nm;随着纳米Mg(OH)_2片层厚度的减小,其表面极性增强,发射峰位置红移,发射峰强度减弱。
[Abstract]:Nano-MgOH-2 (magnesium hydroxide) is a kind of environmentally friendly and efficient halogen-free flame retardant for polymer, but the dispersion of nano-sized Mg(OH)_2 prepared by conventional method is poor because of its easy agglomeration. In the presence of peg (polyethylene glycol), three different sizes of nano-sized MgOHO _ 2 were synthesized by hydrothermal method using MgCl _ 3H _ 3H _ 2O (NH _ 3H _ 2O) and NaOH (sodium hydroxide) prepared from magnesium oxide / HCl (hydrochloric acid) as raw materials. The results show that all the products are nanoflake and have strong photoluminescence properties, and the surface polarity of 1 mol/L NaOH / MgOHO / 1 mol/L NH_3 H _ 2O / MgO _ 2O _ 2 mol/L NH_3 H_2O/Mg(OH)_2 is 20 ~ 1010 ~ 6 nm, respectively, and the surface polarity increases with the decrease of the thickness of nanocrystalline Mg(OH)_2. The position of the emission peak is red-shifted and the intensity of the emission peak is weakened.
【作者单位】：渭南师范学院化学与材料学院;
【基金】：陕西省教育厅专项科研计划项目(16JK1270) 渭南师范学院教育科学研究项目(2016JYKX005)
【分类号】：TQ132.2;TQ314.248

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