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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。
Nanometer Mg (OH) _2 (magnesium hydroxide) is a kind of environmentally friendly and efficient halogen-free flame retardant for polymers. However, nano Mg (OH) _2 obtained by the conventional method is poorly dispersible because of its extremely easy reunion. In the presence of PEG (polyethylene glycol), magnesium chloride / HCl (HCl), NH 3 · H 2 O (ammonia) and NaOH Size of nanosheet Mg (OH) _2. The results show that the obtained products are all nanosheet-like structures, and have strong photoluminescence properties. Moreover, 1 mol / L NaOH / Mg (OH) 2,1 mol / L NH 3 · H 2 O / Mg , The thickness of 2 mol / L NH 3 · H 2 O / Mg (OH) 2 were 20, 10 and 6 nm, respectively. With the decrease of the thickness of nano Mg (OH) Shift, the emission peak intensity weakened.