正交实验优化纳米氢氧化镁复合改性工艺

Optimization of Nano-magnesium Hydroxide Composite Modification by Orthogonal Experiment

采用油酸/聚乙二醇6000对纳米Mg(OH)_2进行复合改性,通过正交实验得出最佳改性工艺条件为:油酸/聚乙二醇6000用量分别为纳米Mg(OH)_2质量的4%,1%(wt,质量分数),反应时间为30 min,反应温度为60℃,超声时间为10 min。利用接触角测试、扫描电子显微镜(SEM)、X射线衍射(XRD)、活化指数来表征改性前后纳米氢氧化镁的润湿情况、分散性、物相结构及活化程度。结果发现:改性后的纳米Mg(OH)_2与水的接触角由8°变成115°,分散性得到了很好的改善而晶型结构并未发生改变,活化程度高达99.30%。

The modification of nano-magnesium hydroxide was made by using the oil acid/polyethylene glycol 6000, and the optimum conditions of modification were obtained by orthogonal experiment： the dosage of oil acid and polyethylene glycol 6000 are 4 % and [ % （wt） of the quality of magnesium hydroxide and tile reaction time is 30 min, the reaction temperature is 60°, ultrasonic time is l0 min. The wetting, dispersion, phase structure and activation degree of nano-magnesium hydroxide before and after modified were characterized by contact angle test, scanning electron microscope （SEM）, X-ray diffraction （XRD） and activation index. It is found that the contact Angle of modified nano-magnesium hydroxide and water contact angle was changed from 8° to 115°, The dispersibility of modified magnesium hydroxide is improved well and the crystal structure isn＇t changed, and the activation degree is up to 99.30 %.