工业氢氧化镁的表面改性研究

采用十二烷基磺酸钠改性工业氢氧化镁,研究了十二烷基磺酸钠的用量、反应温度、反应时间、搅拌速度对活化率的影响。结果表明,当十二烷基磺酸钠用量为氢氧化镁质量的2%、反应温度为80℃、反应时间0.75 h、搅拌速度为450 r/min时,改性效果最好,活化率达到90.5%。最佳条件下改性样品及未改性样品的显微镜照片表明,改性后氢氧化镁的分散性优于未改性的氢氧化镁。

Research on surface modification of industrial magnesium hydroxide

The surface modification of the industrial magnesium hydroxide with sodium dodecyl sulfate was researched,and the modified effect was characterized by the activation index. The effect of amount of sodi-um dodecyl sulfate,reaction temPerature,reaction time and stirring sPeed on the activation rate were stud-ied. The results showed that when the amount of sodium dodecyl sulfate as the 2% quality of magnesium hydroxide,the reaction temPerature was 80 ℃,reaction time was 0. 75 h,the stirring sPeed was 450 r/min,the modified effect was the best,the activation index reached 90. 5%. The modified samPle under oPtimum conditions and the unmodified samPle ’s microscoPe PhotograPhs show that the disPers-ibility of the modified magnesium hydroxide is suPerior to the unmodified magnesium hydroxide.