以硫酸镁和氢氧化钠为主要原料,用化学沉淀法在硅油-水体系中制备氢氧化镁阻燃剂,用X射线衍射(XRD)、透射电镜(TEM)、傅里叶变换红外光谱(FT-IR)和热重分析仪(TGA)对产物的形貌、粒径、晶型结构和热稳定性进行表征,研究了反应时间、温度、搅拌速度.盐和碱溶液浓度、加料方式等因素对氢氧化镁形貌和分解温度的影响.结果表明:当反应时间为6 h,反应温度为60℃、搅拌速度为1500 r/min时,制得质量和性能较好的纳米氢氧化镁.
Magnesium hydroxide nanoparticles as a flame retardant was prepared by chemical pre-cipitation method with magnesium sulfate and sodium hydroxide as the main raw materials in silicone oil/water mixture, the obtained magnesium hydroxide was characterized in terms of morphology, particle size and crystal structure by transmission electron microscopy (TEM), Fourier transform infrared spec-troscopy (FT-IR) and X-ray power diffraction (XRD), and thermal stability by thermogravimetric analyses (TGA).The influence of reaction time, temperature, mixing rate, salt and base concentration and feed method etc. on the morphologies and decomposition temperatures of magnesium hydroxide was investi-gated. Results show when the reaction time was 6 h and the reaction temperature was 60 ℃, the mixing rate was 1500 r/min, the quality and performances of the prepared magnesium hydroxide were better.
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