摘要
以含氯化镁废液和氨水直接沉淀制备的工业级氢氧化镁为原料,经过水热处理制备氢氧化镁阻燃剂,重点考察以纯水、氨水、氢氧化钠和碳酸钠为水热介质对氢氧化镁晶体生长的影响.采用了扫描电镜(SEM),X射线衍射分析(XRD),全自动氮物理吸附仪(BET)和激光粒度仪等对水热改性的氢氧化镁进行表征分析,结果表明原料氢氧化镁经过水热处理后,在一定程度上都可以改善氢氧化镁晶体的形貌和团聚,其中以4.0 mol/L氢氧化钠溶液和1.0 mol/L碳酸钠溶液作为水热介质,改性后的Mg(OH)2最好.同时探讨不同水热介质下氢氧化镁晶体生长机理.
Using the common magnesium hydroxide obtained by precipitation of the wastewater containing magnesium chloride and ammonia as a raw material, the flame retardant Mg（OH）2 was produced by hydrothermal method. The influence of several hydrothermal solvents on the crystal growth of Mg（OH）2 was investigated. The hydrothermally modified products were characterized by Scanning electron microscope （SEM）, X-ray diffraction（XRD）, Laser granularity, and nitrogen adsorption（BET） measurements. The results showed that the morphology and aggregation of Mg（OH）2 crystals were improved greatly by hydrothermal solvents such as pure water, NH3·H2O, NaOH and Na2CO3; while the preferable effect was achieved in 4.0 mol/L NaOH and 1.0 mol/L Na2CO3 hydrothermal solutions. The growth mechanisms of Mg（OH）2 crystals in different hydrothermal solvents were also discussed.
出处
《浙江工业大学学报》
CAS
2007年第4期389-393,共5页
Journal of Zhejiang University of Technology
基金
浙江省科技厅重点基金资助项目(2006C21079)
关键词
水热介质
氢氧化镁
阻燃剂
hydrothermal solvent
magnesium hydroxide
flame retardant
