不同制备方法对纳米氢氧化镁性能的影响.pdf

化工进展
2016年第35卷第4期
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
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研究开发
不同制备方法对纳米氢氧化镁性能的影响
申红艳,刘有智,马鹏程,索奇,刘雪莉,彭云鹏,朱芝敏
(中北大学超重力化工过程山西省重点实验室,山西太原030051)
摘要:以六水氯化镁为原料,氢氧化钠为沉淀剂,分别采用正向沉淀法、反向沉淀法、双向沉淀法和超重力沉
淀法制备了纳米氢氧化镁,以沉降遠度为评价指标,考察了制备方法对氢氧化镁料浆沉降性能的影响,利用透
射电子显微镜(TEM)、纳米激光粒度分布仪、X射线衍射仪(XRD)对产物的形貌、粒径、粒径分布和品型进
行表征。结果表明,采用超重力沉淀法,氩氧化镁料浆的沉降速度明显加快,分别是正向沉淀法、反向沉淀法
双向沉淀法的4.7倍、12.4倍、2.1倍;所得氢氧化镁的分散性好,纯度高,粒度分布均匀并呈六方片状晶体
关键词:液相沉淀法;超重力;沉降;氢氧化镁;桨料
中图分类号:TQ03.39
文献标志码:A
文章编号:1000-6613(2016)04-149-05
DOI:10.16085/ ].lssn.100-6613.2016.04.029
Effect of different preparation methods on the properties of magnesium
hydroxide nanoparticles
SHEN Hongyan, LIU Youzhi, MA Pengcheng, SUO Oi, LIU ueli, PENG Yunpeng, ZHU Zhimin
( Shanxi Province Key Laboratory of High Gravity Chemical Engineering, North University of China, Taiyuan 030051
Abstract: Magnesium hydroxide nanoparticles were prepared via ordinal precipitation method, reverse
precipitation method, double precipitation method and high-gravity precipitation method using
magnesium chloride hexahydrate as raw material and sodium hydroxide as precipitant. The settling
velocity was selected as the index to investigate the effects of different preparation methods on the
settlement property of magnesium hydroxide slurry. The morphology, particle size and its distribution
and crystal phase of the samples were characterized by transmission electron microscope(TEM), laser
particle size analyzer (PSA) and X-ray diffractometer (XRD), respectively. The results showed that
the settling velocity increased evidently via high-gravity precipitation method, which was 4.7 times
12.4 times and 2. I times of that by the ordinal precipitation method, reverse precipitation method and
double precipitation method. It was also found that the samples prepared by high-gravity precipitation
method were hexagonal flake-like shape with narrow particle size distribution, high purity and good
dispersity
Key words: liquid precipitation method; high gravity; sedimentation; magnesium hydroxide; slurry
氢氧化镁作为无鹵阻燃剂,添加到聚丙烯、聚工作。
氯乙烯及不饱和树脂等高分子材料中,可以起到阻
氢氧化镁的制备方法主要有固相法、液相法和
燃与消烟的作用。其受热分解后无腐蚀性和有害性
物质生成,对环境不会造成污染,是一种绿色环保收稿日期:20150730修改日期:20151012
基金项目:国家自然科学基金项目(21376229)。
型阻燃剂,因此,国内外众多科研单位和企业都
第一作者及联系人:申红艳(1982一),女,讲师,博士研究生,主要
纷纷投入人力物力进行氢氧化镁阻燃剂的研究开发从事纳米氢氧化镁阻燃剂的研究。 E-mail shy shenhongyan(13om