Preparation of magnesium hydroxide nanoparticles in silicone oil/water mixture

Chin J Mater Res

2009, Vol. 23

Issue (6): 663-667 DOI:

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Preparation of magnesium hydroxide nanoparticles in silicone oil/water mixture

LIAN Xiaonan^1;2;3 CHEN Mingcai^1;2XU Kai^1;2

1.Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Guangzhou 510650
2.Guangdong Key Laboratory of Electrical Organic Polymer Materials; Guangzhou 510650
3.Graduate School of Chinese Academy of Sciences; Beijing 100049

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LIAN Xiaonan CHEN Mingcai XU Kai . Preparation of magnesium hydroxide nanoparticles in silicone oil/water mixture. Chin J Mater Res, 2009, 23(6): 663-667.

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Abstract

Magnesium hydroxide nanoparticles as a flame retardant was prepared by chemical precipitation 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 spectroscopy (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 investigated. 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.

Key words: inorganic non--metallic materials magnesium hydroxide silicone oil morphology thermal stability

Received: 31 March 2009

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1 Qiu Longzhong, Xie Rongcai, Ding Peng, Preparation and characterization of Mg(OH)2 nanoparticles and flame–retardant property of its nanocomposites with EVA, Composite Structures, 62(3/4), 391(2003) 2 LV Jianping, QIU Longzhen, QU Baojun, Controlled growth of three morphological structures of magnesium hydroxide nanoparticles by wet precipitation method, Journal of Crystal Growth, 267(3/4), 676(2004) 3 Rothon R N, Hornsby P R, Flame retardant effects of magnesium hydroxide, Polym. Degdn. Stab., 54, 383(1996) 4 Ding Yi, Zhang Guangtao, Wu Hao, Nanoscale magnesium hydroxide and magnesium oxide powders: control over size, shape and structure via hydrothermal synthesis, Chem. Mater., 13(2), 435(2001) 5 Xiang Lan, Jin Yongcheng, Jin Yong, Hydrothermal formation of dispersive Mg(OH)2 particles in NaOH solution, Trans. Nonferrous Met. Soc. China, 2(14), 370(2004) 6 Henrist C, Mathieu J P, Vogels C, Morphological study of magnesium hydroxide nanaparticles precipitated in dilute aqueous solution, Journal of Crystal Growth, 249(1/2), 321(2003) 7 Jyh Ping Hsu, Anca Nacu P, Preparation of submicron–sized Mg(OH)2 particles through precipitation, Colloids and Surfaces A Physicochem. Eng. Aspects, 262(1/3), 220(2005) 8 Wu Huaqiang, Shao Mingwang, Gu Jiashan, Microwave-assisted synthesis of fibre–like Mg(OH)2 nanoparticles in aqueous solution at room temperature, Materials Letters, 58(16), 2166(2004) 9 Q.L.Wu, L.Xiang, Y.Jin, Influence of CaCl2 on the hydrothermal modification of Mg(OH)2, Powder Technology, 165, 100(2006) 10 WU Huijun, XIANG Lan, JIN Yongcheng, JIN Yong, Preparation of highly–dispersed Mg(OH)2 powders and influence factors, Journal of Inorganic Materials, 19(5),1181(2004) (吴会军, 向兰, 金永成, 金涌, 高分散氢氧化镁粉体的制备及其影响因素, 无机材料学报, 19(5), 1181(2004)) 11 LIU Zhaoping, YANG Yonghui, FAN Weiliu, YU Haiyun, ZHANG Weimin, ZHONG Hongmei, SUN Sixiu, Hydrothermal synthesis and morphology control of magnesium hydroxide flame retardant, Chemical World, 11, 612(2002) (刘兆平, 杨永会, 攀唯馏, 俞海云, 张卫民, 钟红梅, 孙思修, 特殊晶形貌的氢氧化镁阻燃剂的研制, 化学世界, 11, 612(2002))

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