A novel preparation of nanosized hexagonal Mg(OH)<sub>2</sub> as a flame retardant_中国颗粒学会

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Partic. vol. 24 pp. 177-182 (February 2016)
doi: 10.1016/j.partic.2015.01.007

A novel preparation of nanosized hexagonal Mg(OH)2 as a flame retardant

Yongbin Chen, Tao Zhou*, Huaxiong Fang, Simin Li, Yuting Yao, Bailin Fan, Jian Wang

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zhoutao@csu.edu.cn

Highlights

    • An ammonia-hydrothermal method was used to prepare hexagonal Mg(OH)2 nanoplates. • Mg(OH)2 particles with good dispersivity and uniform size distribution were prepared. • Optimum operating conditions were determined for preparing nano-sized Mg(OH)2. • Mg(OH)2 crystal growth and size were controlled by MEA concentration.

Abstract

Nanosized dispersive hexagonal magnesium hydroxide (Mg(OH)2) has been prepared using an ammonia-hydrothermal method. Citric acid and monoethanolamine (MEA) were added to the reaction system during the ammonia precipitation and hydrothermal processes, respectively, to improve the crystallinity and dispersion of the (Mg(OH)2) particles. The resulting Mg(OH)2 samples obtained under the optimum preparation conditions were characterized by scanning electron microscopy, X-ray diffraction and thermal gravity analysis, which showed that this newly developed procedure afforded well-dispersed hexagonal nanoplates of Mg(OH)2 with a mean diameter of 246 nm.

Graphical abstract

Keywords

Nanosized; Mg(OH)2; Hydrothermal process; Dispersion



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