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Volume 14
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Fang, H., Zhou, T., Chen, X., Li, S., Shen, G., & Liao, X. (2014). Controlled preparation and characterization of nano-sized hexagonal Mg(OH)2 flame retardant. Particuology, 14, 51–56. https://doi.org/10.1016/j.partic.2013.05.003
Controlled preparation and characterization of nano-sized hexagonal Mg(OH)2 flame retardant
Huaxiong Fang, Tao Zhou *, Xiangping Chen, Simin Li, Guangshan Shen, Xiaoyan Liao
Key Laboratory of Resources Chemistry of Nonferrous Metals, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
10.1016/j.partic.2013.05.003
Volume 14, June 2014, Pages 51-56
Received 28 January 2013, Revised 22 April 2013, Accepted 16 May 2013, Available online 20 July 2013.
E-mail: zhoutao@csu.edu.cn
Highlights

• Mg(OH)2 particles with good dispersivity and uniform size distribution were prepared.

• Optimal operating conditions were obtained for preparing nano-sized Mg(OH)2.

• Mg(OH)2 crystal growth direction and size were effectively controlled by PVP concentration.


Abstract

Nano-sized hexagonal magnesium hydroxide (Mg(OH)2) with good dispersibility was synthesized by a double injection-hydrothermal method, utilizing polyvinylpyrrolidone (PVP) as an additive and with optimized processing parameters. SEM and BET analysis showed that the mean particle size and specific surface area of the Mg(OH)2 particles were 174 nm and 50.77 m2/g, respectively. The FT-IR spectra and the XRD patterns showed that PVP was adsorbed on the surface of the Mg(OH)2 crystal, thus effectively limiting particle agglomeration and hindering crystal growth along the (1 0 1) plane. TGA showed a decrease in the decomposition temperature and an increase in the weight loss of the Mg(OH)2 particles due to addition of PVP.

Graphical abstract
Keywords
Mg(OH)2; Double injection-hydrothermal method; Nano-sized; PVP
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