Precipitation of nano-magnesium hydroxide from bittern using ultrasound irradiation

Fiber and platelet-like Nano-sized Mg (OH)2 particles were synthesized by precipitation of Magnesium rich Bitten 73 g/L Mg2+ and ammonia water as precipitator. The influence of aging process on Mg (OH)2 suspension was investigated. The aid of ultrasonic irradiation was studied via synthesis of Mg (OH)2 one-step precipitation reaction. The morphology and properties of the product was analyzed by X-ray diffraction, scanning electron microscope SEM, Fourier transform infrared spectroscopy FT-IR. Thermal analysis TGA –TDA assisted the high decomposition of Mg(OH)2 which can be used as green flame retardant filler. The results showed Mg(OH)2 particles with fiber-like morphology and platelet morphology were obtained with ammonium as precipitator and product was intensively modified by aging process and/or ultrasound waves which increased the surface area and decreased the particle size of Mg(OH)2. Moreover Ultrasound irradiation demonstrated to be a simple and fast method to assist preparation of high crystalline Mg(OH)2 .The Nano-crystals size was verified with Transmittance electron microscope TEM. The high resolution electron microscope verified the morphology of the Nano-crystal powder

Author(s): Sh. El Rafie and M. S. Mohamed

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