Preparation and Sedimentation Performance of Nano-Magnesium Hydroxide by Ultra-gravity Precipitation
Nanoscale magnesium hydroxide (Mg(OH)₂) has shown wide application potential in many fields due to its unique physical and chemical properties. However, traditional preparation methods suffer from low efficiency and unstable product quality. As a new preparation technology, the supergravity precipitation method can effectively improve the sedimentation performance and product quality of nano-magnesium hydroxide by optimizing process conditions. This article will explore the application of hypergravity precipitation method in the preparation of nano-magnesium hydroxide and how to optimize product performance by changing process parameters.
Nanomagnesium hydroxide has been widely used in plastics, rubber, coatings and other fields because of its high specific surface area, good chemical stability and excellent flame retardant properties. In order to meet the growing market demand, it is particularly important to develop an efficient and stable preparation method for nanoscale magnesium hydroxide.
The principle of hypergravity precipitation method
The hypergravity precipitation method is a technology that uses a hypergravity field to enhance the precipitation process. Under the action of the hypergravity field, the collision frequency and sedimentation speed between particles increase significantly, thereby improving the sedimentation efficiency and product quality.
Optimization of preparation process
Through single-factor experiments and orthogonal experiments, the influence of factors such as the initial concentration of magnesium ions, the molar concentration ratio of magnesium ions and hydroxide ions, rotation speed, liquid flow rate and reaction temperature on the settling performance of magnesium hydroxide slurry was studied. The experimental results show that when the initial concentration of magnesium ions is 0.70mol/L, the molar concentration ratio of magnesium ions and hydroxide ions is 1/2, the rotation speed is 900r/min, the liquid flow rate is 40L/h, and the reaction temperature is 70°C, the optimal Under optimal process conditions, hexagonal flaky magnesium hydroxide with a particle size of 60~80nm can be obtained, and its settling performance is good.
Application prospects
Flame retardant: Due to its excellent flame retardant properties, nanomagnesium hydroxide can be used as a flame retardant for plastics, rubber and other materials to improve product safety.
Catalyst: Nano-magnesium hydroxide can be used as a catalyst or catalyst carrier to improve the efficiency of chemical reactions.
Adsorbent: The high specific surface area of nanomagnesium hydroxide makes it an effective adsorbent and can be used in areas such as air purification and water treatment.
Medical field: The biocompatibility of nanomagnesium hydroxide makes it have potential application value in the medical field, such as as a drug carrier or for disease treatment.
The hypergravity precipitation method provides an efficient and stable method for the preparation of nanoscale magnesium hydroxide. By optimizing process parameters, nanomagnesium hydroxide products with uniform particle size and good settling performance can be prepared. The application of this technology is expected to further broaden the application prospects of nano-magnesium hydroxide in various fields.