How to prepare ultrafine magnesium hydroxide

    We know that magnesium hydroxide has properties such as colorless, non-toxic, odorless, and non corrosive. It is a green and environmentally friendly polymer material additive, usually used as a flame retardant. Do you know what ultrafine magnesium hydroxide is?

        We know that magnesium hydroxide has properties such as colorless, non-toxic, odorless, and non corrosive. It is a green and environmentally friendly polymer material additive, usually used as a flame retardant. Do you know what ultrafine magnesium hydroxide is?
         Magnesium hydroxide has a good sheet-like or fibrous crystal shape, which can match the raw materials well without affecting the physical properties such as strength of the raw materials, greatly improving the flexural strength and elongation of polymer materials. Therefore, magnesium hydroxide with special morphology has superior properties and wider applications. The preparation of ultrafine magnesium hydroxide using brucite as raw material has no environmental pollution and consumes less energy during the processing. Therefore, using Kuandian brucite as raw material, the preparation of ultrafine magnesium hydroxide with special morphology using magnesium chloride method and magnesium oxide method under hydrothermal conditions has certain practical significance. After testing, the purity and crystallinity of the product are both high. Using scanning electron microscopy, it was found that the product is in the form of hexagonal flakes or whiskers, with a complete crystal structure and uniform particle size. The particle size reaches the sub micron level, and the whisker diameter is several tens of nanometers, with a length of 2-5 μ M.
           After analysis and research, the following conclusions have been drawn:
           The preparation of basic magnesium chloride is one of the necessary prerequisites for producing magnesium hydroxide products with high crystallinity, uniform particles, and good dispersibility. The temperature significantly affects the growth rate of magnesium hydroxide crystals, and the magnesium hydroxide crystals prepared at 140 ℃ are the most ideal. The regular regular hexagonal crystals have an outer radius of 0.4 μ About m; The stirring speed affects the growth direction of magnesium hydroxide crystals. At around 250r/min, smooth and uniform magnesium hydroxide whiskers can be produced; In addition, within the range of 100-600r/min, magnesium hydroxide crystals crystallize in a sheet-like form; Within a certain range, the filling degree is inversely proportional to the thickness of magnesium hydroxide hexagonal flake crystals; Effectively controlled the size of magnesium hydroxide crystal particles, ensuring the integrity of its crystal form;
         2. The magnesium oxide method can effectively control the size of magnesium hydroxide crystal particles and the completeness of their crystal form, promoting the one-dimensional growth of magnesium hydroxide crystals to a certain extent. The concentration of the solution mainly affects the direction of crystal growth.
          3. The crystallinity of magnesium hydroxide products obtained by magnesium chloride method and magnesium oxide method is high, but the purity of products obtained by magnesium chloride method is higher.