Efficient preparation method of ultrafine magnesium hydroxide modified by in-situ silicone polyether

In the field of chemical materials, magnesium hydroxide is widely used as a flame retardant, adsorbent and catalyst due to its unique physical and chemical properties. However, traditional magnesium hydroxide materials have some limitations in applications, such as poor filtration performance and insufficient thermal stability. In order to overcome these problems, we adopted an innovative preparation method - in-situ modification of ultrafine magnesium hydroxide with silica polyether to improve its performance and expand its application range.

Innovative preparation process

Our preparation method uses sodium hydroxide as the precipitant and anhydrous magnesium chloride as the raw material to prepare ultrafine magnesium hydroxide through a two-way precipitation method. The key innovation lies in the introduction of silicone polyether during the preparation process. This step organicizes the surface of magnesium hydroxide, thereby significantly improving the performance of the material.

Optimized preparation conditions

In order to achieve the best modification effect, we carefully investigated and optimized key factors such as the addition method, addition amount, reaction temperature and stirring speed of silicone polyether. The final optimal conditions were determined as follows:

How to add silicone polyether: Add silicone polyether (Mg(OH)2-Ⅱ) to the sodium hydroxide solution.

The amount of silicon polyether added: 3 grams of silicon polyether per 100 grams of magnesium hydroxide.

Reaction temperature: controlled at 60°C.

Stirring speed: Set to 800 rpm.

Under these optimal conditions, we found that the filtration performance of magnesium hydroxide slurry was significantly improved, with filtration speeds up to 4.79×10^-4 m/s.

Significant performance improvements

Through in-situ modification of silicon polyether, we successfully increased the contact angle of magnesium hydroxide, which was more than 6 times higher than that of unmodified magnesium hydroxide. This improvement not only enhances the surface properties of the material but also significantly improves its thermal stability. Fourier transform infrared spectroscopy (FT-IR) analysis confirmed that the silicone polyether was successfully adsorbed on the surface of magnesium hydroxide, while thermal analysis results also proved that the thermal stability of the modified magnesium hydroxide was significantly improved.

Broad application prospects

This ultrafine magnesium hydroxide modified in situ by silicone polyether is expected to play an important role in the fields of chemical industry, materials science and environmental protection due to its excellent performance. Its improved filtration performance and thermal stability make this material more competitive in industrial applications, while also opening up new paths for further research and development of magnesium hydroxide.

Through this innovative preparation method, we not only improve the performance of magnesium hydroxide, but also provide new possibilities for the sustainable development of chemical materials. With the continuous advancement of technology and the expansion of applications, silicon polyether in-situ modified ultrafine magnesium hydroxide is expected to exert greater potential in the future to meet the growing industrial demand.