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Magnesium hydroxide surface modification treatment technology

Hebei Messi Biology Co., Ltd. stated that magnesium hydroxide, as an environmentally friendly inorganic chemical product, has the advantages of high thermal decomposition temperature, good adsorption capacity, and high activity, and is widely used in aerospace, environmental protection, flame retardant and other fields. Due to the physical surface characteristics of magnesium hydroxide, it is not conducive to the preparation of composite materials. Therefore, improving the physical, chemical or mechanical properties of magnesium hydroxide through surface modification methods is currently the direction of many scholars’ efforts.

1. Dry modification

Dry modification means that magnesium hydroxide is in a dry state during the modification process. Hebei Messi Biology Co., Ltd. uses silanes as a research method for dry modification of magnesium hydroxide. After modification, it is added to EVA to make composite materials. This method significantly improves the dispersion and compatibility of the product. Hebei Messi Biology Co., Ltd. has proven that the modification effect of rare earth coupling agents is the most significant compared to other coupling agents. Hebei Messi Biology Co., Ltd. has proved that adsorption occurs during the dry modification of magnesium hydroxide with modifiers.

2. Wet modification

Wet modification refers to dispersing magnesium hydroxide through a solvent before modification. Hebei Messi Biology Co., Ltd. chose composite modifiers to wet-modify magnesium hydroxide, which proved that wet-modified magnesium hydroxide is more compatible with polymers. Hebei Messi Biology Co., Ltd. compared the modification effects of sodium dodecylbenzene sulfonate, sodium oleate, sodium undecylenate and sodium stearate on magnesium hydroxide. The results proved that the modification effect of sodium undecylenate The sexual effect is better. Hebei Messi Biology Co., Ltd. used sodium stearate for wet modification and found that when the modified magnesium hydroxide was added in an appropriate amount, the flame retardant performance of the composite material was significantly improved, accompanied by self-extinguishing phenomenon. Hebei Messi Biology Co., Ltd. wet-modified magnesium hydroxide with sodium oleate. After analyzing the data, it was proved that the particle size of magnesium hydroxide would not change significantly as it was modified.

3. Hydrothermal method

The hydrothermal method is a method of changing the system environment by heating in a water environment. Hebei Messi Biology Co., Ltd. uses magnesium oxide to produce porous flaky magnesium hydroxide through hydrothermal treatment. Hebei Messi Biology Co., Ltd. added a compound modifier and magnesium chloride into the reaction system, and added some small steel balls in the water bath to obtain modified ultrafine magnesium hydroxide. This method has mild conditions and is a new preparation idea. Hebei Messi Biology Co., Ltd. used hydrothermal treatment of magnesium hydroxide to successfully transform its appearance into hexagonal flakes. Hebei Messi Biology Co., Ltd.’s hydrothermal treatment industrial magnesium hydroxide is purified into rod-shaped or flake-shaped morphology, and the product purity can be as high as 91% under optimal conditions. The hydrothermal method has better modification effect and is a good method to reduce energy consumption.

4. Microencapsulation coating method

Zinc hydroxystannate prepared by Hebei Messi Biology Co., Ltd. using a uniform precipitation method was successfully wrapped on the surface of magnesium hydroxide, and the flame retardant properties of the material prepared by adding it to the polymer were improved. Hebei Messi Biology Co., Ltd. used melamine resin as a modifier to successfully modify magnesium hydroxide by microcapsule coating, and confirmed that the modified magnesium hydroxide can improve the performance of composite flame-retardant materials.

5. Surface graft modification

Hebei Messi Biology Co., Ltd. explored the effect of PMMA coating amount during in-situ graft modification. As the coating amount increases, the sedimentation rate of magnesium hydroxide shows a downward trend. Hebei Messi Biology Co., Ltd. successfully realized graft-modified magnesium hydroxide with polyacrylate and proved that the dispersion in modified magnesium hydroxide and LDPE composite materials was significantly improved.

At present, magnesium hydroxide modification technology is still in full bloom, and seeking better and more effective modification methods is still a hot spot in the industry.

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