Method for preparing flame retardant through coating carbon microsphere with magnesium hydroxide

Abstract

The invention relates to a method for preparing a flame retardant through coating carbon microspheres with magnesium hydroxide. Aiming at the disadvantages of magnesium hydroxide in the flame retardant and combining the characteristic of thermal stability of the carbon microspheres, the method is characterized in that the carbon microspheres are coated with magnesium hydroxide so as to produce the flame retardant; the carbon microspheres are made of glucose; magnesium chloride generates magnesium hydroxide in an alkaline environment and conducts coating, and through the treatment of ultrasonic dispersion, pH value regulation, washing, suction filtration, vacuum drying, grinding and screening, the product of magnesium hydroxide coated carbon microsphere flame retardant powder particles can be obtained. The method is advanced in technology and full and accurate in data; the product is black gray powder particles which are 500 to 650 nm in diameter, the thickness of a coating layer is 15 to 50 nm, the purity is as high as 97%, and the flame-retardant effect is good; the method can be applied to textile, dye printing and a plurality of industrial fields and is a very ideal method for preparing the flame retardant through coating the carbon microsphere with magnesium hydroxide.

Description

technical field [0001] The invention relates to a preparation method of a magnesium hydroxide-coated carbon microsphere flame retardant, which belongs to the technical field of preparation and application of inorganic flame retardant materials. Background technique [0002] In recent years, fire accidents have occurred frequently in the world and all over China, so flame retardant technology has become a research hotspot. Its flame retardants tend to be halogen-free, flame-retardant and ultra-fine, and smoke-suppressing. Therefore, nano-flame retardants are subject to people's attention. [0003] Magnesium hydroxide is a chemical filler with the functions of filling, flame retardant and smoke suppression. Its smoke is non-toxic and non-corrosive. It is a green flame-retardant material. The magnesium oxide produced by its decomposition is a good refractory material with extremely With a large surface area, it can absorb smoke and combustibles, and has a smoke-eliminating eff...

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Problems solved by technology

[0004] Carbon microspheres have unique structural characteristics and superior chemical stability, thermal stability, and electrical and thermal conductivity. They are used as flame-retardant materials and can achieve good flame-retardant effects with only a small amount of addition, but their maximum The disadvantage is that the particle-type smoke produced during the combustion process is relatively large

[0005] If magnesium hydroxide is used to coat carbon microspheres to make a composite flame retardant, it can not only improve and expand the smoke suppression and flame retardant effect of magnesium hydroxide, but also reduce the amount of flame retardant added, and at the same time make carbon microspheres The synergistic flame retardancy can be brought into play, so the combination of the two is a superior match, but there are few studies in this area, and there are few reports at home and abroad.

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