Nano magnesium hydrate combustion inhibitor using agustite as crystal nucleon component and preparation method

A technology of nano-magnesium hydroxide and apatite, applied in the field of nano-magnesium hydroxide and its preparation

Inactive Publication Date: 2008-10-15
应急管理部四川消防研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore the present invention uses apatite as the crystal nucleus component of nano-magnesium hydroxide, which not only helps the high dispersion of the obtained product, solves the problem that the current conventional nano-magnesium hydroxide is easy to agglomerate into larger particle sizes, but also It is beneficial to further improve the flame retardant performance and effect

Method used

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  • Nano magnesium hydrate combustion inhibitor using agustite as crystal nucleon component and preparation method
  • Nano magnesium hydrate combustion inhibitor using agustite as crystal nucleon component and preparation method
  • Nano magnesium hydrate combustion inhibitor using agustite as crystal nucleon component and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] At room temperature, add 1.67g of calcium chloride to 150ml of ammonia solution and mix well to form a uniform solution (pH 10), add 0.21g of sodium dodecylbenzenesulfonate and mix well to form solution A. Fully dissolve 6.09g of magnesium chloride hexahydrate in 120ml of deionized water to obtain uniform transparent solution B. Dissolve 0.08g of sodium phosphate in 10ml of deionized water and mix well to obtain a transparent solution C. Add solution C dropwise to solution A at room temperature and fully stirred at a rate of 15-25 drops / min, and then add solution B dropwise to the reaction system at a rate of 30-35 drops / min, and stir vigorously (300-350 RPM) for 2 hours, aged at room temperature for 12 hours, filtered, washed with deionized water to a pH of about 6.5, and dried at 120°C for 8 hours to obtain a nano-magnesium hydroxide flame retardant with apatite as the crystal nucleus.

Embodiment 2

[0025] At room temperature, add 10.62g of calcium nitrate to 150ml of ammonia solution to form a uniform solution with pH 11, add 0.33g of sodium lauryl sulfate and stir well to form solution A. Dissolve 18.43g of magnesium nitrate hexahydrate in 120ml of deionized water to prepare uniform transparent solution B. Dissolve 3.54g of dipotassium hydrogen phosphate in 13ml of deionized water to prepare a uniform and transparent solution C. Add solution C dropwise to solution A at room temperature with stirring at a rate of 15-25 drops / min, and then add solution B dropwise at a rate of 30-35 drops / min and stir vigorously (300-350 rpm)2 After 12 hours, age at room temperature for 12 hours, filter, wash with deionized water to a pH of about 6.5, and dry at 120°C for 8 hours to obtain a nano-magnesium hydroxide flame retardant with apatite as the crystal nucleus.

[0026] The thermogravimetric (TG) curve analysis test result of above-mentioned product and comparative example product ...

Embodiment 3

[0030] Add 3.3g of calcium chloride to 150ml of ammonia solution at room temperature to form a uniform solution (pH 13), add 0.26g of OP-10 anionic surfactant and stir well to form solution A. Dissolve 12.64g of magnesium chloride hexahydrate in 120ml of deionized water to prepare uniform transparent solution B. Dissolve 0.14g of sodium phosphate in 10ml of deionized water to prepare a homogeneous and transparent solution C. Add solution C and solution B dropwise to the reaction system according to the method of the above-mentioned Example 1 under room temperature and stirring, stir vigorously (300-350 rpm) and react for 2 hours, then age at room temperature for 12 hours, filter, and deionized water Wash until the pH is about 6.5, and dry in an oven at 120°C for 8 hours to obtain a nano-magnesium hydroxide flame retardant with apatite as the crystal nucleus.

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Abstract

The invention relates to nanometer magnesium hydroxide flame retardant with apatite as crystal nucleus composition, wherein the proportion of apatite composition and magnesium hydroxide composition which are respectively calculated with the molar weight of calcium and magnesium is (1-3):(3-6). A preparation method of the invention comprises the following steps that: under the condition of sufficient stirring, a phosphate aqueous solution and a magnesium salt solution are added to an aqueous solution which has the pH value between 10 and 13 and comprises calcium salt and surfactant composition so as to carry out reaction; the proportion of calcium salt and magnesium salt which are calculated with the molar weight of calcium and magnesium is (1-3):(3-6); the proportion of magnesium salt and phosphate which are calculated with the molar weight of magnesium and phosphorus is (27-72):(0.5-1); the solution is precipitated after reaction for sufficient crystallization, and then crystal is precipitated and separated, thus a product can be obtained. The flame retardant has good dispersity in solution, and the thermogravimetric curve analysis shows that the flame retardant is wider in thermal decomposition range, faster to release water at high temperature than ordinary Mg(OH)2, capable of decomposing more water and good in flame retarding effect. The preparation method is simple, moderate in reaction conditions, high in magnesium hydroxide, suitable for industrial production.

Description

technical field [0001] The invention relates to a composite nano-inorganic flame retardant and a preparation method thereof, in particular to nano-magnesium hydroxide with an apatite component as a crystal nucleus and a preparation method thereof. Background technique [0002] As a flame retardant to solve the problem of flammability of synthetic materials, the proportion of inorganic components has exceeded 50%. In recent years, it has been found that more than 80% of fatal accidents in fires are caused by dense smoke and toxic gases produced by materials. Therefore, for flame retardants, in addition to flame retardant efficiency, low toxicity and low smoke have become a must. It is an indispensable indicator, and it is one of the most active research topics in the field of flame retardant research in recent years. [0003] Magnesium hydroxide is an inorganic additive flame retardant, which can release water and absorb a large amount of latent heat when it is thermally dec...

Claims

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Application Information

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IPC IPC(8): C09K21/02
Inventor 李风张翔唐勇张帆
Owner 应急管理部四川消防研究所
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