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Nano-magnesium hydroxide flame-retardant material and preparation method thereof

A technology of nano-magnesium hydroxide and flame-retardant materials, applied in the direction of magnesium hydroxide, etc., can solve the problem that magnesium hydroxide flame retardants do not have lipophilic, hydrophilic and amphiphilic properties, suspension stability is not very ideal, dispersibility and compatibility Poor capacity and other problems, to achieve the effect of simple and easy preparation process, environmentally friendly preparation method, and short preparation cycle

Inactive Publication Date: 2017-06-27
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials such as tetrakis hydroxymethyl phosphorus chloride and acrylamide involved in this document will cause certain pollution to the environment, which is not environmentally friendly. At the same time, the magnesium hydroxide flame retardant does not have lipophilic, hydrophilic and amphiphilic properties.
[0007] At present, there are many methods for preparing magnesium hydroxide flame retardants. The method of preparing magnesium hydroxide flame retardants through inorganic chemical reactions is characterized by long reaction cycles and low flame retardant efficiency; Magnesium materials or flame retardants prepared by modifying the surface of magnesium hydroxide particles have poor dispersion and compatibility in filler materials, and most of their suspension stability is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] A kind of preparation method of nano-magnesium hydroxide flame retardant material, described preparation method is carried out according to the following steps:

[0020] a. Mix magnesium nitrate hexahydrate, hydrazine hydrate and deionized water at a mass ratio of 1:3:50, stir mechanically at a constant temperature of 40°C until the solution turns into a white suspension, then stop stirring, and then dissolve the obtained white The suspension is transferred to a hydrothermal reaction kettle and heated in a vacuum drying oven. The heating time is 6-24 hours, and the heating temperature is 150-180°C. After the suspension is cooled to room temperature after the reaction, it is centrifuged Obtain white magnesium hydroxide precipitate, then use deionized water and ethanol to wash magnesium hydroxide precipitate successively, until the pH=7~8 of the filtrate of washing magnesium hydroxide precipitate, the magnesium hydroxide precipitate of gained is in Magnesium hydroxide nan...

Embodiment 1

[0025] a. Mix 0.6g of magnesium nitrate hexahydrate, 1.8g of hydrazine hydrate and 30g of deionized water, and stir mechanically at a constant temperature of 40°C until the solution turns into a white suspension, then stop stirring, and then remove the resulting white suspension The liquid was transferred to a hydrothermal reaction kettle and heated in a vacuum drying oven. The heating time was 6 hours and the heating temperature was 150°C. After the reaction suspension was cooled to 25°C, it was centrifuged to obtain a white hydroxide Magnesium precipitate, then wash the magnesium hydroxide precipitate with deionized water and ethanol successively, until the pH=7~8 of the filtrate of washing magnesium hydroxide precipitate, the magnesium hydroxide precipitate of gained is vacuum dried in a vacuum oven Magnesium hydroxide nanoparticles were obtained after drying for 24 hours, and the drying temperature was 60°C.

[0026] Wherein, the hydrazine hydrate mass fraction is 85%.

[0...

Embodiment 2

[0029] a. Mix 0.6g of magnesium nitrate hexahydrate, 1.8g of hydrazine hydrate and 30g of deionized water, and stir mechanically at a constant temperature of 40°C until the solution turns into a white suspension, then stop stirring, and then remove the resulting white suspension The solution was transferred to a hydrothermal reaction kettle and heated in a vacuum drying oven. The heating time was 12 hours, and the heating temperature was 150°C. After the reaction suspension was cooled to 25°C, it was centrifuged to obtain white hydroxide Magnesium precipitate, then wash the magnesium hydroxide precipitate with deionized water and ethanol successively, until the pH=7~8 of the filtrate of washing magnesium hydroxide precipitate, the magnesium hydroxide precipitate of gained is vacuum dried in a vacuum oven Magnesium hydroxide nanoparticles were obtained after drying for 24 hours, and the drying temperature was 60°C.

[0030] Wherein, the hydrazine hydrate mass fraction is 85%. ...

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Abstract

The invention relates to a nano-magnesium hydroxide flame-retardant material and a preparation method thereof and belongs to the field of material chemistry. Thenano-magnesium hydroxide flame-retardant material is prepared by conducting modification reaction on magnesium hydroxidenanoparticles and 3-(trimethoxysilicon propyl)-dimethyl octadecyl ammonium chloride, then conducting blended reaction on the reactant and sodium polyoxyethylene nonylphenyl ether sulphate and then performing dialysis and drying. The process of preparing the nano-magnesium hydroxide flame-retardant material is simple and easy to achieve, a reaction cycle is short, and the preparation method is environmentally friendly. The prepared nano-magnesium hydroxide flame-retardant material is uniform in particle size distribution and easy to disperse. Compared with anordinarymagnesium hydroxide flame-retardant material, the nano-magnesium hydroxide flame-retardant material prepared by adopting the preparation method has oil-wet hydrophilicityand amphiphilicity,has a liquid flow like behavior under the temperature conditionof 45 DEG C or above and is high in suspension stabilityand wide in application prospect, and the flame retardant performance, filling performance and the like of the material are better than those of other ordinary magnesium hydroxide flame-retardant materials.

Description

technical field [0001] The invention relates to surface modification technology of metal nanoparticles, in particular to a nano-magnesium hydroxide flame-retardant material and a preparation method thereof, belonging to the field of material chemistry. Background technique [0002] Magnesium hydroxide is an inorganic flame retardant filler with broad application prospects. It has excellent characteristics such as non-toxicity, low smoke and so on. The surface temperature in the flame, the stable magnesium oxide generated after its decomposition can also isolate oxygen, prevent further combustion of combustibles, and will not produce secondary pollution. However, compared with halogen-containing organic flame retardants, ordinary magnesium hydroxide flame retardants must achieve a considerable flame retardant effect, and the filling amount must generally reach more than 50%, and higher suspension stability is required. Since magnesium hydroxide is a metal hydroxide, it has g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K9/04C08K3/22C01F5/20
CPCC08K9/06C01F5/20C08K3/22C08K9/04C08K9/08C08K2003/2224C08K2201/003C08K2201/011
Inventor 殷先泽黎云翁普新王罗新王桦
Owner WUHAN TEXTILE UNIV
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