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Micro-nano magnesia flame retardant and preparation method thereof

A magnesium oxide, micro-nano technology, applied in the field of nano-materials, can solve the problems of harmful gas generation and large smoke generation of flame retardants, and achieve excellent flame-retardant effects, stable chemical properties, and good smoke-suppressing effects

Active Publication Date: 2019-03-08
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a micronano magnesia flame retardant and its preparation method, thereby solving the problem that the flame retardant in the prior art has a large amount of smoke and is accompanied by the generation of harmful gases during the flame retardant process

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of this flame retardant is as follows:

[0028] Prepare 200mL of aqueous sodium carbonate solution (0.1mol / L) and 200mL of magnesium chloride hexahydrate solution (0.1mol / L) respectively, and add the aqueous sodium carbonate solution dropwise at a rate of 50mL / min to the magnesium chloride hexahydrate solution stirred at a constant speed of 1000rpm ; After the dropwise addition, the mixture was aged in an oven at 90°C for 5 hours; after the aging was completed, the precipitate was filtered out, washed and dried at 30°C for 60 min; after the drying was completed, the precipitate was placed in a muffle furnace for 10 The heating rate of ℃ / min was calcined to 900 ℃, and the temperature was kept for 5 hours to obtain nano-MgO white powder.

[0029] The MgO white powder was imaged by scanning electron microscope, the results are as follows figure 1 As shown, the microparticles are spherical in structure, stacked by multi-layer nanosheets, similar to f...

Embodiment 2

[0033] The preparation method of this flame retardant is as follows:

[0034] Prepare 200mL of aqueous sodium carbonate solution (0.1mol / L) and 200mL of magnesium chloride hexahydrate solution (0.1mol / L) respectively, and add the aqueous sodium carbonate solution dropwise at a rate of 1mL / min to the magnesium chloride hexahydrate solution stirred at a constant speed of 1000rpm ; After the dropwise addition, the mixture was aged in an oven at 50°C for 5 hours; after the aging was completed, the precipitate was filtered out, washed and dried at 100°C for 60 min; after drying, the precipitate was placed in a muffle furnace, and the Calcining at a heating rate of ℃ / min to 300 ℃ and holding for 0.5h to obtain micron MgO white powder.

[0035] The flame retardant effect test of this flame retardant is as follows:

[0036] MgO was spun into a film with a width of 15mm and a thickness of 0.1mm in the electrospinning solution doped with 5wt% cellulose acetate, and the combustion rate ...

Embodiment 3

[0038] The preparation method of this flame retardant is as follows:

[0039]Prepare 200mL of aqueous sodium carbonate solution (1.5mol / L) and 200mL of magnesium chloride hexahydrate solution (1.5mol / L) respectively, and add the aqueous sodium carbonate solution dropwise at a rate of 1mL / min to the magnesium chloride hexahydrate solution stirred at a constant speed of 1000rpm ; After the dropwise addition, the mixture was aged in an oven at 50°C for 1 h; after the aging was completed, the precipitate was filtered out, washed and dried at 30°C for 60 min; after drying, the precipitate was placed in a muffle furnace, and the The heating rate of ℃ / min was calcined to 900 ℃, and the temperature was kept for 0.5h to obtain nano-MgO white powder.

[0040] The flame retardant effect test of this flame retardant is as follows:

[0041] MgO was spun into a film with a width of 15 mm and a thickness of 0.1 mm in the electrospinning solution doped with 5 wt % of cellulose acetate, and t...

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Abstract

The invention provides a micro-nano magnesia flame retardant and a preparation method thereof. The preparation method comprises the following steps: firstly, dropwise adding a soluble carbonate aqueous solution with the concentration of 0.1 to 1.5 mol / L into a uniformly-stirred magnesium chloride hexahydrate aqueous solution with the concentration of 0.1 to 1.5 mol / L at the speed of 1 to 50 mL / min; secondly, putting a mixed solution obtained in the first step into a baking oven for curing at the curing temperature of 50 to 90 DEG C for 1 to 5 hours; thirdly, further filtering the mixed solution obtained in the second step, washing and drying; fourthly, putting a product obtained in the third step into a muffle furnace and calcining to 300 to 900 DEG C at the heating rate of 1 to 10 DEG C / min for 0.5 to 5 hours, thus obtaining the micro-nano magnesia flame retardant. The micro-nano magnesia flame retardant provided by the invention has excellent flame-retardant effect and good smoke suppression effect; a preparation process does not need to use an organic solvent, so that greenness and environment friendliness are realized.

Description

technical field [0001] The invention relates to the field of nanometer materials, more specifically to a micronano magnesium oxide flame retardant and a preparation method thereof. Background technique [0002] With the development of modern industry, the application scale of high molecular polymers is constantly expanding. Most of these substances are flammable, which leads to increasingly prominent fire hazards. In recent years, large-scale fire incidents have occurred frequently, and most of the fatal causes of fire It is the excessive smoke that causes suffocation. For example, in 2010, a fire broke out in a high-rise apartment building in Jing'an District, Shanghai, killing 58 people and injuring 71 people. The cause of the accident was that the molten metal splashed by electric welding ignited a large number of flammable polyurethane insulation material fragments accumulated below, thus causing a fire. Therefore, the containment of the fire is imminent. Starting fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/02C08K7/00C08K3/22D01F1/07D01F2/28
CPCC01F5/02C01P2002/72C01P2004/03C01P2004/61C08K3/22C08K7/00C08K2003/222D01F1/07D01F2/28
Inventor 邓波姜浪李可刘欣夏治刚李文斌徐卫林
Owner WUHAN TEXTILE UNIV
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