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A kind of micronano magnesium oxide 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, high smoke emission of flame retardants, etc., and achieve the effects of excellent flame retardant effect, stable chemical properties, and wide source of raw materials

Active Publication Date: 2021-05-14
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

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  • A kind of micronano magnesium oxide flame retardant and preparation method thereof
  • A kind of micronano magnesium oxide flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0028] 200 mL of sodium carbonate aqueous solution (0.1 mol / L) and 200 mL of magnesium chloride hexahydrate solution (0.1 mol / L) were prepared respectively, and the sodium carbonate aqueous solution was added dropwise at a rate of 50 mL / min to the hexahydrate stirred at a constant speed of 1000 rpm. Magnesium chloride hydrate solution; after the dropwise addition, the mixture was aged in an oven at 90 °C for 5 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 In a Furnace, calcined to 900 °C at a heating rate of 10 °C / min and held for 5 h to obtain a white nano-MgO powder.

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

Embodiment 2

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

[0034] 200 mL of sodium carbonate aqueous solution (0.1 mol / L) and 200 mL of magnesium chloride hexahydrate solution (0.1 mol / L) were prepared respectively, and the sodium carbonate aqueous solution was added dropwise at a rate of 1 mL / min to the six Magnesium chloride hydrate solution; after the dropwise addition, the mixture was aged in an oven at 50 °C for 5 h; 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 In a Furnace, calcined to 300 °C at a heating rate of 1 °C / min and held for 0.5 h to obtain micron MgO white powder.

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

[0036] MgO was doped with 5 wt% in the electrospinning solution of cellulose acetate to form a film with a width of 15 mm and a thickness of 0.1 mm. The combustion rate of the composite film was measured...

Embodiment 3

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

[0039]200 mL of sodium carbonate aqueous solution (1.5 mol / L) and 200 mL of magnesium chloride hexahydrate solution (1.5 mol / L) were prepared respectively, and the sodium carbonate aqueous solution was added dropwise at a rate of 1 mL / min to the six Magnesium chloride hydrate solution; 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 horse In a Furnace, calcined to 900 °C at a heating rate of 1 °C / min and held for 0.5 h to obtain a white nano-MgO powder.

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

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

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Abstract

The invention provides a micronano magnesium oxide flame retardant and a preparation method thereof. The preparation method comprises the following steps: 1) Adding a soluble carbonate aqueous solution with a concentration of 0.1 to 1.5 mol / L dropwise at a rate of 1 to 50 mL / min to magnesium chloride hexahydrate with a concentration of 0.1 to 1.5 mol / L stirred at a constant speed in an aqueous solution; 2) placing the mixed solution obtained in step 1) in an oven for aging at a temperature of 50-90°C for 1-5 hours; 3) further filtering, washing and drying the mixed solution obtained in step 2); and 4) The product obtained in step 3) is calcined in a muffle furnace, and calcined to 300-900° C. at a heating rate of 1-10° C. / min for 0.5-5 hours to prepare a micronano-sized magnesium oxide flame retardant. According to the micronano magnesium oxide flame retardant provided by the present invention, the preparation process does not need to use organic solvents, is environmentally friendly, has excellent flame retardant effect, and good smoke suppression effect.

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. Part of the cause of the accident was that molten metal from welding spatter ignited a large number of flammable fragments of polyurethane insulation material accumulated below, causing a fire. Therefore, the containment of the fire is imminent. Starting from raw materials, the method to contain combustion is mainly to add appropriate flame retardants to improve the heat resistance of polymers. [0003] Fla...

Claims

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Application Information

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Patent Type & Authority Patents(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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