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Nano magnesium hydroxide/hexagonal boron nitride nanocomposite material and preparation method

A nano-magnesium hydroxide and nano-composite material technology is applied in the field of material preparation, which can solve the problem of only 340 degrees of flame retardant temperature, and achieve the effect of improving the flame retardant temperature and simple preparation process.

Active Publication Date: 2019-01-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a nano-magnesium hydroxide / hexagonal boron nitride nanocomposite material and a preparation method, aiming at the current problem that the flame-retardant temperature of magnesium hydroxide is only 340 degrees

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  • Nano magnesium hydroxide/hexagonal boron nitride nanocomposite material and preparation method

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Experimental program
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Effect test

Embodiment 1

[0021] Commercially available hexagonal boron nitride powder was added to dimethylformamide to obtain a 2.9% hexagonal boron nitride solution and sonicated for 8 hours. Pour the sonicated solution into a centrifuge tube and centrifuge at 5000 rpm for 5 minutes. Pour the supernatant into a beaker and dry it at 80 degrees Celsius to obtain a powder.

[0022] Dissolve 2 parts of magnesium chloride in 40 parts of deionized water to obtain a magnesium chloride solution. Weigh 0.5 parts of the above-mentioned hexagonal boron nitride powder and stir it into the calcium chloride solution and heat it to 180 degrees Celsius. Dissolve 10 parts of sodium hydroxide in 1 part of deionized water to obtain a sodium hydroxide solution. When the solution of magnesium chloride and powder is heated to 180 degrees centigrade, sodium hydroxide solution is added rapidly therein, and the insulation is continued for 24 hours after completion. After the incubation period, it was cooled to room tempe...

Embodiment 2

[0024] Add commercially available hexagonal boron nitride powder into dimethylformamide to obtain a 3.5% hexagonal boron nitride solution and sonicate for 10 h. Pour the sonicated solution into a centrifuge tube and centrifuge at 6000 rpm for 8 minutes. Pour the supernatant into a beaker and dry at 90°C to obtain a powder.

[0025] Dissolve 3 parts of magnesium chloride in 60 parts of deionized water to obtain a magnesium chloride solution. Weigh 0.7 parts of the above-mentioned hexagonal boron nitride powder, stir and add it into the calcium chloride solution and heat it to 200 degrees Celsius. Dissolve 20 parts of sodium hydroxide in 2 parts of deionized water to obtain a sodium hydroxide solution. After the solution of magnesium chloride and powder is heated to 200 degrees Celsius, add sodium hydroxide solution rapidly therein, and continue to keep warm for hours after finishing. After the incubation period, it was cooled to room temperature. The solution was then vacuu...

Embodiment 3

[0027] Add commercially available hexagonal boron nitride powder into dimethylformamide to obtain a 4.3% hexagonal boron nitride solution and sonicate for 12 hours. Pour the sonicated solution into a centrifuge tube and centrifuge at 7000 rpm for 10 minutes. Pour the supernatant into a beaker and dry it at 100 degrees Celsius to obtain a powder.

[0028] Dissolve 4 parts of magnesium chloride in 80 parts of deionized water to obtain a magnesium chloride solution. Weigh 1.5 parts of the above-mentioned hexagonal boron nitride powder and stir it into the calcium chloride solution and heat it to 220 degrees Celsius. Dissolve 20 parts of sodium hydroxide in 2 parts of deionized water to obtain a sodium hydroxide solution. After the solution of magnesium chloride and powder is heated to 220 degrees Celsius, sodium hydroxide solution is added rapidly therein, and the insulation is continued for 48 hours after completion. After the incubation period, it was cooled to room temperat...

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Abstract

The invention relates to a magnesium hydroxide / hexagonal boron nitride nanocomposite material and a preparation method thereof. Peeling is conducted on hexagonal boron nitride initially, the peeled hexagonal boron nitride powder is added into a magnesium chloride solution, then a sodium hydroxide solution is added, and powder of the magnesium hydroxide / hexagonal boron nitride nanocomposite material is obtained after a reaction is conducted. The preparation process is simple and time-saving. Meanwhile, through adjustment of the content of raw materials, the magnesium hydroxide / hexagonal boron nitride nanocomposite material with different loading amounts of magnesium hydroxide can be obtained. Compared with the prior art, the flame retardant temperature of magnesium hydroxide is greatly improved by the composite material. When the material is heated at 340 DEG C or above, although magnesium hydroxide starts to decompose, the high-temperature resistance of boron nitride still enables the material to have flame retardance, and thus the flame retardant temperature of a magnesium hydroxide material is improved.

Description

technical field [0001] The invention belongs to the field of material preparation, and relates to a nano-magnesium hydroxide / hexagonal boron nitride nanocomposite material and a preparation method. Background technique [0002] Fire is a kind of disaster with high incidence in the world, which is easy to cause heavy economic losses and casualties. According to incomplete statistics, in terms of economy, the economic loss caused by fire is equivalent to 0.2%-0.3% of the gross national product of European and North American countries. In terms of human fatalities, there are thousands of fire-related deaths in all countries including developed countries in Europe and North America (CN201110307227.7, China). Adding flame retardants is an effective way to prevent fires. Among many flame retardant materials, magnesium hydroxide (Mg(OH) 2 ) is an ideal flame retardant material. For example, adding it to plastic can stop the plastic from burning and producing smoke. On the othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/22C08K3/38
CPCC08K3/22C08K3/38C08K2003/2224C08K2003/385C08K2201/011
Inventor 李炫华朱金萌魏秉庆
Owner NORTHWESTERN POLYTECHNICAL UNIV
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