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NaN3@BNNTs (boron nitride nanotubes) confinement nanometer compound material and preparation method thereof

A nanocomposite material and confinement technology, applied in the field of NaN3@BNNTs confinement nanocomposite materials and their preparation, can solve problems such as unstable characteristics and achieve the effect of solving the problem of safe storage

Active Publication Date: 2019-04-05
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, NaN 3 It has unstable characteristics under the action of heat, light, radiation, and shock. Therefore, how to realize the safe storage of sodium azide is an urgent scientific problem to be solved.

Method used

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  • NaN3@BNNTs (boron nitride nanotubes) confinement nanometer compound material and preparation method thereof
  • NaN3@BNNTs (boron nitride nanotubes) confinement nanometer compound material and preparation method thereof
  • NaN3@BNNTs (boron nitride nanotubes) confinement nanometer compound material and preparation method thereof

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[0027] The present invention also provides the NaN described in the technical solution 3 The preparation method of @BNNTs confinement nanocomposite comprises the following steps:

[0028] (1) providing an aqueous dispersion of sodium azide and boron nitride nanotubes;

[0029] (2) The aqueous dispersion obtained in the step (1) is subjected to freeze-drying, washing and natural drying successively to obtain NaN 3 @BNNTs confined nanocomposites.

[0030] The invention provides an aqueous dispersion of sodium azide and boron nitride nanotubes. In the present invention, the mass of boron nitride nanotubes and sodium azide in the aqueous dispersion is preferably 1:7 to 8, more preferably 1:7.2; the concentration of sodium azide in the aqueous dispersion is Preferably it is 28%-29.6%, more preferably 29.6%. When the concentration of sodium azide is preferably 29.6%, the sodium azide reaches a saturated state in the aqueous dispersion.

[0031] In the present invention, the prep...

Embodiment 1

[0038] Dissolve excess sodium azide solid powder in deionized water, stir magnetically for 30 min, and take the supernatant after standing to obtain a saturated sodium azide aqueous solution. Add 0.03 g of boron nitride nanotubes into 0.5 mL of saturated sodium azide aqueous solution, and vibrate ultrasonically for 2 h to obtain a stable and uniform suspension. The suspension obtained by ultrasonic treatment was subjected to freeze-drying treatment for 72 h by using freeze-drying technology. Collect the freeze-dried product, place it on wet filter paper (wetting with deionized water) and wash it with water for 3 to 5 times to remove most of the sodium azide attached to the surface of the boron nitride nanotube, and then wash the The sample was dried naturally for 48 hours to obtain NaN 3 @BNNTs confined nanocomposites.

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Abstract

The invention relates to the technical field of confinement nanometer compound materials, particularly to a NaN3@BNNTs confinement nanometer compound material and a preparation method thereof. According to the NaN3@BNNTs confinement nanometer compound material, sodium azide is confined inside boron nitride nanotubes, and through weak interaction between the sodium azide and the boron nitride nanotubes, the sodium azide can exist stably, so that the problem of safe storage of the sodium azide can be solved.

Description

technical field [0001] The invention relates to the technical field of confined nanocomposite materials, in particular to a NaN 3 @BNNTs confined nanocomposites and their preparation methods. Background technique [0002] Sodium azide (NaN 3 ) is a typical alkali metal azide compound, which is used as a chemical nitrogen source, a gas generator, and even a raw material for explosives due to its unstable properties under the action of heat, light, radiation, and shock. More importantly, NaN 3 Nitrogen in the azide (N 3 - ) form, in which the nitrogen atoms are bonded in the form of double bonds, and the double bond energy (418KJ / mol) is much lower than the triple bond (954KJ / mol) in nitrogen, and it is easier to dissociate to form a polymer phase, which is A high energy density material. However, NaN 3 It has unstable characteristics under the action of heat, light, radiation, and shock. Therefore, how to realize the safe storage of sodium azide is an urgent scientific...

Claims

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Application Information

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IPC IPC(8): C01B21/08C01B21/064B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C01B21/0648C01B21/08C01P2002/72C01P2002/77C01P2002/82C01P2002/85C01P2004/03C01P2004/04C01P2004/13C01P2004/82
Inventor 刘波郭琳琳刘然刘冰冰
Owner JILIN UNIV
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