Preparation method and application of nitrated chitosan/GO/n-Ti composite material

A technology for nitrified chitosan and composite materials, which is applied in the field of preparation of nitrified chitosan/GO/n-Ti composite materials, can solve problems to be improved, achieve rapid steady combustion, increase active components, improve The effect of safety features

Active Publication Date: 2021-11-16
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, after the existing method coats n-Ti particles, the performance needs to be improved, so it is necessary to provide a new coating strategy to improve its dispersion performance and combustion performance.

Method used

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  • Preparation method and application of nitrated chitosan/GO/n-Ti composite material
  • Preparation method and application of nitrated chitosan/GO/n-Ti composite material
  • Preparation method and application of nitrated chitosan/GO/n-Ti composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Ultrasonic disperse 0.7g of n-Ti powder (100nm ~ 150nm) in 15mL of acetone solution to obtain n-Ti acetone suspension; stir and dissolve 0.1g of nitrated chitosan in 15mL of acetone solution to obtain nitrated chitosan Acetone solution; 4.0 mg of GO was ultrasonically dispersed in 15 mL of ethanol solution to obtain an ethanol suspension of graphene oxide (GO).

[0037] Then the acetone suspension of n-Ti was added dropwise to the nitrated chitosan acetone solution, and after being uniformly mixed by acoustic resonance, the ethanol suspension of graphene oxide (GO) was added dropwise, and then uniformly mixed by acoustic resonance, centrifuged After filtration and vacuum freeze-drying, a brown powder is obtained, which is the high-energy nanocomposite nitrated chitosan / GO / n-Ti.

[0038] figure 1 Middle (d) is the SEM image of the nitrated chitosan / GO / n-Ti prepared in this example, and the results show that the n-Ti core-shell particles coated with nitrated chitosan are...

Embodiment 2

[0040] Ultrasonic disperse 0.7g of n-Ti in 15mL of acetone solution to obtain an acetone suspension of n-Ti; stir and dissolve 0.1g of nitrated chitosan in 15mL of acetone solution to obtain a solution of nitrated chitosan in acetone; GO was ultrasonically dispersed in 15 mL of ethanol solution to obtain ethanol suspension of graphene oxide (GO).

[0041] Then the acetone suspension of n-Ti was added dropwise to the nitrated chitosan acetone solution, and after being uniformly mixed by acoustic resonance, the ethanol suspension of graphene oxide (GO) was added dropwise, and then uniformly mixed by acoustic resonance, centrifuged After filtration and vacuum freeze-drying, a brown powder is obtained, which is the high-energy nanocomposite nitrated chitosan / GO / n-Ti.

[0042] figure 1Middle (e) is the SEM picture of the nitrated chitosan / GO / n-Ti that this embodiment makes, and the result shows: the n-Ti core-shell particles coated with nitrated chitosan are successfully supported...

Embodiment 3

[0045] Ultrasonic disperse 0.7g of n-Ti in 15mL of acetone solution to obtain an acetone suspension of n-Ti; stir and dissolve 0.1g of nitrated chitosan in 15mL of acetone solution to obtain a solution of nitrated chitosan in acetone; GO was ultrasonically dispersed in 15 mL of ethanol solution to obtain ethanol suspension of graphene oxide (GO).

[0046] Then the acetone suspension of n-Ti was added dropwise to the nitrated chitosan acetone solution, and after being uniformly mixed by acoustic resonance, the ethanol suspension of graphene oxide (GO) was added dropwise, and then uniformly mixed by acoustic resonance, centrifuged After filtration and vacuum freeze-drying, a brown powder is obtained, which is the high-energy nanocomposite nitrated chitosan / GO / n-Ti.

[0047] figure 1 Middle (f) is the SEM image of the nitrated chitosan / GO / n-Ti prepared in this example, and the results show that the n-Ti core-shell particles coated with nitrated chitosan are evenly loaded on the ...

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Abstract

The invention relates to a preparation method of a high-energy nano composite material, which comprises the following steps: firstly, dropwise adding a suspension of nano titanium powder into a nitrated chitosan solution, uniformly mixing through acoustic resonance, then dropwise adding a graphene oxide suspension, and finally uniformly mixing through acoustic resonance, centrifugally filtering and freeze-drying in vacuum to obtain the high-energy nano composite material. The prepared high-energy nano composite material nitrated chitosan / GO / n-Ti is uniform in dispersion, sufficient in combustion and huge in energy release, can be used as a combustion agent or a combustion additive of a solid propellant, and realizes quick steady-state combustion of the solid propellant. The synthesis method is simple, efficient and easy for industrial production.

Description

technical field [0001] The invention belongs to the technical field of nano energy-containing materials, and in particular relates to a preparation method and application of a nitrated chitosan / GO / n-Ti composite material. Background technique [0002] Nano-titanium powder (n-Ti) has a high volume calorific value (89.42kJ cm -3 ) and superior ignition performance, so it can be used as a fuel additive for energetic materials to improve combustion performance and explosive power, and has an important application prospect in solid propellants. However, the activity of nano titanium powder is extremely high, and it is easy to oxidize and agglomerate, which leads to problems such as a decrease in active components, a decrease in energy density, an increase in ignition temperature, incomplete combustion, and low energy release efficiency. In order to solve this problem, researchers in related fields at home and abroad have conducted extensive research on it. One of the most pract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08K3/04C08K3/08C06B33/08C06D5/06
CPCC08K3/08C08K3/042C06B33/08C06D5/06C08K2003/0881C08K2201/011C08L5/08
Inventor 徐抗震张文珍秦钊万冲陈苏杭李辉仪建华
Owner NORTHWEST UNIV(CN)
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