Preparation method and application of nitrated chitosan/go/n-ti composite material

A technology of nitrated chitosan and composite materials, which is applied in the field of preparation of nitrated chitosan/GO/n-Ti composite materials, can solve problems that need to be improved, achieve rapid and stable combustion, improve safety performance, and burn full effect

Active Publication Date: 2022-05-17
NORTHWEST UNIV
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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 acetone suspension of n-Ti; stir and dissolve 0.1g of nitrated chitosan in 15mL of acetone solution to obtain acetone solution of nitrated chitosan; 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 on the ...

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. First, the suspension of nano-titanium powder is added dropwise to a nitrated chitosan solution, and after being uniformly mixed by acoustic resonance, the graphene oxide suspension is added dropwise, and finally the suspension is subjected to acoustic resonance. The high-energy nanocomposite material is obtained after uniform resonance mixing, centrifugal filtration and vacuum freeze-drying. The high-energy nano-composite nitrated chitosan / GO / n-Ti prepared by the invention has uniform dispersion, sufficient combustion, and huge energy release, and can be used as a combustion agent or a combustion additive of a solid propellant to realize rapid and stable combustion of a solid propellant . The synthesis method of the invention is simple, efficient and easy for industrialized 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 Patents(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
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