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an alpha-alh 3 -evoh double-shell structure compound, preparation method and application

An a-alh3-evoh, double-shell technology, which is used in offensive equipment, explosives processing equipment, explosives, etc., can solve problems such as decomposition phenomena, and achieve the effects of improving thermal stability and safe and reliable preparation methods.

Active Publication Date: 2022-03-15
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently α-AlH 3 Applied to solid propellants, it is also necessary to solve the decomposition phenomenon in the range of room temperature and solid propellant process temperature

Method used

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  • an alpha-alh <sub>3</sub> -evoh double-shell structure compound, preparation method and application
  • an alpha-alh <sub>3</sub> -evoh double-shell structure compound, preparation method and application
  • an alpha-alh <sub>3</sub> -evoh double-shell structure compound, preparation method and application

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preparation example Construction

[0028] In order to further improve the high α-AlH on the basis of pickling passivation 3 Thermal stability, the present invention provides a kind of α-AlH 3 / Al 2 o 3 / EVOH double-shell structure compound, its preparation method and its application.

[0029] The α-AlH3-EVOH double-shell structure composite of the present invention, the double-shell structure composite includes an inner core from the inside to the outside, a first shell wrapping the inner core, and a second shell wrapping the first shell;

[0030] The inner core is α-AlH 3 core, the first shell is Al 2 o 3 layer, and the second shell layer is a polymer layer.

[0031] The polymer layer of the present invention is a material layer formed of EVOH. The diameter of the core is 200nm-40um; the thickness of the first shell is 5-30nm; the thickness of the second shell is 1-15nm.

[0032] The present invention further provides a kind of α-AlH 3 -The preparation method of EVOH double-shell structure composite, ...

Embodiment 1

[0046] (1) Obtain α-AlH by pickling 3 / Al 2 o 3

[0047] First, configure a dilute hydrochloric acid solution with a volume fraction of 10%; secondly, take a certain amount of synthesized α-AlH 3 Add dilute hydrochloric acid solution and stir for 5 minutes, filter and wash with ethanol three times, and finally freeze-dry to obtain off-white powder sample.

[0048] (2)α-AlH 3 / Al 2 o 3 Preparation of / EVOH double-shell structure composite

[0049] First, add 30mg EVOH into 20ml DMSO solvent, heat to 80°C and keep the temperature constant for 30min while stirring rapidly. Then take 600mgα-AlH 3 / Al 2 o 3 Add 100ml of deionized water, ultrasonic and stir to disperse for 5min. The DMSO solution containing EVOH was slowly added to α-AlH within 10 min 3 / Al 2 o 3 suspension, then stirred rapidly for 2h, filtered and washed 3 times with ethanol. Finally, freeze-dry to obtain a gray powder sample α-AlH 3 - EVOH double shell structure compound.

[0050] α-AlH 3 / Al 2...

Embodiment 2

[0058] (1) Obtain α-AlH by pickling 3 / Al 2 o 3

[0059] First, configure a dilute hydrochloric acid solution with a volume fraction of 5%; secondly, take a certain amount of synthesized α-AlH 3 Add it to dilute hydrochloric acid solution for 6 minutes, filter and wash with ethanol three times, and finally freeze-dry to obtain an off-white powder sample.

[0060] (2)α-AlH 3 / Al 2 o 3 Preparation of / EVOH double-shell structure composite

[0061] First, take 10mg of EVOH and add it into 20ml of DMSO solvent, heat to 80°C and keep the temperature constant for 30min while stirring rapidly. Then take 300mgα-AlH 3 / Al 2 o 3 Add 100ml of deionized water, sonicate and stir to disperse for 3min. The DMSO solution containing EVOH was slowly added to α-AlH within 10 min 3 / Al 2 o 3 suspension, then stirred rapidly for 1 h, filtered and washed 3 times with ethanol. Finally, freeze-dry to obtain a gray powder sample α-AlH 3 - EVOH double shell structure compound.

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Abstract

The invention discloses an α-AlH3-EVOH double-shell structure compound, a preparation method and an application. A kind of α-AlH3-EVOH double-shell structure compound, this compound comprises inner core from inside to outside, wraps the first shell of inner core, wraps the second shell of first shell; Described inner core is α ‑AlH 3 core, the first shell is Al 2 o 3 layer, the second shell layer is a polymer layer; the polymer layer is a material layer formed of ethylene vinyl alcohol copolymer (EVOH, ethylene vinyl alcohol copolymer). α‑AlH 3 / Al 2 o 3 with α‑AlH 3 / Al 2 o 3 / EVOH for comparison, the double-shell structure compound α-AlH synthesized by this method 3 / Al 2 o 3 The thermal stability of / EVOH is significantly improved.

Description

technical field [0001] The present invention relates to α-AlH 3 -EVOH double-shell structure compound, preparation method and application, the double-shell structure can significantly improve α-AlH 3 thermal stability. Background technique [0002] The introduction of hydrogen during the combustion of solid propellants can effectively reduce the average relative molecular mass of the gas; at the same time, the high combustion calorific value of hydrogen helps to increase the temperature of the combustion chamber and increase the specific impulse. Aluminum hydride is a light metal hydride with a relatively high hydrogen content, with a hydrogen content of 10.08%, and a hydrogen storage density of 148g / L, which is twice that of liquid hydrogen (70.8g / L). Compared with aluminum powder, With higher combustion calorific value, it is an ideal solid propellant fuel. Currently, AlH 3 There are a total of 7 different crystal forms including: α, α′, β, γ, δ, ε, and ζ. Among them, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B21/00C06B45/32C06B43/00C06D5/06
CPCC06B21/0016C06B45/32C06B43/00C06D5/06
Inventor 蒋周峰赵凤起李辉袁志锋王明星姜一帆李娜张明张建侃
Owner XIAN MODERN CHEM RES INST