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alh 3 / Functionalized graphene composite material and its preparation method and application

A composite material and fossil technology, applied in energetic materials, functionalized graphene can improve AlH3 in the field of energetic materials under normal temperature conditions, and can solve the problems of reducing the energy of energetic materials, poor stability, and not dense surface coating, etc. Achieve the effect of obvious treatment effect, low system sensitivity and rich binding force

Active Publication Date: 2020-09-22
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the early 1960s, the U.S. military launched an investigation into AlH 3 was evaluated for military applications and found that AlH 3 Poor stability, hydrogen release during storage, not only reduces the energy of energetic materials, but also affects the preparation process and safety performance of energetic materials
Although these methods can increase AlH to a certain extent 3 The stability and safety of the propellant, but it usually leads to problems such as the decrease of the hydrogen content and the non-dense surface coating, which cannot meet the requirements for the safety performance of the propellant during the development process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Weigh 1gAlH 3 Place in a 500ml beaker, accurately measure 50ml of ethylene glycol, and after ultrasonication at 200w ultrasonic power for 5min, the temperature is controlled at 20°C, and it is ready to use under magnetic stirring at 200r / min to form A solution.

[0028] Step 2: Weigh 2mg of graphene oxide, add 50ml of ethylene glycol, and sonicate for 2 hours at 600w ultrasonic power to fully disperse the graphene oxide to form B solution. Add solution B dropwise to solution A and mix thoroughly for 30 minutes to form AB solution.

[0029] Step 3: Add 0.5 mg of polyetheramine dropwise to the AB solution at 1 drop / min, continue stirring for 30 minutes, take 200ml of cyclohexane and add dropwise to the above solution at 60 drops / min, after the dropwise addition, a black H 3 / graphene oxide suspension.

[0030] Step 4: After centrifuging the above suspension for 10 minutes, take the centrifuged black precipitate and wash it with ethanol and deionized water succ...

Embodiment 2

[0033] Step 1: Weigh 2gAlH 3 Place in a 1000ml beaker, accurately measure 100ml of ethanol, and after ultrasonication for 5 minutes at 200w ultrasonic power, control the temperature at 20°C and stir with 300r / min magnetic force for use, and record it as solution A;

[0034] Step 2: Weigh 20mg of graphene oxide, add 100ml of ethanol, and sonicate for 2 hours at 600w ultrasonic power to fully disperse the graphene oxide, and record it as B solution. Add solution B dropwise to solution A, mix thoroughly for 30 minutes, and record it as AB solution.

[0035] Step 3: Add 2 mg of PEG-400 dropwise to the AB solution at 10 drops / min. After the dropwise addition, continue to stir for 30 minutes. Take 400ml of carbon tetrachloride and add dropwise to the above solution at 300 drops / min to obtain ash Black AlH3 / graphene oxide suspension.

[0036] Step 4: After centrifuging the above suspension for 10 minutes, take the centrifuged black precipitate and wash it with ethanol and deioniz...

Embodiment 3

[0039] Step 1: Weigh 2gAlH 3 Place it in a 1500ml beaker, accurately measure 100ml of acetonitrile and ethylene glycol mixed solvent with a volume ratio of 1:1, and after ultrasonication for 5 minutes at 200w ultrasonic power, the temperature is controlled at 20°C, and it is stirred under 400r / min magnetic force. Use, recorded as A solution;

[0040] Step 2: Weigh 16mg of graphene oxide, add 100ml of acetonitrile and ethylene glycol mixed solvent with a volume ratio of 1:1, and sonicate for 2 hours under 600w ultrasonic power to fully disperse the graphene oxide, and record it as B solution. Add solution B dropwise to solution A at 20 drops / min, mix thoroughly for 30 minutes, and record it as AB solution.

[0041] Step 3: Add 2 mg of Tween dropwise to the AB solution at 20 drops / min. After the dropwise addition, continue to stir for 30 minutes. Take 800 ml of chloroform and add dropwise to the above solution at 200 drops / min to obtain black gray AlH 3 / graphene oxide suspen...

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Abstract

The invention provides an AlH3 / functional graphene composite material and a preparation method and application thereof. AlH3 and functional graphene serve as starting raw materials, and the AlH3 / functional graphene composite material is prepared through a solvent-nonsolvent method at room temperature. The preparation method comprises the steps that firstly, the AlH3 is prepared into suspension liquid A; secondly, a functional graphene dispersion liquid B is prepared; thirdly, after the A and the B are sufficiently mixed, a surface active agent C and a nonpolar solvent D are dropwise added, andself-assembly of the AlH3 and the functional graphene is completed. The process is simple, the operation is easy, and industrial production is facilitated; the AlH3 can be totally coated with a traceamount of functional graphene, and the graphene coating amount can be adjusted; the graphene is good in mechanical property and chemical stability, so that on the premise that the hydrogen content ofthe AlH3 is not affected, the application safety of the AlH3 in the fields of propellant and the like is effectively improved.

Description

technical field [0001] The invention belongs to the field of energetic materials, more specifically, relates to a kind of AlH that can be applied in the field of propellant, explosives or other energetic materials 3 / Functionalized graphene composite material, and its use of functionalized graphene to increase AlH at room temperature 3 Applicable methods in the field of energetic materials. Background technique [0002] Aluminum hydride (AlH 3 ) Compared with aluminum powder, it has the advantages of higher combustion heat and the ability to produce small molecule gas, and is an ideal fuel to replace aluminum powder in solid composite propellants. According to the theoretical calculation results, using AlH 3 Instead of aluminum powder, the specific impulse of the solid propellant can be increased by at least 100N.s.kg -1 , and its combustion chamber and ejection gas temperature are lower than the aluminum powder propellant. Therefore, AlH 3 High-energy additives as so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B6/06C06D5/00C01B32/182C01B32/198
CPCC01B6/06C06D5/00
Inventor 李磊何云凤杜芳顾健陶博文胡建江
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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