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Unsymmetrical dimethylhydrazine absorbent as well as preparation method and application

A technology of unsymmetrical dimethylhydrazine and absorbent, which is applied in the field of propellant treatment and can solve problems such as unsatisfactory absorption effect and poor stability

Active Publication Date: 2020-05-19
中国人民解放军火箭军工程大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current adsorbents have the disadvantages of unsatisfactory absorption effect and poor stability.

Method used

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  • Unsymmetrical dimethylhydrazine absorbent as well as preparation method and application
  • Unsymmetrical dimethylhydrazine absorbent as well as preparation method and application
  • Unsymmetrical dimethylhydrazine absorbent as well as preparation method and application

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preparation example Construction

[0027] A kind of preparation method of unsymmetrical dimethylhydrazine absorbent, described unsymmetrical dimethylhydrazine absorbent comprises A component and B component, and preparation method comprises the steps:

[0028] Preparation of component A: Weigh 3g CTAB and dissolve it in 100ml of deionized water, take 100ml of graphene dispersion and 200ml of nanocellulose solution, mix them evenly and add them to a 500ml three-necked flask, use NaOH to adjust the pH of the solution to 8.5 to obtain a mixed solution, and 14ml tetraethyl orthosilicate is added dropwise in the described mixed solution with the speed of 1~2d / s, wherein, mass ratio graphene: nanocellulose: tetraethyl orthosilicate=1:4:25, at 40 Stir at °C for 24 hours, filter the reaction slurry with suction to obtain a filter cake, wash with ethanol three times, and vacuum-dry at 60°C for 24 hours to obtain component A.

[0029] Preparation of component B: select commercialized D113 macroporous weakly acidic cation...

Embodiment 1

[0040] Embodiment 1: the preparation of unsymmetrical dimethylhydrazine adsorbent A component

[0041] Weigh 3g of CTAB and dissolve it in 100ml of deionized water, take 100ml of graphene dispersion (aqueous solution), 200ml of nanocellulose solution, mix them evenly and add them to a 500ml three-necked flask, use NaOH to adjust the pH of the solution to 8.5, and mix 14ml of orthosilicon Ethyl acetate was added dropwise to the above mixed solution at a rate of 1-2d / s, stirred at 40°C for 24h, the resulting slurry was suction filtered to obtain a filter cake, washed with ethanol three times, and vacuum-dried at 60°C for 24h. Obtain the A component. (mass ratio graphene: nanocellulose: tetraethyl orthosilicate=1:4:25)

Embodiment 2

[0042] Embodiment 2: the preparation of unsymmetrical dimethylhydrazine adsorbent B component

[0043] Commercialized D113 macroporous weakly acidic cation exchange resin was selected. In the pretreatment process, first use deionized water to soak and wash the water until the water is clear without turbidity, then use 3% NaOH to soak for 3 hours, pour off the lye, and use deionized water to wash Rinse the resin until it is neutral, preferably soak it in 5% HCl solution for 6 hours, pour off the acid solution, and wash it with deionized water until it is neutral.

[0044] color appearance

[0045] The unsymmetrical dimethylhydrazine absorbent consists of two components, A and B, component A is gray-black fibrous particles, and component B is light yellow particles, such as figure 2 shown.

[0046] SEM

[0047] The characterization morphology of graphene-based UDM absorbent composites was observed by emission electron microscopy. Depend on image 3 In (a), it can be seen t...

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Abstract

The invention belongs to the technical field of propellant treatment, and discloses an unsymmetrical dimethylhydrazine absorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: weighing a proper amount of CTAB and dissolving CTAB into 100mL of deionized water,taking 100 ml of a graphene dispersion liquid and 200 ml of a nano cellulosesolution,uniformly mixing and adding an obtained mixture into a 500ml three-necked flask; adjusting the pH value of the mixture to 8.5 by using NaOH to obtain a mixed solution; dropwise adding 9-18 mlof tetraethoxysilane into the mixed solution, wherein the mass ratio of graphene to nanocellulose to tetraethoxysilane is 1: 4: 16.7-33.4;stirringfor 24 h at the temperature of 40 DEG C, subjecting aslurry obtained after reactionto suction filtration to obtain a filter cake, washing the filter cake three times with ethyl alcohol, carrying out vacuum drying for 24h at the temperature of 60 DEG Cto obtain a component A; preparing a component B: selecting commercialized macroporous weakly acidic cation exchange resin, and sequentially pretreatingby using deionized water, an alkali and an acidbefore use. The absorbent provided by the invention has the advantages of stable performance and good absorption effect.

Description

technical field [0001] The invention relates to the technical field of propellant treatment, in particular to an unsymmetrical dimethylhydrazine absorbent and its preparation method and application. Background technique [0002] The description of the background technology of the present invention belongs to the relevant technology related to the present invention, and is only used to illustrate and facilitate the understanding of the content of the present invention. prior art on the filing date. [0003] Liquid propellants have the advantages of high specific impulse, easy adjustment of thrust, multiple ignitions, and pulse work, and are widely used in various strategic missiles, tactical missiles, large launch vehicles, and various spacecraft. Among them, nitrous oxide represented by dinitrogen tetroxide and hydrazine fuel represented by unsymmetrical dimethylhydrazine, anhydrous hydrazine, and methylhydrazine are the most commonly used conventional liquid propellants. ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/42C02F1/66C02F101/32
CPCC02F1/281C02F1/283C02F1/285C02F1/42C02F1/66C02F2101/32
Inventor 贾瑛吕晓猛许国根方涛索志勇沈可可
Owner 中国人民解放军火箭军工程大学
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