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Polyoxyethylene-based ionic conduction type propellant and preparation method thereof

A polyethylene oxide, ion-conducting technology, used in offensive equipment, explosives processing equipment, explosives, etc., to achieve high energy density, reduce agglomeration, and improve combustion efficiency.

Inactive Publication Date: 2021-02-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are few related researches in China, so it is of great significance to design a new generation of ion-conducting propellants

Method used

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  • Polyoxyethylene-based ionic conduction type propellant and preparation method thereof
  • Polyoxyethylene-based ionic conduction type propellant and preparation method thereof
  • Polyoxyethylene-based ionic conduction type propellant and preparation method thereof

Examples

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preparation example Construction

[0031] The preparation method comprises the following steps:

[0032] S1. A certain amount of plasticizer (such as ethylene carbonate crystals) is added to a certain amount of solvent (concentration is 40mg / ml), magnetically stirred at room temperature until it dissolves completely (usually 20-30 minutes), and the plasticizer is obtained. plasticizer solution;

[0033] S2. A certain amount of buffer solution (Tris solution) is added to a certain amount of distilled water (usually the concentration is 1-3mg / mL), adding dilute hydrochloric acid to adjust the pH value between 8-8.5, adding dopamine and stirring for a period of time (usually 5-15 minutes), dopamine is partially polymerized, the solution turns brown, then aluminum powder is added and stirred, so that dopamine is polymerized in situ on the surface of the aluminum powder to form a polydopamine layer, filtered and dried to obtain polydopamine-coated aluminum powder;

[0034] S3. Dissolving a certain amount of polyeth...

example 1

[0040] A polyoxyethylene-based ion-conductive propellant and a preparation method thereof, comprising the following process steps:

[0041] (1) Preparation of plasticizer solution: 200 mg of ethylene carbonate crystals were weighed, dissolved in 5 ml of absolute ethanol, and magnetically stirred at room temperature for 20 minutes to obtain a plasticizer solution.

[0042] (2) Preparation of surface-coated polydopamine aluminum powder: Add 0.30 g of dopamine and 0.18 g of Tris buffer solution (pH=8.5) into 150 ml of distilled water, stir until the dopamine molecules partially polymerize (the color turns brown), and then add 2.0 g of micron aluminum powder (1-2 μm) was stirred for 4 hours to in-situ polymerize polydopamine on the surface of the aluminum powder to form a polydopamine layer, and the mixture was taken out, centrifuged and freeze-dried to obtain an aluminum powder whose surface was evenly coated with polydopamine.

[0043] (3) Preparation of polymer matrix: Weigh 90...

example 2

[0053] A polyoxyethylene-based ion-conductive propellant and a preparation method thereof, comprising the following process steps:

[0054] (1) Preparation of plasticizer solution: 200 mg of ethylene carbonate crystals were weighed, dissolved in 5 ml of absolute ethanol, and magnetically stirred at room temperature for 20 minutes to obtain a plasticizer solution.

[0055] (2) Preparation of surface-coated polydopamine aluminum powder: Add 0.30 g of dopamine and 0.18 g of Tris buffer solution (pH=8.5) into 150 ml of distilled water, stir until the dopamine molecules partially polymerize (the color turns brown), and then add 2.0 g of micron aluminum powder (1-2 μm) was stirred for 4 hours to in-situ polymerize polydopamine on the surface of the aluminum powder to form a polydopamine layer, and the mixture was taken out, centrifuged and freeze-dried to obtain an aluminum powder whose surface was evenly coated with polydopamine.

[0056] (3) Preparation of polymer matrix: Weigh 90...

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Abstract

The invention relates to a polyoxyethylene-based ionic conduction type propellant and a preparation method, polyoxyethylene is used as a matrix, and lithium perchlorate and other perchlorates are usedas binary oxidants, so that the ionic conduction type propellant has certain mechanical properties, free movement of lithium ions in a polyoxyethylene-based body chain segment is realized, and the ionic conductivity is relatively high. The feasibility of realizing combustion regulation and control of the polyoxyethylene-based ionic conduction type propellant under the action of external voltage is verified. The polydopamine is adopted to coat the aluminum powder in situ, so that agglomeration of the aluminum powder is effectively reduced, the combustion efficiency of the aluminum powder is improved, and the metal aluminum powder is prevented from forming an electronic path in a polymer collective to cause the failure of the ion conductive propellant. The polyoxyethylene-based ionic conductive propellant provided by the invention has high energy density and certain ionic conductivity, and meets the use requirements of electronic control propellants.

Description

technical field [0001] The invention belongs to the field of propulsion technology, and relates to a polyoxyethylene-based ion-conductive propellant and a preparation method. Background technique [0002] After a long period of development, solid rocket motors have irreplaceable advantages such as simple structure, strong reliability, and long storage time. However, once the structure of solid rocket motors is fixed, it is difficult to achieve thrust regulation and repeated start-stop goals. For this reason, some scholars have proposed the concept of electronically controlled solid propellant, that is, electrodes are embedded in the electronically controlled propellant, and the ignition, flameout, and thrust of the engine can be actively adjusted by controlling the voltage of the electrode through a program. ET Materials LLC of the United States has successively developed electronically controlled solid propellants such as ASPEN and HIPEP. (W.Sawka, M.McPherson.Electrical s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/12C06B21/00
CPCC06B21/0025C06B21/0058C06B33/12
Inventor 严启龙王帅中何伟刘佩进
Owner NORTHWESTERN POLYTECHNICAL UNIV
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