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Nanometer Al/Ni/hydroxyl-terminatedpoly butadiene (HTPB) nucleus-shell structure energetic composite particle and preparation method thereof for solid propellant

A solid propellant and composite particle technology, applied in the direction of offensive equipment, compressed gas generation, etc., to achieve the effects of improving comprehensive performance, improving compatibility, and improving activity

Inactive Publication Date: 2015-06-24
NANJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Invention patent application CN 102717068A (a synthesis method of nano-Al / HTPB core-shell structure energetic composite particles) The in-situ passivation method is used to directly coat nano-Al with HTPB (hydroxyl-terminated polybutadiene) to synthesize nano- Al / HTPB energetic composite particles, the energetic composite particles solve the problem of nano-Al coating and compatibility of propellant components, but the comprehensive performance of propellant can still be further improved

Method used

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  • Nanometer Al/Ni/hydroxyl-terminatedpoly butadiene (HTPB) nucleus-shell structure energetic composite particle and preparation method thereof for solid propellant

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Embodiment 1

[0036] A nano Al / Ni / HTPB core-shell structure energetic composite particle for solid propellant and a synthesis method thereof, comprising the following steps:

[0037](1) Preparation of nano-Al / Ni composite particles: In a glove box, under a nitrogen atmosphere, disperse 0.514g of nano-Al into ether solution, after heating to 36 ° C, the acetylacetone contained in a constant pressure separatory funnel Nickel (0.116g) ether solution was added into the three-necked flask at a rate of 1-3 drops / second, and the stirring reaction was continued for 12 hours.

[0038] (2) Preparation of nano-Al / Ni / HTPB composite particles: Add the ether solution of HTPB (0.080g) in the constant pressure separatory funnel dropwise into the three-necked flask at the same speed, continue stirring for 12h, evaporate The solvent gave a solid powder.

[0039] Fesem as figure 1 shown. The results show that the composite particles are spherical particles with a three-layer core-shell structure, and the p...

Embodiment 2

[0041] A nano Al / Ni / HTPB core-shell structure energetic composite particle for solid propellant and a synthesis method thereof, comprising the following steps:

[0042] (1) Preparation of nano-Al / Ni composite particles: disperse 0.500g of nano-Al into the toluene solution that has been dewatered, connect the Schulent line, and after the system is vacuumed and argon is circulated for three times, the argon atmosphere is maintained. Heat the system to 110°C, and add the ethylene glycol dimethyl ether solution of nickel acetylacetonate (0.080g) in a constant pressure separating funnel into the three-necked flask at a rate of 1-3 drops / second under stirring conditions , Stir the reaction for 8h.

[0043] (2) Preparation of nano-Al / Ni / HTPB composite particles: Add the toluene solution of HTPB (0.090g) into the three-necked flask at the same speed. Stirring was continued for 4h, and the solvent was evaporated to obtain a solid powder.

Embodiment 3

[0045] A nano Al / Ni / HTPB core-shell structure energetic composite particle for solid propellant and a synthesis method thereof, comprising the following steps:

[0046] (1) Preparation of nano-Al / Ni composite particles: disperse 0.507g of nano-Al into ethanol solution, connect the Schulente line, vacuumize the system and pass nitrogen for three cycles, maintain the nitrogen atmosphere, and heat the system to 80°C Under the condition of stirring, the ethanol solution of nickel acetate (0.076g) in the constant pressure separatory funnel was added into the three-necked flask at a rate of 1-3 drops / second, and the reaction was stirred for 8h.

[0047] (2) Preparation of nano-Al / Ni / HTPB composite particles: Add the ether solution of HTPB (0.090g) into the three-necked flask at the same speed. Stirring was continued for 2 h, and the solvent was evaporated to obtain a solid powder.

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Abstract

The invention discloses nanometer Al / Ni / hydroxyl-terminatedpoly butadiene (HTPB) nucleus-shell structure energetic composite particle and a preparation method thereof for solid propellant. The composite particle is a three-layer nucleus-shell structure composite material. The preparation method comprises the steps: using Al power as a nucleus, and Ni as a shell, covering the Al power for first time, and preparing nanometer Al / Ni composite particle; and covering the nanometer Al / Ni composite particle for the second time by using HTPB, and preparing nanometer Al / Ni / HTPB composite particle. Due to the fact the Ni and the HTPB are used for covering the Al powder, oxidation of nanometer Al can be effectively prevented, and activity of the nanometer Al can be maintained. Covering materials are all formula components of the propellant, so that energetic particle structure is optimized, and problem that propellant is bad in compatibility in an application process is solved.

Description

technical field [0001] The invention relates to an energetic composite material and a preparation method thereof, in particular to a nano Al / Ni / HTPB three-layer core-shell structure energetic composite particle and a preparation method thereof. Background technique [0002] In measuring the performance of propellants and explosives, combustion performance and energy characteristics become the main indicators. Aluminum powder is widely used in this field due to its advantages of low-temperature oxidation, high heat release performance, and abundant and easy-to-obtain raw materials, and has become an important energetic material. Among them, aluminum powder accounts for about 20% of the solid propellant. A large number of studies have shown that the combustion of micron aluminum powder has to go through two processes: melting and endothermic (about 660°C) and then burning and exothermic (about 1000°C), while nano-aluminum powder burns violently at a lower temperature (about 5...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/24C06D5/00
Inventor 马振叶赵凤起徐娟肖立柏徐司雨樊学忠查明霞
Owner NANJING NORMAL UNIVERSITY
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