Preparation method of nano Al/ RDX energy-containing composite particles with core-shell structures

A composite particle, shell structure technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of easy oxidation of nanometer Al, and achieve the improvement of compatibility, prevention of oxidation, and improvement of activity. Effect

Inactive Publication Date: 2015-04-08
NANJING NORMAL UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of preparation method of nanometer Al / RDX core-shell structure energy-containing composite particle, has overcome the potential influence that introduces non-formulation composition coating existence in the existing method, selects the formula composition RDX of propellant to prepare The produced nano-Al powder is directly coated in situ, and the surface RDX layer effectively solves the problem of extremely easy oxidation of nano-Al, which can effectively prevent the oxidation of nano-Al powder and improve the activity of nano-Al and other components of the propellant. Compatibility

Method used

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  • Preparation method of nano Al/ RDX energy-containing composite particles with core-shell structures
  • Preparation method of nano Al/ RDX energy-containing composite particles with core-shell structures
  • Preparation method of nano Al/ RDX energy-containing composite particles with core-shell structures

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Effect test

Embodiment 1

[0035] A preparation method of nano Al / RDX core-shell structure energetic composite particles, the steps are as follows:

[0036] 1. At room temperature, add 0.005mol anhydrous AlCl 3 Dispersed in 60ml of toluene solution, under vigorous stirring, 0.02mol of N(Et) 3 Add to AlCl at a rate of 1-2 drops / sec 3 in the toluene solution. AlCl to be solid 3 After dissolving, slowly add 0.0015mol LiAlH 4 Add it into the system, continue to stir and react for 12 hours, and then centrifuge (rotating speed is 5000-8000 rpm, time is 2-20min) to obtain the upper layer of AlH 3 ·N(Et) 3 Serum.

[0037] 2. AlH 3 ·N(Et) 3 Put the solution into a three-necked flask with a constant pressure separatory funnel, put 5mL of RDX saturated acetone solution into the constant pressure separatory funnel, move it into the Schulent line, vacuumize the system, and circulate nitrogen three times to maintain nitrogen atmosphere. AlH 3 ·N(Et) 3 The solution was heated to 110°C.

[0038] 3. Measure 0...

Embodiment 2

[0041] A preparation method of nano Al / RDX core-shell structure energetic composite particles, the steps are as follows:

[0042] 1. At 30°C, add 0.01mol anhydrous AlCl 3 Dispersed in 100ml of ether solution, under vigorous stirring, 0.04mol of N(Et) 3 Add to AlCl at a rate of 1-2 drops / sec 3 in ether solution. AlCl to be solid 3 After gradually dissolving, slowly add 0.03mol of LiAlH 4 Add it into the system, continue to stir and react for 16 hours, and then centrifuge (rotating speed is 5000-8000 rpm, time is 8-15min) to obtain the upper layer of AlH 3 ·N(Et) 3 Serum.

[0043] 2. AlH 3 ·N(Et) 3 Put the solution into a three-neck flask with a constant pressure separating funnel, put 10ml of RDX saturated DMF solution into the constant pressure separating funnel, and connect it to the Schrente line.

[0044] 3. Under the protection of argon atmosphere and stirring, measure 0.02mL of titanium tetrachloride and quickly inject it into the three-necked flask with a syring...

Embodiment 3

[0047] A preparation method of nano Al / RDX core-shell structure energetic composite particles, the steps are as follows:

[0048] 1. At room temperature, add 0.01mol anhydrous AlCl 3 Dispersed in 80ml of ether solution, 0.04mol of N(C 4 h 8 )CH 3 Add to AlCl at a rate of 1-2 drops / sec 3 in ether solution. Solid state AlCl 3 After dissolving, slowly add 0.03mol LiAlH 4 Add it into the system, continue to stir and react for 24 hours, and then centrifuge (rotating speed is 5000-8000 rpm, time is 8-15min) to obtain the upper layer of AlH 3 ·N(C 4 h 8 )CH 3 Serum.

[0049] 2. AlH 3 ·N(C 4 h 8 )CH 3 Put the solution into a three-necked flask with a constant pressure separating funnel, put 10mL of RDX saturated cyclohexane solution into the constant pressure separating funnel, and connect it to the Schlenk line.

[0050] 3. Under nitrogen atmosphere, under stirring, quickly inject 0.05ml of titanium tetrachloride into the three-neck flask with a syringe, the system tur...

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Abstract

The invention relates to a preparation method of nano Al / RDX energy-containing composite particles with core-shell structures. The preparation method comprises three steps: (1) preparing a precursor: synthesizing AlH3. NR1R2R3 precursor by a chemical method; (2) generating nano Al: at a certain temperature, performing catalytic decomposition on the precursor to obtain nano Al particles; and (3) preparing nano Al / RDX composite particles: by an in-situ solvent-antisolvent method, directly coating the prepared nano Al with the precipitated RDX to synthesize the nano Al / RDX engery-containing composite particles with the core-shell structures. The generated nano Al is directly coated in situ with the oxidant RDX which is a main component of a propellant, so that the oxidation of the nano Al can be effectively prevented and the activity of the nano Al is maintained; and the surface RDX is a component in the formulation of an application system, so that the synergistic effect between the nanocomposite particles can improve the compatibility between the nano Al particles and other components.

Description

technical field [0001] The invention relates to a preparation method of a nano energetic composite material, in particular to a preparation method of a nano Al / RDX core-shell structure energetic composite particle. Background technique [0002] Metal powders have been widely used in energetic materials due to their advantages of increasing energy, improving detonation heat and working ability, and improving ignition performance. Al powder has become the preferred metal combustion agent in explosives and propellants because of its high calorific value, relatively low oxygen consumption, and wide source. Studies have shown that the particle size and activity of Al powder have a great influence on the comprehensive performance of the propellant. The smaller the particle size, the larger the specific surface area and the higher the specific surface energy, showing new and excellent properties in the macro and micro. Therefore, the research on the application of ultrafine Al po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/30B82Y30/00B82Y40/00
Inventor 马振叶赵凤起徐娟徐司雨肖立柏仪建华查明霞
Owner NANJING NORMAL UNIVERSITY
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