HMX explosive microsphere containing cross-linked fluorine polymer coating layer and preparation method of HMX explosive microsphere

A technology of fluoropolymer and coating layer, which is applied in the field of composite material preparation, can solve the problems of incomplete coating of HMX and difficult further improvement of safety performance, and achieve the effect of inhibiting large-scale agglomeration, improving interface performance and maintaining energy level

Active Publication Date: 2021-03-09
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the above-mentioned problems of the prior art, to provide a kind of HMX explosive microsphere containing cross-linked fluoropolymer coating and its preparation method, the HMX explosive microsphere containing cross-linked fluoropolymer coating The spheres are prepared by combining emulsified solvent

Method used

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  • HMX explosive microsphere containing cross-linked fluorine polymer coating layer and preparation method of HMX explosive microsphere
  • HMX explosive microsphere containing cross-linked fluorine polymer coating layer and preparation method of HMX explosive microsphere
  • HMX explosive microsphere containing cross-linked fluorine polymer coating layer and preparation method of HMX explosive microsphere

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Experimental program
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Effect test

Embodiment 1

[0034] Containing the preparation method of the HMX explosive microsphere of 5.0wt% cross-linked fluoropolymer coating layer:

[0035] Step 1: Weigh 0.5g of functionalized carboxyl-terminated fluorocarbon prepolymer (number-average molecular weight is 2000g / mol, carboxyl content is 1.05mmol / g) and add it to 25g of ethyl acetate, stir at room temperature 25°C and 400rpm until completely dissolved, set aside. Weigh 10.0 g of fine-grained HMX particles (average particle size: 9.9 μm), add it into the functionalized carboxyl-terminated fluorocarbon prepolymer solution, and stir at 400 rpm to form an oil phase suspension.

[0036] Step 2: Slowly add the oil phase suspension in Step 1 to 280 g of water phase containing 2.5% OP-10 and 2.5% PVA under mechanical stirring at 1500 rpm, and emulsify for 30 minutes to form uniform emulsion droplets.

[0037] Step 3: Maintain a stirring speed of 1500rpm, and add 0.74g of HD-100 curing agent dropwise to the emulsion system (the equivalent r...

Embodiment 2

[0041] Containing the preparation method of the HMX explosive microsphere of 10.0wt% cross-linked fluoropolymer coating layer:

[0042] Step 1: Weigh 1.0 g of functionalized carboxyl-terminated fluorocarbon prepolymer (number average molecular weight is 2000 g / mol, carboxyl content is 1.05 mmol / g) and add it to 25 g of ethyl acetate, stir at room temperature 25°C and 400 rpm until completely dissolved, set aside. Weigh 10.0 g of fine-grained HMX particles (average particle size: 9.9 μm), add it into the functionalized carboxyl-terminated fluorocarbon prepolymer solution, and stir at 400 rpm to form an oil phase suspension.

[0043] Step 2: Slowly add the oil phase suspension in Step 1 to 280 g of water phase containing 2.5% OP-10 and 2.5% PVA under mechanical stirring at 1500 rpm, and emulsify for 30 minutes to form uniform emulsion droplets.

[0044] Step 3: Maintain a stirring speed of 1500rpm, and add 1.47g of HD-100 curing agent dropwise to the emulsion system (the equiva...

Embodiment 3

[0048] Containing the preparation method of the HMX explosive microsphere of 15.0wt% cross-linked fluoropolymer coating layer:

[0049] Step 1: Weigh 1.5g of functionalized carboxyl-terminated fluorocarbon prepolymer (the number average molecular weight is 2000g / mol, and the carboxyl content is 1.05mmol / g) and add it to 25g of ethyl acetate, and stir at room temperature at 25°C and 400rpm until completely dissolved, set aside. Weigh 10.0 g of fine-grained HMX particles (average particle size: 9.9 μm), add it into the functionalized carboxyl-terminated fluorocarbon prepolymer solution, and stir at 400 rpm to form an oil phase suspension.

[0050] Step 2: Slowly add the oil phase suspension in Step 1 to 280 g of water phase containing 2.5% OP-10 and 2.5% PVA under mechanical stirring at 1500 rpm, and emulsify for 30 minutes to form uniform emulsion droplets.

[0051] Step 3: Maintain a stirring speed of 1500rpm, and add 2.21g of HD-100 curing agent dropwise to the emulsion syst...

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Abstract

The invention belongs to the technical field of composite material preparation, and discloses an HMX explosive microsphere containing a cross-linked fluorine polymer coating layer and a preparation method of the HMX explosive microsphere. The HMX explosive microsphere containing the cross-linked fluorine polymer coating layer is of a structure with fine-grained HMX particles as a core and a cross-linked fluorine polymer as a shell. The average particle size of the HMX explosive microsphere containing the cross-linked fluorine polymer coating layer is 100 [mu]m-500 [mu]m, wherein the average particle size of the fine-grained HMX particles is 500 nm to 50 [mu]m, the cross-linked fluorine polymer coating layer accounts for 5%-15% of the HMX explosive microsphere containing the cross-linked fluorine polymer coating layer in percentage by mass, the impact sensitivity characteristic drop height of the HMX explosive microsphere containing the cross-linked fluorine polymer coating layer is 52.8-87.9 cm, and the friction sensitivity of the HMX explosive microsphere containing the cross-linked fluorine polymer coating layer is 12-48%. The preparation method disclosed by the invention integrates an emulsifying solvent evaporation coating technology and an in-situ polymerization coating technology.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a HMX explosive microsphere containing a cross-linked fluoropolymer coating layer and a preparation method thereof. Background technique [0002] Nitramine explosives such as cyclotrimethyltrinitramine (RDX), cyclotetramethylenetetranitroamine (HMX), and hexanitrohexaazaisopentazane (CL-20) have high energy density and can Significantly improve the specific impulse of the solid rocket motor charge and the working ability of the warhead charge, thereby improving the long-range strike and efficient damage capabilities of missile weapons, which have been widely used in weapons. However, nitramine explosives have high sensitivity (impact sensitivity, friction sensitivity, electrostatic spark sensitivity, etc.) and poor safety, which brings certain safety risks to weapons and ammunition in the process of preparation, transportation and storage. Coat...

Claims

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Application Information

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IPC IPC(8): C06B25/34C06B45/22C06B23/00
CPCC06B25/34C06B45/22C06B23/005
Inventor 张天福李洋庞爱民吴世曦王鹏李忠友姚南
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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