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Method of reducing laser ignition energy

A laser ignition and energy technology, which is applied in the direction of weapon accessories, blasting barrels, fuzes, etc., can solve the problems of reducing laser ignition energy, difficulty in safety control and stabilization measures, general light absorption performance, etc., and achieve the effect of improving the effect of secondary heating

Inactive Publication Date: 2021-04-27
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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Problems solved by technology

However, the light-absorbing properties of some energetic materials are relatively general, resulting in high laser ignition energy. At present, a small amount of photothermal conversion materials with better light-absorbing properties, such as graphite or carbon black, is mainly added to the energetic materials to increase the absorbance and Reduce laser ignition energy
At present, the regulation of laser photothermal ignition energy is mainly realized by modifying the energetic powder itself. Since the energetic material itself is a metastable substance, its modification process may lead to reactivity, stability, sensitivity and safety. changes in the environment, bringing new difficulties to its security controls and stabilization measures

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  • Method of reducing laser ignition energy
  • Method of reducing laser ignition energy

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Effect test

Embodiment 1

[0031] Dissolve 100 mg of graphite oxide in 20 ml of deionized water, followed by gentle sonication for 10 min in an ultrasonic water bath. A clean aqueous dispersion of graphene oxide at a concentration of 5 mg / ml was then formed and ready for vacuum filtration. During vacuum filtration, a GO thin film (GOM) was automatically formed on the upper side of the filter paper. The filter paper has a pore size of 0.45 μm. Self-supporting GO films were obtained by dissolving filter paper in acetone and then drying in a vacuum oven at 60 °C. The energetic material grains are prepared by using the commonly used laser photothermal ignition of the energetic material boron / potassium nitrate mixture. First, the boron / potassium nitrate mixture powder is pressed into a certain size and height of the energetic material grains, and then the graphene-based self-supporting The energetic film and the grain of the energetic material are closely bonded, and they are assembled together into the la...

Embodiment 2

[0034] 120mg of graphene oxide was dispersed in 40ml of water and 20ml of ethanol at room temperature. Then, 86 mg of 3-aminophenol, 200 µl of ammonia solution and 86 µl of formaldehyde solution were added to the above solution. After stirring for 20 h, GO / 3AF was formed and the membrane was obtained by vacuum filtration process. During the filtration, using 10 ml of the above aqueous dispersion, a separate membrane will be formed automatically on the upper side of the filter paper with a pore size of 0.45 μm. The GO / 3AF self-supporting energetic film was directly attached to the surface of the energetic grain. Figure 4 For the comparison of the temperature rise effect of GO, GO@3AF, and 3AF under the action of laser pulses, it can be seen that the photothermal conversion performance of the energetic grain column added with GO@3AF film has been significantly improved.

Embodiment 3

[0036] GO and PTFE composite free-standing membranes were prepared by mixing GO and PTFE in aqueous solution, followed by sonication and filtration. The GO / PTFE composite film is closely attached to the energetic material grain, and the ignition energy of the laser tube explosion under the condition of the self-supporting energetic film before and after the addition of PTFE is compared to study the effect of the addition of PTFE on the regulation of the laser light by the self-supporting energetic film. The effect of hot ignition energy. Such as Figure 8 As shown, the addition of GO / PTFE composite film effectively reduces the threshold power of laser ignition.

[0037] By monitoring the temperature rise of a series of GO / PTFE self-supporting energetic films during pulsed laser irradiation, the effect of the ratio of GO and PTFE on the temperature rise effect under laser irradiation was studied. Such as Figure 5As shown, pure PTFE shows very low photothermal temperature ri...

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Abstract

The invention discloses a method for reducing laser ignition energy of an energetic material, which comprises the following steps: preparing a self-supporting film from a photothermal conversion material with a two-dimensional lamellar nanostructure, and directly attaching the self-supporting film to an energetic grain; the photothermal conversion material comprises graphene oxide, a graphene oxide 3-aminophenol formaldehyde compound, a graphene oxide polytetrafluoroethylene compound and an MXene polytetrafluoroethylene compound. According to the method, the photo-thermal conversion efficiency of a laser ignition device can be enhanced, so that the triggering energy of laser photo-thermal ignition is reduced.

Description

technical field [0001] The invention relates to the field of laser photothermal ignition, in particular to a method for reducing laser ignition energy. Background technique [0002] Laser photothermal ignition refers to the process of using laser light to irradiate photothermal conversion materials to instantly generate high-energy heat to ignite or detonate energetic materials. It has important application value in the fields of military aerospace and civil ignition and blasting. Laser photothermal ignition energy is one of the key indicators of laser photothermal ignition. Reducing the energy of laser photothermal ignition can effectively alleviate the high performance and quality requirements of energy output devices and optical fiber components, reduce manufacturing costs, realize lightweight weapon systems, increase the mobility of weapon systems, and promote their upgrading. However, the light-absorbing properties of some energetic materials are relatively general, re...

Claims

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Application Information

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IPC IPC(8): C06B31/02F42B3/113F42C13/02
CPCC06B31/02F42B3/113F42C13/02
Inventor 张龙邓涵月朴俊宇唐舵王亮
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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