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Energetic microfiber and preparation method thereof

A microfiber and metal technology is applied in the field of energetic microfibers and their preparation, which can solve the problems of affecting the catalytic effect of nanoparticles on the combustion performance of nitrocellulose, inconspicuous improvement in energy, and restricting applications, and achieve uniform and controllable diameters. , the effect of improving combustion performance and increasing energy density

Inactive Publication Date: 2014-03-05
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple to operate, and the catalytic effect of inorganic nanoparticles is used to improve the combustion performance of nitrocellulose, but the energy improvement of a single nanoparticle is not obvious
In addition, there is water in the mixed solvent they used, which is easy to chemically react with nano-metal particles with relatively high activity, which affects the catalytic effect of nanoparticles on the combustion performance of nitrocellulose, which limits its application in the field of micro-devices

Method used

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  • Energetic microfiber and preparation method thereof
  • Energetic microfiber and preparation method thereof
  • Energetic microfiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Under room temperature conditions, nitrocellulose is dissolved in the mixed solvent of acetone / N, N-dimethylacetamide (the volume ratio of acetone and N, N-dimethylacetamide is 1:0.5), and the concentration is 10wt % electrospinning solution about 10mL.

[0033] refer to figure 1 , at room temperature, inject the above electrospinning solution into the sampling tube, and the metal needle at the front end of the sampling tube is connected to the high voltage power supply 1 . Turn on the high-voltage power supply 1, set its value to 25kv, and the propulsion speed of the propulsion pump 2 to propel the syringe 3 is 8mL / h. Under the action of the electrostatic field force, the above-mentioned electrospinning solution is continuously stretched during the process of "flying" from the positively charged needle to the negatively charged rotating collection device 4, while the solvent volatilizes, and finally the aluminum wire at a distance of 20 cm from the needle Obtain nitr...

Embodiment 2

[0035] First, the nanoscale Al / Fe 2 o 3 The particles were placed in a cyclohexane solution at a molar ratio of 2:1, mixed ultrasonically and then dried in a vacuum oven. Then, the nitrocellulose and the above-mentioned vacuum-dried nano-scale Al / Fe 2 o 3 The particles were added to a mixed solvent of acetone / N, N-dimethylacetamide (the volume ratio of acetone and N, N-dimethylacetamide was 1:0.5), and the electrospinning solution with a concentration of 10wt% was prepared as about 10mL. where Al / Fe 2 o 3 (MIC):nitrocellulose=3:10 (mass ratio).

[0036] refer to figure 1 , at room temperature, inject the above electrospinning solution into the sampling tube, and the metal needle at the front end of the sampling tube is connected to the high voltage power supply 1 . Turn on the high-voltage power supply 1, set its value to 25kv, and the propulsion speed of the propulsion pump 2 to propel the syringe 3 is 8mL / h. Under the action of the electrostatic field force, the abo...

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Abstract

The invention discloses an energetic microfiber, which is prepared by metal / metallic oxide nano-particle (MIC) and nitrocotton by an electrostatic spinning method. The invention further discloses a preparation method of the energetic microfiber. The preparation method comprises the following steps of: adding the metal / metallic oxide nano-particle (MIC) and the nitrocotton into mixed solvent to prepare an electrostatic spinning solution, and preparing microfiber by an electrostatic spinning device. According to the energetic microfiber, the energetic catalyst, namely the metal / metallic oxide nano-particle (MIC) is added into the electrostatic spinning solution of the nitrocotton, so that the combustion performance and the energy intensity of the nitrocotton can be effectively improved; the organic reagents are used as the mixed solvent, so that the reaction between the inorganic nano-particle and water molecules is prevented; the MIC is firstly made into the microfiber, so that the existence form of the MIC is increased; and the diameter of the metal / metallic oxide nano-particle (MIC) and the nitrocotton is even and controllable, so that the energetic microfiber is suitable for the design requirement of the microdevice, and can be used for the fields such as the micro-propellant, the micro-exploder, etc.

Description

technical field [0001] The invention relates to an energetic microfiber and a preparation method thereof, belonging to the technical field of energetic material preparation. Background technique [0002] In the early days, thermite mainly refers to Al and Fe 2 o 3 A mixture prepared in a certain proportion is used as an ignition agent. With the deepening of research, the concept of thermite has been further promoted, and its scope has become a mixture or composite of metals and metal oxides or non-metal oxides, such as CuO, MoO 3 other oxides instead of Fe 2 o 3 The mixture obtained with Al in a certain proportion can also be called thermite. The thermite reaction is a highly exothermic reaction and thus has many uses such as the destruction of military targets and ammunition, arson weapons, cutters and welders, etc. Due to the relatively large particle size of the oxidizing agent and reducing agent in traditional thermite, there is separation between the particles, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/26D01F1/10D01D5/00
Inventor 李瑞杨光成徐红梅沈金朋谯志强
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS