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Nano-explosive preparation system and nano-explosive preparation method based on microfluidic technology.

A microfluidic technology and preparation system technology, applied in the field of nano-explosives preparation, can solve problems such as poor product performance, long cycle time, and complex preparation of nano-explosives, and achieve low environmental pollution, short research and development cycle, high-throughput screening and The effect of mass production

Active Publication Date: 2018-11-23
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of complex preparation of nano-explosives, long period and poor product performance in the prior art, the present invention provides a nano-explosive preparation and screening system based on microfluidic technology, and a nano-explosive preparation and screening method based on the system

Method used

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  • Nano-explosive preparation system and nano-explosive preparation method based on microfluidic technology.

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Embodiment 1

[0057] Embodiment 1: the preparation of nano-hexanitrostilbene

[0058] Preparation of nano-hexanitrostilbene by oscillating flow-steady flow driving unit. Nano-hexanitrostilbenes were prepared with dimethyl sulfoxide (DMSO) as solvent, deionized water as non-solvent and cetyltrimethylammonium chloride (CTAC) as surfactant. 50 mg of hexanitrostilbene raw material was dissolved in 2.5 mL of DMSO solvent, placed in syringe 13, driven by syringe pump 14, and the flow rate was set at 1.8 mL / min. CTAC was dissolved in deionized water to form a non-solvent solution with a concentration of 0.5%. The non-solvent solution was placed in a sealed tank 3, and the pressure regulator 2 controlled the pressure at 2.5 bar and the flow rate at 9 mL / min. The recrystallization temperature was set at 18 °C. Turn on the pressure regulator 2 switch, the pressure drives the non-solvent to flow to the oscillator, and from the oscillator to the recrystallization unit. Turn on the switch of the syri...

Embodiment 2

[0059] Embodiment 2: the preparation of nano RDX gold

[0060] Nano RDX was prepared by oscillating flow-steady flow driving unit. Using dimethyl sulfoxide (DMSO) as the solvent, deionized water as the non-solvent, and cetyltrimethylammonium chloride (CTAC) as the surfactant to prepare nano-RDX. Dissolve 100 mg of RDX in 2.5 mL of DMSO solvent, place in syringe 13, and be driven by syringe pump 14 with a flow rate of 1.1 mL / min. CTAC was dissolved in deionized water to form a non-solvent solution with a concentration of 0.1%. The non-solvent solution was placed in a sealed tank 3. The pressure regulator 2 controlled the pressure at 2.5 bar and the flow rate at 16.6 mL / min. The recrystallization temperature was set at 20 °C. Turn on the pressure regulator 2 switch, the pressure drives the non-solvent to flow to the oscillator, and from the oscillator to the recrystallization unit. Turn on the switch of the syringe pump 14 to drive the solvent 12 in the syringe 13 to transpor...

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Abstract

The invention relates to the field of initiating explosive devices, in particular to a nano-explosive preparation system and a nano-explosive preparation method based on the microfluidic technology. The system comprises a fluid driving unit, a recrystallization unit, a sample collection unit and a connection component; the fluid driving unit is used for driving solvents and non-solvent solutions;the recrystallization unit comprises a temperature control device and a microchip; the microchip comprises a micro-mixing structure; after the fluid driving unit drives the solvents and the non-solvent solutions to contact with the microchip, rapid mixing can be realized at a recrystallization temperature under the action of the micro-mixing structure to form suspensions; the sample collection unit is used for collecting the suspensions flowing out from the microchip; the connection component is sequentially connected with the fluid driving unit, the recrystallization unit and the sample collection unit. The nano-explosive preparation system and the nano-explosive preparation method have the advantages that the solvents and the non-solvent solutions are rapidly mixed to react to generate the suspensions through the temperature control device and the micro-mixing structure of the recrystallization unit, and the suspensions are washed, filtered and dried to obtain nano-explosives with uniform crystal forms, good crystal appearance and concentrated particle size distribution.

Description

technical field [0001] The invention relates to the field of pyrotechnic devices, in particular to a nano-explosive preparation system based on microfluidic technology and a method for preparing nano-explosives. Background technique [0002] As an energetic material, explosives are widely used in engineering blasting, aerospace, explosive forming, weapon systems, etc., and play a key role in promoting the progress of human society. The preparation of nano-explosives refers to reducing the particle size of explosives to nanoscale by physical or chemical methods. Due to the scale effect, the nano-explosive has suitable sensitivity and excellent explosive performance. Therefore, the preparation methods of nano-explosives have been extensively studied. However, the preparation of nano-explosives and the screening of experimental conditions require a large number of repeated experiments, which brings difficulties to the rapid preparation and screening of nano-explosives by exis...

Claims

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Application Information

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IPC IPC(8): C06B21/00C06B25/34C06B25/04B82Y30/00
CPCB82Y30/00C06B21/00C06B25/04C06B25/34
Inventor 夏焕明赵双飞朱朋沈瑞琪叶迎华
Owner NANJING UNIV OF SCI & TECH
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