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Active microfluidic platform-based CL-20 crystal form control method

A CL-20, crystal form control technology, applied in chemical instruments and methods, single crystal growth, single crystal growth, etc., can solve problems such as high sensitivity, impact on application value, crystal form transformation, etc., and achieve short residence time , Narrow particle size distribution and uniform crystal morphology

Inactive Publication Date: 2019-12-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sensitivity of CL-20 is high, and the crystal transformation between various crystal forms is easy to occur, which affects its application value

Method used

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  • Active microfluidic platform-based CL-20 crystal form control method
  • Active microfluidic platform-based CL-20 crystal form control method
  • Active microfluidic platform-based CL-20 crystal form control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: the preparation of acicular CL-20

[0043]The needle-shaped CL-20 explosive was prepared by using the crystal form control system of CL-20 explosive based on microfluidic technology. Needle-like CL-20 explosives were prepared with acetone as solvent, deionized water as non-solvent, and PVP10 and CTAB as surfactants. 203mg CL-20 and 20mg PVP10 were dissolved in 5mL of acetone solvent, placed in a syringe, driven by a steady flow drive device syringe pump, the flow rate was set to 5mL / min, CTAB was dissolved in deionized water to form a non-solvent solution with a concentration of 0.0005M, the non-solvent solution is driven by an oscillating drive device, the driving pressure is 260kPa, and the flow rate is 19.8mL / min. The recrystallization temperature was set at 25 °C. Turn on the switch of the drive unit, the solvent solution and the non-solvent solution are respectively driven by the steady flow drive device and the oscillating flow drive device, and fl...

Embodiment 2

[0044] Embodiment 2: the preparation of flake CL-20

[0045] The flaky CL-20 explosive was prepared by using the crystal form control system of CL-20 explosive based on microfluidic technology. Using ethanol as solvent, deionized water as non-solvent, and PVP10 and CTAB as surfactants, flake CL-20 explosives were prepared. Dissolve 16mg of CL-20 and 2mg of PVP10 in 10mL of ethanol solvent, place it in a syringe, and drive it with a steady flow drive device, the injection pump, with a flow rate of 5mL / min. CTAB is dissolved in deionized water to form a non-solvent solution with a concentration of 0.0005M, the non-solvent solution is driven by an oscillating drive device, the driving pressure is 260kPa, and the flow rate is 19.8mL / min. The recrystallization temperature was set at 25 °C. Turn on the switch of the drive unit, the solvent solution and the non-solvent solution are respectively driven by the steady flow drive device and the oscillating flow drive device, and flow i...

Embodiment 3

[0046] Embodiment 3: the preparation of polygonal CL-20

[0047] Polygonal CL-20 explosives were prepared by using the crystal shape control system of CL-20 explosives based on microfluidic technology. Polygonal CL-20 explosives were prepared with DMSO as solvent, deionized water as non-solvent and CTAB as surfactant. Dissolve 380mg of CL-20 in 2mL of DMSO solvent, place it in a syringe, and drive it with a steady flow drive device, the injection pump, with a flow rate of 3mL / min. Dissolve CTAB in deionized water to form a non-solvent solution with a concentration of 0.0005M. The non-solvent solution is driven by an oscillating drive device with a driving pressure of 260kPa and a flow rate of 19.8mL / min. The recrystallization temperature was set at 25 °C. Turn on the switch of the drive unit, the solvent solution and the non-solvent solution are respectively driven by the steady flow drive device and the oscillating flow drive device, and flow into the double vortex mixer, a...

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Abstract

The invention belongs to the field of preparation of an energetic material and particularly relates to an active microfluidic platform-based CL-20 crystal form control method. An active microfluidic platform comprises an oscillatory flow driving unit, a steady flow driving unit, a recrystallization unit and a sample collecting unit. The method particularly comprises the following steps: putting anonsolvent solution into a sealing tank and putting a solvent solution into the steady flow driving unit; setting recrystallization temperature and pressure value and enabling the nonsolvent to flow towards a micro-mixer; setting parameters of the steady flow driving unit and enabling the solvent solution to flow towards the micro-mixer; collecting turbid liquid flowing out of the micro-mixer intothe sample collecting unit, and performing washing, suction filtration and drying to obtain CL-20 explosive particles; and changing experiment conditions and repeating the above steps until obtainingCL-20 explosives with different crystal appearance. The CL-20 explosive is prepared by the microfluidic platform, the structure is simple and small-dosage preparation can be realized; and furthermore, the experiment conditions are easy to adjust and the method is suitable for optimizing and screening the experiment parameters in the control process of the CL-20 explosive crystal form.

Description

technical field [0001] The invention belongs to the field of energetic material preparation, and in particular relates to a crystal form control method of CL-20 based on an active microfluidic platform. Background technique [0002] Hexanitrohexaazaisowurtzitane (CL-20) has high energy and good comprehensive properties, and is currently one of the most promising elemental explosives. Due to its high density and high energy characteristics, it has a tendency to gradually replace HMX in the fields of energetic material propellants, mixed explosives, and propellants. However, the sensitivity of CL-20 is high, and the crystal transformation between various crystal forms is easy to occur, which affects its application value. With the in-depth research on high-energy insensitive single-substance explosives, more and more attention has been paid to the influence of the morphology and quality of explosive crystals on performance, and higher requirements have been put forward for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/54C30B7/10C30B29/64C30B29/62C30B29/60C06B25/34
CPCC06B25/34C30B7/10C30B29/54C30B29/60C30B29/62C30B29/64
Inventor 朱朋石锦宇沈瑞琪叶迎华吴立志张伟胡艳
Owner NANJING UNIV OF SCI & TECH
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