System and method for preparing high polymer bonded explosive based on microfluidics

Abstract

The invention belongs to the field of preparation of initiating explosive devices, and particularly relates to a preparation system and method of a high polymer bonded explosive based on microfluidics. Comprising a computer control unit, a fluid driving unit, a three-dimensional chaos convection type micro-mixer, a microscopic observation system and a product collecting unit, a fluid driving unit drives a dimethyl sulfoxide solvent dissolved with hexanitrostilbene and a binder and a deionized water anti-solvent to be respectively driven and collected to a three-dimensional chaos convection type micro-mixer to generate a hexanitrostilbene-based high polymer bonded explosive suspension, and the hexanitrostilbene-based high polymer bonded explosive suspension flows into a product collecting unit; and the microscopic observation system is used for observing the growth condition of the crystal. The hexanitrostilbene high polymer bonded explosive prepared by reasonably designing experimental conditions and operating parameters based on a microfluidic technology is narrow in crystal particle size distribution, uniform in crystal morphology and high in binding agent coating degree, large-capacity mixing preparation of a traditional preparation process is avoided, and danger in the preparation process is reduced.

Description

technical field [0001] The invention belongs to the field of pyrotechnics preparation, and in particular relates to a preparation system and method of high polymer bonded explosives based on microfluidics. Background technique [0002] Polymer Bonded Explosives, PBX for short, is a mixed explosive made by bonding high-energy single-component explosives and other components with polymers as binders. It has the advantages of high energy, low mechanical sensitivity, good mechanical properties and processing properties, etc. It is mainly used in anti-tank missiles, aerial bombs, mines, torpedoes and nuclear warheads. It is also widely used in industry. [0003] In actual use, in order to improve the impact initiation performance of explosives, higher requirements are put forward for the crystal shape, particle size, particle size distribution formability and fluidity of polymer bonded explosives. [0004] Hexanitrostilbene, scientific name is 2,2',4,4'6,6'-hexanitrostilbene, ab...

AI Technical Summary

Problems solved by technology

However, due to the difficulty of precise control of the reaction parameters and environment of conventional macro-reactors, the quantitative coating of nano-hexanitrostilbene particles cannot be achieved at the micro-scale, resulting in a wide particle size distribution of the prepared polymer bonded explosives. , the crystal shape is difficult to control, the coating degree is low, and the thermal performance is unstable

At the same time, the macro-reactor consumes a lot of samples, and it is difficult to quickly screen out the optimal reaction parameters

This also causes a large amount of waste medicine to be produced in the preparation process, which increases the risk of explosion

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