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Method for improving heat conduction performance of mixed explosive

A technology of thermal conductivity and mixed explosives, which is applied in the direction of non-explosive/non-thermal agent components, explosives, non-explosive fillers/gelling agents/thickeners, etc., which can solve the problem that the efficiency of thermal conductivity is not high enough, the preparation method has not been reported, Problems such as the large amount of thermally conductive fillers are used to achieve the effects of easy scale-up and preparation, significant lifting effect, and improved thermal conductivity

Active Publication Date: 2019-08-30
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

At present, the main problems of these thermal conductivity improvement methods of polymer-based composite materials are: the amount of thermal conductivity filler is too large, the efficiency of thermal conductivity improvement is not high enough, the preparation process is complicated, and the cost is high.
[0008] The above technical inventions provide some reference ideas for improving the thermal conductivity of explosives. According to the existing public information, there is no report on the preparation method of using Chinese ink as a filler to improve the thermal conductivity of mixed explosives.

Method used

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  • Method for improving heat conduction performance of mixed explosive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 It is a process flow chart of a method for improving the thermal conductivity of mixed explosives of the present invention.

[0029] Weigh 0.5g of Huimo ink ingot, grind it with water in the inkstone, add 0.03g of polyvinyl alcohol and water, and then disperse it for 5min with ultrasound at a frequency of 20kHz to prepare 25g of ink suspension. Weigh 47.5g of 1,3,5-triamino-2,4,6-trinitrobenzene explosive, add 50g of water, and add 12.5g of prepared ink suspension, stir and disperse to form composite explosive suspension. Heat up to 60°C, add half of the binder solution containing 2g of fluororubber dropwise, and apply vacuum to remove the organic solvent. Then add the remaining 12.5g of ink suspension, and add dropwise the remaining half of the binder solution containing 2g of fluororubber, and continue to apply vacuum treatment to prepare explosive modeling powder, which is filtered, washed with water, dried, and pressed into medicine column, the mixed expl...

Embodiment 2

[0031] Weigh 4g of Huimo ink stick, grind it with water in the inkstone, add 0.4g of alkylphenol polyoxyethylene ether and water, and then disperse it for 15min with ultrasound at a frequency of 60kHz to prepare 80g of ink suspension. Weigh 190g of hexanitrohexaazaisopentazane explosive, add 200g of water, and add 50g of prepared ink suspension, stir and disperse to form composite explosive suspension. Heat to 60° C., add half of the binder solution containing 6 g of polyurethane dropwise, and apply vacuum to remove the organic solvent. Then add the remaining 30g of ink suspension, and drop the remaining half of the binder solution containing 6g of polyurethane, and continue to apply vacuum treatment to prepare explosive modeling powder, which is filtered, washed with water, dried, and pressed into a powder column. The mixed explosive with significantly improved thermal conductivity can be obtained. The thermal conductivity test was carried out by the laser flash method, and ...

Embodiment 3

[0033] Weigh 2.4g of Huimo ink stick, grind it with water in the inkstone, add 2.4 polyvinylpyrrolidone and water, and then disperse for 30min with ultrasound at a frequency of 80kHz to prepare 240g of ink suspension. Weigh 190g of Oktokin explosive, add 200g of water, and add 120g of prepared ink suspension, stir and disperse to form composite explosive suspension. The temperature was raised to 60° C., half of the binder solution containing 7.6 g of vinyl acetate cellulose was added dropwise, and vacuum was applied to remove the organic solvent. Then add the remaining 120g ink suspension, and drop the remaining half of the binder solution containing 7.6g vinyl acetate cellulose, continue to apply vacuum treatment, prepare explosive molding powder, filter, wash with water, dry, and By pressing it into a charge column, a mixed explosive with significantly improved thermal conductivity can be obtained. The thermal conductivity test was carried out by the laser flash method, and...

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Abstract

The invention discloses a method for improving heat conduction performance of a mixed explosive, and belongs to the technical field of energetic composite materials. The method comprises the followingsteps: step 1, adding water into an ink stick for grinding the ink stick in a inkstone, adding a proper amount of a surfactant, and carrying out ultrasonic dispersing to obtain an ink turbid liquid;and step 2, adding the ink turbid liquid into an explosive by two stages, dropwise adding a high polymer binder to prepare explosive molding powder by a water suspension granulation method, carrying out filtering, water washing and drying, and pressing the explosive molding powder into a reagent column to obtain the mixed explosive with heat conduction performance. According to the invention, a natural hybrid carbon nano material in the ink stick is used as heat conduction filler, and meanwhile, good adhesion capability of the natural hybrid carbon nano material is fully utilized, so that heatconduction performance of the mixed explosive is improved. The method disclosed by the invention has the advantages that the effect is remarkable, the preparation process is simple, amplification iseasy, universality is strong, and the method is suitable for all types of mixed explosives.

Description

technical field [0001] The invention relates to the technical field of energetic composite materials, in particular to a method for improving the thermal conductivity of mixed explosives. Background technique [0002] In high-performance mixed explosives (PBX) for weapons, due to the low thermal conductivity of explosive crystals and polymer binders, the interior of explosive components is very It is easy to generate a temperature gradient, resulting in uneven thermal expansion and thermal stress, which in turn leads to cracking or damage of the explosive, resulting in a reduction in its reliability and safety. By improving the thermal conductivity of mixed explosives and reducing thermal stress, it is the preferred strategy to enhance the thermal-physical environment adaptability of explosive components. However, how to select high-efficiency thermally conductive fillers, solve the problem of high-dispersion coating of fillers, and construct a thermally conductive network ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B25/02C06B25/34C06B25/36
CPCC06B23/00C06B23/001C06B25/02C06B25/34C06B25/36
Inventor 杨志剑潘丽萍张建虎林聪妹李玉斌赵煦
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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