Method for coating thermal expansion hollow microspheres with energy-containing additive

An additive and thermal expansion technology, applied in non-explosive/non-thermal agent components, non-explosive stabilizers, offensive equipment, etc., can solve the problems of hydrogen bubbles of different sizes, hidden safety hazards, and difficult to control, so as to improve the working ability , reduce sensitivity and prevent demulsification

Active Publication Date: 2018-08-03
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] CN201110277487.4 and CN201110277355.1 respectively disclose a titanium hydride type hydrogen storage emulsion explosive and a magnesium hydride type hydrogen storage emulsion explosive. The hydrogen storage material is added to the emulsion explosive as an energetic additive to improve the detonation performance of the explosive , the hydrogen bubbles produced by the decomposition of titanium hydride and magnesium hydride are of different sizes and are not easy to control, and the H in the sensitized bubbles 2 It is easy to escape, and there is a potential safety hazard; Ye Zhiwen et al. provided a paper "Sensitization of NL Organic Microspheres to Emulsion Explosives" (Mining and Metallurgy Engineering, 2012, 32(2): 23-25.) A method for making heat-expandable NL organic microspheres and its application in emulsion explosives. Heat-expandable microspheres with a core-shell structure are prepared by suspension polymerization. The core solvent is an alkane with a low boiling point, and the vaporization of the core solvent generates pressure to force the shell to expand. , but the heat-expandable NL organic microspheres can only act as sensitizers for emulsion explosives, and cannot be used as energetic

Method used

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  • Method for coating thermal expansion hollow microspheres with energy-containing additive
  • Method for coating thermal expansion hollow microspheres with energy-containing additive
  • Method for coating thermal expansion hollow microspheres with energy-containing additive

Examples

Experimental program
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Example Embodiment

[0029] Example 1

[0030] Polymer hollow microspheres wrapped hydrogen storage material TiH 2 Preparation method:

[0031] St1: Combine 0.2g sodium bicarbonate and 20g TiH 2 Add to the ball mill, the speed of the ball mill is 30rpm / min, the ball mill is 2h, after the ball mill is completed, the sodium bicarbonate particles are dispersed and coated on TiH 2 Particle surface.

[0032] St2: Add 3g of acrylonitrile, 1g of methyl acrylate, and 1g of vinyl acetate to a stirrer with heating function. After stirring and mixing uniformly, add 0.5% of the total monomer mass of the oil-soluble initiator azobisisobutyronitrile and 0.3 % Crosslinking agent polyethylene glycol 200 dimethacrylate, after stirring and mixing uniformly, the temperature is raised to 62°C for bulk polymerization. After pre-polymerization for 30 minutes, the temperature of the system is quickly reduced to 20°C with an ice bath. Add the energetic additive coated in St1 and stir thoroughly to make the coated energetic add...

Example Embodiment

[0035] Example 2

[0036] Preparation method of polymer hollow microspheres encapsulating Al powder:

[0037] St1: Add 0.5g of modified azodicarbonamide and 30g of Al powder to the ball mill, the speed of the ball mill is 60rpm / min, and the ball mill is 2h to complete the coating of the aluminum powder by the expansion agent.

[0038] St2: Add 4g of styrene, 3g of acrylonitrile, and 3g of vinylidene chloride monomer to a reactor with a stirrer and heating device. After stirring and mixing uniformly, add 1% of the total mass of the monomer, the oil-soluble initiator azo Diisobutyronitrile and 0.75% of the cross-linking agent trimethylolpropane triacrylate, stir and mix uniformly, heat up to 65°C for bulk polymerization, pre-polymerize for 1h, and quickly reduce the system temperature to 25°C with an ice bath. Add the energetic additive coated in St1 and stir thoroughly to make the energetic additive Al powder and prepolymer evenly mixed;

[0039] St3: configure 150ml Mg(OH) 2 The solu...

Example Embodiment

[0041] Example 3

[0042] Preparation method of polymer hollow microspheres coated boron powder:

[0043] St1: Add 0.6g of azodicarbonamide and 30g of boron powder to the ball mill, the speed of the ball mill is 45m / min, the ball mill is 2h, the expansion agent modified azodicarbonamide is dispersed and coated on the surface of the boron powder particles.

[0044] St2: Add 7g of acrylonitrile, 2g of methyl methacrylate, 1g of glycidyl methacrylate to the reactor with stirrer and heating device, stir and mix well, add 0.8% of the total monomer mass for oil-soluble initiator Add benzoyl peroxide and 1% crosslinking agent polyethylene glycol 400 dimethacrylate. After stirring and mixing uniformly, the temperature is raised to 90°C for bulk polymerization. Pre-polymerization is performed for 45 minutes, and the system temperature is quickly reduced to 30°C. , Add the energetic additive coated in St1, stir fully to make the energetic additive and the prepolymer mix uniformly;

[0045] St3...

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Abstract

The invention relates to an energy-containing sensitizing agent and in particular relates to thermal expansion hollow microspheres with an energy-containing additive and a production method thereof. The energy-containing sensitizing agent is prepared from the following components: 1 to 10 parts of expanding agent, 60 to 95 parts of energy-containing additive and 10 to 30 parts of polymer monomer.The production method comprises the following steps: firstly, adding the expanding gent and the energy-containing additive into a ball grinding mill according to a certain ratio and mixing to form scattered expanding agent particle coating on the outer surface of the energy-containing additive; finally, adding an oil-soluble initiator into the polymer monomer and carrying out body pre-polymerization at certain temperature to obtain a cross-linked pre-polymer with proper viscosity; adding the coated energy-containing additive into the cross-linked pre-polymer; after uniformly mixing, dispersing, suspending and polymerizing in a water phase; then raising the temperature and curing to obtain compound type energy-containing microspheres; finally, carrying out heating, foaming and expansion andcooling treatment to obtain the energy-containing additive coated with the hollow microspheres.

Description

technical field [0001] The invention relates to an energetic composite sensitizer, more specifically to an energetic additive coated with hollow microspheres, and in particular to a method for coating the energetic additive with thermally expanded hollow microspheres. Background technique [0002] Industrial explosives such as emulsion explosives, water-gel explosives, and ammonium oil explosives do not have detonator sensitivity without adding sensitizers, which provide hot spots for detonation in the explosives. The sensitization bubble is the sensitization center, and under a given impact detonation pressure, the heat generated by the rapid compression of the bubble accelerates the explosive reaction around the hot spot, making the detonation reaction continue. Sensitization technology is one of the key factors restricting the development of industrial explosive production technology, which directly affects its detonation performance and storage stability. Traditional se...

Claims

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Application Information

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IPC IPC(8): C06B23/00C06B27/00C06B45/18
CPCC06B23/003C06B23/006C06B23/009C06B27/00C06B45/18
Inventor 程扬帆方华刘文近宋诗祥苏健陶臣
Owner ANHUI UNIV OF SCI & TECH
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