Method for preparing energetic hollow microspheres by microwave heating method

A technology of microwave heating and microspheres, which is applied in the preparation of energetic hollow microspheres and the field of microwave heating to prepare energetic hollow microspheres, which can solve the problem of cracking, uneven heating of energetic hollow microspheres, and different particle sizes of microspheres to prevent demulsification, solve the contradiction between high power and high sensitivity, and improve storage stability

Inactive Publication Date: 2020-06-12
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two methods both use direct heating. Due to the existence of temperature gradients, it is easy to cause uneven heating of the energetic hollow microspheres, resulting in different particle sizes of the microspheres, and it often occurs that some microspheres are not foamed and some are regenerated. In case of excessive foaming and rupture

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  • Method for preparing energetic hollow microspheres by microwave heating method
  • Method for preparing energetic hollow microspheres by microwave heating method

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Experimental program
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Effect test

Embodiment 1

[0031] Ti H 2 The preparation method of type energetic hollow microspheres: the energetic hollow microspheres are mainly composed of the following components in parts by weight: 5 parts of wave-absorbing material polyaniline, 10 parts of expansion agent p-toluenesulfonyl hydrazide, energetic additive TiH 2 65 parts of powder, 20 parts of acrylate monomer.

[0032] The TiH 2 The preparation method of type energy-containing hollow microspheres, the specific steps are as follows:

[0033] St1: First mix and dissolve 20 parts of acrylate monomer, 1 part of initiator azobisisobutyronitrile, 0.1 part of crosslinking agent polyethylene glycol (200 / 400) dimethacrylate, 10 parts of expansion agent p-toluene Sulfonyl hydrazide forms the oil phase, and then 65 parts of energetic additive TiH with an average particle size of 15 μm are added 2 Powder and 5 parts of wave-absorbing material polyaniline and stir well to make it evenly mixed with the oil phase;

[0034] St2: In 91 parts of...

Embodiment 2

[0038] The preparation method of Al powder-type energetic hollow microspheres: the energetic hollow microspheres are mainly composed of the following components in parts by weight: 4 parts of wave-absorbing material polythiophene, 11 parts of expansion agent dichloromethane, and energetic additive Al 70 parts of powder, 15 parts of fluorine-containing acrylate monomer.

[0039] The preparation method of the Al powder type energetic hollow microspheres, the specific steps are as follows:

[0040] St1: First mix and dissolve 15 parts of fluorine-containing acrylate monomer, 1.5 parts of initiator tertiary amine, 0.2 parts of crosslinking agent dicumyl peroxide, 11 parts of expansion agent dichloromethane, and then add 70 parts of average particle size 32μm The energy-containing additive Al powder and 4 parts of wave-absorbing material polythiophene are fully stirred to make them evenly mixed with the oil phase;

[0041] St2: In 95 parts of deionized water, add 4 parts of disper...

Embodiment 3

[0045] The preparation method of Mg powder-type energetic hollow microspheres with different expansion ratios: the energetic hollow microspheres are mainly composed of the following components in parts by weight: 8 parts of polyacetylene as a wave-absorbing material, 12 parts of expansion agent isodecane, 65 parts of energetic additive Mg powder, 15 parts of acrylamide monomer.

[0046] The preparation method of the Mg powder type energetic hollow microspheres, the specific steps are as follows:

[0047] St1: First mix and dissolve 15 parts of acrylamide monomer, 0.8 parts of initiator mercaptan, 0.3 parts of crosslinking agent trimethylolpropane trimethacrylate, 12 parts of expansion agent isodecane, and then add 65 parts of average particle size Energetic additive Mg powder with a diameter of 28 μm and 8 parts of wave-absorbing material polyacetylene are stirred thoroughly to make them evenly mixed with the oil phase;

[0048] St2: In 92 parts of deionized water, add 7.5 pa...

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Abstract

The invention relates to a method for preparing energetic hollow microspheres, in particular to a method for preparing energetic hollow microspheres through microwave heating, and belongs to the fieldof energetic materials. An energetic hollow microsphere prepared by a microwave heating method mainly comprises the following components in parts by weight: 1-15 parts of an expanding agent, 1-10 parts of a wave-absorbing material, 60-95 parts of an energetic additive and 10-30 parts of a polymer monomer. The method includes: mixing a polymer monomer, an initiator, a cross-linking agent and a foaming agent to form an oil phase; then adding an energetic additive and a wave-absorbing material into the oil phase, uniformly mixing the components, dispersing the components in the water phase, carrying out suspension polymerization in a high-pressure reaction kettle, then heating and curing the product to obtain energetic microspheres, and finally carrying out microwave-assisted heating for foaming and expansion, and cooling the product to obtain the energetic hollow microspheres. Different from a traditional direct heating method with temperature gradient, the microwave heating method hasthe advantages that the temperature gradient is different, wherein the microwave can enable the energetic microspheres containing the wave-absorbing material to start to be heated and expanded at thesame time, so that the uniformity of the particle size of the final energetic hollow microspheres is guaranteed, and meanwhile breakage of part of the energetic microspheres caused by uneven heating is avoided.

Description

technical field [0001] The invention relates to a method for preparing energetic hollow microspheres, more specifically a method for preparing energetic hollow microspheres by microwave heating, and belongs to the field of energetic materials. Background technique [0002] Emulsion explosives have become one of the most popular industrial explosives because of their good water resistance, safety, non-toxicity and environmental protection, and are widely used in engineering blasting. Emulsion explosives do not have detonator sensitivity before adding sensitizers. Sensitizers provide the "hot spot" structure required for detonation in emulsion explosives, and are divided into physical sensitizers and chemical sensitizers, but these sensitizers do not contain Energy materials are not helpful to increase the energy of explosives. Because the emulsified matrix contains 10% water by mass, the explosive power of traditional emulsion explosives is low. In order to improve the work...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B45/00C06B33/10C06B21/00C08F283/06C08F283/00C08F220/10C08F220/22C08F281/00C08F220/56B01J13/14
CPCB01J13/14C06B21/0066C06B33/10C06B45/00C08F281/00C08F283/00C08F283/065C08F220/10C08F220/22C08F220/56
Inventor 刘蓉胡芳芳程扬帆陶臣苏健
Owner ANHUI UNIV OF SCI & TECH
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