CN113979819A - Preparation method of high-energy composite structure explosive - Google Patents
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- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
- C06B33/04—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being an inorganic nitrogen-oxygen salt
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- C—CHEMISTRY; METALLURGY
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- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
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Abstract
The invention discloses a preparation method of a high-energy composite structure explosive, which comprises the following steps: the quasi-core-shell structure is formed by a metastable state intermolecular composite material, polydopamine and an ammonium nitrate explosive, wherein the ammonium nitrate explosive is coated by the metastable state intermolecular composite material, and a bonding interface between the metastable state intermolecular composite material and the ammonium nitrate explosive is polydopamine; the metastable intermolecular composite material is composed of nano aluminum powder and one of ferric oxide, copper oxide and polytetrafluoroethylene, and the mass ratio of the nano aluminum powder to any one of the ferric oxide, the copper oxide and the polytetrafluoroethylene is 1-4: 3-5; the ammonium nitrate explosive is one or more of hexogen RDX, HMX and hexanitrohexaazaisowurtzitane CL-20. The preparation method provided by the invention has simple process, and the structure of the high-energy composite structure explosive and the proportion between the modified ammonium nitrate explosive and the metastable state intermolecular composite material can be accurately controlled by reaction conditions and doping amount; the used raw materials have low cost and can be prepared in large scale.
Description
Technical Field
The invention relates to a preparation method of a high-energy composite structure explosive, in particular to a method for improving the heat release performance and the combustion performance of a high-energy-content material, belonging to the technical field of energy-content materials.
Background
The development theme of modern weapons systems and energetic materials has not kept away with higher energy levels and superior combustion performance. The integration of homogeneous energetic materials such as cyclonite (RDX), HMX, hexanitrohexaazaisowurtzitane (CL-20) and heterogeneous energetic materials is a supplementary strategy for improving the performance of energy systems. The energy density of the homogeneous energetic material can only reach half of that of the heterogeneous energetic material, but the energy release rate is higher. Heterogeneous energetic materials have a high energy density but a slow energy release rate. The metastable state intermolecular composite Material (MIC) composed of metal fuel and metal oxide has a nano-scale diffusion length due to at least one of the metal fuel and the metal oxide, a large reaction interval is formed between the fuel and the oxidant, high combustion temperature can be generated when metal powder is combusted, and the explosion heat and the explosion temperature of explosive can be remarkably improved when the metal powder is added into the explosive. The addition of fluorine as an oxidant for metal combustion can produce more gaseous products, avoiding or minimizing two-phase losses due to the formation of condensed metal oxides. Reactive materials consisting of both aluminum powder and Polytetrafluoroethylene (PTFE) are used for their high energy density (21 kJ/cm)3) Has been put into practical use in the fields of propellants, heterogeneous explosives, pyrotechnic compositions and the like.
Polymeric materials have long been used as binders in explosive formulations to improve the mechanical properties of the explosive and to reduce the sensitivity of high explosive. By controlling the reaction conditions, simple immersion of the energetic crystal in an aqueous dopamine solution can lead to spontaneous deposition of polydopamine by a mild process. The poly-dopamine can form a uniform coating shell on the surface of the energy-containing crystal, the surface coverage rate is high, and the energy-containing crystal is kept intact after coating due to mild coating forming conditions. The composite structure explosive has the advantages of close contact among components, combination of multiple functions, improvement of material performance and the like. The unique properties of the individual materials remain unchanged and are simultaneously present in the composite system. The improvement of the performance of composite structural materials is mainly based on chemical reactions or complementary advantages among components.
Disclosure of Invention
The invention aims to provide a composite structure explosive which takes widely-applied ammonium nitrate explosive and metastable intermolecular composite material as a matrix, forms the ammonium nitrate explosive as a core after the ammonium nitrate explosive is modified, takes a polymer binder as an adhesive interface and takes a heterogeneous energetic material as a shell, and improves the heat release and combustion performance of the ammonium nitrate explosive while ensuring that the unique characteristics of each component material are kept unchanged.
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages in accordance with the present invention, there is provided a method for preparing an energetic composite structural explosive comprising: the quasi-core-shell structure is formed by a metastable intermolecular composite material, polydopamine and an ammonium nitrate explosive, wherein the ammonium nitrate explosive is coated by the metastable intermolecular composite material, and a bonding interface between the metastable intermolecular composite material and the ammonium nitrate explosive is polydopamine.
Preferably, the metastable intermolecular composite material is composed of nano aluminum powder and one of iron oxide, copper oxide and polytetrafluoroethylene, and the mass ratio of the nano aluminum powder to any one of the iron oxide, the copper oxide and the polytetrafluoroethylene is 1-4: 3-5.
Preferably, the ammonium nitrate explosive is one or more of hexogen RDX, HMX and CL-20.
Preferably, the method comprises the following steps:
step one, preparing a buffer solution with the pH of 8.5-8.6, and dissolving dopamine hydrochloride in the buffer solution to obtain a dopamine hydrochloride solution with the concentration of 0.1-2 g/L;
adding the ammonium nitrate explosive into a dopamine hydrochloride solution, stirring for 0.3-48 h, carrying out suction filtration, cleaning and drying to obtain a modified ammonium nitrate explosive;
and step three, placing the modified ammonium nitrate explosive and the metastable-state intermolecular composite material in a dispersion liquid, performing ultrasonic filtration for 5-30 min, and performing vacuum drying to obtain the high-energy composite structure explosive.
Preferably, in the third step, the dispersion liquid is one or more of solvents which do not dissolve or slightly dissolve the ammonium nitrate explosive.
Preferably, in the third step, the dispersion liquid is one or more of deionized water, methanol, alcohol and isopropanol.
Preferably, the process of the second step is replaced by: adding the ammonium nitrate explosive and dopamine hydrochloride solution into a stainless steel high-pressure reaction kettle equipped with a stirring and pressure sensor, removing air in the kettle by using carbon dioxide, introducing the carbon dioxide, stirring for 0.3-6 h at the temperature of 40-45 ℃ and under the pressure of 15-20 MPa, releasing pressure at the speed of 0.5MPa/min, carrying out suction filtration, cleaning and drying to obtain the modified ammonium nitrate explosive.
Preferably, in the first step, the buffer solution is tris basic buffer solution with the concentration of 10 mM; in the second step, the stirring speed is 100-500 rpm, the drying temperature is 40-60 ℃, and the drying time is 1-24 hours; in the third step, the frequency of ultrasound is 35-55 kHz, and the power is 200-300W; the vacuum drying time is 0.3-48 h,
preferably, the mass volume ratio of the ammonium nitrate explosive to the dopamine hydrochloride solution is 1-4 g: 10-250 mL; the mass ratio of the modified ammonium nitrate explosive to the metastable state intermolecular composite material is 7-18: 3-4; the mass volume ratio of the modified ammonium nitrate explosive to the dispersion liquid is 0.5-2 g: 10-50 mL.
Preferably, in the third step, the ultrasound is processed simultaneously by using dual-frequency ultrasound, the frequency of the dual-frequency ultrasound is 35-55 kHz and 100-120 kHz respectively, and the power of the ultrasound is 200-300W.
The invention at least comprises the following beneficial effects: the invention provides a preparation method of a high-energy composite structure explosive, which is characterized in that a poly-dopamine interface modified ammonium nitrate explosive is synthesized by an ultrasonic method to obtain a quasi-core-shell structure micron-sized crystal containing a modified ammonium nitrate explosive and a metastable-state intermolecular composite material, so that the modified ammonium nitrate explosive and the metastable-state intermolecular composite material can be in close contact, and the high-energy composite structure explosive has the advantages of keeping the unique characteristics of all materials unchanged, combining multiple functions, improving the performance of the composite material and the like.
The preparation method provided by the invention has simple process, and the structure of the high-energy composite structure explosive and the proportion between the modified ammonium nitrate explosive and the metastable state intermolecular composite material can be accurately controlled by reaction conditions and doping amount; the used raw materials have low cost and can be prepared in large scale.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
FIG. 1 is an SEM photograph of the surface of a modified RDX crystal prepared in example 1 of the present invention.
Fig. 2 is an SEM photograph of the modified RDX crystal prepared in example 1, and the nano aluminum powder and polytetrafluoroethylene composite structure explosive.
FIG. 3 is a TG-DSC curve chart of the modified RDX crystal prepared in example 1, and an explosive with a composite structure of aluminum powder and polytetrafluoroethylene.
FIG. 4 is a TG-DSC curve chart of the modified RDX crystal prepared in example 3, and an explosive with a composite structure of aluminum powder and polytetrafluoroethylene.
FIG. 5 is a combustion diagram of the modified RDX crystal prepared in example 3, and an explosive with a composite structure of aluminum powder and polytetrafluoroethylene.
FIG. 6 is a combustion diagram of the composite structure explosive of RDX crystal, aluminum powder and polytetrafluoroethylene prepared in comparative example 2.
The specific implementation mode is as follows:
the present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1:
a preparation method of an explosive with a high-energy composite structure comprises the following steps:
step one, preparing 20mL of Tris buffer solution with the pH of 8.5-8.6 and the concentration of 10mM, and dissolving dopamine hydrochloride in the buffer solution to obtain 0.4g/L dopamine hydrochloride solution;
step two, placing 1.4g of RDX into a dopamine hydrochloride solution, stirring and mixing the dispersion liquid by using a magnetic stirrer at the rotating speed of 500RPM for 3 hours, carrying out suction filtration and cleaning on the stirred solution, cleaning the solution for 3 times by using deionized water, and placing the cleaned ammonium nitrate explosive into a 50 ℃ drying oven for 12 hours to obtain modified RDX;
step three, weighing 0.7g of modified RDX, 0.1g of nano aluminum powder and 0.2g of polytetrafluoroethylene, adding the obtained mixture into 10mL of alcohol solution, performing ultrasonic treatment for 10min, performing suction filtration on most of the solvent, and drying in a vacuum drying oven for 2h to obtain the composite structure explosive; the ultrasonic frequency is 45kHz, and the power is 200W;
the modified RDX explosive prepared in example 1 was subjected to a Scanning Electron Microscope (SEM) and its microscopic crystal morphology is shown in fig. 1. The results show that the modified RDX crystals prepared in example 1 remain intact and slightly adhere to each other, and as can be seen from fig. 1, the surface of the modified RDX crystals is uniformly coated with a dense and thin outer layer, and slightly adhere to each other. As can be seen from the attached FIG. 2, some nano-scale small particles adhere to the surface of the modified RDX crystal densely, and the modified RDX is not bonded any more after ultrasonic dispersion. As can be seen in fig. 3, the total heat release of the high-energy composite structure explosive is significantly improved.
The high energy composite structure explosive prepared in this example 1 was subjected to thermal analysis, and its TG/DSC curve is shown in FIG. 3. The results show that the crystal has better thermal stability and the total heat release is 3650J/g.
Example 2:
a preparation method of an explosive with a high-energy composite structure comprises the following steps:
step one, preparing 20mL of Tris buffer solution with the pH of 8.5-8.6 and the concentration of 10mM, and dissolving dopamine hydrochloride in the buffer solution to obtain 0.4g/L dopamine hydrochloride solution;
step two, placing 1.4g of RDX into a dopamine hydrochloride solution, stirring and mixing the dispersion liquid by using a magnetic stirrer at the rotating speed of 500RPM for 3 hours, carrying out suction filtration and cleaning on the stirred solution, cleaning the solution for 3 times by using deionized water, and placing the cleaned ammonium nitrate explosive into a 50 ℃ drying oven for 12 hours to obtain modified RDX;
step three, weighing 0.7g of modified RDX, 0.12g of nano aluminum powder and 0.18g of iron oxide, adding the obtained mixture into 10mL of isopropanol solution, performing ultrasonic treatment for 10min, performing suction filtration on most of the solvent, and drying the solvent in a vacuum drying oven for 2h to obtain the composite structure explosive; the ultrasonic frequency is 45kHz, and the power is 200W;
example 3:
a preparation method of an explosive with a high-energy composite structure comprises the following steps:
step one, preparing 50mL of Tris buffer solution with the pH of 8.5-8.6 and the concentration of 10mM, and dissolving dopamine hydrochloride in the buffer solution to obtain a dopamine hydrochloride solution with the concentration of 2 g/L;
step two, placing 2g of RDX into a dopamine hydrochloride solution, stirring and mixing the dispersion solution at the rotating speed of 500RPM by using a magnetic stirrer for 3 hours, carrying out suction filtration and cleaning on the stirred solution, cleaning the solution for 3 times by using deionized water, and placing the cleaned ammonium nitrate explosive into a 50 ℃ drying oven for 12 hours to obtain modified RDX;
step three, weighing 0.7g of modified RDX, 0.12g of nano aluminum powder and 0.2g of polytetrafluoroethylene, adding the obtained mixture into 10mL of isopropanol solution, performing ultrasonic treatment for 10min, performing suction filtration on most of the obtained solvent, and drying the obtained product in a vacuum drying oven for 2h to obtain the composite structure explosive; the ultrasonic frequency is 45kHz, and the power is 200W;
the high energy composite structure explosive prepared in example 3 was subjected to thermal analysis, and its TG/DSC curve is shown in FIG. 3. The results showed that the crystal stability was good and the overall exotherm was 2922.1J/g.
Example 4:
a preparation method of an explosive with a high-energy composite structure comprises the following steps:
step one, preparing 200mL of 10mM Tris buffer solution with the pH of 8.5-8.6, and dissolving dopamine hydrochloride in the buffer solution to obtain 2g/L dopamine hydrochloride solution;
placing 3.6g of CL-20 in a dopamine hydrochloride solution, stirring and mixing the dispersion solution at the rotating speed of 500RPM by using a magnetic stirrer for 6 hours, carrying out suction filtration and cleaning on the stirred solution, cleaning 3 times by using deionized water, and placing the cleaned ammonium nitrate explosive in a 50 ℃ drying oven for 12 hours to obtain modified CL-20;
step three, weighing 1.8g of modified CL-20, 0.154g of nano aluminum powder and 0.246g of iron oxide, adding the obtained mixture into 50mL of isopropanol solution, performing ultrasonic treatment for 20min, performing suction filtration on most of the obtained solvent, and drying the obtained product in a vacuum drying oven for 2h to obtain the composite structure explosive; the ultrasonic frequency is 45kHz, and the power is 200W;
example 5:
a preparation method of an explosive with a high-energy composite structure comprises the following steps:
step one, preparing 20mL of Tris buffer solution with the pH of 8.5-8.6 and the concentration of 10mM, and dissolving dopamine hydrochloride in the buffer solution to obtain 1g/L dopamine hydrochloride solution;
step two, placing 1g of TATB in dopamine hydrochloride solution, stirring and mixing the dispersion liquid at the rotating speed of 500RPM by using a magnetic stirrer for 6 hours, carrying out suction filtration and cleaning on the stirred solution, cleaning the solution for 3 times by using deionized water, and placing the cleaned ammonium nitrate explosive in a 50 ℃ drying oven for 12 hours to obtain modified TATB;
step three, weighing 0.7g of modified TATB, 0.06g of nano aluminum powder and 0.24g of copper oxide, adding the obtained mixture into 20mL of isopropanol solution, performing ultrasonic treatment for 10min, then performing suction filtration on most of the obtained solvent, and drying the obtained product in a vacuum drying oven for 2h to obtain the composite structure explosive; the ultrasonic frequency is 45kHz, and the power is 200W;
example 6:
a preparation method of an explosive with a high-energy composite structure comprises the following steps:
step one, preparing 50mL of Tris buffer solution with the pH of 8.5-8.6 and the concentration of 10mM, and dissolving dopamine hydrochloride in the buffer solution to obtain a dopamine hydrochloride solution with the concentration of 2 g/L;
adding 2g of RDX and dopamine hydrochloride solution into a stainless steel high-pressure reaction kettle provided with a stirring and pressure sensor, removing air in the kettle by using carbon dioxide, introducing the carbon dioxide, stirring for 1.5h at 40 ℃ and 18MPa, releasing pressure at the speed of 0.5MPa/min, carrying out suction filtration and cleaning on the solution after pressure release, cleaning for 3 times by using deionized water, and placing the cleaned ammonium nitrate explosive in a 50 ℃ drying oven for 12h to obtain modified RDX;
step three, weighing 0.7g of modified RDX, 0.12g of nano aluminum powder and 0.2g of polytetrafluoroethylene, adding the obtained mixture into 10mL of isopropanol solution, performing ultrasonic treatment for 10min, performing suction filtration on most of the obtained solvent, and drying the obtained product in a vacuum drying oven for 2h to obtain the composite structure explosive; the ultrasonic frequency is 45kHz, and the power is 200W;
the high energy composite structure explosive prepared in example 6 was subjected to thermal analysis and the total exotherm was 3125.1J/g.
Example 7:
a preparation method of an explosive with a high-energy composite structure comprises the following steps:
step one, preparing 50mL of Tris buffer solution with the pH of 8.5-8.6 and the concentration of 10mM, and dissolving dopamine hydrochloride in the buffer solution to obtain a dopamine hydrochloride solution with the concentration of 2 g/L;
adding 2g of RDX and dopamine hydrochloride solution into a stainless steel high-pressure reaction kettle provided with a stirring and pressure sensor, removing air in the kettle by using carbon dioxide, introducing the carbon dioxide, stirring for 1.5h at 40 ℃ and 18MPa, releasing pressure at the speed of 0.5MPa/min, carrying out suction filtration and cleaning on the solution after pressure release, cleaning for 3 times by using deionized water, and placing the cleaned ammonium nitrate explosive in a 50 ℃ drying oven for 12h to obtain modified RDX;
weighing 0.7g of modified RDX, 0.12g of nano aluminum powder and 0.2g of polytetrafluoroethylene, adding into 10mL of isopropanol solution, carrying out simultaneous treatment for 10min by adopting double-frequency ultrasound, then carrying out suction filtration on most of the solvent, and drying for 2h in a vacuum drying oven to obtain the composite structure explosive; the frequency of the double-frequency ultrasonic wave is 45kHz and 115kHz respectively, and the power of the ultrasonic wave is 200W;
the high energy composite structure explosive prepared in example 6 was subjected to thermal analysis and the total exotherm was 3420.8J/g.
Comparative example 1:
a preparation method of an explosive with a high-energy composite structure comprises the following steps:
step one, preparing 50mL of Tris buffer solution with the pH of 8.5-8.6 and the concentration of 10mM, and dissolving dopamine hydrochloride in the buffer solution to obtain a dopamine hydrochloride solution with the concentration of 2 g/L;
step two, placing 2g of RDX into a dopamine hydrochloride solution, stirring and mixing the dispersion solution at the rotating speed of 500RPM by using a magnetic stirrer for 3 hours, carrying out suction filtration and cleaning on the stirred solution, cleaning the solution for 3 times by using deionized water, and placing the cleaned ammonium nitrate explosive into a 50 ℃ drying oven for 12 hours to obtain modified RDX;
step three, weighing 0.7g of modified RDX and 0.32g of nano aluminum powder, adding the obtained mixture into 10mL of isopropanol solution, performing ultrasonic treatment for 10min, performing suction filtration to obtain most of solvent, and drying in a vacuum drying oven for 2h to obtain the composite structure explosive; the ultrasonic frequency is 45kHz, and the power is 200W;
the high energy composite structure explosive prepared in comparative example 1 was thermally analyzed and its total heat release was 2241.5J/g.
Comparative example 2:
weighing 0.7g of RDX, 0.12g of nano aluminum powder and 0.2g of polytetrafluoroethylene, adding into 10mL of isopropanol solution, performing ultrasonic treatment for 10min, performing suction filtration to remove most of the solvent, and drying in a vacuum drying oven for 2h to obtain the composite structure explosive; the ultrasonic frequency is 45kHz, and the power is 200W;
as can be seen from fig. 5 and 6, the high energy composite structure explosive prepared in example 3 has excellent burning rate and burning effect, while the explosive in comparative example 2 is not modified, so that the burning rate and burning effect are poor.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A preparation method of the high-energy composite structure explosive is characterized by comprising the following steps: the quasi-core-shell structure is formed by a metastable intermolecular composite material, polydopamine and an ammonium nitrate explosive, wherein the ammonium nitrate explosive is coated by the metastable intermolecular composite material, and a bonding interface between the metastable intermolecular composite material and the ammonium nitrate explosive is polydopamine.
2. The preparation method of the high-energy composite structure explosive according to claim 1, wherein the metastable intermolecular composite material is composed of nano aluminum powder and one of iron oxide, copper oxide and polytetrafluoroethylene, and the mass ratio of the nano aluminum powder to any one of the iron oxide, the copper oxide and the polytetrafluoroethylene is 1-4: 3-5.
3. The method for preparing the high-energy composite structure explosive according to claim 1, wherein the ammonium nitrate explosive is one or more of hexogen RDX, HMX and CL-20.
4. A method for preparing an energetic composite structural explosive according to any one of claims 1 to 3, characterized in that it comprises the following steps:
step one, preparing a buffer solution with the pH of 8.5-8.6, and dissolving dopamine hydrochloride in the buffer solution to obtain a dopamine hydrochloride solution with the concentration of 0.1-2 g/L;
adding the ammonium nitrate explosive into a dopamine hydrochloride solution, stirring for 0.3-48 h, carrying out suction filtration, cleaning and drying to obtain a modified ammonium nitrate explosive;
and step three, placing the modified ammonium nitrate explosive and the metastable-state intermolecular composite material in a dispersion liquid, performing ultrasonic filtration for 5-30 min, and performing vacuum drying to obtain the high-energy composite structure explosive.
5. The method for preparing the high-energy composite structure explosive according to the claim 4, wherein in the third step, the dispersion liquid is one or more of solvents which do not dissolve or slightly dissolve the ammonium nitrate explosive.
6. The method for preparing the high-energy composite structure explosive according to claim 5, wherein in the third step, the dispersion liquid is one or more of deionized water, methanol, alcohol and isopropanol.
7. The method for preparing the high-energy composite structure explosive according to the claim 5, wherein the process of the second step is replaced by the following steps: adding the ammonium nitrate explosive and dopamine hydrochloride solution into a stainless steel high-pressure reaction kettle equipped with a stirring and pressure sensor, removing air in the kettle by using carbon dioxide, introducing the carbon dioxide, stirring for 0.3-6 h at the temperature of 40-45 ℃ and under the pressure of 15-20 MPa, releasing pressure at the speed of 0.5MPa/min, carrying out suction filtration, cleaning and drying to obtain the modified ammonium nitrate explosive.
8. The method for preparing the high-energy composite structure explosive according to the claim 4, wherein in the step one, the buffer solution is a tris basic buffer solution with the concentration of 10 mM; in the second step, the stirring speed is 100-500 rpm, the drying temperature is 40-60 ℃, and the drying time is 1-24 hours; in the third step, the frequency of ultrasound is 35-55 kHz, and the power is 200-300W; the vacuum drying time is 0.3-48 h.
9. The preparation method of the high-energy composite structure explosive according to claim 4, wherein the mass-to-volume ratio of the ammonium nitrate explosive to the dopamine hydrochloride solution is 1-4 g: 10-250 mL; the mass ratio of the modified ammonium nitrate explosive to the metastable state intermolecular composite material is 7-18: 3-4; the mass volume ratio of the modified ammonium nitrate explosive to the dispersion liquid is 0.5-2 g: 10-50 mL.
10. The preparation method of the high-energy composite structure explosive according to claim 4, characterized in that in the third step, the ultrasound is simultaneously processed by double-frequency ultrasound, the frequency of the double-frequency ultrasound is 35-55 kHz and 100-120 kHz respectively, and the power of the ultrasound is 200-300W.
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