Antistatic composite energetic material capable of completely avoiding charge generation and preparation method of antistatic composite energetic material

Abstract

The invention discloses an antistatic composite energetic material capable of completely avoiding charge generation and a preparation method thereof, and the preparation method comprises the following steps: adding an energetic material into an ethanol-water mixed solution, carrying out ultrasonic treatment at room temperature, and fully stirring to obtain an energetic material dispersion liquid; adjusting the pH value of the energetic material dispersion liquid to 3-5 by using glacial acetic acid, and uniformly stirring to obtain a mixed solution; dropwise adding chemical components with a strong electron accepting function and a strong electron donating function into the mixed solution, refluxing, stirring for a period of time, cooling to room temperature, washing and filtering; and drying the washed and filtered sample to obtain the strong electron accepting and strong electron donating molecule modified antistatic composite energetic material. According to the invention, chemical components with strong electron accepting and strong electron donating are modified on the surface of the energetic material through a molecular engineering method, so that the preparation of the antistatic coating and the antistatic composite energetic material capable of completely avoiding charge generation is realized, and the static accumulation of the energetic materials such as RDX and the like in the friction process is effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of energetic materials. More specifically, the present invention relates to an antistatic composite energetic material that completely avoids charge generation and a preparation method thereof. Background Art

[0002] The safe production of energetic materials is an inevitable requirement to ensure the sufficient supply of weapons and ammunition and meet the ammunition consumption in live-fire exercises of our army. However, the resistivity of explosives is generally in the range of 10 12 ~10 16 Ω·cm, which belongs to highly insulating substances. In the technological processes such as screening, mixing, and pouring, due to the movement states such as flowing, jittering, and vibrating, it is inevitable that a large amount of static charges that are difficult to dissipate will accumulate due to the friction between the energetic material particles and the wall surface. The charged energetic material particles will generate an electric field strength around them. When the electric field strength reaches the breakdown field strength of the environmental medium, electrostatic discharge may be triggered, leading to combustion and explosion accidents. By modifying the energetic materials with conductive materials to reduce the static charge accumulation generated by the powder materials is a common method to improve the electrostatic safety of energetic materials. Common antistatic materials include surfactants, carbon materials, conductive polymers, metal materials, etc.

[0003] The lipophilic group in the surfactant molecule adsorbs on the surface of the energetic material, while the hydrophilic group arranges towards the air side to absorb environmental moisture or combine with the moisture in the environment through hydrogen bonds to form a single-molecule conductive layer, so that the generated static charges can be quickly leaked to achieve the antistatic effect. Carbon materials include carbon black, carbon nanotubes, graphite, carbon fibers, etc. They have high conductivity. Coating the carbon materials on the surface of the energetic material can reduce the surface resistance of the energetic material, so that the static charges can be quickly dissipated and the static charge accumulation can be avoided. If the carbon materials are directly added to the system, the rapid dissipation of charges can be achieved by constructing a conductive network. Conductive polymers include polyaniline (PANI), polypyrrole (PPy), polythiophene (PTh), etc., which have good conductivity. The antistatic mechanism of conductive polymers mainly depends on their unique molecular structure and conductive characteristics, and the electrostatic dissipation is achieved through intrinsic conductivity and charge dynamic balance. Metal materials are a class of elemental materials with good electrical conductivity. The internal structure of metals is a crystal, which is composed of metal cations and free electrons combined by metal bonds. The electrostatic neutralization is achieved through the migration of free electrons, and the charge accumulation can be avoided.

[0004] Antistatic treatment with traditional surfactants, carbon materials and conductive polymers is mainly achieved by increasing the diffusion rate of static charge in materials to avoid excessive charge accumulation. This method is effective to a certain extent, but it cannot avoid the generation of static charge from the root. In addition, traditional surfactants rely on environmental humidity, carbon materials require higher addition amounts and complex dispersion processes, and the processing technology of conductive polymers is relatively complex and lacks compatibility with traditional production processes of energetic materials. Metal materials achieve antistatic treatment through neutralization, but during use, there are fewer surface active sites, making it difficult to achieve tight coating on the surface of energetic materials, and thus cannot be effectively applied. Summary of the invention

[0005] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages which will be described hereinafter.

[0006] In order to achieve these purposes and other advantages according to the present invention, an antistatic composite energetic material that completely avoids charge generation is provided, the surface of the antistatic composite energetic material has an antistatic coating that can completely avoid charge generation, and the antistatic coating is obtained by modifying the surface of the energetic material with chemical components having strong electron accepting function and strong electron donating function.

[0007] A method for preparing an antistatic composite energetic material that completely avoids charge generation comprises the following steps:

[0008] Step 1: adding the energetic material to an ethanol-water mixed solution, ultrasonically treating at room temperature, and fully stirring to obtain an energetic material dispersion;

[0009] Step 2: Use glacial acetic acid to adjust the pH of the energetic material dispersion to 3-5, stir evenly, and obtain a mixed solution;

[0010] Step 3: dropwise add the chemical components with strong electron accepting function and strong electron donating function into the mixed solution, reflux, stir for a period of time, cool to room temperature, wash and filter;

[0011] Step 4: Dry the washed and filtered sample to obtain an antistatic composite energetic material modified with strong electron accepting and strong electron donating molecules.

[0012] Preferably, in the first step, the energetic material includes any one or a mixture or eutectic of two of hexanitrohexaazaisowurtzitane, octogen, cyclotrimethylenetrinitramine, trinitro-triaminobenzene, hexanitrotoluene, 3,3'-diamino-4,4'-azofurazan, 3,3'-diamino-4,4'-azoxyfurazan, 1,1-diamino-2,2-dinitroethylene, 2,4,6-trinitrotoluene, picric acid, 1,3-dinitrobenzene, 1,2-dinitrobenzene, p-nitrochlorobenzene, p-nitroaniline, p-nitrophenol, 3,5-dinitroaniline, 3,5-dinitrotoluene, 2,4-dinitrotoluene, 2,4-dinitrophenol, 3,5-dinitrobenzoic acid, 3,4-dinitrofurazanylfurazan, nitrocellulose, pyrazine-1,4-dioxide, 1-methyl-3-nitropyrazole.

[0013] Preferably, in the first step, the volume ratio of ethanol to water is 99:1 to 70:30.

[0014] Preferably, in the first step, the ultrasonic treatment time is 5 to 30 min.

[0015] Preferably, in the first step, the stirring method is any one or a mixture of magnetic stirring and mechanical stirring.

[0016] Preferably, in the third step, the mass of the strong electron acceptor and strong electron donor chemical components accounts for 1% to 3% of the mass of the energetic material.

[0017] Preferably, in the third step, the mass ratio of the strong electron acceptor chemical component to the strong electron donor chemical component is 0.85:0.15 to 0.65:0.35.

[0018] Preferably, in the third step, the reflux temperature is 50 to 90 °C.

[0019] Preferably, in the third step, the strong electron acceptor chemical component includes potassium perfluorooctanesulfonate (PFOS), 3-(trimethoxysilyl)propyl acrylate (TMSPMA), vinyltrimethoxysilane (VTMS), 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl methacrylate (HDFDM);

[0020] The strong electron donor chemical component includes one of polyhexamethylene biguanide (PHMB), aminopropyltriethoxysilane (APTES), α-methyl-ω-trimethylsilyltris(dimethylsiloxane) (TDMS).

[0021] An antistatic composite energetic material that completely avoids charge generation, which is prepared by the preparation method of the above-mentioned antistatic composite energetic material that completely avoids charge generation.

[0022] In order to further enhance the antistatic effect of the antistatic composite energetic material, in step one, after adding the energetic material to the ethanol-water mixed solution, graphite powder is added thereto and ultrasonic treated for 10 - 30 min, and fully stirred for 30 min. Sodium hexadecyl benzene sulfonate is added dropwise, and magnetically dispersed at 350 - 450 rpm for 10 - 30 min. After heating to 40 - 60 °C, it is kept warm and static for 4 - 6 h, and after cooling to room temperature, an energetic material dispersion is obtained; among them, the mass ratio of the energetic material, graphite powder, and sodium hexadecyl benzene sulfonate is 20:4:1.

[0023] The present invention has at least the following beneficial effects:

[0024] (1) Aiming at the limitation of "passively dissipating static charges" existing in traditional antistatic methods (such as insufficient compatibility between high-conductive material coating and energetic material processes, poor environmental adaptability of surface hydrophilic modification, etc.). The present invention modifies strong electron-accepting and strong electron-donating chemical components on the surface of the energetic material through a molecular engineering method, so as to realize the preparation of an antistatic coating and an antistatic composite energetic material that completely avoid charge generation. The present invention proposes a new surface engineering method. By modifying strong electron-accepting chemical components and strong electron-donating chemical components on the surface of the energetic material, in contact electrification, these two kinds of molecules respectively have strong abilities to generate positive charges and negative charges. By adjusting the ratio of the two components, the surface potential of the coating surface can be adjusted. When the surface potential of the coating surface is the same as that of the surface it rubs against, contact electrification can be completely avoided, that is, an antistatic coating that completely avoids charge generation is formed, effectively reducing the static charge accumulation of the energetic material during friction. Taking the energetic material RDX as an example, perfluorooctanesulfonate (PFOS) and polyhexamethylene biguanide (PHMB) are modified on the surface of the RDX energetic material by dip coating, and the RDX@PFOS x- PHMB y (where x and y are the mass percentages of PFOS and PHMB respectively, and x + y = 1) composite energetic material is successfully prepared. PFOS and PHMB form an antistatic coating on the surface of RDX, effectively reducing the static charge accumulation of energetic materials such as RDX during friction.

[0025] (2) The preparation method provided by the present invention has a simple process, is not limited by the shape of the material, can effectively reduce the static charge accumulation of the energetic material during friction, and is easy to realize industrial production.

[0026] (3) Taking RDX as an example, after adding the energetic material into the ethanol-water mixed solution in the present invention, graphite powder is added thereto, and sodium dodecyl benzene sulfonate is added drop by drop. The dispersing effect of sodium dodecyl benzene sulfonate makes the graphite more uniformly coat the RDX particles. The graphite forms a physical conduction path, which is beneficial to electron conduction. Moreover, sodium dodecyl benzene sulfonate provides an ionic conduction channel through the dissociation of sulfonic acid groups. The combination of the two significantly reduces the surface resistivity of RDX, avoiding the accumulation of static electricity. Subsequently, through the modification of strong electron-accepting chemical components and strong electron-donating chemical components, the static electricity accumulation of energetic materials such as RDX during friction is further reduced.

[0027] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and will also be understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0028] Figure 1 SEM image of the RDX raw material used in Example 3;

[0029] Figure 2 SEM image of the antistatic composite energetic material RDX@PFOS 0.75 -PHMB 0.25 prepared in Example 3. Detailed Embodiments

[0030] The following further elaborates on the present invention with reference to the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0031] It should be understood that terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0032] Testing Method:

[0033] An electrostatic accumulation characteristic tester is used to test the electrostatic accumulation amount of the modified material and the antistatic modified composite material sample. The sample is dried before the test, baked at 50-60 °C for 12 h, taken out and placed in a desiccator, and cooled at room temperature for 1-2 h before use. The electrostatic accumulation amount is calculated based on 7 valid test results. The test conditions are as follows: the test drug amount is (5.000 ± 0.001 g), the chute angle is 45°, the chute material is stainless steel, the test temperature is room temperature (25 °C), and the relative humidity is less than 60%. Pour the drug into the chute, and the drug slides and rubs along the chute under the action of gravity and falls into the Faraday cylinder. The electrostatic accumulation amount is read through a digital display charge meter connected to the Faraday cylinder. The specific steps are as follows:

[0034] ①Adjust the sliding groove to the test angle, and make the bottom of the sliding groove face directly to the upper end of the Faraday cylinder, with a distance of 50 mm ± 2 mm; the medicine box is 100 mm ± 2 mm away from the sliding groove.

[0035] ②Connect the Faraday cylinder and the digital charge meter, turn on the power supply, start the equipment, set the appropriate range of the digital charge meter and zero it.

[0036] ③Pour the weighed medicine to be tested from the upper end of the medicine cup, so that the medicine falls into the Faraday cylinder through the sliding groove.

[0037] ④Observe the data obtained from the mass display screen and the digital charge meter, record the data of the digital charge meter before pouring the medicine, and after it stabilizes, record the mass and the data of the digital charge meter.

[0038] ⑤Wipe the adhering samples in the medicine cup, sliding groove, funnel and Faraday cylinder with absorbent cotton, then wipe them clean with ethyl acetate, and dry the medicine box, sliding groove, funnel and Faraday cylinder.

[0039] ⑥Repeat steps ① to ⑤, and complete at least 7 valid tests for each group.

[0040] ⑦After the test is completed, turn off the instrument and tidy up the experimental utensils, tweezers and other tools.

[0041] ⑧Wipe the instrument with ethyl acetate, clean the floor and keep the laboratory clean and tidy.

[0042] Example 1:

[0043] A preparation method of an antistatic composite energetic material that completely avoids charge generation, including the following steps:

[0044] Step 1: Add 3 g of hexanitrohexaazaisowurtzitane (CL-20) to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat it for 10 min at room temperature, and stir it thoroughly for 30 min to obtain a CL-20 dispersion;

[0045] Step 2: Use glacial acetic acid to adjust the pH of the CL-20 dispersion to about 4, and stir evenly;

[0046] Step 3: Dropwise add the chemical components of polyhexamethylene biguanide (PHMB) with strong electron-donating function and potassium perfluorooctanesulfonate (PFOS) with strong electron-accepting function into the mixed solution (the total mass fraction of PHMB and PFOS is 2%, and the mass ratio of PHMB to PFOS is: 0.75:0.25), reflux at 70 °C, and mechanically stir at 250 r / min for 8 h, cool to room temperature, and wash with absolute ethanol 3 times;

[0047] Step 4: Place the obtained sample in a water bath oven and dry it at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 For the antistatic composite energetic material, CL-20@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS is obtained 0.75 -PHMB 0.25 Antistatic composite energetic material

[0048] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0049] Refer to the above method to test the electrostatic accumulation characteristics of CL-20 raw material and antistatic CL-20@PFOS 0.75 -PHMB 0.25 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is 0.48 nC·g -1 , and the electrostatic accumulation amount of CL-20 raw material under specific conditions is -10.11 nC·g -1 , and the electrostatic accumulation amount of the composite energetic material is significantly reduced

[0050] Example 2:

[0051] A preparation method of an antistatic composite energetic material that completely avoids charge generation, comprising the following steps:

[0052] Step 1: Add 3 g of 3,4-dinitrofurazanyl furazan (DNTF) to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat it at room temperature for 10 min, and stir it thoroughly for 30 min to obtain a DNTF dispersion

[0053] Step 2: Use glacial acetic acid to adjust the pH of the DNTF dispersion to about 4 and stir evenly

[0054] Step 3: Dropwise add the chemical components of polyhexamethylene biguanide (PHMB) with strong electron-donating function and potassium perfluorooctane sulfonate (PFOS) with strong electron-accepting function into the mixed solution (the total mass fraction of PHMB and PFOS is 2%, and the mass ratio of PHMB to PFOS is: 0.75:0.25), reflux at 70 °C, and mechanically stir at 250 r / min for 8 h, cool to room temperature, and wash with absolute ethanol 3 times

[0055] Step 4: Place the obtained sample in a water bath oven and dry it at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material

[0056] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0057] Refer to the above method to test the electrostatic accumulation characteristics of DNTF raw material and antistatic DNTF@PFOS 0.75 -PHMB 0.25 composite energetic material. The test conditions are as follows: test charge amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is -0.31 nC·g -1 , and the electrostatic accumulation amount of DNTF raw material under specific conditions is -20.78 nC·g -1 , and the electrostatic accumulation amount of the composite energetic material is significantly reduced

[0058] Example 3:

[0059] A preparation method of an antistatic composite energetic material that completely avoids charge generation, comprising the following steps:

[0060] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat it at room temperature for 10 min, and stir it thoroughly for 30 min to obtain an RDX dispersion;

[0061] Step 2: Use glacial acetic acid to adjust the pH of the RDX dispersion to about 4 and stir evenly;

[0062] Step 3: Dropwise add the chemical components of potassium perfluorooctanesulfonate (PFOS) with strong electron-accepting function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 2%, and the mass ratio of PFOS to PHMB is: 0.75:0.25), reflux at 70 °C, and mechanically stir at 250 r / min for 8 h, cool to room temperature, and wash with absolute ethanol 3 times;

[0063] Step 4: Place the obtained sample in a water bath oven and dry it at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25Antistatic composite energetic material, obtaining RDX@PFOS modified by strong electron acceptor PFOS and strong electron donor molecule PHMB 0.75 -PHMB 0.25 Antistatic composite energetic material.

[0064] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0065] Refer to the above method for the RDX raw material and antistatic RDX@PFOS 0.75 -PHMB 0.25 The electrostatic accumulation characteristics of the composite energetic material were tested. The test conditions are as follows: the test drug amount is (5.000 ± 0.001 g), the chute angle is 45°, the chute material is stainless steel, the test temperature is room temperature (25 °C), and the relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example is 0.07 nC·g -1 under specific conditions, and the electrostatic accumulation amount of the RDX raw material is -11.29 nC·g -1 under specific conditions, and the electrostatic accumulation amount of the composite energetic material is significantly reduced. Figure 1 is the RDX raw material, Figure 2 is RDX@PFOS 0.75 -PHMB 0.25 SEM of the antistatic composite energetic material. The SEM image of the RDX raw material used in this example is as Figure 1 shown, and the SEM image of RDX@PFOS 0.75 -PHMB 0.25 modified by strong electron acceptor PFOS and strong electron donor molecule PHMB is as Figure 2 shown.

[0066] Example 4:

[0067] A preparation method of an antistatic composite energetic material that completely avoids charge generation, comprising the following steps:

[0068] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of an ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat for 10 min at room temperature, and fully stir for 30 min to obtain an RDX dispersion;

[0069] Step 2: Use glacial acetic acid to adjust the pH of the RDX dispersion to about 4, and stir evenly;

[0070] Step 3: Dropwise add chemical components of perfluorooctanesulfonate potassium (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 2%, and the mass ratio of PFOS to PHMB is 0.85:0.15). Reflux at 70 °C and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash 3 times with absolute ethanol;

[0071] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, and obtain RDX@PFOS modified with strong electron-accepting PFOS and strong electron-donating molecule PHMB 0.85 -PHMB 0.15 Antistatic composite energetic material.

[0072] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0073] Refer to the above method to test the electrostatic accumulation characteristics of RDX raw material and antistatic RDX@PFOS 0.85 -PHMB 0.15 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is -4.03 nC·g -1 The electrostatic accumulation amount of the RDX raw material under specific conditions is -11.29 nC·g -1 The electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0074] Example 5:

[0075] A preparation method of an antistatic composite energetic material that completely avoids charge generation, comprising the following steps:

[0076] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and fully stir for 30 min to obtain an RDX dispersion;

[0077] Step 2: Use glacial acetic acid to adjust the pH of the RDX dispersion to about 4 and stir evenly;

[0078] Step 3: Dropwise add chemical components of potassium perfluorooctanesulfonate (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 2%, and the mass ratio of PFOS to PHMB is 0.85:0.15). Reflux at 70 °C and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash 3 times with absolute ethanol;

[0079] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, and obtain RDX@PFOS modified with strong electron-accepting PFOS and strong electron-donating molecule PHMB 0.8 -PHMB 0.2 Antistatic composite energetic material.

[0080] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0081] Refer to the above method to test the electrostatic accumulation characteristics of RDX raw material and antistatic RDX@PFOS 0.8 -PHMB 0.2 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is -1.75 nC·g -1 , and the electrostatic accumulation amount of the RDX raw material under specific conditions is -11.29 nC·g -1 The electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0082] Example 6:

[0083] A preparation method of an antistatic composite energetic material that completely avoids charge generation, including the following steps:

[0084] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and fully stir for 30 min to obtain an RDX dispersion;

[0085] Step 2: Use glacial acetic acid to adjust the pH of the RDX dispersion to about 4 and stir evenly;

[0086] Step 3: Dropwise add chemical components of potassium perfluorooctanesulfonate (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 2%, and the mass ratio of PFOS to PHMB is 0.7:0.3), reflux at 70 °C, and mechanically stir at 250 r / min for 8 h, cool to room temperature, and wash with absolute ethanol three times;

[0087] Step 4: Place the obtained sample in a water bath oven and dry it at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, and obtain RDX@PFOS modified with strong electron-accepting PFOS and strong electron-donating molecule PHMB 0.7 -PHMB 0.3 Antistatic composite energetic material.

[0088] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0089] Refer to the above method to test the electrostatic accumulation characteristics of RDX raw material and antistatic RDX@PFOS 0.7 -PHMB 0.3 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is 1.36 nC·g -1 , and the electrostatic accumulation amount of the RDX raw material under specific conditions is -11.29 nC·g -1 The electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0090] Example 7:

[0091] A preparation method of an antistatic composite energetic material that completely avoids charge generation, comprising the following steps:

[0092] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and fully stir for 30 min to obtain an RDX dispersion;

[0093] Step 2: Use glacial acetic acid to adjust the pH of the above suspension to about 4 and stir evenly;

[0094] Step 3: Dropwise add chemical components of perfluorooctanesulfonate potassium (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 2%, and the mass ratio of PFOS to PHMB is 0.65:0.35), reflux at 70 °C, and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash 3 times with absolute ethanol;

[0095] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-withdrawing molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, and obtain RDX@PFOS modified with strong electron-withdrawing PFOS and strong electron-donating molecule PHMB 0.65 -PHMB 0.35 Antistatic composite energetic material.

[0096] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0097] Refer to the above method to test the electrostatic accumulation characteristics of RDX raw material and antistatic RDX@PFOS 0.65 -PHMB 0.35 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is 3.87 nC·g -1 , and the electrostatic accumulation amount of the RDX raw material under specific conditions is -11.29 nC·g -1 The electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0098] Example 8:

[0099] A preparation method of an antistatic composite energetic material that completely avoids charge generation, including the following steps:

[0100] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and fully stir for 30 min to obtain an RDX dispersion;

[0101] Step 2: Use glacial acetic acid to adjust the pH of the RDX dispersion to about 4 and stir evenly;

[0102] Step 3: Dropwise add the chemical components of perfluorooctanesulfonate potassium (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 1%, and the mass ratio of PFOS to PHMB is 0.75:0.25). Reflux at 70 °C and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash 3 times with absolute ethanol;

[0103] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, and obtain RDX@PFOS modified with strong electron-accepting PFOS and strong electron-donating molecule PHMB 0.75 -PHMB 0.25 Antistatic composite energetic material.

[0104] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0105] Refer to the above method to test the electrostatic accumulation characteristics of RDX raw material and antistatic RDX@PFOS 0.75 -PHMB 0.25 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is -0.43 nC·g -1 The electrostatic accumulation amount of the RDX raw material under specific conditions is -11.29 nC·g -1 The electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0106] Example 9:

[0107] A preparation method of an antistatic composite energetic material that completely avoids charge generation, comprising the following steps:

[0108] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and stir well for 30 min to obtain an RDX dispersion;

[0109] Step 2: Use glacial acetic acid to adjust the pH of the RDX dispersion to about 4 and stir evenly;

[0110] Step 3: Dropwise add the chemical components of perfluorooctanesulfonate potassium (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 3%, and the mass ratio of PFOS to PHMB is 0.75:0.25). Reflux at 70 °C and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash 3 times with absolute ethanol;

[0111] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, to obtain RDX@PFOS modified with strong electron-accepting PFOS and strong electron-donating molecule PHMB 0.75 -PHMB 0.25 Antistatic composite energetic material.

[0112] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0113] Refer to the above method for the electrostatic accumulation characteristics test of RDX raw material and antistatic RDX@PFOS 0.75 -PHMB 0.25 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is 0.11 nC·g -1 , and the electrostatic accumulation amount of the RDX raw material under specific conditions is -11.29 nC·g -1 The electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0114] Example 10:

[0115] A preparation method of an antistatic composite energetic material that completely avoids charge generation, including the following steps:

[0116] Step 1: Add 3 g of CL-20 / MNP eutectic to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and fully stir for 30 min to obtain a CL-20 / MNP dispersion;

[0117] Step 2: Use glacial acetic acid to adjust the pH of the CL-20 / MNP dispersion to about 4 and stir evenly;

[0118] Step 3: Dropwise add the chemical components of potassium perfluorooctanesulfonate (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 2%, and the mass ratio of PFOS to PHMB is 0.75:0.25). Reflux at 70 °C and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash 3 times with absolute ethanol;

[0119] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, to obtain CL-20 / MNP@PFOS modified with strong electron-accepting PFOS and strong electron-donating molecule PHMB 0.75 -PHMB 0.25 Antistatic composite energetic material.

[0120] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0121] Refer to the above method to test the electrostatic accumulation characteristics of CL-20 / MNP eutectic raw materials and antistatic CL-20 / MNP@PFOS 0.75 -PHMB 0.25 Composite energetic materials. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is -0.41 nC·g -1 The electrostatic accumulation amount of CL-20 / MNP eutectic raw materials under specific conditions is -11.07 nC·g -1 The electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0122] Example 11:

[0123] A preparation method of an antistatic composite energetic material that completely avoids charge generation, including the following steps:

[0124] Step 1: Add 3 g of ammonium nitramide / polydioxanone (ADN / PDO) eutectic into 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and fully stir for 30 min to obtain an ADN / PDO dispersion;

[0125] Step 2: Use glacial acetic acid to adjust the pH of the ADN / PDO dispersion to about 4 and stir evenly;

[0126] Step 3: Dropwise add the chemical components of potassium perfluorooctanesulfonate (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 2%, and the mass ratio of PFOS to PHMB is 0.75:0.25). Reflux at 70 °C and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash 3 times with absolute ethanol;

[0127] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, to obtain ADN / PDO@PFOS modified with strong electron-accepting PFOS and strong electron-donating molecule PHMB 0.75 -PHMB 0.25 Antistatic composite energetic material.

[0128] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0129] Refer to the above method to test the electrostatic accumulation characteristics of ADN / PDO eutectic raw materials and antistatic ADN / PDO@PFOS 0.75 -PHMB 0.25 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is 0.27 nC·g -1 , and the electrostatic accumulation amount of ADN / PDO eutectic raw materials under specific conditions is -8.85 nC·g -1 , and the electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0130] Example 12:

[0131] A preparation method of an antistatic composite energetic material that completely avoids charge generation, including the following steps:

[0132] Step 1: Add 3 g of nitramide ammonium / polydioxane (DNB / PDO) eutectic to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and fully stir for 30 min to obtain a DNB / PDO dispersion;

[0133] Step 2: Use glacial acetic acid to adjust the pH of the DNB / PDO dispersion to about 4 and stir evenly;

[0134] Step 3: Dropwise add chemical components of potassium perfluorooctanesulfonate (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 2%, and the mass ratio of PFOS to PHMB is 0.75:0.25), reflux at 70 °C, and mechanically stir at 250 r / min for 8 h, cool to room temperature, and wash 3 times with absolute ethanol;

[0135] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-accepting molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, to obtain DNB / PDO@PFOS modified with strong electron-accepting PFOS and strong electron-donating molecule PHMB 0.75 -PHMB 0.25 Antistatic composite energetic material.

[0136] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0137] Refer to the above method for the electrostatic accumulation characteristics test of DNB / PDO eutectic raw materials and antistatic DNB / PDO@PFOS 0.75 -PHMB 0.25 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is 0.27 nC·g -1 , and the electrostatic accumulation amount of DNB / PDO eutectic raw materials under specific conditions is -8.85 nC·g -1 , and the electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0138] Example 13:

[0139] A preparation method of an antistatic composite energetic material that completely avoids charge generation, comprising the following steps:

[0140] Step 1: Add 3 g of hexanitrohexaazaisowurtzitane / rdx (CL-20 / RDX) mixture to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and fully stir for 30 min to obtain a CL-20 / RDX dispersion;

[0141] Step 2: Use glacial acetic acid to adjust the pH of the CL-20 / RDX dispersion to about 4 and stir evenly;

[0142] Step 3: Dropwise add the chemical components of perfluorooctanesulfonate potassium (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 2%, and the mass ratio of PFOS to PHMB is 0.75:0.25). Reflux at 70 °C and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash with absolute ethanol three times.

[0143] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain DNTF@PFOS modified with strong electron-donating PHMB and strong electron-withdrawing molecule PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material, to obtain CL-20 / RDX@PFOS modified with strong electron-withdrawing PFOS and strong electron-donating molecule PHMB 0.75 -PHMB 0.25 Antistatic composite energetic material.

[0144] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0145] Refer to the above method to test the electrostatic accumulation characteristics of CL-20 / RDX raw materials and antistatic CL-20 / RDX@PFOS 0.75 -PHMB 0.25 Composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions is 0.47 nC·g -1 The electrostatic accumulation amount of the CL-20 / RDX mixture raw material under specific conditions is -10.52 nC·g -1 The electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0146] Example 14

[0147] A preparation method of an antistatic composite energetic material that completely avoids charge generation. Compared with Example 4, the difference is that in Step 1 of this example, 3 g of cyclotrimethylenetrinitramine (RDX) is added to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5). Add 0.6 g of graphite powder to it, ultrasonically treat at room temperature for 10 min, and fully stir for 30 min. Dropwise add 0.15 g of sodium hexadecylbenzenesulfonate, magnetically disperse at 600 rpm for 20 min, heat up to 40 °C and keep it warm and static for 4 h, and obtain RDX dispersion after cooling to room temperature.

[0148] The methods and process parameters in Steps 2 to 4 of this example are the same as those in Example 4.

[0149] The antistatic composite energetic material prepared in this example was tested for its electrostatic accumulation characteristics using the same method as in Example 4. The test conditions were as follows: the test charge amount was (5.000 ± 0.001 g), the chute angle was 45°, the chute material was stainless steel, the test temperature was room temperature (25 °C), and the relative humidity was less than 60%. The results showed that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions was -0.05 nC·g -1 , and the electrostatic accumulation amount of the RDX raw material under specific conditions was -11.29 nC·g -1 , the electrostatic accumulation amount of the composite energetic material was significantly reduced and was significantly lower than -4.03 nC·g of Example 4 -1 .

[0150] Example 15

[0151] A method for preparing an antistatic composite energetic material that completely avoids charge generation. Compared with Example 11, the difference is that in Step 1 of this example, 3 g of CL-20 / MNP eutectic was added to 300 ml of an ethanol-water mixed solution (V(ethanol):V(water) = 95:5), 0.6 g of graphite powder was added thereto, ultrasonic treatment was performed at room temperature for 10 min, and it was sufficiently stirred for 30 min. 0.15 g of sodium dodecylbenzenesulfonate was added dropwise, and magnetic dispersion was carried out at 600 rpm for 20 min. After heating to 40 °C, it was kept warm and static for 4 h, and after cooling to room temperature, an RDX dispersion liquid was obtained to obtain a CL-20 / MNP dispersion liquid.

[0152] The methods and process parameters in Steps 2 to 4 of this example are the same as those in Example 10.

[0153] The antistatic composite energetic material prepared in this example was tested for its electrostatic accumulation characteristics using the same method as in Example 10. The test conditions were as follows: the test charge amount was (5.000 ± 0.001 g), the chute angle was 45°, the chute material was stainless steel, the test temperature was room temperature (25 °C), and the relative humidity was less than 60%. The results showed that the electrostatic accumulation amount of the composite energetic material prepared in this example under specific conditions was -0.06 nC·g -1 , and the electrostatic accumulation amount of the CL-20 / MNP eutectic raw material under specific conditions was -11.07 nC·g -1 , the electrostatic accumulation amount of the composite energetic material was significantly reduced and was lower than -0.41 nC·g of Example 11 -1 .

[0154] Comparative Example 1:

[0155] A preparation method of an antistatic composite energetic material that completely avoids charge generation, comprising the following steps:

[0156] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of an ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat for 10 min at room temperature, and stir thoroughly for 30 min to obtain an RDX dispersion;

[0157] Step 2: Use glacial acetic acid to adjust the pH of the above suspension to about 4, and stir evenly;

[0158] Step 3: Dropwise add 2% of the chemical component of potassium perfluorooctanesulfonate (PFOS) with strong electron-accepting function into the mixed solution, reflux at 70 °C, and mechanically stir at 250 r / min for 8 h, cool to room temperature, and wash 3 times with absolute ethanol;

[0159] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain the RDX@PFOS antistatic composite energetic material modified by strong electron-accepting PFOS molecules.

[0160] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this comparative example is shown in Table 1:

[0161] Refer to the above method to test the electrostatic accumulation characteristics of the RDX raw material and the antistatic RDX@PFOS composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this comparative example is -7.69 nC·g -1 , and the electrostatic accumulation amount of the RDX raw material under specific conditions is -11.29 nC·g -1 , and the electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0162] Comparative Example 2:

[0163] A preparation method of an antistatic composite energetic material that completely avoids charge generation, comprising the following steps:

[0164] Step 1: Add 3 g of RDX to 300 ml of an ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat for 10 min at room temperature, and stir thoroughly for 30 min to obtain an RDX dispersion;

[0165] Step 2: Use glacial acetic acid to adjust the pH of the above suspension to about 4, and stir evenly;

[0166] Step 3: Dropwise add 2% of the PHMB chemical component with strong electron-donating function into the mixed solution, reflux at 70 °C, and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash 3 times with absolute ethanol;

[0167] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain the RDX@PHMB antistatic composite energetic material modified by strong electron-donating PHMB molecules.

[0168] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this comparative example is shown in Table 1:

[0169] Refer to the above method to test the electrostatic accumulation characteristics of RDX raw materials and the antistatic RDX@PHMB composite energetic material. The test conditions are as follows: test drug amount (5.000 ± 0.001 g), chute angle 45°, chute material is stainless steel, test temperature is room temperature (25 °C), and relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this comparative example is 4.08 nC·g -1 , and the electrostatic accumulation amount of RDX raw materials under specific conditions is -11.29 nC·g -1 , and the electrostatic accumulation amount of the composite energetic material is significantly reduced.

[0170] Comparative Example 3:

[0171] A preparation method of an antistatic composite energetic material that completely avoids charge generation, including the following steps:

[0172] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat at room temperature for 10 min, and stir thoroughly for 30 min to obtain an RDX dispersion;

[0173] Step 2: Use glacial acetic acid to adjust the pH of the RDX dispersion to about 4 and stir evenly;

[0174] Step 3: Dropwise add the chemical components of potassium perfluorooctanesulfonate (PFOS) with strong electron-withdrawing function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 0.05%, and the mass ratio of PFOS to PHMB is: 0.75:0.25), reflux at 70 °C, and mechanically stir at 250 r / min for 8 h. Cool to room temperature and wash 3 times with absolute ethanol;

[0175] Step 4: Place the obtained sample in a water bath oven and dry at 60 °C for 10 h to obtain RDX@PFOS 0.75 -PHMB modified by strong electron-withdrawing PFOS and strong electron-donating molecule PHMB0.25 Antistatic composite energetic material

[0176] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0177] Refer to the above method for the RDX raw material and antistatic RDX@PFOS 0.75 -PHMB 0.25 The electrostatic accumulation characteristics of the composite energetic material were tested. The test conditions are as follows: the test charge amount is (5.000 ± 0.001 g), the chute angle is 45°, the chute material is stainless steel, the test temperature is room temperature (25 °C), and the relative humidity is less than 60%. The results show that the electrostatic accumulation amount of the composite energetic material prepared in this comparative example is -5.11 nC·g -1 , and the electrostatic accumulation amount of the RDX raw material under specific conditions is -11.29 nC·g -1 , and the electrostatic accumulation amount of the composite energetic material is significantly reduced

[0178] Comparative Example 4:

[0179] A preparation method of an antistatic composite energetic material that completely avoids charge generation, including the following steps:

[0180] Step 1: Add 3 g of cyclotrimethylenetrinitramine (RDX) to 300 ml of an ethanol-water mixed solution (V(ethanol):V(water) = 95:5), ultrasonically treat it for 10 min at room temperature, and stir it thoroughly for 30 min to obtain an RDX dispersion;

[0181] Step 2: Use glacial acetic acid to adjust the pH of the above suspension to about 4 and stir evenly;

[0182] Step 3: Dropwise add the chemical components of potassium perfluorooctanesulfonate (PFOS) with strong electron-accepting function and polyhexamethylene biguanide (PHMB) with strong electron-donating function into the mixed solution (the total mass fraction of PFOS and PHMB is 5%, and the mass ratio of PFOS to PHMB is 0.75:0.25), reflux at 70 °C, and mechanically stir at 250 r / min for 8 h, cool to room temperature, and wash with absolute ethanol 3 times;

[0183] Step 4: Place the obtained sample in a water bath oven and dry it at 60 °C for 10 h to obtain RDX@PFOS 0.75 -PHMB 0.25 Antistatic composite energetic material

[0184] The electrostatic accumulation amount of the antistatic composite energetic material obtained in this example is shown in Table 1:

[0185] The electrostatic accumulation characteristics of the RDX raw material and the antistatic RDX@PFOS 0.75 -PHMB 0.25 composite energetic materials were tested under the following conditions: the test charge amount was (5.000 ± 0.001 g), the chute angle was 45°, the chute material was stainless steel, the test temperature was room temperature (25 °C), and the relative humidity was less than 60%. The results showed that the electrostatic accumulation amount of the composite energetic material prepared in this comparative example was 1.09 nC·g -1 under specific conditions, and the electrostatic accumulation amount of the RDX raw material under specific conditions was -11.29 nC·g -1 indicating that the electrostatic accumulation amount of the composite energetic material was significantly reduced.

[0186] Table 1 Comparison of electrostatic accumulation amounts of composite energetic materials before and after modification in each example and comparative example

[0187]

[0188]

[0189]

[0190] The equipment quantities and processing scales described here are used to simplify the description of the present invention. Applications, modifications, and variations of the present invention will be apparent to those skilled in the art.

[0191] Although the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to specific details and the examples shown and described here.

Claims

1. An antistatic composite energetic material that completely avoids charge generation, characterized in that: The surface of the antistatic composite energetic material has an antistatic coating capable of completely avoiding the generation of electric charges. The antistatic coating is obtained by modifying the surface of the energetic material with chemical components having strong electron accepting and strong electron donating functions.

2. A method for preparing an antistatic composite energetic material that completely avoids charge generation as claimed in claim 1, characterized in that: The following steps are involved: Step 1: adding the energetic material to an ethanol-water mixed solution, ultrasonically treating at room temperature, and fully stirring to obtain an energetic material dispersion; Step 2: Use glacial acetic acid to adjust the pH of the energetic material dispersion to 3-5, stir evenly, and obtain a mixed solution; Step 3: dropwise add the chemical components with strong electron accepting function and strong electron donating function into the mixed solution, reflux, stir for a period of time, cool to room temperature, wash and filter; Step 4: Dry the washed and filtered sample to obtain an antistatic composite energetic material modified with strong electron accepting and strong electron donating molecules.

3. The method for preparing an antistatic composite energetic material that completely avoids charge generation as claimed in claim 2, characterized in that: In the step 1, the energetic material includes any one or a mixture or eutectic of two of hexanitrohexaazaisowurtzitane, octogenin, hexanitrotriaminobenzene, hexanitrotoluene, 3,3′-diamino-4,4′-azofurazan, 3,3′-diamino-4,4′-oxidized azofurazan, 1,1-diamino-2,2-dinitroethylene, 2,4,6-trinitrotoluene, picric acid, 1,3-dinitrobenzene, 1,2-dinitrobenzene, p-nitrochlorobenzene, p-nitroaniline, p-nitrophenol, 3,5-dinitroaniline, 3,5-dinitrotoluene, 2,4-dinitrotoluene, 2,4-dinitrophenol, 3,5-dinitrobenzoic acid, 3,4-dinitrofurazanyl oxide, nitrocellulose, pyrazine-1,4-dioxide, and 1-methyl-3-nitropyrazole.

4. The method for preparing an antistatic composite energetic material that completely avoids charge generation as claimed in claim 2, characterized in that: In the step 1, the volume ratio of ethanol to water is 99:1 to 70:

30.

5. The method for preparing an antistatic composite energetic material that completely avoids charge generation as claimed in claim 2, characterized in that: In the step 1, the ultrasonic treatment time is 5 to 30 minutes.

6. The method for preparing an antistatic composite energetic material that completely avoids charge generation as claimed in claim 2, characterized in that: In the step 1, the stirring method is any one or more of magnetic stirring and mechanical stirring.

7. The method for preparing an antistatic composite energetic material that completely avoids charge generation as claimed in claim 2, characterized in that: In the step 3, the mass of the strong electron accepting and strong electron donating chemical components accounts for 1% to 3% of the mass of the energetic material; The mass ratio of the strong electron accepting chemical component to the strong electron donating chemical component is 0.85:0.15 to 0.65:0.

35.

8. The method for preparing an antistatic composite energetic material that completely avoids charge generation as claimed in claim 2, characterized in that: In the step 3, the reflux temperature is 50-90°C.

9. The method for preparing an antistatic composite energetic material that completely avoids charge generation as claimed in claim 2, characterized in that: In the step 3, the strong electron accepting chemical component includes one of potassium perfluorooctane sulfonate, 3-(trimethoxysilane)propyl acrylate, vinyl trimethoxysilane, and 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl methacrylate; The strong electron donating chemical component includes one of polyhexamethylene biguanide, aminopropyl triethoxysilane, and α-methyl-ω-trimethylsilane tri(dimethylsiloxane).

10. An antistatic composite energetic material that completely avoids charge generation, characterized in that: The antistatic composite energetic material is prepared by the method for preparing an antistatic composite energetic material that completely avoids charge generation as described in any one of claims 2-9.

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