An energetic agent for component damage and its preparation method and application

Abstract

The present application relates to a kind of energetic agent for component damage and its preparation method and application, belong to the technical field of self-destruction of electronic equipment.First, the addition on component meets the requirement on function, add FEP powder treated by ozone-ultraviolet radiation, further increase the oxidizability of FEP, improve the reaction activity of energetic agent, reduce the reaction threshold value, increase the reaction pressure at the same time;Add Ta, Mo and other high melting point, high density metal powder, improve the jet density of energetic agent;Add fluorine rubber, as binder and FEP together to facilitate the compaction of block material.Forming quality of block material is satisfied with self-destruction system, the requirement of energetic agent high calorific value, threshold low, with enough kinetic energy.At the same time, it is also convenient for storage, transportation and use to guarantee the forming quality of block material.

Description

TECHNICAL FIELD

[0001] The present application relates to an energetic agent for component destruction and its preparation method and application, belonging to the technical field of self-destruction of electronic equipment. BACKGROUND

[0002] In modern electronic equipment, components such as mobile phones, hard drives, and computers may require efficient self-destruction function under extreme conditions to protect confidential information and prevent misuse of equipment. This self-destruction mechanism is particularly important in military, intelligence, financial, and high-tech fields, ensuring that information is not leaked or illegally used in the event of unauthorized access, loss, or capture of equipment. Energetic agents, due to their small size, fast reaction, and strong destructive power, are widely used in various self-destruction systems as destructive components.

[0003] These agents can rapidly release a large amount of energy under specific trigger conditions, quickly destroying the core components of the equipment, such as memory chips and circuit boards. To achieve the desired destruction effect, energetic agents not only need to have a high combustion enthalpy, but also need to have appropriate reaction rate, sufficient reaction pressure, and jet density. Magnesium thermite is a typical energetic agent composed mainly of magnesium powder and metal oxides, with the advantages of high adiabatic temperature, high combustion efficiency, high reaction exothermic enthalpy, good safety, and flexible formulation, and has broad application prospects in self-destruction systems. However, traditional single-component magnesium thermite has high reaction threshold, low pressure, and low jet density, which cannot meet the needs of special destruction application scenarios. SUMMARY

[0004] The technical problem solved by the present application is to overcome the shortcomings of the prior art and provide an energetic agent for component destruction and its preparation method.

[0005] The technical solution of the present application is:

[0006] An energetic agent for component destruction, the raw materials of the energetic agent include first magnesium powder, second magnesium powder, third component, FEP powder (fluorinated ethylene propylene copolymer, also known as polyperfluoroethylene propylene), iron oxide, and fluororubber;

[0007] The mass percentage of each component is calculated based on the total mass of the raw materials of the energetic agent being 100%:

[0008] First magnesium powder 15%-30%

[0009] Second magnesium powder 0%-15%

[0010] Third component 10%-20%

[0011] FEP powder 20%-30%

[0012] Iron oxide 20%-60%

[0013] Fluorine rubber 2%-5%

[0014] The particle size of the first magnesium metal powder is 20-30 μm;

[0015] The particle size of the second magnesium metal powder is 5-10 μm;

[0016] The third component is tantalum or molybdenum;

[0017] A preparation method of an energetic agent for component damage, the steps of the method comprising:

[0018] S1, FEP powder pretreatment: weigh the FEP powder and sieve it with a 20-mesh sieve, place it in a vacuum drying oven, after vacuumizing, heat the temperature of the vacuum drying oven to 50-100℃, dry for 3-6h; evenly spread the dried FEP powder in a container and place it in an ozone-ultraviolet radiation device, irradiate for 10-30min, take out the treated powder to stir every 2-10min, stir for 5-10min;

[0019] S2, dissolve the fluorine rubber: cut the fluorine rubber into small pieces and place it in a beaker with a magnetic rotor, pour an appropriate amount of solvent into the beaker, then turn on the magnetic stirring device to stir for 30-60min until the small pieces of fluorine rubber are completely dissolved, the solvent used includes one or more of dimethyl sulfoxide, ethanol, ethyl acetate and acetone.

[0020] S3, powder premixing: weigh a certain amount of pretreated FEP powder, weigh magnesium powder, iron oxide, tantalum or molybdenum and sieve them with a 40-50-mesh sieve, then put them all into a shaker and shake for 30-60min until they are evenly distributed.

[0021] S4, ball-milling powder: put the S3 premixed powder into a ball-milling tank, then weigh a certain amount of grinding balls (about 3-5mm) and put them into the ball-milling tank, finally remove the magnetic rotor of the S2 dissolved fluorine rubber solvent and pour it into the ball-milling tank. Preferably, the mass ratio of balls to powder is (2-3):1, and the mass ratio of powder to solvent is 1-5g / mL. Ball-milling parameters: ball-milling tank speed 50-70r / min, time 1-3h. During ball-milling, keep the opening of the ball-milling tank facing upwards, i.e. vertical ball-milling, without 360° rotation.

[0022] S5, remove the grinding balls: after ball-milling, take a stainless steel tray and a large-pore sieve, pour the mixture into the sieve, filter out the grinding balls, and let the mixture flow onto the tray.

[0023] S6, drying powder: Put the tray containing the mixture in a ventilated place, and first evaporate the solvent. You can use a spoon or a shovel to flip it to speed up the evaporation of the solution. After there is no obvious solution, put the mixture into a vacuum drying oven, vacuumize, heat at 50-100°C, and dry for 6-12h until completely dry. After taking out, filter with a 40-50 mesh sieve to obtain granular energetic agent.

[0024] S7, pressing the pill: To achieve uniform destruction effect and provide stable and efficient damage cutting, the powder is usually pressed into a cylindrical shape. Before pressing, the powder of energetic agent needs to be tested to ensure that it can be ignited and self-sustaining combustion. Then take a certain amount of dry powder and put it into the mold, and press it with the press head driven by the mold press. The forming pressure is 80-180MPa, and the pressure is maintained for 2-5min before taking out. According to actual needs, the density of the pill is 30%-90%.

[0025] S8, storage and transportation: Put a single pill into a cylindrical box with a lid whose inner diameter is slightly larger than the outer diameter of the pill, and fill the surrounding with alumina hollow balls. After compacting, close the lid and store or transport in a cool and dry place away from fire. Preferably, the material of the box is plastic to avoid friction electrification; the diameter of the alumina hollow ball is 1-2mm to achieve good compaction coverage.

[0026] A heating element (such as a resistance wire, heating rod) is arranged in the center or around the energetic pill, which can be powered by a circuit board or an independent power supply. The control of the heating element can be realized by system setting, remote control or timer. When the self-destruction mechanism needs to be started, the switch (through system setting, remote control or timer) will pass current through the heating element to generate enough heat. The heating element will heat up quickly when working, eventually triggering the ignition or activation of the energetic pill, thereby starting the self-destruction process.

[0027] Advantages: simple operation, can control the activation time through the circuit, suitable for remote or timed self-destruction.

[0028] Beneficial effects

[0029] First, the addition of ingredients meets the functional requirements. The addition of FEP powder treated by ozone-ultraviolet radiation further increases the oxidation of FEP, improves the reactivity of energetic agent, reduces the reaction threshold, and increases the reaction pressure; the addition of Ta, Mo and other high-melting-point, high-density metal powders increases the jet density of energetic agent; the addition of fluororubber as a binder together with FEP facilitates the pressing and molding of block materials. It meets the requirements of the self-destruction system, high heat value, low threshold and sufficient kinetic energy of the energetic agent. At the same time, it ensures the molding quality of the block material and is convenient for storage, transportation and use.

[0030] One is to use ozone ultraviolet radiation technology to significantly improve the reaction activity of FEP powder, and the ozone-ultraviolet radiation process has wide adaptability to fluorine-containing organic matter. Without changing the ratio and components, the reaction activity and energy release potential of the existing fluoropolymer-based energetic agent are fully explored, which to some extent reduces the effort spent on material screening.

[0031] One is that the overall process only FEP is subjected to special process treatment, and the reaction activity is low in a single state, which reduces the risk in the preparation process, and the prepared material is also easy to store and maintain the structure. The overall process flow is simple, the process steps are easy to operate, and it has wide adaptability to process objects, effectively improves the production efficiency, and saves the production cost.

[0032] Magnesium reacts with iron oxide to provide sufficient heat; magnesium and FEP increase the reaction activity, reduce the reaction threshold, increase the gas production, and release heat; tantalum or molybdenum increases the jet density and conducts heat; at the same time, it can be used as a "skeleton" to improve the structural strength of the block material. Fluorine rubber increases the viscosity of the mixed powder, which is convenient for powder bonding and compression molding. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The reaction pressure test result graph of the energetic agent obtained from Comparative Example 1 is shown in the figure;

[0034] Figure 2 The ignition delay time test result graph of the energetic agent obtained from Comparative Example 1 is shown in the figure;

[0035] Figure 3 The reaction pressure test result graph of the energetic agent obtained from the embodiment is shown in the figure;

[0036] Figure 4 The ignition delay time test result graph of the energetic agent obtained from the embodiment is shown in the figure;

[0037] Figure 5 The reaction pressure test result graph of the energetic agent obtained from Comparative Example 2 is shown in the figure;

[0038] Figure 6 The ignition delay time test result graph of the energetic agent obtained from Comparative Example 2 is shown in the figure. DETAILED DESCRIPTION

[0039] The application will be further described below in combination with the drawings and examples.

[0040] EMBODIMENT

[0041] Take 20g of FEP and sieve it, then put it in a vacuum drying oven at 60°C for 4 hours. Then, perform ozone-ultraviolet radiation for 20 minutes, during which, every 5 minutes, take it out, stir and dry for 5 minutes. Take 21.5g of Mg (average particle size 20μm), 38.5g of Fe2O3, and 18g of Ta (average particle size 3μm) and sieve them, then put them all into a shaker and mix for 60 minutes. Take 2g of fluoro rubber, measure 50ml of ethyl acetate, and completely dissolve to make a mixed solution. Take 200g of grinding balls (3-5mm), put them into the ball mill tank together with the pre-mixed powder and the mixed solution, and directly vertical ball mill at a speed of 60r / min for 2 hours. Then, filter and dry in a vacuum drying oven at a temperature of 80°C for 5 hours, sieve to obtain granular energetic agent. Perform reaction pressure test on the obtained energetic agent, and the results are shown in Figure 3 Perform ignition delay time test on the obtained energetic agent, and the results are shown in Figure 4

[0042] Pressing the propellant column: to achieve uniform damage effect and provide stable and efficient damage cutting, the powder agent is pressed into a cylindrical shape. Before pressing, the powder of the energetic agent needs to be tested to ensure that it can be ignited and can sustain combustion. Then, a certain amount of dry powder is put into the mold and pressed by the press head driven by the molding machine. The molding pressure is 80-180MPa, and the pressure is maintained for 2-5 minutes before taking out. According to actual needs, the density of the propellant column is 30%-90%.

[0043] Storage and transportation: place a single propellant column into a cylindrical box with a lid whose inner diameter is slightly larger than the outer diameter of the propellant column, fill the surrounding with alumina hollow balls, close the lid after compacting, and store or transport in a cool and dry place away from fire sources. Preferably, the material of the box is plastic to avoid friction electrification; the diameter of the alumina hollow balls is 1-2mm to achieve good compaction coverage.

[0044] Put the pressed cylindrical energetic agent into a cylindrical box whose inner diameter is slightly larger than the outer diameter of the cylindrical energetic agent, and finally embed it in the electronic device to be self-destroyed, trigger, and destroy the electronic device to be self-destroyed.

[0045] A heating element (such as a resistance wire or a heating rod) is arranged at the center or around the energetic propellant column, which can be powered by a circuit board or an independent power supply. The control of the heating element can be realized by system setting, remote control or timer. When the self-destruction mechanism needs to be started, the trigger switch (through system setting, remote control or timer) passes current through the heating element to generate enough heat. The heating element will heat up quickly when working, and eventually ignite or activate the energetic propellant column, thereby starting the self-destruction process.

[0046] Advantages: simple operation, can control the ignition time through the circuit, suitable for remote or timed self-destruction. ​

[0047] Comparative Example 1 (only adding without treatment)

[0048] 20 g of FEP, 21.5 g of Mg (average particle size 20 μm), 38.5 g of Fe2O3, 18 g of Ta (average particle size 3 μm) were weighed respectively and sieved, then poured into a shaker for 60 min of pre-mixing. 2 g of fluoro rubber was weighed, 50 ml of ethyl acetate was measured, and a mixed solution was prepared by complete dissolution. 200 g of grinding balls (3-5 mm) were weighed, together with the pre-mixed powder and the mixed solution were poured into a ball mill tank for 2 h of vertical ball milling at a speed of 60 r / min. Then, filtration and drying in a vacuum drying oven at a temperature of 80 °C for 5 h were performed, and a granular energetic agent was obtained by sieving. The obtained energetic agent was subjected to reaction pressure test, and the results are shown in Figure 1 The obtained energetic agent was subjected to ignition delay time test, and the results are shown in Figure 2 .

[0049] Comparative Example 2

[0050] The energetic agent was prepared in the manner of Comparative Example 1, except that FEP was not added. The obtained energetic agent was subjected to reaction pressure test, and the results are shown in Figure 5 The obtained energetic agent was subjected to ignition delay time test, and the results are shown in Figure 6 .

[0051] According to the data of Figure 1 , 3 , 5, the reaction pressure of the energetic agent was 318.7 MPa, 294.3 MPa, 261.9 MPa, respectively. After adding the FEP treated by ozone-ultraviolet radiation, the reaction pressure of the energetic agent was increased by 8.3%, 21.7% compared with the samples without treatment and without adding FEP, respectively.

[0052] According to the data of Figure 2 , 4 , 6, the ignition delay time of the energetic agent was 0.45 s, 0.69 s, 1.30 s, respectively. After adding the FEP treated by ozone-ultraviolet radiation, the delay time of the energetic agent was shortened by 34.8%, 65.4% compared with the energetic agent without treatment and without adding FEP, respectively.

[0053] Therefore, it can be known that after adding FEP, the reaction pressure of the energetic agent is increased, the delay time is shortened, and the reaction activity is enhanced. After adding the PEP treated by ultraviolet radiation, the reaction performance of the energetic agent is further improved.

[0054] In conclusion, the above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing an energetic agent for damaging components, wherein the raw materials of the energetic agent include a first metallic magnesium powder, a second metallic magnesium powder, a third component, FEP powder, iron oxide, and fluororubber; Based on the total mass of the raw materials containing the energetic agent being 100%, the mass percentage of each component is as follows: First Metal Magnesium Powder 15%-30% Secondary magnesium powder 0%-15% The third component is 10%-20%. FEP powder 20%-30% Iron oxide 20%-60% Fluororubber 2%-5% The particle size of the first metallic magnesium powder is 20-30 μm; The particle size of the second metallic magnesium powder is 5-10 μm; The third component is tantalum or molybdenum; Its features The steps of this method include: The first step is to pretreat the FEP powder and then irradiate it; The second step is to mix the fluororubber and the solvent to obtain mixture A; The third step involves mixing the first metallic magnesium powder, the third component, iron oxide, and the FEP powder treated in the first step to obtain mixture B. The fourth step involves ball milling the mixture A obtained in the second step and the mixture B obtained in the third step in a ball mill, and then drying them after ball milling to obtain an energetic agent for damaging components. In the first step, the method for irradiating FEP powder is as follows: the FEP powder is placed in an ozone-ultraviolet radiation device for irradiation, and the irradiation procedure is as follows: Irradiate for time t1, then stop irradiating for time t2, and then stir for time t3; Repeated irradiation procedures; The total irradiation time is 10-30 minutes. Where t2 = 2-10 min, t3 = 5-10 min.

2. The method for preparing an energetic agent for damaging components according to claim 1, characterized in that: In the first step, the method for pre-treating FEP powder is as follows: first, the PEP powder is sieved through a 20-mesh sieve, and then dried in a vacuum drying oven at a temperature of 50-100 ℃ for 3-6 h.

3. The method for preparing an energetic agent for damaging components according to claim 1, characterized in that: In the second step, the solvent is at least one of dimethyl sulfoxide, ethanol, ethyl acetate, and acetone.

4. The method for preparing an energetic agent for damaging components according to claim 1, characterized in that: In the third step, before mixing the first metallic magnesium powder, the third component, iron oxide, and the FEP powder treated in the first step, each component is sieved through a 40-50 mesh sieve, and then all of them are placed in a shaker and shaken for 30-60 minutes.

5. The method for preparing an energetic agent for damaging components according to claim 1, characterized in that: In the fourth step, the mass ratio of mixture B to the volume ratio of mixture A is 1-5 g / mL.

6. The method for preparing an energetic agent for damaging components according to claim 1, characterized in that: In the fourth step, the diameter of the grinding balls in the ball mill is 3-5mm, the mass ratio of the balls to the material is (2-3):1, and the ball milling parameters are: the rotation speed of the ball mill jar is 50-70 r / min, the ball milling time is 1-3 h, and during the ball milling process, the opening of the ball mill jar is kept facing upward, that is, the ball mill is held upright and does not need to be rotated 360°.

7. The method for preparing an energetic agent for damaging components according to claim 1, characterized in that: In the fourth step, after ball milling, take a stainless steel tray and a large-mesh sieve. Pour the mixture from the ball mill jar into the sieve, filter out the grinding balls, and let the mixture flow onto the tray. Then place the tray containing the mixture in a ventilated place to allow the solvent to evaporate initially. Stir the mixture with a spoon or shovel to accelerate the evaporation. Then put the mixture into a vacuum drying oven, evacuate the vacuum, heat to 50-100 ℃, and dry for 6-12 hours. After drying, filter through a 40-50 mesh sieve to finally obtain granular energetic reagent.

8. The application of an energetic agent for damaging components, characterized in that: The energetic agent prepared by any of the methods in claims 1-7 is pressed into a cylindrical shape. A heating element is set in the center or around the energetic agent column. The heating element is powered by a circuit board or an independent power supply. When the self-destruct mechanism needs to be activated, a trigger switch passes current through the heating element. The heating element heats up rapidly when it is working, which eventually triggers the ignition or activation of the energetic agent column, thereby initiating the self-destruct process.

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