Energetic medicament for component damage as well as preparation method and application of energetic medicament

Abstract

The invention relates to an energetic medicament for component damage and a preparation method and application thereof, and belongs to the technical field of self-destruction of electronic equipment. Firstly, the addition of the components meets the functional requirements, FEP powder subjected to ozone-ultraviolet radiation treatment is added, the oxidability of FEP is further improved, the reaction activity of the energetic agent is improved, the reaction threshold value is reduced, and meanwhile the reaction pressure is increased; high-melting-point and high-density metal powder such as Ta and Mo is added, so that the jet density of the energetic agent is improved; and fluororubber is added as a binder, so that the compression molding of the block material is facilitated together with FEP. And the requirements of a self-destruction system on high calorific value, low threshold value and enough kinetic energy of the energetic medicament are met. And meanwhile, the forming quality of the block material is guaranteed, and storage, transportation and use are convenient.

Description

Technical Field

[0001] The invention relates to an energetic agent for damaging components and a preparation method and application thereof, belonging to the technical field of self-destruction of electronic equipment. Background Art

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

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

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art and to provide an energetic agent for damaging components and a preparation method thereof.

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

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

[0007] Taking the total mass of the raw materials of the energetic agent as 100%, the mass percentage of each component is:

[0008] First metal magnesium powder 15%-30%

[0009] Second metal magnesium powder 0%-15%

[0010] The third component 10%-20%

[0011] FEP powder 20%-30%

[0012] Iron oxide 20%-60%

[0013] Fluororubber 2%-5%

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

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

[0016] The third component is tantalum or molybdenum;

[0017] A method for preparing an energetic agent for damaging components, the method comprising the steps of:

[0018] S1. Pretreatment of FEP powder: Weigh PEP powder and sieve it with a 20-mesh sieve, put it into a vacuum drying oven, and after vacuuming, heat the temperature of the vacuum drying oven to 50-100°C and dry it for 3-6 hours; spread the dried FEP powder evenly in a container and put it into an ozone-ultraviolet radiation device for irradiation for 10-30 minutes. Take out the treated powder for a period of time (2-10 minutes) and stir it for 5-10 minutes;

[0019] S2. Dissolving fluororubber: Cut the fluororubber into small pieces and put them into a beaker equipped with a magnetic rotor. Pour an appropriate amount of solvent into the beaker, and then turn on the magnetic stirring device to stir for 30-60 minutes until the small pieces of fluororubber 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 40-50 mesh sieves respectively, then put them all into a shaker and shake for 30-60 minutes until they are uniform when observed with the naked eye.

[0021] S4, ball milling powder: put the premixed powder of S3 into a ball mill, then weigh a certain mass of grinding balls (about 3-5mm) and put them into the ball mill, and finally remove the magnetic rotor from the solvent of S2 that dissolves the fluororubber and pour it into the ball mill. Preferably, the mass ratio of the ball material is (2-3):1, and the volume ratio of the powder mass to the solvent is 1-5g / mL. Ball milling parameters: ball mill speed 50-70r / min, time 1-3h. During the ball milling process, keep the ball mill opening facing up, that is, stand up for ball milling, and do not need to flip 360°.

[0022] S5. Remove the grinding balls: After the ball milling is completed, take a stainless steel tray and a large-hole sieve, pour the mixture into the sieve, filter out the grinding balls through the sieve, and the mixture flows onto the tray.

[0023] S6. Dry powder: Place the tray containing the mixture in a ventilated place to evaporate the solvent initially. You can use a spoon or shovel to turn it over to accelerate the evaporation of the solution. When there is no obvious solution, put the mixture into a vacuum drying oven, evacuate it, heat it to 50-100℃, and dry it for 6-12h until it is completely dry. After taking it out, filter it with a 40-50 mesh sieve to finally obtain a granular energetic agent.

[0024] S7. Pressed medicine column: In order to achieve uniform destruction effect and provide stable and efficient damage cutting, the powder medicine is usually pressed into a cylindrical shape. Before pressing, the powder containing the energetic medicine needs to be tested to ensure that it can be ignited and can sustain combustion. Then take a certain amount of dry powder and put it into the mold. The molding pressure is driven by the molding machine to press the pressure head. The molding pressure is 80-180MPa and the pressure is maintained for 2-5 minutes before taking it out. According to actual needs, the density of the medicine column is 30% to 90%.

[0025] S8. Storage and transportation: Place a single charge in a covered cylindrical box with an inner diameter slightly larger than its outer diameter, and fill it with hollow alumina balls all around. After it is compacted, close the lid and store or transport it in a cool and dry place away from fire. Preferably, the box is made of plastic to avoid frictional electrification; the diameter of the hollow alumina balls is 1-2 mm to achieve good dense coverage.

[0026] A heating element (such as a resistance wire or a heating rod) is arranged at the center or around the energetic charge, and the heating element can be powered by a circuit board or an independent power supply. The control of the heating element can be achieved through system settings, remote control or a timer. When it is necessary to activate the self-destruction mechanism, a trigger switch (through system settings, remote control or a timer) passes current through the heating element to generate sufficient heat. The heating element will heat up rapidly when working, eventually triggering the ignition or activation of the energetic charge, thereby initiating the self-destruction process.

[0027] Advantages: Simple operation, the excitation time can be controlled by the circuit, suitable for remote or timed self-destruction.

[0028] Beneficial Effects

[0029] First of all, the addition of ingredients meets the functional requirements. The addition of ozone-ultraviolet radiation treated FEP powder further increases the oxidizability of FEP, improves the reactivity of the energetic agent, reduces the reaction threshold, and increases the reaction pressure; the addition of high melting point and high density metal powders such as Ta and Mo increases the jet density of the energetic agent; the addition of fluororubber as a binder together with FEP facilitates the pressing and molding of the bulk material. It meets the requirements of the self-destruct system for the energetic agent to have high calorific value, low threshold, and sufficient kinetic energy. At the same time, the molding quality of the bulk material is guaranteed and it is also convenient for storage, transportation and use.

[0030] One is to use ozone ultraviolet irradiation technology to significantly improve the reactivity of FEP powder, and the ozone-ultraviolet radiation process has a wide range of adaptability to fluorine-containing organics. Without changing the ratio and components, the reactivity and energy release potential of existing fluoropolymer-based energetic agents are fully explored, which reduces the energy spent on material screening to a certain extent.

[0031] One is that in terms of the overall process, only FEP is specially processed, and the reaction activity is low in a single state, which reduces the risk in the preparation process. At the same time, the prepared material is easy to store and maintains the structure. The overall process flow is simple, the process steps are easy to operate, and it has a wide range of adaptability to the process objects, effectively improving production efficiency and saving production costs.

[0032] The reaction of magnesium and iron oxide provides sufficient heat; magnesium and FEP increase the reaction activity, lower the reaction threshold, increase gas production, and release heat; tantalum or molybdenum increases the jet density and conducts heat; at the same time, fluororubber can serve as a "skeleton" to improve the structural strength of the block material and increase the viscosity of the mixed powder, making it easier for the powder to bond and press into shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a graph showing the reaction pressure test results of the energetic agent obtained in Comparative Example 1;

[0034] Figure 2 This is a graph showing the ignition delay time test results of the energetic agent obtained in Comparative Example 1;

[0035] Figure 3 This is a graph showing the reaction pressure test results of the energetic agent obtained in the example;

[0036] Figure 4 This is a graph showing the ignition delay time test results of the energetic agent obtained in the embodiment;

[0037] Figure 5 This is a graph showing the reaction pressure test results of the energetic agent obtained in Comparative Example 2;

[0038] Figure 6 This is a graph showing the ignition delay time test results of the energetic agent obtained in Comparative Example 2. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Example

[0041] Weigh 20g of FEP, sieve it, put it into a vacuum drying oven and dry it at 60℃ for 4h; then ozone-UV radiation for 20min, during which, take it out every 5min and stir and dry mix it for 5min; weigh 21.5g of Mg (average particle size 20μm), 38.5g of Fe2O3, and 18g of Ta (average particle size 3μm) respectively and sieve them, then pour them all into a shaker and premix them for 60min. Weigh 2g of fluororubber, measure 50ml of ethyl acetate, and completely dissolve it to make a mixed solution. Weigh 200g of grinding balls (3-5mm), pour them into a ball mill together with the premixed powder and the mixed solution, and stand the balls upright at a speed of 60r / min for 2h. Subsequently, filter and dry it in a vacuum drying oven at 80℃ for 5h, sieve to obtain a granular energetic agent, and conduct a reaction pressure test on the obtained energetic agent. The results are as follows Figure 3 As shown, the obtained energetic agent was tested for ignition delay time, and the results are as follows Figure 4 shown.

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

[0043] Storage and transportation: Place a single charge in a covered cylindrical box with an inner diameter slightly larger than its outer diameter, and fill it with hollow alumina balls all around. After it is compacted, close the lid and store or transport it in a cool and dry place away from fire. Preferably, the box is made of plastic to avoid frictional electrification; the diameter of the hollow alumina balls is 1-2mm to achieve good dense coverage.

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

[0045] A heating element (such as a resistance wire or a heating rod) is arranged at the center or around the energetic charge, and the heating element can be powered by a circuit board or an independent power supply. The control of the heating element can be achieved through system settings, remote control or a timer. When it is necessary to activate the self-destruction mechanism, a trigger switch (through system settings, remote control or a timer) passes current through the heating element to generate sufficient heat. The heating element will heat up rapidly when working, eventually triggering the ignition or activation of the energetic charge, thereby initiating the self-destruction process.

[0046] Advantages: Simple operation, the excitation time can be controlled by the circuit, suitable for remote or timed self-destruction.

[0047] Comparative Example 1 (addition without treatment)

[0048] Weigh 20g of FEP, 21.5g of Mg (average particle size 20μm), 38.5g of Fe2O3, and 18g of Ta (average particle size 3μm) respectively and sieve them, then pour them into a shaker and premix for 60 minutes. Weigh 2g of fluororubber, measure 50ml of ethyl acetate, and completely dissolve them to make a mixed solution. Weigh 200g of grinding balls (3-5mm), pour them into a ball mill together with the premixed powder and the mixed solution, and grind them upright at a speed of 60r / min for 2h. Then, filter and dry them in a vacuum drying oven at 80°C for 5h, and sieve to obtain a granular energetic agent. The obtained energetic agent was subjected to a reaction pressure test, and the results are as follows. Figure 1 As shown, the obtained energetic agent was tested for ignition delay time, and the results are as follows Figure 2 shown.

[0049] Comparative Example 2

[0050] The energetic agent was prepared in the same manner as in Comparative Example 1, except that no FEP was added. The obtained energetic agent was subjected to a reaction pressure test, and the results were as follows: Figure 5 As shown, the obtained energetic agent was tested for ignition delay time, and the results are as follows Figure 6 shown.

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

[0052] according to Figure 2 , 4 , 6 It can be seen that the ignition delay time of the energetic agent is 0.45s, 0.69s, and 1.30s, respectively. After adding FEP treated with ozone-UV radiation, the delay time of the energetic agent is shortened by 34.8% and 65.4% respectively compared with the untreated energetic agent and the energetic agent without FEP added.

[0053] Therefore, it can be seen that after adding FEP, the reaction pressure of the energetic agent is increased, the delay time is shortened, and the reaction activity is enhanced; and after adding PEP treated with UV-irradiation, the reaction performance of the energetic agent is further improved.

[0054] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energetic agent for damaging components, characterized in that: The raw materials of the energetic agent include first metal magnesium powder, second metal magnesium powder, third component, FEP powder, iron oxide and fluororubber; Taking the total mass of the raw materials of the energetic agent as 100%, the mass percentage of each component is: First metal magnesium powder 15%-30% Second metal magnesium powder 0%-15% The third component 10%-20% FEP powder 20%-30% Iron oxide 20%-60% Fluororubber 2%-5% The particle size of the first metal magnesium powder is 20-30 μm; The particle size of the second metal magnesium powder is 5-10 μm; The third component is tantalum or molybdenum.

2. A method for preparing an energetic agent for damaging components, characterized in that The steps of the method include: In the first step, the FEP powder is pretreated and then irradiated; The second step is to mix the fluororubber and the solvent to obtain a mixture A; The third step is to mix the first metal magnesium powder, the third component, iron oxide and the FEP powder treated in the first step to obtain a mixture B; In the fourth step, the mixture A obtained in the second step and the mixture B obtained in the third step are ball-milled in a ball mill, and dried after the ball-milling to obtain an energetic agent for damaging components.

3. The method for preparing an energetic agent for damaging components according to claim 2, characterized in that: In the first step, the method for pre-treating the FEP powder is: first sieving the PEP powder with a 20-mesh sieve, and then drying it in a vacuum drying oven at a drying temperature of 50-100° C. for a drying time of 3-6 hours.

4. The method for preparing an energetic agent for damaging components according to claim 2, characterized in that: In the first step, the method of irradiating the FEP powder is: placing the FEP powder in an ozone-ultraviolet radiation device for irradiation, and the irradiation procedure is: First irradiate for t1 time, then stop irradiating for t2 time, and then stir for t3 time; Repeat irradiation procedures; The total time until irradiation is 10-30min; Among them, t2=2-10min, t3=5-10min.

5. The method for preparing an energetic agent for damaging components according to claim 2, characterized in that: In the second step, the solvent is at least one of dimethyl sulfoxide, ethanol, ethyl acetate and acetone.

6. The method for preparing an energetic agent for damaging components according to claim 2, characterized in that: In the third step, the first metal magnesium powder, the third component, iron oxide and the FEP powder treated in the first step are sieved with a 40-50 mesh sieve before mixing, and then all are put into a shaker for 30-60 minutes.

7. The method for preparing an energetic agent for damaging components according to claim 2, characterized in that: In the fourth step, the mass ratio of mixture B to mixture A is 1-5 g / mL.

8. The method for preparing an energetic agent for damaging components according to claim 2, characterized in that: In the fourth step, the diameter of the grinding balls in the ball mill is 3-5 mm, the mass ratio of the balls to the materials is (2-3):1, and the ball milling parameters are: the ball milling jar speed is 50-70 r / min, the ball milling time is 1-3 h, and during the ball milling process, the opening of the ball milling jar is kept facing upward, that is, the ball milling is carried out vertically without 360° flipping.

9. The method for preparing an energetic agent for damaging components according to claim 2, characterized in that: In the fourth step, after the ball milling is completed, a stainless steel tray and a large-pore screen are taken, the mixture in the ball mill is poured into the screen, the screen filters out the grinding balls, and the mixture flows onto the tray; then the tray containing the mixture is placed in a ventilated place, the solvent is initially evaporated, and a spoon or shovel is used to turn it over to accelerate the evaporation of the solution, and then the mixture is placed in a vacuum drying oven, after vacuuming, heated to 50-100° C., and dried for 6-12 hours. After drying, it is filtered through a 40-50 mesh sieve to finally obtain a granular energetic agent.

10. An application of an energetic agent for damaging components, characterized in that: The obtained energetic agent is pressed into a cylindrical shape, and a heating element is arranged 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-destruction mechanism needs to be activated, the trigger switch passes current through the heating element. The heating element will heat up rapidly when working, and eventually trigger the ignition or activation of the energetic agent column, thereby starting the self-destruction process.

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