Preparation method of modified free-flow smoke agent based on new electronic interference material

Abstract

The invention discloses a preparation method of a modified free-flowing smoke agent based on a new electronic interference material, and relates to the technical field of interference smoke agents, and the preparation method comprises the following steps: step 1, taking 4A zeolite or superfine hydrophobic silicon dioxide or magnesium-aluminum hydrotalcite in a mass ratio of 1: 10, and respectively placing the 4A zeolite or superfine hydrophobic silicon dioxide or magnesium-aluminum hydrotalcite and the new electronic interference material in a stirring container; 2, stirring for 1-2 hours by using a direct-current stirrer until the two materials are completely and uniformly mixed; 3, the mixed material is placed in a vacuum drying box and subjected to vacuum drying for 12-24 h at the temperature of 60-80 DEG C, and the modified free-flow smoke agent is obtained. 4, the modified free-flow smoke agent is placed in a sealing bag, and nitrogen is introduced for storage. The preparation method has the beneficial effects that the technical problem that a new electron interference material is easy to cake and agglomerate is solved, and the visible light and infrared absorption effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of interfering smoke agents, and in particular to a preparation method of a modified dispersing smoke agent based on a new electronic interference material. Background Art

[0002] With the development of new electronic technology, signal processing theory and control theory, precision guidance technology has gradually become a combination of new electronic technology, signal processing and control theory, and large-scale integrated circuit technology. The corresponding precision guidance weapons have also gradually grown into multi-mode composite guidance, showing a more modern, high-tech strike and annihilation effect on the enemy's rear in the battlefield.

[0003] Currently, one of the effective means to counter precision-guided weapons is to release passive jamming materials. Passive jamming materials are mainly dispersed on the path between the protected target and the precision-guided weapons through physical release, chemical combustion or explosion to form aerosols or smoke clouds. The purpose of shielding and protecting our targets is achieved by reducing the signal strength of the incident electromagnetic wave, changing the electromagnetic wave reflection characteristics of the protected target, and reducing the difference in electromagnetic wave reflection or radiation between the protected target and the background.

[0004] The new electronic interference material developed by our company has good visible light and infrared shielding effects, but due to its small particle size and high surface energy, it has agglomeration and clustering, which affects the release effect. Summary of the invention

[0005] The purpose of the present invention is to provide a method for preparing a modified smoke dispersion agent based on a new electronic interference material, so as to solve the technical problem that the new electronic interference material is prone to agglomeration and clustering, thereby affecting the release effect.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a method for preparing a modified smoke dispersant based on a new electronic interference material, comprising the following steps:

[0007] Step 1: Place 4A zeolite and new electronic interference material in a stirring container at a mass ratio of 1:10;

[0008] Step 2: Use a DC stirrer to stir for 1-2 hours until the two materials are completely mixed;

[0009] Step 3: placing the mixed material in a vacuum drying oven and vacuum drying it at 60°C to 80°C for 12 to 24 hours to obtain a modified smoke dispersant;

[0010] Step 4: Place the modified smoke dispersant in a sealed bag and store it under nitrogen.

[0011] Furthermore, the 4A zeolite in step 1 is replaced by ultrafine hydrophobic silica.

[0012] Furthermore, the 4A zeolite in step 1 is replaced by magnesium aluminum hydrotalcite.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) the addition solves the technical problem of easy agglomeration and aggregation of new electronic interference materials, and the mixed dispersant will not affect the hovering time of the new electronic interference materials; (2) the process is simple, and the dispersant mixing process is carried out at room temperature and pressure; (3) the obtained modified smoke dispersant has good visible light and infrared absorption effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the smoke box.

[0015] Figure 2 The test results of the three schemes in the smoke box are shown in Figure 2. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0017] A patent for new electronic interference materials (application number ZL2024102005041) has been applied for and is yet to be published, which discloses a method for manufacturing new electronic interference materials.

[0018] 4A zeolite, ultrafine hydrophobic fumed silica and magnesium aluminum hydrotalcite were purchased from Baidu Aicaigou.

[0019] Example:

[0020] Option 1: Zeolite A is a non-toxic, odorless, tasteless white powder with good fluidity. It has a network structure, contains uniform small pores, the pore diameter is 0.42nm, and the specific surface area is about 600m2 / g; the mixing container is a 1 cubic meter industrial mixer.

[0021] Step 1: Place 4A zeolite and the new electron interference material in a stirring container at a mass ratio of 1:10; the masses of 4A zeolite (particle size 2-4 μm, specific gravity 2-2.5 g / cm3) and the new electron interference material are 1 kg and 10 kg respectively;

[0022] Step 2: Use a DC stirrer to stir for 1-2 hours until the two materials are completely mixed (the speed is set to 85-150 rpm);

[0023] Step 3: placing the mixed material in a vacuum drying oven and vacuum drying it at 60°C to 80°C for 12 to 24 hours to obtain a modified smoke dispersant;

[0024] Step 4: Place the modified smoke dispersant in a sealed bag and store it under nitrogen.

[0025] Option 2: Ultrafine hydrophobic fumed silica is a widely used dispersant with a very small particle size, so it has a large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion performance, and unique properties in thermal resistance and electrical resistance. With its superior stability, reinforcement, thickening and thixotropy, it has become one of the extremely important high-tech ultrafine inorganic new materials.

[0026] Step 1: Place ultrafine hydrophobic fumed silica and new electron interference material in a stirring container at a mass ratio of 1:10; the masses of ultrafine hydrophobic fumed silica (particle size 1-2 μm, specific gravity 1-2 g / cm3) and new electron interference material are 1 kg and 10 kg respectively;

[0027] Step 2: Use a DC stirrer to stir for 1-2 hours until the two materials are completely mixed (the speed is set to 85-150 rpm);

[0028] Step 3: placing the mixed material in a vacuum drying oven and vacuum drying it at 60°C to 80°C for 12 to 24 hours to obtain a modified smoke dispersant;

[0029] Step 4: Place the modified smoke dispersant in a sealed bag and store it under nitrogen.

[0030] Option 3: Magnesium aluminum hydrotalcite has high fluidity, and also has infrared absorption and flame retardant properties.

[0031] Step 1: Put magnesium aluminum hydrotalcite and new electronic interference material in a mixing container at a mass ratio of 1:10; the masses of magnesium aluminum hydrotalcite (particle size 1-3 μm, specific gravity 2-2.5 g / cm3) and new electronic interference material are 1 kg and 10 kg respectively;

[0032] Step 2: Use a DC stirrer to stir for 1-2 hours until the two materials are completely mixed (the speed is set to 85-150 rpm);

[0033] Step 3: placing the mixed material in a vacuum drying oven and vacuum drying it at 60°C to 80°C for 12 to 24 hours to obtain a modified smoke dispersant;

[0034] Step 4: Place the modified smoke dispersant in a sealed bag and store it under nitrogen.

[0035] The modified smoke dispersant was tested in a smoke box for visible light and mid-to-far infrared shielding properties, and the flowability index and sprayability index were obtained using a powder comprehensive tester.

[0036] Working principle: Visible light and infrared are tested in a smoke box (size 3mx7mx3m). The specific steps are as follows:

[0037] S1: Turn on the constant temperature and humidity air conditioner to keep the indoor space at a constant temperature and humidity;

[0038] S2: Turn on the light source, black body, spectrometer and infrared thermal imager, and wait for the data to stabilize and record the target and background grayscale values ​​of each detector before the smoke screen is released;

[0039] S3: Turn on the smoke spraying equipment, spray the smoke into the room and turn on the stirring fan at the same time, and turn off the stirring fan after the fan runs for 10 seconds after the spraying is finished;

[0040] S4: Turn on the air concentration sampler to take samples and record the grayscale value changes of each detector after the alcohol smoke screen is sprayed.

[0041] As can be seen from the above, in the three schemes, when ultrafine hydrophobic silica is used as a dispersant for modification, on the one hand, after sufficient mechanical mixing, the surface of the smoke material particles is covered with a layer of hydrophobic nanomaterials that do not form hydrogen bonds with water, which plays a certain spatial positive role, preventing adjacent particles from approaching each other due to van der Waals forces, and the agglomeration behavior of the smoke agent is suppressed to a certain extent, with good fluidity and jet properties, not easy to agglomerate during storage, and can be well dispersed into the air during the release process: on the other hand, due to the change in surface properties, after the smoke agent interference particles are dispersed into the air, the collision and agglomeration phenomenon between them is also weakened, so the floating time of the interference material in the air becomes longer, which can form a continuous interference effect on electromagnetic waves, and the continuous interference time is significantly prolonged. .

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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. A method for preparing a modified smoke dispersant based on a new electronic interference material, characterized in that: The following steps are involved: Step 1: Place 4A zeolite and new electronic interference material in a stirring container at a mass ratio of 1:10; Step 2: Use a DC stirrer to stir for 1-2 hours until the two materials are completely mixed; Step 3: placing the mixed material in a vacuum drying oven and vacuum drying it at 60°C to 80°C for 12 to 24 hours to obtain a modified smoke dispersant; Step 4: Place the modified smoke dispersant in a sealed bag and store it under nitrogen.

2. The method for preparing a modified smoke dispersant based on a new electronic interference material according to claim 1, characterized in that: The 4A zeolite in step 1 was replaced by ultrafine hydrophobic silica.

3. The method for preparing a modified smoke dispersant based on a new electronic interference material according to claim 1, characterized in that: The 4A zeolite in step 1 is replaced by magnesium aluminum hydrotalcite.

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