An electrically heated deicing film and methods of making and using the same

Abstract

The present application relates to the technical field of electromagnetic wave-transparent material, and particularly relates to an electric heating anti-icing film and a preparation method and application thereof. The electric heating anti-icing film provided by the present application comprises a micro-fiber bundle mesh and a polymer doped with nano-conductive particles; the polymer comprises an electromagnetic wave-transparent polymer; the polymer doped with nano-conductive particles is distributed on the surface of the mesh structure and the surface of the wave-transparent pore structure of the micro-fiber bundle mesh; the wave-transparent pore structure of the electric heating anti-icing film comprises a macroscopic wave-transparent pore structure and a microscopic wave-transparent pore structure; the pore diameter of the macroscopic wave-transparent pore structure is a millimeter-level pore diameter, and the pore diameter of the microscopic wave-transparent pore structure comprises a micrometer-level pore diameter and a nanometer-level pore diameter. The electric heating anti-icing film can guarantee electromagnetic wave-transparent performance while having electric heating anti-icing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic wave-transparent materials, in particular to an electric heating de-icing film and a preparation method and application thereof. BACKGROUND

[0002] The surface of a stealth aircraft, a radar cover and the like usually adopts a composite material to improve its working reliability, and the core requirement is high wave-transparency and reduced electromagnetic wave reflection. However, the existing composite material usually has the characteristics of poor heat resistance and poor thermal conductivity, which causes it to be unable to achieve the purpose of de-icing in the process of use. In the existing de-icing technology, the application of thermal de-icing is the most widespread, and the temperature of hot air de-icing in the thermal de-icing technology is too high, and the composite material cannot withstand it; at the same time, the heating element for electric heating de-icing has high electrical conductivity, which will cause strong reflection of electromagnetic waves, and all of them cannot meet the requirement of high wave-transparency of the stealth aircraft and the radar cover. SUMMARY

[0003] The purpose of the present application is to provide an electric heating de-icing film and a preparation method and application thereof, which can guarantee electromagnetic wave-transparency while having electric heating de-icing.

[0004] In order to achieve the above-mentioned purpose of the application, the present application provides the following technical scheme:

[0005] The present application provides an electric heating de-icing film, which comprises a micro-fiber bundle mesh cloth and a polymer doped with nano-conductive particles; the polymer comprises an electromagnetic wave-transparent polymer;

[0006] The polymer doped with nano-conductive particles is distributed on the surface of the mesh structure and the surface of the wave-transparent pore structure of the micro-fiber bundle mesh cloth;

[0007] The wave-transparent pore structure of the electric heating de-icing film comprises a macroscopic wave-transparent pore structure and a microscopic wave-transparent pore structure;

[0008] The pore diameter of the macroscopic wave-transparent pore structure is a millimeter-level pore diameter, and the pore diameter of the microscopic wave-transparent pore structure comprises a micrometer-level pore diameter and a nanometer-level pore diameter.

[0009] Preferably, the size of the macroscopic wave-transparent pore structure and the microscopic wave-transparent pore structure is steplessly regulated.

[0010] Preferably, the mass ratio of the nano-conductive particles to the polymer in the polymer doped with nano-conductive particles is 1:(0.025-0.25).

[0011] Preferably, the mass ratio of the micro-fiber bundle mesh cloth to the polymer doped with nano-conductive particles is 1:(0.1-5).

[0012] Preferably, the micro-fiber bundle mesh cloth is obtained by weaving after the fiber filaments are bundled.

[0013] The diameter of the fiber filaments is 1-20 μm.

[0014] Preferably, the material of the fiber filaments comprises one or more of cotton fiber, bamboo fiber, wool fiber, silk fiber, glass fiber, polyester fiber, polyamide fiber and polyacrylonitrile fiber.

[0015] Preferably, the particle size of the nano-conductive particles is 1-100 nm.

[0016] The nano-conductive particles comprise one or more of carbon material, conductive metal material and conductive polymer.

[0017] Preferably, the electromagnetic wave-transparent polymer comprises one or more of polyurethane, silicone rubber and thermoplastic elastomer.

[0018] The application also provides a preparation method of the electric heating anti-icing film as described in the above technical solution, comprising the following steps:

[0019] Mixing the nano-conductive particles, the polymer and the solvent to obtain a film material dispersion liquid;

[0020] Depositing the film material dispersion liquid on the micro-fiber bundle mesh cloth to obtain the electric heating anti-icing film.

[0021] The application also provides an application of the electric heating anti-icing film as described in the above technical solution or the electric heating anti-icing film prepared by the preparation method as described in the above technical solution in the windward surface or radar cover of a stealth aircraft.

[0022] The application provides an electric heating anti-icing film, comprising a micro-fiber bundle mesh cloth and a polymer doped with nano-conductive particles; the polymer comprises an electromagnetic wave-transparent polymer; the polymer doped with nano-conductive particles is distributed on the surface of the mesh structure and the wave-transparent pore structure of the micro-fiber bundle mesh cloth; the wave-transparent pore structure of the electric heating anti-icing film comprises a macroscopic wave-transparent pore structure and a microscopic wave-transparent pore structure; the pore diameter of the macroscopic wave-transparent pore structure is a millimeter-level pore diameter, and the pore diameter of the microscopic wave-transparent pore structure comprises a micrometer-level pore diameter and a nanometer-level pore diameter. The wave-transparent pore structure of the electric heating anti-icing film ensures that the wave-transparent rate thereof can be adjusted in the range of 60-90% in the frequency range of 0.3-18 GHz; the conductive nano-particles dispersed in the polymer form a conductive network, and the electric conductivity thereof can be adjusted in the range of 5-200 S / m; meanwhile, the polymer doped with nano-conductive particles and the micro-fiber bundle mesh cloth can form a strong mechanical interlocking structure, so that the conductive network has strong robustness; the polymer and the mesh cloth both have good flexibility, thereby ensuring the excellent flexibility and curved surface coating adaptability of the integrated anti-icing film. The electric heating anti-icing film can be used for the surface of stealth aircraft, radar cover and other equipment, and meanwhile, the electromagnetic wave-transparent performance is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Structure diagram of the square structure fiber mesh cloth described in Example 1;

[0024] Figure 2 Structure diagram of the diamond structure fiber mesh cloth described in Example 2;

[0025] Figure 3 Structure diagram of the circular structure fiber mesh cloth described in Example 3;

[0026] Figure 4 Structure diagram of the round-corner square structure fiber mesh cloth described in the application;

[0027] Figure 5 The wave-transparent coefficient curve of the electric heating anti-icing film described in Example 1 at the frequency of 0.3-18 GHz;

[0028] Figure 6 The wave-transparent coefficient curve of the electric heating anti-icing film described in Example 2 at the frequency of 0.3-18 GHz;

[0029] Figure 7 The wave-transparent coefficient curve of the electric heating anti-icing film described in Example 3 at the frequency of 0.3-18 GHz;

[0030] Figure 8A schematic diagram of the wave-transparent pore structure of the electric heating de-icing film according to the present application, wherein 1 is the electric heating de-icing film, 2 is the macroscopic wave-transparent pore structure of millimeter level, 3 is the microscopic wave-transparent pore structure of micrometer level, and 4 is the microscopic wave-transparent pore structure of nanometer level.

[0031] Figure 9 A schematic diagram of the preparation method flow of the electric heating de-icing film according to the present application, wherein 5 is the polymer, 6 is the nano-conductive particle, 7 is the solvent, 8 is the fiber bundle mesh cloth of micrometer level, and 9 is the electric heating de-icing film.

[0032] Figure 10 A structure of the fiber bundle in the fiber bundle mesh cloth of micrometer level according to the present application, wherein 10 is the untwisted fiber bundle, and 11 is the twisted fiber bundle.

[0033] Figure 11 A schematic diagram of the electromagnetic wave-transparent and conductive current passage of the electric heating de-icing film according to the present application. DETAILED DESCRIPTION

[0034] The present application provides an electric heating de-icing film, which comprises a fiber bundle mesh cloth of micrometer level and a polymer doped with a nano-conductive particle.

[0035] The polymer doped with the nano-conductive particle is distributed on the mesh structure surface and the wave-transparent pore structure surface of the fiber bundle mesh cloth of micrometer level.

[0036] The wave-transparent pore structure of the electric heating de-icing film comprises a macroscopic wave-transparent pore structure and a microscopic wave-transparent pore structure.

[0037] The pore diameter of the macroscopic wave-transparent pore structure is a millimeter level pore diameter, and the pore diameter of the microscopic wave-transparent pore structure comprises a micrometer level pore diameter and a nanometer level pore diameter (for example, Figure 8 as shown, wherein 1 is the electric heating de-icing film, 2 is the macroscopic wave-transparent pore structure of millimeter level, 3 is the microscopic wave-transparent pore structure of micrometer level, and 4 is the microscopic wave-transparent pore structure of nanometer level).

[0038] In the present application, the macroscopic wave-transparent pore structure is a grid wave-transparent pore structure obtained after the polymer doped with nano-conductive particles is distributed on the surface of the grid structure of the micron-level fiber bundle mesh; the micron-level microscopic wave-transparent pore structure is provided by the electromagnetic wave-transparent fiber filaments, and the polymer doped with nano-conductive particles cannot be dispersed in the fiber filaments, thus forming a continuous micron wave-transparent pore structure that can transmit electromagnetic waves; the nano-level microscopic wave-transparent pore structure is a nano-gap existing in the network structure formed by self-assembly of nano-conductive particles, and the conductive network formed by the nano-conductive particles is not dense, but a network structure formed by self-assembly of nano-conductive particles, and a large number of nano-level wave-transparent pores exist in the network structure, thus forming a nano wave-transparent pore structure that can transmit electromagnetic waves; the medium in the wave-transparent pores in the millimeter-level wave-transparent pore structure, the micron-level wave-transparent pore structure and the nano-level wave-transparent pore structure is air, fiber filaments and polymer in turn, and all are electromagnetic wave-transparent media, thus forming a three-level wave-transparent structure that can provide a path for the electromagnetic wave-transparent electrically-heated deicing film under the synergistic effect.

[0039] In the present application, the size of the macroscopic wave-transparent pore structure and the microscopic wave-transparent pore structure is preferably stepless.

[0040] In the present application, the diameter of the fiber bundle of the nano-level fiber bundle mesh is preferably 5-100 μm, more preferably 10-50 μm, and most preferably 20-40 μm; the grid shape in the nano-level fiber bundle mesh is preferably an axisymmetric pattern, and more preferably a square (as shown in Figure 1 , a rhombus (as shown in Figure 2 , a circle (as shown in Figure 3 , or a rounded square (as shown in Figure 4 ). When the grid shape is a square, a rhombus or a rounded square, the side length of the grid shape is preferably 1-10 mm, more preferably 1-5 mm; the center distance between adjacent two grids is preferably 1-20 mm, more preferably 1-15 mm, and most preferably 1-10 mm; when the grid shape is a circle, the diameter of the grid shape is preferably 1-10 mm, more preferably 1-5 mm; the center distance between adjacent two grids is preferably 1-20 mm, more preferably 1-15 mm, and most preferably 1-10 mm.

[0041] In the present application, the micron-level fiber bundle mesh is preferably obtained by braiding the fiber filaments after bundling; the diameter of the fiber filaments is preferably 1-20 μm, more preferably 1-10 μm, and most preferably 1-5 μm. In the present application, the number of the fiber filaments in the fiber bundle obtained after bundling is preferably 5-100, more preferably 10-50, and most preferably 20-40; in the present application, the bundling form is preferably untwisted (the structure of the obtained fiber bundle is as shown in Figure 10as shown, wherein 10 is a non-twisted fiber bundle) or twisted (the structure of the obtained fiber bundle is as shown in Figure 10 as shown, wherein 11 is a twisted fiber bundle), more preferably twisted; the present application does not have any special limitation on the process of the twisting, which can be performed by using the process well known to those skilled in the art. In the present application, the fiber bundle obtained by twisting can enhance the mechanical interlocking between the film material and the fiber, thereby improving the strength of the film. The present application does not have any special limitation on the process of the weaving, which can be performed by using the process well known to those skilled in the art.

[0042] In the present application, the material of the fiber yarn preferably includes one or more of cotton fiber, bamboo fiber, wool fiber, silk fiber, glass fiber, polyester fiber, polyamide fiber and polyacrylonitrile fiber; when the material of the fiber yarn is two or more of the above-mentioned specific choices, the present application does not have any special limitation on the ratio of the above-mentioned specific materials, which can be mixed in any ratio.

[0043] In the present application, the particle size of the nano-conductive particles in the polymer doped with nano-conductive particles is preferably 1-100 nm, more preferably 20-80 nm, and most preferably 30-60 nm. In the present application, the nano-conductive particles preferably include one or more of carbon material, conductive metal material and conductive polymer, the carbon material preferably includes one or more of carbon nanotube, graphene, graphite powder and carbon nanofiber; the conductive metal material preferably includes copper powder and / or silver powder; the conductive polymer preferably includes one or more of polyacetylene, polypyrrole, polythiophene and polyaniline; when the nano-conductive particles are two or more of the above-mentioned specific choices, the present application does not have any special limitation on the ratio of the above-mentioned specific substances, which can be performed by using the process well known to those skilled in the art.

[0044] In the present application, the electromagnetic wave-transparent polymer preferably includes one or more of polyurethane, silicone rubber and thermoplastic elastomer, when the electromagnetic wave-transparent polymer is two or more of the above-mentioned specific choices, the present application does not have any special limitation on the ratio of the above-mentioned specific substances, which can be mixed in any ratio. In the present application, the above-mentioned polymer has high mechanical strength, strong insulation and strong flexibility.

[0045] In the present application, the mass ratio of the nano-conductive particles and the polymer in the polymer doped with nano-conductive particles is preferably 1:(0.025-0.25), more preferably 1:(0.05-0.2), and most preferably 1:(0.1-0.15).

[0046] In the present application, the mass ratio of the micro-scale fiber bundle mesh and the polymer doped with nano-conductive particles is preferably 1:(0.1-5), more preferably 1:(0.3-3), and most preferably 1:(0.5-2).

[0047] In this invention, the electromagnetic wave transmission and conductive current pathways of the electrically heated anti-icing film are as follows: Figure 11 As shown, by Figure 11 It is known that when electromagnetic waves are incident perpendicularly onto the electrically heated anti-icing film, unlike traditional continuous and dense electrically heated materials which cause severe electromagnetic reflection, the millimeter-scale patterned wave-transparent pores of the mesh fabric provide a macroscopic pathway for electromagnetic wave diffraction, allowing some electromagnetic waves to pass through the electrically heated anti-icing film through these millimeter-scale patterned wave-transparent pores. The fibers inside the polymer doped with nano-conductive particles provide micrometer-scale wave-transparent channels, and the nano-wave-transparent pores between the nano-conductive particles provide nanoscale channels. The combined effect of these macro-, micro-, and nano-scale wave-transparent pores significantly enhances electromagnetic wave transmission performance. Meanwhile, the electrically heated film material still forms a non-dense conductive network, which can generate current pathways under the influence of an electric field, thereby generating heat for anti-icing under the Joule heating effect. Thus, compatibility between electrically heated anti-icing and electromagnetic wave transmission is achieved.

[0048] This invention also provides a method for preparing the electrically heated anti-icing film described in the above technical solution, comprising the following steps:

[0049] Nano-conductive particles, polymers, and solvents are mixed to obtain a film material dispersion;

[0050] The membrane material dispersion was deposited on a micron-sized fiber bundle mesh to obtain the electrically heated anti-icing membrane (e.g. Figure 9 As shown, 5 is a polymer, 6 is nano-conductive particles, 7 is a solvent, 8 is a micron-sized fiber bundle mesh, and 9 is an electrically heated anti-icing film.

[0051] In this invention, unless otherwise specified, all raw materials used in the preparation are commercially available products well known to those skilled in the art.

[0052] This invention mixes nano-conductive particles, polymers, and solvents to obtain a membrane material dispersion.

[0053] In this invention, the solvent preferably includes an organic solvent and / or an inorganic solvent; the organic solvent includes one or more of toluene, xylene, ethanol, acetone and ethyl acetate; the inorganic solvent is preferably deionized water; when the solvent is two or more of the above-mentioned specific selections, this invention does not impose any special limitation on the ratio of the above-mentioned specific substances, and they can be mixed in any ratio.

[0054] In this invention, the weight ratio of the polymer, the conductive nanoparticles and the solvent is preferably 1:(0.025-0.25):(5-20), more preferably 1:(0.05-0.2):(8-16), and most preferably 1:(0.1-0.15):(10-13).

[0055] In the present application, the mixing method preferably comprises stirring and / or ultrasonic dispersion, and when the mixing method comprises stirring and ultrasonic dispersion, the mixing process preferably comprises stirring and ultrasonic dispersion in sequence. The present application does not have any special limitation on the conditions of the stirring and ultrasonic dispersion, and the conditions known to those skilled in the art can be used as long as uniform dispersion is ensured.

[0056] After obtaining the film material dispersion, the present application deposits the film material dispersion on the micron-level fiber mesh to obtain the electric heating de-icing film.

[0057] In the present application, the deposition method is preferably spraying or dipping, and the present application does not have any special limitation on the process of the spraying or dipping, and the process known to those skilled in the art can be used as long as the mesh wave-transparent pore of the micron-level fiber mesh is not blocked.

[0058] After the deposition is completed, the present application also preferably comprises curing, and the present application does not have any special limitation on the process of the curing, and the process known to those skilled in the art can be used as long as uniform dispersion is ensured.

[0059] The present application also provides the application of the electric heating de-icing film prepared by the above-mentioned technical solution or the above-mentioned preparation method to the windward surface of a stealth aircraft or a radar cover. The present application does not have any special limitation on the method of the application, and the method known to those skilled in the art can be used as long as uniform dispersion is ensured.

[0060] The electric heating de-icing film, the preparation method and the application thereof provided by the present application will be described in detail below in combination with examples, but they should not be understood as limitations on the protection scope of the present application.

[0061] Example 1

[0062] The fiber mesh with a square structure as shown in Figure 1 The fiber mesh with a square structure as shown in

[0063] According to a mass ratio of 0.1:1:5, the nanographite powder, the silicone rubber and the dimethylbenzene were mixed, mechanically stirred for 5 min, and ultrasonically dispersed for 10 min to obtain a conductive dispersion;

[0064] Using a spray gun, 15 g of the conductive dispersion was sprayed on the fiber mesh, and the room temperature was cured for 2 h to obtain an electric heating de-icing film with macro-micro-nano three-level wave-transparent pore structure;

[0065] For the convenience of resistance measurement, before spraying the conductive dispersion liquid, a 1 mm wide copper foil tape can be pasted on both sides of the electric heating deicing film as electrodes, and after spraying is completed, the overall resistance (i.e. equivalent square resistance) of the electric heating deicing film is tested by using the resistance scale of the multimeter.

[0066] The test results are: the electric conductivity of the electric heating deicing film is 50 S / m, the overall resistance (i.e. equivalent square resistance) is 1200 ohms, and the heating area empty ratio is 44%; at this time, the S21 parameter in the 0.3-18 GHz frequency interval is -1.12 to -1.03 dB, that is, the wave permeability is about 77% to 79% (as shown in Figure 5 , and under the condition of applying the commonly recorded 270V direct current, the heating power density of 2.7kW / m 2 can be met.

[0067] Example 2

[0068] The fiber mesh cloth with a rhombus structure as shown in Figure 2 is selected, the rhombus side length l2 is 4 mm, and the distance between the centers of adjacent two rhombuses is 5 mm (i.e. the rhombus edge distance l1 is 1 mm); the fiber mesh cloth is woven from a bundle of 40 single polyester fibers with a diameter of 5 μm without twisting; the thickness of the fiber mesh cloth is 0.15 mm, and the overall size is 100 mm*100 mm;

[0069] According to the mass ratio of 0.05:1:6, carbon nanotubes, polyurethane and dimethylbenzene are mixed, mechanically stirred for 5 min, and ultrasonically dispersed for 10 min to obtain a conductive dispersion liquid;

[0070] Using a spray gun, 8g of the conductive dispersion liquid is sprayed on the fiber mesh cloth, and room temperature curing is carried out for 2h to obtain an electric heating deicing film with macro-micro-nano three-level wave-transparent pore structure;

[0071] For the convenience of resistance measurement, before spraying the conductive dispersion liquid, a 1 mm wide copper foil tape can be pasted on both sides of the electric heating deicing film as electrodes, and after spraying is completed, the overall resistance (i.e. equivalent square resistance) of the electric heating deicing film is tested by using the resistance scale of the multimeter.

[0072] The test results are: the electric conductivity of the electric heating deicing film is 30 S / m, the overall resistance (i.e. equivalent square resistance) is 1800 ohms, and the heating area empty ratio is 36%; at this time, the S21 parameter in the 0.3-18 GHz frequency interval is -0.85 to -0.74 dB, that is, the wave permeability is more than 80% (as shown in Figure 6 , and under the condition of applying the commonly recorded 270V direct current, the heating power density of 4kW / m 2 can be met.

[0073] Example 3

[0074] Choose such Figure 3 The circular fiber mesh fabric shown has a diameter l2 of 4 mm and a center-to-center distance of 5 mm between two adjacent circles (i.e., an edge-to-edge distance l1 of 1 mm). The fiber mesh fabric is woven from a bundle of 60 twisted cotton fibers with a single diameter of 8 μm. The fiber mesh fabric has a thickness of 0.3 mm and an overall size of 100 mm * 100 mm.

[0075] Carbon nanotubes, graphene, thermoplastic elastomer and xylene were mixed in a mass ratio of 0.02:0.01:1:6, mechanically stirred for 5 min and then ultrasonically dispersed for 10 min to obtain a conductive dispersion.

[0076] Using a spray gun, 12g of the conductive dispersion was sprayed onto the fiber mesh cloth and cured at room temperature for 2 hours to obtain an electrically heated anti-icing film with a macro-micro-nano three-level wave-transparent pore structure.

[0077] To facilitate resistance measurement, before spraying the conductive dispersion, a 1mm wide copper foil tape can be pasted parallel to each of the left and right sides of the electric heating anti-icing film as electrodes. After spraying, the overall resistance (i.e., equivalent sheet resistance) of the electric heating anti-icing film can be tested using the resistance setting of a multimeter.

[0078] The test results are as follows: the conductivity of the electrically heated anti-icing film is 24 S / m, the overall resistance (i.e., equivalent sheet resistance) is 1500 ohms, and the open area of ​​the heated region is 50%; at this time, the S21 parameter is -1.25 to -1.16 dB in the frequency range of 0.3 to 18 GHz, that is, the transmittance is above 75% (e.g., Figure 7 As shown in the figure, when a commonly used 270V DC power is applied, it can achieve 4.86kW / m. 2 The heating power density.

[0079] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An electrically heatable deicing film, characterized in that The micro-fiber bundle mesh cloth and the polymer doped with nano-conductive particles; the polymer comprises an electromagnetic wave-transparent polymer; The polymer doped with nano-conductive particles is distributed on the surface of the mesh structure and the surface of the wave-transparent pore structure of the micro-fiber bundle mesh cloth; The wave-transparent pore structure of the electric heating anti-icing film comprises macro wave-transparent pore structure and micro wave-transparent pore structure; The pore diameter of the macro wave-transparent pore structure is millimeter pore diameter, and the pore diameter of the micro wave-transparent pore structure comprises micrometer pore diameter and nanometer pore diameter; The micro-fiber bundle mesh cloth is obtained by weaving after the fiber filaments are bundled; The macro wave-transparent pore structure is the mesh wave-transparent pore structure obtained after the polymer doped with nano-conductive particles is distributed on the surface of the mesh structure of the micro-fiber bundle mesh cloth; The micro wave-transparent pore structure is provided by the fiber filaments; The nanometer wave-transparent pore structure is the nanometer gap existing in the network structure formed by self-assembly of the nano-conductive particles; The medium in the wave-transparent pores in the millimeter wave-transparent pore structure, the micrometer wave-transparent pore structure and the nanometer wave-transparent pore structure is air, fiber filaments and polymer in sequence; The particle size of the nano-conductive particles is 1-100 nm.

2. The electrically-heated deicing film of claim 1, wherein, The size of the macro wave-transparent pore structure and the micro wave-transparent pore structure is stepless regulation.

3. The electrically-heated deicing film of claim 1, wherein, The mass ratio of the micro-fiber bundle mesh cloth and the polymer doped with nano-conductive particles is 1:(0.1-5).

4. The electrically-heated deicing film of claim 1, wherein, The diameter of the fiber filaments is 1-20 μm.

5. The electrically-heated deicing film of claim 4, wherein, The material of the fiber filaments comprises one or more of cotton fiber, bamboo fiber, wool fiber, silk fiber, glass fiber, polyester fiber, polyamide fiber and polyacrylonitrile fiber.

6. The electrically heatable deicing film of claims 1 or 3, wherein, The nano-conductive particles comprise one or more of carbon material, conductive metal material and conductive polymer.

7. The electrically heatable deicing film of claims 1 or 3, wherein, The electromagnetic wave-transparent polymer comprises one or more of polyurethane, silicone rubber and thermoplastic elastomer.

8. A method of making an electrically heatable deicing film according to any one of claims 1 to 7, characterized in that The method comprises the following steps: Mixing the nano-conductive particles, the polymer and the solvent to obtain a film material dispersion; Depositing the film material dispersion on the micro-fiber bundle mesh cloth to obtain the electric heating anti-icing film.

9. The electric heating anti-icing film of any one of claims 1-7 or the electric heating anti-icing film prepared by the preparation method of claim 8 is applied to the windward surface of a stealth aircraft or a radar cover.

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