Invisible coating material and invisible device

Abstract

The invention provides a stealth coating material and a stealth device, and relates to the technical field of functional materials, the stealth coating material is composed of organic cations, metal ions and anions; at least one of the metal ions and the organic cations has magnetism, the anions have coordination ability to the metal ions, and the valence state of the anions is changed under electrical stimulation. After the stealth coating material provided by the invention is put into use, the stealth capability of the stealth coating material can be easily adjusted. After the stealth device prepared from the stealth coating material provided by the invention is put into use, the stealth capability of the stealth device can be easily adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of functional materials, and in particular to a stealth coating material and a stealth device. Background Art

[0002] Coating stealth camouflage technology refers to the technology of coating a target object with a uniform and continuous functional film, so that the target object has the function of absorbing radar waves and reducing the reflectivity of radar waves. In order to give the target object the ability to be stealth, the stealth camouflage coating used must have a strong absorption capacity for electromagnetic waves. Therefore, stealth camouflage coating materials can generally be divided into the following types: (1) Electric loss type absorbers, which absorb electromagnetic waves by interacting with the electric field. The more classic electric loss type absorbers include graphite, acetylene carbon black, silicon carbide, conductive polymers, retinyl Schiff bases, etc. (2) Magnetic loss type absorbers, which convert magnetic energy into heat energy during the alternating magnetization process and then absorb electromagnetic waves. The more classic magnetic loss type absorbers include ferrite crystals such as nickel-zinc and lithium-zinc, magnetic metal powders such as carbonyl iron and carbonyl nickel, polycrystalline iron fibers, etc.; (3) Chiral absorbers, etc.

[0003] However, once deployed, stealth coatings are difficult to adjust and adapt to rapidly changing circumstances. Specifically, once a piece of equipment coated with stealth coatings begins performing a mission, it's difficult to switch from stealth to non-stealth, hindering the execution of complex missions. Summary of the Invention

[0004] The problem solved by the present invention is that once a stealth coating material is put into use, it is difficult to adjust its stealth capability.

[0005] To solve the above problems, the present invention provides a stealth coating material composed of organic cations, metal ions and anions; at least one of the metal ions and the organic cations is magnetic, the anions have coordination ability with the metal ions, and under electrical stimulation, the valence state of the anions changes.

[0006] Optionally, the metal ions are magnetic, and the metal ions include at least one of iron ions, cobalt ions, nickel ions, manganese ions, gadolinium ions, and neodymium ions.

[0007] Optionally, the anion includes at least one of fluoride ion, chloride ion, bromide ion and iodide ion.

[0008] Optionally, the organic cation comprises at least one of an ammonium cation, an imidazole cation and derivatives thereof, a quinoline cation and derivatives thereof, an isoquinoline cation and derivatives thereof, a benzothiazole cation and derivatives thereof, a pyrazine cation and derivatives thereof, an imine cation and derivatives thereof, and a 2,2,6,6-tetramethylpiperidinooxyl cation and derivatives thereof.

[0009] The present application also provides a stealth device comprising the stealth coating material, the electrolyte and the counter electrode substance as described above.

[0010] Optionally, the molar ratio of the organic cation, the metal ion, the anion, the electrolyte and the counter electrode substance is 1:1:4:(1-10):(1-5).

[0011] Optionally, the electrolyte comprises at least one of lithium perchlorate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium perchlorate, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium perchlorate, 1-hexyl-3-methylimidazolium hexafluorophosphate, 1-hexyl-3-methylimidazolium tetrafluoroborate, 1-hexadecyl-3-methylimidazolium hexafluorophosphate and tetrabutylammonium hexafluorophosphate.

[0012] Optionally, the counter electrode substance comprises at least one of a viologen, a p-benzoquinone and derivatives thereof, and a 2,2,6,6-tetramethylpiperidin-1-oxyl radical.

[0013] Optionally, the stealth device further comprises an auxiliary agent, which is a dye-switching molecule taking fluoran, oxazoline or phenol as a parent, and the color of the auxiliary agent changes under electrical stimulation.

[0014] Optionally, the structural formula of the auxiliary agent is selected from the group consisting of Formula I to Formula XV:

[0015]

[0016]

[0017]

[0018] ; In Formula I to Formula XV, R1 to R 10Any one independently selected from the group consisting of hydrogen, hydroxyl, amino, C1 to C24 alkyl, C1 to C24 substituted alkyl, C1 to C24 alkoxy, C1 to C24 alkylamino, C6 to C24 aryl and C7 to C24 intergroup containing both aromatic ring and alkane; X is O or N; Y is selected from one of O, S and dimethylsilyl; Z1 is selected from one of polyethylene, methacrylate and polyvinyl alcohol; Ar is pyridyl or phenyl.

[0019] Compared with the related art, the application is composed of organic cations, metal ions and anions, wherein at least one of the metal ions and the organic cations has magnetism, and the anions have coordination ability to the metal ions. Under electric stimulation, the valence state of the anions changes, thereby causing the magnetism of the stealth coating material to change, so that the stealth ability of the stealth coating material can be changed by electric stimulation. Specifically, when not subjected to electric stimulation, the magnetism caused by free radicals in the organic cations or the metal ions in the stealth coating material causes radar waves to be absorbed and energy conversion to occur, so that the signal of the target object disappears. After being subjected to electric stimulation, the anions in the stealth coating material are electrochemically oxidized, causing the metal ions coordinated therewith to be released, thereby causing the dielectric constant and the magnetism of the stealth coating material to change, and finally realizing the adjustment of the radar wave absorption ability of the stealth coating material, so as to change the stealth ability of the stealth coating material. By utilizing the adjustable magnetism of the stealth coating material, the target object coated with the material can switch the stealth state according to actual needs, thereby better achieving the purpose of deceiving radars. In summary, the stealth coating material provided by the application can easily adjust its stealth ability after being put into use. The stealth device made of the stealth coating material provided by the application can also easily adjust its stealth ability after being put into use. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is one of the structural schematic diagrams of the stealth device in the implementation of the application; Figure 2 is one of the preparation flowcharts of the stealth device in the implementation of the application; Figure 3 is the second structural schematic diagram of the stealth device in the implementation of the application; Figure 4 is the magnetic field intensity diagram of the stealth device prepared in Example 1 in different states; Figure 5 is the cycle performance test diagram of the stealth device prepared in Example 1; Figure 6 is the magnetic field intensity diagram of the stealth device prepared in Example 2 in different states; Figure 7 is the cycle performance test diagram of the stealth device prepared in Example 2; Figure 8 Visible light spectrum of the invisibility device prepared in Example 2 in different states.

[0021] BRIEF DESCRIPTION OF DRAWINGS 1, transparent electrode; 2, thermosetting glue; 3, first electrode; 4, second electrode. DETAILED DESCRIPTION

[0022] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be interpreted as being limited to the embodiments described herein, on the contrary, these embodiments are provided to make the present application more thorough and complete. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes, and are not intended to limit the scope of protection of the present application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0024] The term "comprising" and variations thereof as used herein are open-ended, that is "including, but not limited to"; the term "based on" is "based, at least in part, on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Related definitions are given throughout the detailed description. It should be noted that the concepts "first", "second", etc. mentioned in the present application are used to distinguish different objects, and are not used to describe a specific order or primary and secondary relationship. In addition, the terms "first", "second" are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0025] In view of the problems of the above-mentioned related technologies, the present application provides an invisibility coating material, which is composed of organic cations, metal ions and anions; at least one of the metal ions and the organic cations has magnetism, the anions have coordination ability to the metal ions, and the valence state of the anions changes under electric stimulation.

[0026] In one embodiment of the present invention, an adaptive stealth coating material is composed of organic cations, metal ions, and anions. At least one of the metal ions and the organic cations is magnetic, and the anions have coordination properties for the metal ions. Under electrical stimulation, the valence of the anions changes, thereby altering the magnetism of the stealth coating material. Thus, the electrical stimulation can be used to alter the stealth coating material's stealth capabilities. Specifically, when not subjected to electrical stimulation, the magnetism generated by the free radicals in the organic cations or metal ions in the stealth coating material absorbs radar waves and converts them into energy, causing the target object's signal to disappear. Upon electrical stimulation, the anions in the stealth coating material undergo electrochemical oxidation, releasing the metal ions that coordinate with them. This in turn changes the dielectric constant and magnetism of the stealth coating material, ultimately adjusting the stealth coating material's radar absorption capacity and thus changing its stealth capabilities. Leveraging the adjustable magnetic properties of the stealth coating material, a target object coated with the material can switch its stealth state according to actual needs, thereby better achieving radar deception. In summary, the stealth coating material provided by the embodiment of the present invention can easily adjust its stealth capability after being put into use. The stealth device made using the stealth coating material provided by the embodiment of the present invention can also easily adjust its stealth capability after being put into use.

[0027] In some embodiments of the present invention, the metal ions are magnetic. Exemplarily, the metal ions include at least one of iron ions, cobalt ions, nickel ions, manganese ions, gadolinium ions, and neodymium ions.

[0028] In some embodiments of the present invention, the anions include, for example, at least one of fluoride, chloride, bromide, and iodide. These anions are all electrochemically active, and their coordination abilities with metal ions differ before and after electrical stimulation. When no current is applied, the metal center coordinates with the anions. However, when current is applied, the anions are electrochemically oxidized, disrupting their coordination with the metal ion center, thereby changing the magnetic properties of the stealth coating material.

[0029] In some embodiments of the present invention, the organic cation includes at least one of ammonium ion, imidazolium cation and its derivatives, quinolinium cation and its derivatives, isoquinolinium cation and its derivatives, benzothiazolium cation and its derivatives, pyrazine cation and its derivatives, imine cation and its derivatives, and 2,2,6,6-tetramethylpiperidinium oxide cation and its derivatives.

[0030] The present invention also provides a stealth device, comprising the stealth coating material, an electrolyte and a counter electrode material as described above.

[0031] The stealth device made of the stealth coating material provided by the embodiment of the present invention, after being put into use, changes the valence state of the anions in the stealth coating material under electrical stimulation, thereby causing the magnetic properties of the stealth coating material to change. Therefore, the stealth capability of the stealth device can be easily changed by electrical stimulation. In some embodiments of the present invention, the molar ratio of the organic cation, the metal ion, the anion, the electrolyte, and the counter electrode material is 1:1:4:(1 to 10):(1 to 5).

[0032] In some embodiments of the present invention, the electrolyte includes at least one of lithium perchlorate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylperchlorate, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium perchlorate, 1-hexyl-3-methylimidazolium hexafluorophosphate, 1-hexyl-3-methylimidazolium tetrafluoroborate, 1-hexadecyl-3-methylimidazolium hexafluorophosphate and tetrabutylammonium hexafluorophosphate.

[0033] In some embodiments of the present invention, the counter electrode material includes at least one of viologens, p-benzoquinone and its derivatives, and 2,2,6,6-tetramethylpiperidin-1-oxyl free radical.

[0034] In some embodiments of the present invention, the stealth device further comprises an auxiliary agent, wherein the auxiliary agent is a dye switch molecule based on fluoran, oxazoline or phenylpeptide. Specifically, the structural formula of the auxiliary agent is selected from Formula I to Formula XV:

[0035]

[0036]

[0037]

[0038] ; In Formulas I to XV, R1 to R 10Each of the following groups is independently selected from any one of hydrogen, hydroxyl, amino, C1-C24 alkyl, C1-C24 substituted alkyl, C1-C24 alkoxy, C1-C24 alkylamino, C6-C24 aryl, and a C7-C24 group containing both an aromatic ring and an alkane; X is O or N; Y is selected from one of O, S, and dimethylsilyl; Z1 is selected from one of polyethylene, methacrylate, and polyvinyl alcohol; and Ar is pyridyl or phenyl. The auxiliary agents provided in this embodiment all have lactone or lactam groups, which are electron-rich. When complexed with metal ions, electrons are transferred to the metal ions, opening the lactone or lactam bond. The chromophore (the two lower benzene rings in the molecular structure) forms a conjugated system, causing the stealth coating material's signal in the visible light region to change, thereby changing the stealth device's signal in the visible light region. Therefore, the stealth device provided in this embodiment can simultaneously control the absorption capacity of both radar and visible bands.

[0039] An embodiment of the present invention further provides a method for preparing the stealth device as described above, comprising: Step S1, mixing the stealth coating material, electrolyte, counter electrode material and solvent as described above to prepare a stealth solution; Step S2: injecting the smart stealth solution into the empty groove formed by the transparent electrode or the semi-transparent electrode to obtain a stealth device.

[0040] For example, taking the case where the stealth coating material is composed of chloride ions, iron ions, and ammonium ions as an example, the preparation of a stealth device includes the following steps: The ITO glass was cut into small pieces of 3 cm × 3 cm, and then placed in a mixed immersion solution, left to stand for 30 minutes, ultrasonically cleaned with deionized water three times, each time for 15 minutes, and finally rinsed with isopropyl alcohol and dried with a dry nitrogen stream to obtain a transparent electrode; wherein the mixed immersion solution consists of hydrogen peroxide and ammonia water in a volume ratio of 1:3; Two transparent electrodes 1 are placed opposite to each other and sealed in the middle with fishing line and thermosetting glue 2 to obtain an empty groove; wherein the structure of the empty groove is as follows Figure 1 As shown; Adding a metal salt (for providing metal ions and some anions) and a halogen-containing organic salt (for providing some anions and organic cations) into a container to obtain a stealth coating material; After mixing the stealth coating material, electrolyte and counter electrode material, adding a solvent and dissolving them by ultrasonication to obtain a stealth solution; The stealth solution is injected into the empty slot to obtain a stealth device.

[0041] An embodiment of the present invention further provides another method for preparing the stealth device as described above, comprising: Step T1: mixing the stealth coating material, electrolyte, counter electrode material and solvent as described above to prepare a stealth solution; Step T2, adding a polymer, a plasticizer and an additive to the stealth solution to obtain a stealth gel; Step T3: Figure 2 As shown, the stealth gel is coated on the first electrode to obtain the first electrode with stealth gel, and then the second electrode is attached to the surface of the first electrode with stealth gel to obtain a stealth device, as shown in FIG. Figure 3 As shown; wherein, the first electrode 3 and the second electrode 4 are transparent electrodes or semi-transparent electrodes. It should be noted that, Figure 2 In FIG. 1 , A represents the first electrode, B represents the first electrode with the stealth gel attached, and C represents the stealth device.

[0042] like Figure 3 As shown, the stealth device prepared in this embodiment is a thin film device and can be attached to other types of electrodes (such as thin film electrodes, flexible electrodes, etc.).

[0043] In some embodiments of the present invention, the polymer comprises at least one of polymethyl methacrylate, polybutyl methacrylate, polystyrene, polycarbonate, polystyrene, polypropylene, styrene-methyl methacrylate copolymer, polyethylene glycol, polyethylene and polyaniline. In some embodiments of the present invention, the plasticizer includes at least one of dibutyl phthalate, dioctyl phthalate, epoxy soybean oil, tricresyl phosphate, triphenyl phosphate, dioctyl sebacate and chlorinated paraffin; the plasticizer can improve the plasticity of the film.

[0044] In some embodiments of the present invention, the additive is nanoparticles having a diameter of 8 μm to 50 μm. The additive can prevent the prepared stealth film from collapsing.

[0045] In some embodiments of the present invention, the first electrode and the second electrode include at least one of ITO glass, PET-ITO film, and FTO glass.

[0046] For example, taking the case where the stealth coating material is composed of chloride ions, iron ions, and ammonium ions as an example, the preparation of a stealth device includes the following steps: The ITO glass was cut into small pieces of 3 cm × 3 cm, and then placed in a mixture, allowed to stand for 30 minutes, ultrasonically cleaned with deionized water three times, each time for 15 minutes, and finally rinsed with isopropyl alcohol and dried with a stream of dry nitrogen to obtain a transparent electrode; wherein the mixture consists of hydrogen peroxide and ammonia water in a volume ratio of 1:3; Adding a metal salt (for providing metal ions and some anions) and a halogen-containing organic salt (for providing some anions and organic cations) into a container to obtain a stealth coating material; After mixing the stealth coating material, electrolyte and counter electrode material, adding a solvent and dissolving them by ultrasonication to obtain a stealth solution; Adding polymer, plasticizer and nanoparticles to the stealth solution to obtain stealth gel; The stealth gel is coated on the first electrode using a wire rod, and then the second electrode is bonded to the first electrode coated with the stealth gel to obtain a stealth device; the structure of the stealth device is as follows Figure 3 As shown; the first electrode and the second electrode are both transparent electrodes.

[0047] An embodiment of the present invention further provides another method for preparing the stealth device as described above, comprising: Step M1: Mix the stealth coating material, electrolyte, counter electrode material and solvent to prepare a stealth solution; Step M2: Add a polymer, a plasticizer, an additive, and an adjuvant to the stealth solution to obtain a stealth gel; the adjuvant is a dye switch molecule based on fluorane, oxazoline, or phenylpeptide, and the color of the adjuvant changes under electrical stimulation; illustratively, the structural formula of the adjuvant is selected from Formula I to Formula XV as described above. Step M3: coating the stealth gel on the first electrode to obtain the first electrode with the stealth gel, and then attaching the second electrode to the surface of the first electrode with the stealth gel to obtain a stealth device, wherein the first electrode and the second electrode are transparent electrodes or semi-transparent electrodes.

[0048] In this embodiment, since an auxiliary agent is added to the stealth device, the stealth device can adjust the color change of the material while regulating the magnetism, so that the absorption spectrum of the stealth device in the visible region changes, which is beneficial to the simultaneous adjustment of the infrared region and the visible region by the stealth device.

[0049] In some embodiments of the present invention, the plasticizer includes at least one of dibutyl phthalate, dioctyl phthalate, epoxy soybean oil, tricresyl phosphate, triphenyl phosphate, dioctyl sebacate and chlorinated paraffin; the plasticizer can improve the plasticity of the film.

[0050] In some embodiments of the present invention, the additive is nanoparticles having a diameter of 8 μm to 50 μm. The additive can prevent the prepared stealth film from collapsing.

[0051] In some embodiments of the present invention, the first electrode and the second electrode include at least one of ITO glass, PET-ITO film, and FTO glass.

[0052] Exemplarily, the invisibility device is prepared in the case that the invisibility coating material is composed of chloride ions, iron ions and ammonium ions, including the following steps: The ITO glass is divided into small pieces of 3cm*3cm, and then the divided ITO glass is placed in a mixed solution for 30min, and then cleaned with deionized water for 3 times, 15min each time, and finally cleaned with isopropanol and dried with a dry nitrogen gas stream to obtain a transparent electrode; wherein the mixed solution is composed of hydrogen peroxide and ammonia water in a volume ratio of 1:3; Metal salt (for providing metal ions and part of anions) and halogen-containing organic salt (for providing part of anions and organic cations) are added to a container to obtain an invisibility coating material; The invisibility coating material, electrolyte and counter electrode material are mixed, and then a solvent is added and ultrasonically dissolved to obtain an invisibility solution; The invisibility solution is added with a polymer, a plasticizer, nanoparticles and an auxiliary agent to obtain an invisibility gel; The invisibility gel is coated on the first electrode by using a wire rod, and then the second electrode is attached to the first electrode coated with the invisibility gel to obtain an invisibility device; the first electrode and the second electrode are transparent electrodes.

[0053] The application is further described below in combination with specific examples.

[0054] Example 1 A1、The ITO glass is divided into small pieces of 3cm*3cm, and then the divided ITO glass is placed in a mixed solution for 30min, and then cleaned with deionized water for 3 times, 15min each time, and finally cleaned with isopropanol and dried with a dry nitrogen gas stream to obtain a transparent electrode; wherein the mixed solution is composed of hydrogen peroxide and ammonia water in a volume ratio of 1:3;

[0055] A2、Two transparent electrodes are placed opposite to each other, and the middle is sealed with a fishing line and a thermosetting adhesive to obtain an empty slot. A3、80mg of metal salt ferric chloride (FeCl3) and 190mg of halogen-containing organic salt tetrabutylammonium iodide (TBAI) are added to a container to obtain an invisibility coating material.

[0056] A4、The invisibility coating material obtained in step A3, 1930mg of electrolyte tetrabutylammonium hexafluorophosphate and 270mg of counter electrode material p-benzoquinone (p-BQ) are mixed, and then 10ml of solvent r-butyrolactone is added and ultrasonically dissolved to obtain an invisibility solution.

[0057] A5、The invisibility solution is injected into the empty slot to obtain an invisibility device.

[0058] In Example 1, when FeCl3 and TBAI coexist, I -with Fe 3+ Coordination occurs and forms the TBAFeI4 structure. Due to the magnetic nature of iron ions, TBAFeI4 has the ability to absorb radar waves. With the application of positive voltage, I - Oxidation occurs gradually to generate I 3- , while originally I - Bound Fe 3+ is gradually released, and the magnetic strength of the stealth coating material also changes, thereby achieving the adaptive adjustment process of the stealth capability. 3- Restored to I - , reconnect with Fe 3+ Coordination restores the magnetism of the stealth coating material.

[0059] The performance of the stealth device prepared in Example 1 was tested. Figure 4 and Figure 5 shown. Figure 4 The figure shows the magnetic field strength of the stealth device prepared in Example 1 under different conditions. The horizontal axis represents the type of material, and the vertical axis represents the magnetic field strength. Figure 5 This is a test chart of the cyclic performance of the stealth device prepared in Example 1. The horizontal axis represents the number of cycles, and the vertical axis represents the magnetic field strength. Figure 4 As shown in Figure 2, the stealth device can change the magnetic field at a voltage of 1.5V and restore the magnetic field strength at a voltage of -1V. Figure 5 As shown in the figure, the performance of the stealth device has not been significantly reduced after more than 20 cycles. This shows that the stealth device prepared in Example 1 has good magnetic field modulation capability and cycle stability, and its stealth capability can be easily adjusted by applying voltage. It should be noted that Figure 4 In the figure, the “initial state” series corresponds to no voltage applied to the stealth device, the “1.5V” series corresponds to no 1.5V voltage applied to the stealth device, and the “-1.0” series corresponds to no -1V voltage applied to the stealth device. Example 2 A1. Cut the ITO glass into small pieces of 3 cm × 3 cm. Then place the cut ITO glass in a mixed immersion solution, let it stand for 30 minutes, ultrasonically clean it with deionized water three times, each time for 15 minutes, and finally rinse it with isopropyl alcohol. Then, blow dry it with a stream of dry nitrogen to obtain a transparent electrode. The mixed immersion solution consists of hydrogen peroxide and ammonia water in a volume ratio of 1:3.

[0060] A2. Place two transparent electrodes opposite to each other and seal them in the middle with fishing line and thermosetting glue to obtain an empty groove. A3. Add 80 mg of the metal salt ferric chloride (FeCl3) and 190 mg of the halogen-containing organic salt tetrabutylammonium iodide (TBAI) into a container to obtain a stealth coating material.

[0061] A4. Mix the stealth coating material prepared in step A3, 28.3 mg of auxiliary agent thermal black (ODB-2), 1930 mg of electrolyte tetrabutylammonium hexafluorophosphate, and 270 mg of counter electrode material p-benzoquinone (p-BQ), add 10 ml of solvent r-butyrolactone, and dissolve by ultrasonication to obtain a stealth solution; Among them, the structural formula of the auxiliary agent thermal black (ODB-2) is as follows:

[0062] A5. Inject the stealth solution into the empty slot to obtain a stealth device.

[0063] The performance of the stealth device prepared in Example 2 was tested. Figures 6 to 8 shown. Figure 6 The figure shows the magnetic field strength of the stealth device prepared in Example 2 under different conditions. The horizontal axis represents the type of material, and the vertical axis represents the magnetic field strength. Figure 7 This is a test chart of the cyclic performance of the stealth device prepared in Example 2, where the horizontal axis represents the number of cycles and the vertical axis represents the magnetic field strength. Figure 6 As shown in Figure 2, the stealth device can change the magnetic field at a voltage of 1.5V and restore the magnetic field strength at a voltage of -1V. Figure 7 As shown in the figure, the performance of the stealth device has not been significantly reduced after more than 20 cycles. This shows that the stealth device prepared in Example 2 has good magnetic field modulation ability and cycle stability, and its stealth ability can be easily adjusted by applying voltage. It should be noted that Figure 6 In the figure, the “initial state” series corresponds to no voltage applied to the stealth device, the “1.5V” series corresponds to no 1.5V voltage applied to the stealth device, and the “-1.0” series corresponds to no -1V voltage applied to the stealth device. Figure 8 The following is a graph showing the visible light spectra of the stealth device prepared in Example 2 under different states. The horizontal axis Wavelength represents the wavelength in nm, and the vertical axis ΔAbs. represents the change in absorbance. Figure 8 As shown, the coloring voltage of the stealth device is 1.5V, the fading voltage is -1V, and the absorption value of the stealth device at a wavelength of 595nm changes by 0.6, indicating that the stealth device prepared in Example 2 has good optical modulation ability. The stealth device prepared in Example 2 has good optical and magnetic field modulation capabilities and cyclic stability. It should be noted that, Figure 8 Among them, the "unpowered" series corresponds to no voltage applied to the stealth device, the "positively charged" series corresponds to no 1.5V voltage applied to the stealth device, and the "negatively charged" series corresponds to no -1V voltage applied to the stealth device.

[0064] Example 3 The difference from Example 1 is that in step A3, the halogen-containing organic salt is 1-butyl-3-methylimidazolium iodide ([BMIM]I).

[0065] Testing showed that the stealth device produced in Example 3 experienced a magnetic field change at a voltage of 1.5 V and recovered its magnetic field strength at a voltage of -1 V. The stealth device showed no significant performance degradation after over 20 cycles, demonstrating that the intelligent stealth device produced in Example 3 has excellent magnetic field modulation capabilities and cyclic stability.

[0066] Example 4 The difference from Example 1 is that in step A3, the halogen-containing organic salt is N-benzylquinoline salt, and the amount used is 255 mg.

[0067] Testing showed that the stealth device produced in Example 4 experienced a magnetic field change at a voltage of 1.5 V and recovered its magnetic field strength at a voltage of -1 V. The stealth device showed no significant performance degradation after more than 13 cycles, demonstrating that the intelligent stealth device produced in Example 4 has excellent magnetic field modulation capabilities and cyclic stability.

[0068] Example 5 The difference from Example 1 is that Step A3 is: adding 160 mg of metal salt zinc trifluoromethanesulfonate and 255 mg of halogen-containing organic salt N-benzylquinoline salt into a container to obtain a stealth coating material.

[0069] Step A4 comprises mixing the stealth coating material prepared in step A3, 1420 mg of the electrolyte 1-butyl-3-methylimidazolium hexafluorophosphate, and 270 mg of the counter electrode material methoxybenzoquinone, adding 10 ml of the solvent r-butyrolactone, and dissolving the mixture by ultrasonication to obtain a stealth solution. Testing showed that the stealth device produced in Example 5 experienced a magnetic field change at a voltage of 1.5 V and recovered its magnetic field strength at a voltage of -1 V. The stealth device showed no significant performance degradation after over 45 cycles, demonstrating that the intelligent stealth device produced in Example 5 has excellent magnetic field modulation capabilities and cyclic stability.

[0070] Example 6 A1. Cut the ITO glass into small pieces of 3 cm × 3 cm. Then place the cut ITO glass in a mixed immersion solution, let it stand for 30 minutes, ultrasonically clean it with deionized water three times, each time for 15 minutes, and finally rinse it with isopropyl alcohol. Then, blow dry it with a stream of dry nitrogen to obtain a transparent electrode. The mixed immersion solution consists of hydrogen peroxide and ammonia water in a volume ratio of 1:3.

[0071] A2, 140 mg of metal salt ferric tribromide and 190 mg of halogen-containing organic salt tetrabutylammonium iodide (TBAI) were added into the container to obtain a stealth coating material.

[0072] A3, the stealth coating material prepared in step A2, 1930 mg of electrolyte tetrabutylammonium hexafluorophosphate and 490.8 mg of counter electrode substance chloranil (TC-BQ) were mixed, and then 5 ml of solvent r-butyrolactone, 2400 mg of polymethyl methacrylate and 30 mL of acetonitrile were added and ultrasonically dissolved to obtain a stealth solution.

[0073] A4, a wire rod with a height of 120 μm was used to coat the stealth solution on a transparent electrode by means of blade coating, and then another transparent electrode was attached to the electrode coated with the stealth solution to obtain a stealth device.

[0074] After testing, the stealth device prepared in Example 6 changed the magnetic field at a voltage of 2.0 V and restored the magnetic field strength at a voltage of -1.8 V. After more than 52 cycles, the performance of the stealth device did not show a significant decline, indicating that the smart stealth device prepared in Example 6 has good magnetic field modulation capacity and cycle stability.

[0075] Although the present application is disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications shall fall within the protection scope of the present application.

Claims

1. A stealth coating material, characterized in that: It is composed of organic cations, metal ions and anions; at least one of the metal ions and the organic cations is magnetic, the anions have coordination ability with the metal ions, and the valence state of the anions changes under electrical stimulation.

2. The stealth coating material according to claim 1, characterized in that: The metal ions have magnetism and include at least one of iron ions, cobalt ions, nickel ions, manganese ions, gadolinium ions, and neodymium ions.

3. The stealth coating material according to claim 1, characterized in that: The anion includes at least one of fluoride ion, chloride ion, bromide ion and iodide ion.

4. The stealth coating material according to claim 1, characterized in that: The organic cation includes at least one of ammonium ion, imidazolium cation and its derivatives, quinolinium cation and its derivatives, isoquinolinium cation and its derivatives, benzothiazolium cation and its derivatives, pyrazine cation and its derivatives, iminium cation and its derivatives, and 2,2,6,6-tetramethylpiperidinium oxide cation and its derivatives.

5. A stealth device, characterized in that: The method comprises the stealth coating material according to any one of claims 1 to 4, an electrolyte and a counter electrode material.

6. The stealth device according to claim 5, characterized in that: The molar ratio of the organic cation, the metal ion, the anion, the electrolyte and the counter electrode material is 1:1:4:(1 to 10):(1 to 5).

7. The stealth device according to claim 5, characterized in that: The electrolyte includes at least one of lithium perchlorate, 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylperchlorate, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium perchlorate, 1-hexyl-3-methylimidazolium hexafluorophosphate, 1-hexyl-3-methylimidazolium tetrafluoroborate, 1-hexadecyl-3-methylimidazolium hexafluorophosphate and tetrabutylammonium hexafluorophosphate.

8. The stealth device according to claim 5, characterized in that: The counter electrode material includes at least one of viologens, p-benzoquinone and its derivatives and 2,2,6,6-tetramethylpiperidin-1-oxyl free radicals.

9. The stealth device according to any one of claims 5 to 8, characterized in that: The invention also includes an auxiliary agent, which is a dye switch molecule with fluorane, oxazoline or phenylpeptide as a parent. Under electrical stimulation, the color of the auxiliary agent changes.

10. The stealth device according to claim 9, characterized in that: The structural formula of the adjuvant is selected from Formula I to Formula XV: ； In Formulas I to XV, R1 to R 10 Each of the following groups is independently selected from any one of hydrogen, hydroxyl, amino, C1 to C24 alkyl, C1 to C24 substituted alkyl, C1 to C24 alkoxy, C1 to C24 alkylamino, C6 to C24 aryl, and a C7 to C24 group containing both an aromatic ring and an alkane; X is O or N; Y is selected from one of O, S, and dimethylsilyl; Z1 is selected from one of polyethylene, methacrylate, and polyvinyl alcohol; and Ar is pyridyl or phenyl.

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