Method for preparing resin and nanocrystal compound, and paint composition prepared using same and visible only in long-wavelength infrared rays

Abstract

The present invention relates to a method for preparing a resin and nanocrystal compound, and a paint composition prepared using same and visible only in long-wavelength infrared rays, and, more specifically, to: a method for preparing a resin and nanocrystal compound, comprising mixing a transparent resin and manufacturing same into a light-absorbing device and the like through a process such as UV curing; and a special paint composition prepared using same, the composition comprising plasmon nanoparticles doped and dispersed so as to be unrecognizable in visible light range but visible in the long-wavelength infrared range.

Description

Method for producing a resin and nanocrystal compound and a paint composition visible only to long-wave infrared rays produced thereby

[0001] The present invention relates to a method for producing a resin and nanocrystal compound and a paint composition produced thereby that is visible only in the long-wave infrared region, and more particularly, to a method for producing a resin and nanocrystal compound by mixing it into a transparent resin and producing a light absorption element or the like through a process such as UV curing, and to a special paint composition produced thereby that includes plasmonic nanoparticles that are doped and dispersed so that they are not recognized in the visible light region but are visible in the long-wave infrared region.

[0002]

[0003] In contemporary art and design, efforts are continually being made to utilize wavelengths beyond the visible light spectrum to create novel visual and artistic effects. For example, these techniques offer unique experiences to viewers by expressing shapes and colors that are invisible to the naked eye but become distinct when observed with infrared cameras or sensors. These techniques are also used for security and counterfeiting prevention.

[0004] However, existing specialized coatings (e.g., materials that aim for broad-spectrum light absorption, such as Vantablack) primarily focus on the visible light region, and research and technology application on materials that selectively exhibit visibility only in the long-wavelength infrared region (approximately 7–14 μm) are still insufficient. In order to actually realize such long-wavelength infrared-specific coatings, a process must be secured to stably disperse nanoparticles with infrared absorption properties and easily apply them in liquid or solid form while maintaining transparency and property stability.

[0005] In addition, it has recently been reported that semiconductor nanocrystals such as plasmonic nanoparticles (e.g., ITO, WOx, etc.) can implement long-wavelength infrared extreme absorption through *localized surface plasmon resonance (LSPR)*. When this is combined with a transparent resin, it becomes possible to implement a highly functional compound that can selectively block or absorb a desired infrared wavelength band or impart visibility while relatively transmitting visible light.

[0006] The present invention, taking this into consideration, specifically proposes a method for producing a resin and nanocrystal compound, and at the same time, utilizes the compound thus produced as a paint composition, thereby providing a special material that is clearly identifiable only in long-wave infrared.

[0007]

[0008] The technical problem to be achieved by the present invention is to provide a method for manufacturing a resin and nanocrystal compound by mixing it into a transparent resin and manufacturing it into a light absorption element through a process such as UV curing, and a special paint composition including plasmonic nanoparticles doped and dispersed so that they are not recognized in the visible light region but are visible in the long-wave infrared region.

[0009] The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0010]

[0011] In order to achieve the above technical task, a step of uniformly mixing nanocrystal material and transparent resin at a ratio of 1:5 to 30; a step of removing air bubbles generated when mixing the nanocrystal material and transparent resin; And a step of curing the mixture from which the bubbles have been removed using a UV lamp, wherein the nanocrystal material has infrared absorption properties, and the transparent resin is characterized in that it is curable by UV, wherein the transparent resin is characterized in that it is at least one of an acrylic resin, a silicone resin, or an ABS resin, and wherein the transparency of the mixture is controlled by the mixing ratio of the nanocrystal material, and wherein the nanocrystal material is characterized in that it is at least one selected from the group consisting of indium tin oxide (Sn:In2O3), tungsten oxide (WOx), molybdenum oxide (MoOx), zinc oxide (ZnO), titanium oxide (TiO2), aluminum oxide (Al2O3), vanadium oxide (V2O3 / VO2), hafnium oxide (HfO2), cerium oxide (CeO2), copper sulfide (CuSx), silicon nitride (SiN), and titanium nitride (TiN), A method for producing a resin and nanocrystal compound can be provided, characterized in that the resin and nanocrystal compound are doped with one or more cations selected from the group consisting of tin (Sn), zirconium (Zr), cerium (Ce), cesium (Cs), aluminum (Al), gallium (Ga), indium (In), tungsten (W), and molybdenum (Mo), and are doped with one or more anions selected from the group consisting of fluorine (F), chlorine (Cl), bromine (Br), and elemental vacancy.

[0012] In one embodiment of the present invention, the curing step includes a photoinitiator activation step of exposing the mixture to UV light to transition to a higher energy state, and may include one or more post-processing processes among blade coating, spin coating, screen printing, and roll-to-roll printing.

[0013] In one embodiment of the present invention, after the photoinitiator activation step, a step may be included in which the activated photoinitiator interacts with a monomer molecule having a double bond to form a polymer structure.

[0014] In one embodiment of the present invention, a resin and nanocrystal compound manufactured by a method for manufacturing a resin and nanocrystal compound can be provided.

[0015] In order to achieve the above technical task, a nanocrystal material: transparent resin is uniformly mixed in a ratio of 1:5 to 30 and cured, wherein the nanocrystal material has infrared absorption properties, and the resin is characterized in that it is transparent and can be cured by UV, and the transparent resin is characterized in that it is at least one of an acrylic resin, a silicone resin, or an ABS resin, and the nanocrystal material includes at least one selected from the group consisting of indium tin oxide (Sn:In2O3), tungsten oxide (WOx), molybdenum oxide (MoOx), zinc oxide (ZnO), titanium oxide (TiO2), aluminum oxide (Al2O3), vanadium oxide (V2O3 / VO2), hafnium oxide (HfO2), cerium oxide (CeO2), copper sulfide (CuSx), silicon nitride (SiN), and titanium nitride (TiN), and the nanocrystal A light absorbing element can be provided, characterized in that the material is doped with one or more cations selected from the group consisting of tin (Sn), zirconium (Zr), cerium (Ce), cesium (Cs), aluminum (Al), gallium (Ga), indium (In), tungsten (W), and molybdenum (Mo), and one or more anions selected from the group consisting of fluorine (F), chlorine (Cl), bromine (Br), and elemental vacancy.

[0016] In order to achieve the above technical task, a paint composition manufactured by a method for manufacturing a resin and a nanocrystal compound, wherein the paint composition comprises: plasmonic nanoparticles doped with cationic particles or anionic particles; a dispersant; and a monomer capable of polymerizing an acrylic resin; wherein the monomer capable of polymerizing an acrylic resin is 0.01 wt% to 100 wt% of the paint composition visible only in the long-wave infrared, can be provided.

[0017] In order to achieve the above technical task, a paint composition manufactured by a method for manufacturing a resin and a nanocrystal compound, wherein the paint composition comprises: plasmonic nanoparticles doped with cationic particles or anionic particles; a dispersant; and water; wherein the water is 0.01 wt% to 100 wt% of the paint composition visible only to long-wave infrared rays, can be provided.

[0018] In one embodiment of the present invention, the plasmonic nanoparticles generate localized surface plasmon resonance (LSPR) to selectively absorb only infrared rays, and include at least one selected from the group consisting of indium oxide (In2O3), tungsten oxide (WOx), molybdenum oxide (MoOx), zinc oxide (ZnO), titanium oxide (TiO2), aluminum oxide (Al2O3), vanadium oxide (V2O3 / VO2), hafnium oxide (HfO2), cerium oxide (CeO2), copper sulfide (CuSx), silicon nitride (SiN), and titanium nitride (TiN), and include at least one selected from the group consisting of a sphere, a cube, a rounded cube, a polygonal particle, and an irregular particle, and may have an average diameter of 3 nm to 500 nm. there is.

[0019] In one embodiment of the present invention, the cationic particles include at least one selected from the group consisting of tin (Sn), zirconium (Zr), cerium (Ce), cesium (Cs), aluminum (Al), gallium (Ga), indium (In), tungsten (W), and molybdenum (Mo), and have an average diameter of 0.71 Å to 1.93 Å, and the anionic particles include at least one selected from the group consisting of fluorine (F), chlorine (Cl), and bromine (Br), and have an average diameter of 1.19 Å to 1.81 Å.

[0020] In one embodiment of the present invention, the plasmonic nanoparticles are characterized in that they are 0.01 wt% to 100 wt% of the paint composition visible only in the long-wavelength infrared, the cationic particles or the anionic particles are characterized in that they are 0.01 wt% to 15 wt% of the paint composition visible only in the long-wavelength infrared, the dispersant is characterized in that they are 0.01 wt% to 100 wt% of the paint composition visible only in the long-wavelength infrared, and the paint composition may have a transmittance of 80% or less in a wavelength range of 0.7 µm to 14 µm.

[0021] In one embodiment of the present invention, the dispersant may include at least one selected from the group consisting of hexane, toluene, benzene, chloroform, pentane, octane, and tetrachloroethylene.

[0022] In one embodiment of the present invention, the monomer capable of polymerizing the acrylic resin is selected from an acrylic monomer, a (meth)acrylic acid ester monomer, or a mixture thereof, and the acrylic monomer or the (meth)acrylic acid ester monomer may include at least one selected from the group consisting of acrylic acid, 2-ethylhexyl acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, hexyl (meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and isononyl (meth)acrylate.

[0023] In order to achieve the above technical task, it is possible to provide a picture drawn by a paint composition that is visible only in long-wave infrared.

[0024] In order to achieve the above technical task, a sculpture made by a paint composition visible only to long-wave infrared rays can be provided.

[0025]

[0026] According to an embodiment of the present invention, by uniformly mixing plasmonic nanoparticles into a transparent resin to secure visible light transmittance and at the same time exhibiting long-wave infrared absorption characteristics, a method for producing a resin and nanocrystal compound that is invisible to the naked eye but visible in the infrared region, and a paint composition produced thereby that is visible only in the long-wave infrared region, can be provided.

[0027] According to an embodiment of the present invention, since a liquid-state paint composition can be rapidly solidified by a simple method such as a UV curing process, a method for producing a resin and nanocrystal compound that can be used in various fields such as art works, security marking, and energy-saving optical devices can be provided, and a paint composition visible only to long-wave infrared rays produced thereby can be provided.

[0028] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the composition of the invention described in the claims.

[0029]

[0030] FIG. 1 is a flowchart showing a process for manufacturing a compound by mixing a resin and a nanocrystal material according to one embodiment of the present invention.

[0031] Figure 2 is a flowchart for explaining a curing step of a transparent resin according to one embodiment of the present invention.

[0032] Fig. 3a is an FTIR transmittance (%) analysis graph for a general UV resin, and Fig. 3b is an image showing an FTIR transmittance graph of a resin with ITO added according to one embodiment of the present invention.

[0033] FIG. 4a is an image of a resin and nanocrystal compound according to one embodiment of the present invention, taken with a visible light camera.

[0034] Figure 4b is an image of a resin and nanocrystal compound according to one embodiment of the present invention taken with an infrared camera.

[0035] FIGS. 5A and 5B are microscope images showing infrared absorbing indium tin oxide according to one embodiment of the present invention.

[0036] FIG. 6a is an image of a painting on canvas using a paint composition that is visible only to infrared rays according to one embodiment of the present invention, taken with a visible light camera.

[0037] FIG. 6b is an image of a painting on canvas taken with an infrared camera using a paint composition that is visible only to infrared rays according to one embodiment of the present invention.

[0038] FIG. 7a is an image of a painting on canvas using a paint composition that is visible only to infrared rays according to one embodiment of the present invention, taken with a visible light camera.

[0039] FIG. 7b is an image of a painting on canvas taken with an infrared camera using a paint composition that is visible only to infrared rays according to one embodiment of the present invention.

[0040]

[0041] Hereinafter, the present invention will be described with reference to the attached drawings. However, the present invention can be implemented in various different forms and is therefore not limited to the embodiments described herein. In the drawings, irrelevant parts have been omitted for clarity of description, and similar parts have been designated with similar reference numerals throughout the specification.

[0042] Throughout the specification, when a part is said to be "connected (connected, contacted, joined)" to another part, this includes not only cases where it is "directly connected," but also cases where it is "indirectly connected" with another part in between. Furthermore, when a part is said to "include" a component, this does not exclude other components, but rather implies that it may include other components, unless otherwise specifically stated.

[0043] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this specification, it should be understood that the terms “comprise” or “have” specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0044]

[0045] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0046]

[0047] FIG. 1 is a flowchart showing a process for manufacturing a compound by mixing a resin and a nanocrystal material according to one embodiment of the present invention.

[0048] Referring to FIG. 1, in an embodiment of the present invention, the process for manufacturing a resin and nanocrystal compound includes a step of uniformly mixing a nanocrystal material and a transparent resin at a ratio of 1:5 to 30 (S110), a step of removing air bubbles generated when mixing the nanocrystal material and the transparent resin (S120), and a step of curing the mixture from which the air bubbles have been removed using a UV lamp (S130).

[0049] At this time, the nanocrystal material must have infrared absorption properties, and the resin must be curable by UV.

[0050] In the step (S110) of mixing the nanocrystal material and the transparent resin, as the ratio of ITO in the mixture increases, mixing becomes difficult and a phenomenon of decreasing transparency may occur. Therefore, the mixing ratio of the nanocrystal material and the transparent resin is limited to the above range. In this way, in one embodiment of the present invention, the transparency of the compound is controlled by the mixing ratio of the nanocrystal material.

[0051] In the step of removing the above air bubbles (S120), after obtaining a uniformly mixed resin and nanocrystal compound, air bubbles are removed using a vacuum pump.

[0052] In the above-mentioned curing step (S130), the resin and nanocrystal compound from which bubbles have been removed are placed under a UV lamp and cured. The UV lamp hardens the polymer formed in the resin and converts it into a solid.

[0053] In one embodiment of the present invention, the nanocrystal material may be at least one selected from the group consisting of indium tin oxide (Sn:In2O3), tungsten oxide (WOx), molybdenum oxide (MoOx), zinc oxide (ZnO), titanium oxide (TiO2), aluminum oxide (Al2O3), vanadium oxide (V2O3 / VO2), hafnium oxide (HfO2), cerium oxide (CeO2), copper sulfide (CuSx), silicon nitride (SiN), and titanium nitride (TiN).

[0054] At this time, the nanocrystal material may include doping elements of cations and anions to form semiconductor-type plasmonic nanoparticles. The cations are at least one selected from the group consisting of tin (Sn), zirconium (Zr), cerium (Ce), cesium (Cs), aluminum (Al), gallium (Ga), indium (In), tungsten (W), and molybdenum (Mo), and the anions are mainly halogen anions, at least one selected from the group consisting of fluorine (F), chlorine (Cl), bromine (Br), and elemental vacancy.

[0055] In one embodiment of the present invention, the content of the doping element is limited to 15% or less of the nanocrystal material. This is because the nanocrystal material generates free electrons within the nanoparticle crystal lattice when composed of n-type doping tin (Sn) element at a weight ratio (x = 0 to 15%) of 15% or less, and the remainder ((100-x)%) can be utilized as a nanocrystal component without phase transformation. If the content of the doping element exceeds 15%, the nanocrystal material is defined as an alloy, and phase separation that does not form free electrons may occur, which may result in a deterioration in infrared absorption performance. That is, since the free electron concentration is reduced, the peak shift of the localized surface plasmon resonance (LSPR) may red shift to a long wavelength region, which may result in a decrease in performance, the content of the doping element in one embodiment of the present invention is limited to 15% or less.

[0056] In one embodiment of the present invention, a nanocrystal material is prepared, the nanocrystal material is manufactured into a colloidal solution, and nucleation and growth can be achieved using a nanoparticle synthesis technique. At this time, a doping element can be injected into the solution to synthesize nanocrystals. Thereafter, the synthesized nanoparticles can be separated and purified and dispersed in a polar solution or a non-polar solution to manufacture nanocrystals. More specifically, in one embodiment of the present invention, when the synthesized nanoparticles are synthesized in a fat-soluble solution, they can be dispersed in a non-polar solution, and the fat-soluble solution can be one or more selected from the group consisting of oleic acid, oleyl alcohol, octylamine, trioctylamine, and octadecene.

[0057] In addition, when dispersing in the polar solution, a step of surface-treating the nanoparticles using a Meerwein salt containing nitrosonium tetrafluoroborate or triethyloxonium tetrafluoroborate, or a basic aqueous solution containing sodium hydroxide (NaOH) or potassium hydroxide (KOH) may be included before dispersing in the polar solution.

[0058] In the above surface treatment step, the concentration of the mierbaine salt or basic aqueous solution may be 80 to 120 mg / ml.

[0059] And, in the step of dispersing in the polar solution, if the nanoparticles are in the form of strips of organic ligand, the nanoparticles can be dispersed in one or more polar solutions selected from the group including water, an aqueous solution, an alcoholic solution, dimethylformamide, acetonitrile, and a polymer.

[0060]

[0061] Meanwhile, in one embodiment of the present invention, the transparent resin may be at least one of an acrylic resin, a silicone resin, or an ABS resin, but is not limited thereto. The acrylic resin may be at least one of polymethyl methacrylate (PMMA), polyacrylonitrile (PAN), and polyacrylic acid (PAA).

[0062] Meanwhile, UV (ultraviolet) curing is a chemical reaction that occurs when certain types of compounds are exposed to UV light. This reaction is primarily used in conjunction with the formation of polymers, which can create strong and durable materials. In one embodiment of the present invention, UV curing is primarily performed using a UV lamp. Typically, the materials used are composed of small molecules called monomers. The ultraviolet rays generated by the UV lamp are used to change the molecular structure of the materials and bond them together. The chemical reaction that occurs during this process can be broadly divided into two stages.

[0063] FIG. 2 is a flowchart for explaining a curing step of a transparent resin according to one embodiment of the present invention, which will be described below with reference to FIG. 2.

[0064] In one embodiment of the present invention, the curing step (S130) includes a photoinitiator activation step (S131) ​​that exposes the mixture to UV light to transition to a higher energy state. In this step, ultraviolet rays generated from a UV lamp activate a chemical substance called photoinitiator, and the photoinitiator transitions to a higher energy state by exposure to UV light, and in this state, it becomes reactive enough to interact with other molecules. Next is the chain transfer and polymerization step (S132), in which the activated photoinitiator mainly interacts with monomer molecules having double bonds to close one of the double bonds. As this reaction is repeated, the monomers combine with each other to form dimers, trimers, or larger polymer structures. The polymer structures thus formed are cured and transformed into a hard form.

[0065] Additionally, the curing step may include one or more post-processing processes selected from the group consisting of blade coating, spin coating, screen printing, and roll-to-roll printing. These post-processing processes may be primarily used as a method for obtaining a compound having a uniform thickness.

[0066] In addition, the transparent resin may include one or more selected from the group consisting of a viscosity modifier, a hardener, a dispersant, and a stabilizer, and a mixture of these materials may be selected and used depending on the use of the compound being manufactured.

[0067] As described above, in one embodiment of the present invention, nanocrystal materials are added to transparent resins to impart diverse functionality and enhance the material's properties in various application fields. In particular, ITO boasts excellent transparency, allowing it to maintain overall transparency even when added to the resin. This is a crucial factor in optical devices and other fields requiring transparent functional materials. This could enable innovative applications in a variety of fields.

[0068]

[0069] Meanwhile, Fig. 3a is an FTIR transmittance (%) analysis graph for a general UV resin, and Fig. 3b is an FTIR transmittance graph of a resin with ITO added according to an embodiment of the present invention.

[0070] Comparing the FTIR Trancemittance (%) analysis graphs of a typical UV resin and a resin with added ITO in Figures 3a and 3b, it can be confirmed that the overall transmittance decreases in the graph of the resin with added ITO. This phenomenon appears to be due to infrared absorption of the ITO in the resin.

[0071] In addition, Fig. 4a is a photograph of a resin and a nanocrystal compound according to an embodiment of the present invention taken with a visible light camera, and Fig. 4b is a photograph of a resin and a nanocrystal compound according to an embodiment of the present invention taken with an infrared camera. Referring to Figs. 4a and 4b, the photographs taken with a normal camera confirm transparency, but in the photographs taken with an ultraviolet camera, it can be confirmed that only the two resins on the right side to which ITO was added appear black due to light absorption by the ITO in the resin.

[0072] In this way, when ITO was added to the UV resin and cured, it was possible to observe the absorbance through FTIR analysis. It was confirmed that the excellent electrical conductivity of ITO and the characteristics of the resin were combined through mixing the resin and ITO. This indicates that the unique physical properties of ITO are exhibited even when the resin and ITO are mixed. The infrared absorption properties of ITO and the transparency of the resin are effectively combined, and these properties can be applied to new fields of application. In other words, the compound of the transparent resin and nanocrystal according to one embodiment of the present invention can be evaluated as an important discovery for future technological development by providing new properties in a form in which the infrared absorption properties of the nanocrystals and the transparency of the resin are significantly exhibited. For example, it becomes possible to manufacture an infrared absorption device. More specifically, it may become possible to manufacture a light absorption device using a transparent sheet that can absorb desired infrared light in a specific wavelength band or a wide wavelength band.

[0073]

[0074] As another embodiment of the present invention, a paint composition visible only to long-wave infrared rays, manufactured by the method for manufacturing a resin and nanocrystal compound described above, will be described in detail below with reference to the attached drawings.

[0075]

[0076] A coating composition visible only to long-wave infrared rays according to one embodiment of the present invention comprises plasmonic nanoparticles doped with cationic particles or anionic particles, a dispersant, and a monomer capable of polymerizing an acrylic resin.

[0077] A coating composition visible only in the long-wave infrared according to one embodiment of the present invention utilizes the near-field and far-field spectroscopic characteristics of infrared localized surface plasmon resonance (LSPR) by including plasmonic nanoparticles, which are semiconductor n-type doped nanocrystals. This composition can induce infrared extreme absorption light-matter interaction through plasmonics, surpassing the visible light range of conventional organic / metallic materials.

[0078] In an embodiment of the present invention, the plasmonic nanoparticle may selectively absorb only infrared rays by generating localized surface plasmon resonance (LSPR).

[0079] In an embodiment of the present invention, the plasmonic nanoparticle may include at least one selected from the group consisting of indium oxide (In2O3), tungsten oxide (WOx), molybdenum oxide (MoOx), zinc oxide (ZnO), titanium oxide (TiO2), aluminum oxide (Al2O3), vanadium oxide (V2O3 / VO2), hafnium oxide (HfO2), cerium oxide (CeO2), copper sulfide (CuSx), silicon nitride (SiN), and titanium nitride (TiN).

[0080] In an embodiment of the present invention, the plasmonic nanoparticle may include at least one selected from the group consisting of a sphere, a cube, a rounded cube, a polygon particle, and an irregular particle.

[0081] The shape of the above plasmonic nanoparticle is thermodynamically stabilized into a spherical shape, but has the characteristic of being able to selectively absorb only infrared rays while consistently transmitting visible light regardless of the shape of the particle.

[0082] The shape of the above plasmonic nanoparticles can be analyzed using a scanning electron microscope (SEM) or transmission electron microscopy (TEM).

[0083] In an embodiment of the present invention, the plasmonic nanoparticles may have an average diameter of 3 nm to 500 nm; 3 nm to 300 nm; 3 nm to 100 nm; 3 nm to 50 nm; 3 nm to 10 nm; 10 nm to 500 nm; 10 nm to 300 nm; 10 nm to 100 nm; 10 nm to 50 nm; 30 nm to 500 nm; 30 nm to 300 nm; 30 nm to 100 nm; 30 nm to 50 nm; 50 nm to 500 nm; 50 nm to 300 nm; 50 nm to 100 nm; 100 nm to 500 nm; 100 nm to 300 nm; 300 nm to 500 nm; or 400 nm to 500 nm.

[0084] If the average diameter of the above plasmonic nanoparticles is less than 3 nm, a problem may arise in which plasmonic free electrons are not stably generated within the nanoparticles, and if it exceeds 500 nm, a problem may arise in which free electron resonance is impossible and the LSPR plasmon effect does not occur.

[0085] In an embodiment of the present invention, the plasmonic nanoparticles are present in an amount of 0.01 wt% to 100 wt%; 0.01 wt% to 90 wt%; 0.01 wt% to 80 wt%; 0.01 wt% to 50 wt%; 0.01 wt% to 30 wt%; 0.01 wt% to 10 wt%; 0.01 wt% to 1 wt%; 0.01 wt% to 0.1 wt%; 0.1 wt% to 100 wt%; 0.1 wt% to 90 wt%; 0.1 wt% to 80 wt%; 0.1 wt% to 50 wt%; 0.1 wt% to 30 wt%; 0.1 wt% to 10 wt%; 0.01 wt% to 1 wt%; 1 wt% to 100 wt%; 1 wt% to 90 wt%; 1 wt% to 80 wt%; 1 wt% to 50 wt%; 1 wt% to 30 wt%; 1 wt% to 10 wt%; 10 wt% to 100 wt%; 10 wt% to 90 wt%; 10 wt% to 80 wt%; 10 wt% to 50 wt%; 10 wt% to 30 wt%; 30 wt% to 100 wt%; 30 wt% to 90 wt%; 30 wt% to 80 wt%; 30 wt% to 50 wt%; 50 wt% to 100 wt%; 50 wt% to 90 wt%; 50 wt% to 80 wt%; 80 wt% to 100 wt%; 80 wt% to 90 wt%; or 90 wt% to 100 wt%; It could be.

[0086] If the above plasmonic nanoparticles are less than 0.01 wt% in the paint composition that is visible only in the long-wave infrared, a problem of non-absorption may occur, and up to 100 wt% of pure infrared-absorbing nanoparticle dispersion solids can be used as a color paint.

[0087] In an embodiment of the present invention, the cationic particles may include at least one selected from the group consisting of tin (Sn), zirconium (Zr), cerium (Ce), cesium (Cs), aluminum (Al), gallium (Ga), indium (In), tungsten (W), and molybdenum (Mo).

[0088] In an embodiment of the present invention, the anion particle may include at least one selected from the group consisting of fluorine (F), chlorine (Cl), and bromine (Br).

[0089] In an embodiment of the present invention, the cationic particles may have an average diameter of 0.71 Å to 1.93 Å; 0.71 Å to 1.80 Å; 0.71 Å to 1.5 Å; 0.71 Å to 1.0 Å; 0.80 Å to 1.93 Å; 0.8 Å to 1.5 Å; 0.80 Å to 1.0 Å; 1.0 Å to 1.93 Å; or 1.0 Å to 1.5 Å.

[0090] If the average diameter of the above-mentioned cationic particles is less than 0.71 Å, substitutional doping may not occur, and a phase separation problem may occur outside the particles. If it exceeds 1.93 Å, a problem may occur in which the metal oxide exceeds the size at which the metal is not substituted.

[0091] In an embodiment of the present invention, the anion particles may have an average diameter of 1.19 Å to 1.81 Å; 1.19 Å to 1.70 Å; 1.19 Å to 1.50 Å; 1.19 Å to 1.30 Å; 1.30 Å to 1.81 Å; 1.30 Å to 1.70 Å; 1.30 Å to 1.50 Å; 1.50 Å to 1.81 Å; or 1.50 Å to 1.70 Å.

[0092] If the average diameter of the above anion particles is less than 1.19 Å, a problem of non-existence in the periodic table of elements may occur, and if it exceeds 1.81 Å, a problem of exceeding the size that is not substitutable with oxygen in the metal oxide may occur.

[0093] In an embodiment of the present invention, the cationic particles or the anionic particles may be present in an amount of 0.01 wt% to 15 wt%; 0.01 wt% to 10 wt%; 0.01 wt% to 5 wt%; 0.01 wt% to 0.1 wt%; 0.1 wt% to 15 wt%; 0.1 wt% to 10 wt%; 0.1 wt% to 5 wt%; 1 wt% to 15 wt%; 1 wt% to 10 wt%; 1 wt% to 5 wt%; 5 wt% to 15 wt%; or 5 wt% to 1 wt% of the coating composition visible only to long-wave infrared rays.

[0094] The above nanoparticles: If the weight ratio of the cationic particles or the anionic particles is less than 0.01% in the paint composition visible only in the long-wave infrared, a problem of non-formation of free electrons may occur, and if it exceeds 15%, a problem of component phase separation rather than doping activity may occur.

[0095] The coating composition of the present invention, which is visible only in the long-wave infrared, comprises infrared-extremely absorbing semiconductor nanoparticles. In order to induce plasmons in the infrared spectral range, n-type dopants (SnInㆍ, FOㆍ, CeInㆍ, ZrInㆍ, WInㆍ) and oxygen-depletion doping (VO‥) are given priority in that order to generate free electrons on the In2O3 nanocrystal host bixbyite crystal phase. The material can be dispersed in powder form, polar (acrylic, water, alcohol, etc.) and non-polar (hexane, toluene, kerosene, oil, etc.) paints (0% to 99% < concentration, 100% (powder form)) to implement the paint.

[0096] Conventionally, red phosphorus smoke screens oversaturate infrared imaging cameras, hindering the recognition of smoke-shielding objects. The ultra-absorbing infrared nanocrystals of the present invention are bulk ITO 663.13 cm -1 Contrast plasmonic nanoparticle absorption is 50 x 104 cm -1 It can reach infrared extinction performance close to that of a .

[0097] Kroger-Vink notation is a set of rules used to describe the lattice locations and charges of point defect species in crystals. The superscript dot (ㆍ) represents a positive charge, and the subscript (') represents a negative charge of the crystal lattice. By chemically adjusting the concentration of charge point defect precursors through tin (Sn) or fluorine (F) doping, free electron carriers can be proportionally generated in nanocrystals. The free electrons confined in the nanostructure resonate with the external infrared electromagnetic wave electric field, resulting in the development of an extreme absorption effect. The free electrons developed as dopants are confined in the nanostructure space and can resonate within the nanocrystal through interaction with the external electromagnetic wave. The interaction between the electromagnetic wave and the material results in a strong absorption phenomenon, which is called the localized surface plasmon resonance (LSPR) effect. The strong absorption phenomenon due to LSPR can be expressed in a physical model by the permittivity (p), and the wavelength position of the resonance plasmon peak where absorption occurs is determined by the resonance frequency (ω). This resonance frequency is determined by the resonance frequency of the electrons confined in the nanocrystal. It is proportional to the free electron concentration (ne). That is, infrared region extreme absorption peak tuning is possible by designing the free electron concentration.

[0098] Plasmonic nanoparticles doped with cationic or anionic particles of the present invention can be analyzed for components and doping using Energy Dispersive Spectroscopy (EDS), Electron Energy Loss Spectroscopy (EELS), X-ray Photoelectron Spectroscopy (XPS), or Inductively Coupled Plasma Mass Spectrometry (ICP-MS).

[0099] In an embodiment of the present invention, the dispersant may include at least one selected from the group consisting of hexane, toluene, benzene, chloroform, pentane, octane, and tetrachloroethylene.

[0100] In an embodiment of the present invention, the dispersant is present in an amount of 0.01 wt% to 100 wt%; 0.01 wt% to 90 wt%; 0.01 wt% to 80 wt%; 0.01 wt% to 50 wt%; 0.01 wt% to 30 wt%; 0.01 wt% to 10 wt%; 0.01 wt% to 1 wt%; 0.01 wt% to 0.1 wt%; 0.1 wt% to 100 wt%; 0.1 wt% to 90 wt%; 0.1 wt% to 80 wt%; 0.1 wt% to 50 wt%; 0.1 wt% to 30 wt%; 0.1 wt% to 10 wt%; 0.1 wt% to 1 wt%; 1 wt% to 100 wt%; 1 wt% to 90 wt%; 1 wt% to 80 wt%; 1 wt% to 50 wt%; 1 wt% to 30 wt%; 1 wt% to 10 wt%; 10 wt% to 100 wt%; 10 wt% to 90 wt%; 10 wt% to 80 wt%; 10 wt% to 50 wt%; 10 wt% to 30 wt%; 30 wt% to 100 wt%; 30 wt% to 90 wt%; 30 wt% to 80 wt%; 30 wt% to 50 wt%; 50 wt% to 100 wt%; 50 wt% to 90 wt%; 50 wt% to 80 wt%; or 80 wt% to 100 wt%.

[0101] If the above dispersant is less than 0.01 wt% in the paint composition that is visible only to the long-wave infrared, a problem of non-absorption may occur, and up to 100 wt% of pure infrared-absorbing nanoparticle dispersion solids can be used as a color paint.

[0102] A paint composition visible only to long-wave infrared rays, comprising a monomer capable of polymerizing an acrylic resin of the present invention, can be used as an acrylic paint.

[0103] In an embodiment of the present invention, the monomer capable of polymerizing the acrylic resin may be selected from an acrylic monomer, a (meth)acrylic acid ester monomer, or a mixture thereof.

[0104] In an embodiment of the present invention, the acrylic monomer or (meth)acrylic acid ester monomer may include at least one selected from the group consisting of acrylic acid, 2-ethylhexyl acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, hexyl (meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and isononyl (meth)acrylate.

[0105] In an embodiment of the present invention, the acrylic resin polymerizable monomer is present in an amount of 0.01 wt% to 100 wt%; 0.01 wt% to 90 wt%; 0.01 wt% to 80 wt%; 0.01 wt% to 50 wt%; 0.01 wt% to 30 wt%; 0.01 wt% to 10 wt%; 0.01 wt% to 1 wt%; 0.01 wt% to 0.1 wt%; 0.1 wt% to 100 wt%; 0.1 wt% to 90 wt%; 0.1 wt% to 80 wt%; 0.1 wt% to 50 wt%; 0.1 wt% to 30 wt%; 0.1 wt% to 10 wt%; 0.1 wt% to 1 wt%; 1 wt% to 100 wt%; 1 wt% to 90 wt%; 1 wt% to 80 wt%; 1 wt% to 50 wt%; 1 wt% to 30 wt%; 1 wt% to 10 wt%; 10 wt% to 100 wt%; 10 wt% to 90 wt%; 10 wt% to 80 wt%; 10 wt% to 50 wt%; 10 wt% to 30 wt%; 30 wt% to 100 wt%; 30 wt% to 90 wt%; 30 wt% to 80 wt%; 30 wt% to 50 wt%; 50 wt% to 100 wt%; 50 wt% to 90 wt%; 50 wt% to 80 wt%; or 80 wt% to 100 wt%.

[0106] If the monomer capable of polymerizing the above acrylic resin is less than 0.01 wt% in the paint composition visible only to the long-wave infrared, a problem of non-absorption may occur, and up to 100 wt% of pure infrared-absorbing nanoparticle dispersion solids can be used as a colored paint.

[0107] In an embodiment of the present invention, the paint composition may have a transmittance of 80% or less in a wavelength range of 0.7 ㎛ to 14 ㎛.

[0108] Therefore, it is possible to manufacture a special pigment that absorbs infrared rays and is invisible to the eye.

[0109]

[0110] A coating composition visible only in the long-wave infrared according to another embodiment of the present invention comprises plasmonic nanoparticles doped with cationic particles or anionic particles, a dispersant, and water.

[0111] In an embodiment of the present invention, the water is present in an amount of 0.01 wt% to 100 wt%; 0.01 wt% to 90 wt%; 0.01 wt% to 80 wt%; 0.01 wt% to 50 wt%; 0.01 wt% to 30 wt%; 0.01 wt% to 10 wt%; 0.01 wt% to 1 wt%; 0.01 wt% to 0.1 wt%; 0.1 wt% to 100 wt%; 0.1 wt% to 90 wt%; 0.1 wt% to 80 wt%; 0.1 wt% to 50 wt%; 0.1 wt% to 30 wt%; 0.1 wt% to 10 wt%; 0.1 wt% to 1 wt%; 1 wt% to 100 wt%; 1 wt% to 90 wt%; 1 wt% to 80 wt%; 1 wt% to 50 wt%; 1 wt% to 30 wt%; 1 wt% to 10 wt%; 10 wt% to 100 wt%; 10 wt% to 90 wt%; 10 wt% to 80 wt%; 10 wt% to 50 wt%; 10 wt% to 30 wt%; 30 wt% to 100 wt%; 30 wt% to 90 wt%; 30 wt% to 80 wt%; 30 wt% to 50 wt%; 50 wt% to 100 wt%; 50 wt% to 90 wt%; 50 wt% to 80 wt%; or 80 wt% to 100 wt%.

[0112] If the water content is less than 0.01 wt% in the paint composition that is visible only to the long-wave infrared, a problem of non-absorption may occur, and up to 100 wt% of pure infrared-absorbing nanoparticle dispersion solids can be used as a color paint.

[0113] The paint composition of the present invention, which is visible only to long-wave infrared rays and contains water, can be used as an aqueous paint when the water content is 20 wt% to 90 wt%, and can be used as a solid paint when the water content is less than 20 wt%.

[0114] Other than that, since it is the same as the component included in the paint composition visible only to long-wave infrared rays containing a monomer capable of polymerizing an acrylic resin described above, duplicate description is omitted below.

[0115] According to one embodiment of the present invention, a paint composition visible only in long-wave infrared light has the effect of absorbing infrared light while remaining invisible to the naked eye, thereby attracting interest in artworks expressing creativity and sensitivity from various perspectives. This can broaden the color worldview of modern art. Furthermore, beyond simple artworks, the composition can be applied in spatial art, temporal art, fusion art, and cultural arts education.

[0116]

[0117] A method for producing a paint composition visible only in long-wave infrared according to another embodiment of the present invention comprises the steps of preparing a precursor solution containing plasmonic nanoparticles, adding doped particles to the precursor solution to produce plasmonic nanoparticles, dispersing the resulting product of the plasmonic nanoparticles by ligand stripping, and including a monomer or water capable of polymerizing an acrylic resin.

[0118] The step of preparing the above precursor solution is a step of preparing a precursor solution containing plasmonic nanoparticles before introducing doped particles.

[0119] The above plasmonic nanoparticles may include at least one selected from the group consisting of nanoparticles containing free electrons (Free Carriers), which can later induce doping due to the free electrons as doping particles, for example, indium oxide (In2O3), tungsten oxide (WOx), molybdenum oxide (MoOx), zinc oxide (ZnO), titanium oxide (TiO2), aluminum oxide (Al2O3), vanadium oxide (V2O3 / VO2), hafnium oxide (HfO2), cerium oxide (CeO2), copper sulfide (CuSx), silicon nitride (SiN), and titanium nitride (TiN).

[0120] Preferably, it may be indium oxide (In2O3) or tungsten oxide (WOx), whose plasmon absorption overlaps with the solar infrared spectrum (14,000 cm-1 to 4,000 cm-1).

[0121] The solvent of the precursor solution included in the above precursor solution may be a solvent in which a nucleation-growth step can proceed through a subsequent doping process with doping particles, for example, a fat-soluble solvent including at least one selected from the group consisting of olefin acid, Oleyl alcohol, octylamine, trioctylamine, and octadecene.

[0122] Meanwhile, it can be a water-soluble polar solvent that can proceed with the nucleation-growth stage by proceeding with aqueous phase synthesis using the sol-gel process nanoparticle synthesis technique.

[0123] The step of manufacturing the above plasmonic nanoparticles is a step of manufacturing a resultant product including plasmonic nanoparticles by adding doped particles to the precursor solution prepared in the step of preparing the precursor solution.

[0124] The above doping particle may be a particle that induces free electrons (Free Carriers) of the plasmonic nanoparticles, specifically, a particle capable of inducing doping from free electrons (Free Carriers) included in the plasmonic nanoparticles, for example, a cationic particle including at least one selected from the group consisting of tin (Sn), zirconium (Zr), cerium (Ce), cesium (Cs), aluminum (Al), gallium (Ga), indium (In), tungsten (W), and molybdenum (Mo); or an anionic particle including at least one selected from the group consisting of fluorine (F), chlorine (Cl), and bromine (Br).

[0125] Preferably, the doping particle is a tin (Sn) cation particle with high free electron activity due to minimization of the doping element lattice strain caused by a similar element radius by substituting a metal lattice site, or an anion particle that increases additional free electron activity by substituting an oxygen lattice site.

[0126] The doping particles introduced into the precursor solution may be included in an amount of 50 wt% or less, preferably, 1 wt% to 10 wt%, based on 100 wt% of the precursor solution.

[0127] Beyond the above range, if the content of doping particles is too low, there is a disadvantage in that the infrared absorption function is reduced due to low nanoparticle film deposition at a low capacity by spin coating, blade coating, or spray coating, and there is no physical upper weight limit as it is transparent in the visible light region and only the infrared absorption function is expressed, but if the content of doping particles is too high, there is a disadvantage in economic factors such as a reduction in the cost of using nanoparticles and the possibility of excessive red shift.

[0128] By adding doping particles to the precursor solution containing the above plasmonic nanoparticles, the doping particles can induce doping with free electrons (free carriers) contained in the plasmonic nanoparticles. As the nucleation-growth step progresses along with the above doping process, plasmonic nanoparticles can ultimately be manufactured.

[0129] The above dispersing step is a step of dispersing the plasmonic nanoparticles manufactured through the step of manufacturing the plasmonic nanoparticles by ligand stripping. In particular, by removing the ligand on the surface of the plasmonic nanoparticles through the dispersing step, not only a highly volatile non-polar solution but also compatibility with an eco-friendly water-soluble polar solution is secured in terms of industrial production, thereby securing a wide range of production process flexibility under haze-free thin film conditions. As a result, it is easy to disperse in a non-polar solvent, and it is characterized by easy dispersion with a polar solution that can be additionally added when manufacturing a thin film optical material in the future.

[0130] In the step of manufacturing the above plasmonic nanoparticles, if the solvent included in the resultant product of the plasmonic nanoparticles is a fat-soluble solution, the nanoparticle surface is composed of a fat-soluble ligand, and the solution can be dispersed by mixing with the nonpolar solution due to the miscibility of nonpolar molecules and the fat-soluble surface. Specifically, the nonpolar solution may include at least one selected from the group consisting of hexane, toluene, benzene, chloroform, pentane, octane, and tetrachloroethylene.

[0131] In one embodiment, additionally, when mixing with a non-polar solution, a Meerwein salt may be further added for dispersion. This is to prevent the surface ligand from being removed by a solution-phase high-temperature heat treatment physical technique and to enable chemical nanoparticle surface ligand substitution. Specifically, the Meerwein salt may include at least one selected from the group consisting of tetrafluoroborate groups, nitrosonium tetrafluoroborate, triethyloxonium tetrafluoroborate, and compounds containing a hydroxyl group (NaOH, KOH, etc.).

[0132] Through the above process, the ligand is removed from the surface of the plasmonic nanoparticles, so that the haze is minimized and light scattering is minimized, making it easy to disperse in polar and non-polar solutions. In addition, localized surface plasmon resonance (LSPR) is generated, so that only infrared rays are selectively absorbed, thereby blocking solar heat.

[0133] The step of mixing the monomer or water capable of polymerizing the acrylic resin is a step of mixing the monomer or water capable of polymerizing the acrylic resin into the plasmonic nanoparticles doped with the manufactured cationic particles or anionic particles.

[0134] In an embodiment of the present invention, the monomer capable of polymerizing the acrylic resin may be selected from an acrylic monomer, a (meth)acrylic acid ester monomer, or a mixture thereof.

[0135] In an embodiment of the present invention, the acrylic monomer or (meth)acrylic acid ester monomer may include at least one selected from the group consisting of acrylic acid, 2-ethylhexyl acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, hexyl (meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and isononyl (meth)acrylate.

[0136] The dispersion result obtained through the step of including the monomer or water capable of polymerizing the acrylic resin can be used as an acrylic paint, paint or solid paint, as it includes the monomer or water capable of polymerizing the acrylic resin.

[0137]

[0138] A picture according to another embodiment of the present invention is drawn using a paint composition visible only to long-wave infrared according to one embodiment of the present invention.

[0139] The above picture may include any printed matter drawn or written on paper, canvas, cloth, etc.

[0140] The paint composition visible only to the long-wave infrared can be painted into a picture by coloring using any one of the paint compositions in the form of acrylic paint, water-based paint or solid paint.

[0141] The picture of the present invention can also be attached to a film by encapsulating it within a film component such as a canvas, an acrylic plate, an iron plate, or a wall surface.

[0142]

[0143] According to another embodiment of the present invention, a sculpture is made using a paint composition that is visible only to long-wave infrared rays according to one embodiment of the present invention.

[0144] The paint composition of the present invention, which is visible only to long-wave infrared rays, can produce not only two-dimensional pictures but also three-dimensional sculptures.

[0145] In glass crafts, nanoparticles can be fixed inside the glass, or a single layer, multilayer uniform layer, or irregular nanoparticle layer can be interposed between the film and the vehicle glass.

[0146]

[0147] Hereinafter, the present invention will be described in more detail by way of examples.

[0148] However, the following examples are only intended to illustrate the present invention, and the content of the present invention is not limited to the following examples.

[0149]

[0150] [Example]

[0151] Indium acetate, a raw material for indium oxide (In2O3), a semiconductor nanoparticle, was mixed with oleic acid, a fat-soluble solution, to prepare an indium oleate precursor solution.

[0152] Next, a compound (Sn(ac)4) containing tin cation-doped particles was added to an indium oleate precursor solution, and plasmonic nanoparticles were manufactured by including tin cation-doped particles in an amount of 1 wt% based on 100 wt% of the precursor solution containing the doped particles.

[0153] Then, the resultant product of the above plasmonic nanoparticles was mixed with hexane, a nonpolar solution, and nitrosonium tetrafluoroborate, a Meerwein salt, was added to disperse the plasmonic nanoparticles with the ligand removed on the surface.

[0154] The plasmonic nanoparticles from which the ligand has been removed were added to 5 wt% of 2-ethylhexyl acrylate as the acrylic monomer to prepare a paint composition that is visible only in the long-wave infrared and can be used as an acrylic paint.

[0155] FIGS. 5A and 5B are microscope images showing infrared absorbing indium tin oxide according to one embodiment of the present invention.

[0156] Figure 5a is taken at a ratio of x55000, and Figure 5b is taken at a ratio of x70000.

[0157]

[0158] A painting was made on canvas using a paint composition that is visible only to long-wave infrared light.

[0159]

[0160] FIG. 6a is an image of a painting drawn on a canvas using a paint composition visible only to infrared rays according to an embodiment of the present invention, taken with a visible light camera, and FIG. 6b is an image of a painting drawn on a canvas using a paint composition visible only to infrared rays according to an embodiment of the present invention, taken with an infrared camera.

[0161] FIG. 7a is an image of a painting drawn on a canvas using a paint composition visible only to infrared rays according to an embodiment of the present invention, taken with a visible light camera, and FIG. 7b is an image of a painting drawn on a canvas using a paint composition visible only to infrared rays according to an embodiment of the present invention, taken with an infrared camera.

[0162] Referring to FIGS. 6a and 7a, nothing is visible to the visible light camera, but in FIGS. 6b and 7b, it can be confirmed that a picture has been drawn on the canvas through the infrared camera.

[0163] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will readily appreciate that the present invention can be readily modified into other specific forms without altering the technical spirit or essential characteristics of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single entity may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined manner.

[0164] The scope of the present invention is indicated by the claims described below, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

[0165]

[0166] The mode for carrying out the invention has been described together with the best mode for carrying out the invention above.

[0167]

[0168] The present invention relates to a method for producing a resin and nanocrystal compound and a paint composition produced thereby that is visible only in the long-wave infrared region, and more specifically, to a method for producing a resin and nanocrystal compound by mixing it into a transparent resin and producing a light absorption element or the like through a process such as UV curing, and a special paint composition containing plasmonic nanoparticles doped and dispersed so that they are not recognized in the visible light region but are visible in the long-wave infrared region, and therefore has industrial applicability.

Claims

1. Nanocrystal material: A step of uniformly mixing transparent resin in a ratio of 1:5 to 30; A step of removing air bubbles generated when mixing the above nanocrystal material and transparent resin; and A step of curing the mixture from which the bubbles have been removed using a UV lamp is included, The above nanocrystal material has infrared absorption properties, and the above transparent resin is characterized in that it is curable by UV. The above transparent resin is, It is characterized by at least one of acrylic resin, silicone resin or ABS resin, It is characterized in that the transparency of the mixture is controlled by the mixing ratio of the nanocrystal material, The above nanocrystal material is, It is characterized by at least one selected from the group consisting of indium tin oxide (Sn:In2O3), tungsten oxide (WOx), molybdenum oxide (MoOx), zinc oxide (ZnO), titanium oxide (TiO2), aluminum oxide (Al2O3), vanadium oxide (V2O3 / VO2), hafnium oxide (HfO2), cerium oxide (CeO2), copper sulfide (CuSx), silicon nitride (SiN), and titanium nitride (TiN). Doped with one or more cations selected from the group consisting of tin (Sn), zirconium (Zr), cerium (Ce), cesium (Cs), aluminum (Al), gallium (Ga), indium (In), tungsten (W), and molybdenum (Mo), A method for producing a resin and nanocrystal compound, characterized in that the resin and nanocrystal compound are doped with one or more anions selected from the group consisting of fluorine (F), chlorine (Cl), bromine (Br), and elemental vacancy.

2. In paragraph 1, The above hardening step is, Including a photoinitiator activation step that transfers the mixture to a higher energy state by exposing it to UV light, Characterized in that it includes one or more post-processing processes among blade coating, spin coating, screen printing, and roll-to-roll printing. Method for producing resin and nanocrystal compounds.

3. In paragraph 1, After the above photoinitiator activation step, A method for producing a resin and nanocrystal compound, characterized in that it comprises a step of forming a polymer structure by allowing the activated photoinitiator to interact with a monomer molecule having a double bond.

4. A resin and nanocrystal compound manufactured by any one of the methods of claims 1 to 3.

5. Nanocrystal material: A transparent resin that is uniformly mixed in a ratio of 1:5 to 30 and then hardened. The above nanocrystal material has infrared absorption properties, and the resin is characterized by being transparent and curable by UV. The above transparent resin is, Characterized by at least one of acrylic resin, silicone resin or ABS resin, The above nanocrystal material is, Including at least one selected from the group consisting of indium tin oxide (Sn:In2O3), tungsten oxide (WOx), molybdenum oxide (MoOx), zinc oxide (ZnO), titanium oxide (TiO2), aluminum oxide (Al2O3), vanadium oxide (V2O3 / VO2), hafnium oxide (HfO2), cerium oxide (CeO2), copper sulfide (CuSx), silicon nitride (SiN), and titanium nitride (TiN), The above nanocrystal material is, A light absorbing element characterized in that it is doped with one or more cations selected from the group consisting of tin (Sn), zirconium (Zr), cerium (Ce), cesium (Cs), aluminum (Al), gallium (Ga), indium (In), tungsten (W), and molybdenum (Mo), and one or more anions selected from the group consisting of fluorine (F), chlorine (Cl), bromine (Br), and elemental vacancy.

6. In a paint composition manufactured by a method according to any one of claims 1 to 3, The above paint composition, Plasmonic nanoparticles doped with cationic or anionic particles; dispersant; and A monomer capable of polymerizing acrylic resins; Including, but not limited to, The monomer capable of polymerizing the above acrylic resin is, Characterized in that it is 0.01 wt% to 100 wt% of a paint composition that is visible only in long-wave infrared, A paint composition visible only in long-wave infrared light, manufactured by a method for manufacturing a resin and nanocrystal compound.

7. In a paint composition manufactured by a method according to any one of claims 1 to 3, The above paint composition, Plasmonic nanoparticles doped with cationic or anionic particles; dispersant; and water; Including, but not limited to, The above water, Characterized in that it is 0.01 wt% to 100 wt% of a paint composition that is visible only in long-wave infrared, A paint composition visible only in long-wave infrared light, manufactured by a method for manufacturing a resin and nanocrystal compound.

8. In paragraph 6 or 7, The above plasmonic nanoparticles are, Localized surface plasmon resonance (LSPR) occurs, selectively absorbing only infrared light. Contains at least one selected from the group consisting of indium oxide (In2O3), tungsten oxide (WOx), molybdenum oxide (MoOx), zinc oxide (ZnO), titanium oxide (TiO2), aluminum oxide (Al2O3), vanadium oxide (V2O3 / VO2), hafnium oxide (HfO2), cerium oxide (CeO2), copper sulfide (CuSx), silicon nitride (SiN), and titanium nitride (TiN), Contains at least one selected from the group consisting of a sphere, a cube, a rounded cube, a polygon particle, and an irregular particle, Characterized by an average diameter of 3 nm to 500 nm, A paint composition visible only in long-wave infrared light, manufactured by a method for manufacturing a resin and nanocrystal compound.

9. In paragraph 6 or 7, The above cationic particles are, Containing at least one selected from the group consisting of tin (Sn), zirconium (Zr), cerium (Ce), cesium (Cs), aluminum (Al), gallium (Ga), indium (In), tungsten (W), and molybdenum (Mo), The average diameter is 0.71 Å to 1.93 Å, The above anion particles are, Containing at least one selected from the group consisting of fluorine (F), chlorine (Cl) and bromine (Br), characterized by an average diameter of 1.19 Å to 1.81 Å, A paint composition visible only in long-wave infrared light, manufactured by a method for manufacturing a resin and nanocrystal compound.

10. In paragraph 6 or 7, The above plasmonic nanoparticles are, Characterized in that it is 0.01 wt% to 100 wt% of the paint composition that is visible only to the long-wave infrared, The above cationic particles or the above anionic particles, It is characterized in that it is 0.01 wt% to 15 wt% of the paint composition that is visible only to the long-wave infrared, The above dispersant is, Characterized in that it is 0.01 wt% to 100 wt% of the paint composition that is visible only to the long-wave infrared, The above paint composition, Characterized in that the transmittance is 80% or less in the wavelength range of 0.7 ㎛ to 14 ㎛, A paint composition visible only in long-wave infrared light, manufactured by a method for manufacturing a resin and nanocrystal compound.

11. In paragraph 6 or 7, The above dispersant is, Characterized in that it comprises at least one selected from the group consisting of hexane, toluene, benzene, chloroform, pentane, octane, and tetrachloroethylene. A paint composition visible only in long-wave infrared light, manufactured by a method for manufacturing a resin and nanocrystal compound.

12. In paragraph 6, The monomer capable of polymerizing the above acrylic resin is, It is selected from acrylic monomers or (meth)acrylic acid ester monomers or mixtures thereof, The above acrylic monomer or the above (meth)acrylic acid ester monomer, Characterized in that it comprises at least one selected from the group consisting of acrylic acid, 2-ethylhexyl acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, hexyl (meth)acrylate, n-octyl (meth)acrylate, isooctyl (meth)acrylate, 2-ethylhexyl (meth)acrylate and isononyl (meth)acrylate. A paint composition visible only in long-wave infrared light, manufactured by a method for manufacturing a resin and nanocrystal compound.

13. A drawing drawn using a paint composition visible only in long-wave infrared according to paragraph 6 or 7.

14. A sculpture made of a paint composition visible only in long-wave infrared according to Article 6 or 7.

Images