Butterfly pupil escape compound eye bionic high-color-gamut nylon sunglasses lens

Abstract

The invention belongs to the technical field of optical lenses. The invention relates to a butterfly pupil escape compound eye bionic high-color-gamut nylon sunglass lens which comprises a lens body and a coating. Wherein the lenses are made of nylon resin; the coating is prepared from the following raw materials in parts by weight: 25 to 40 parts of tetraethoxysilane; 10 to 20 parts of phenyl trimethoxy silane; 4.0 to 8.0 parts of dimethyl dimethoxy silane; 2.0 to 4.0 parts of an MOF color enhancing agent; 20 to 30 parts of isopropanol; 11 to 22 parts of deionized water; and 1.0-3.0 parts of glacial acetic acid. A coating is prepared from a self-made MOF color enhancing agent through molecular design through formula optimization design, and the nylon resin lens is coated with the coating, so that the butterfly pupil escape compound eye bionic high-color-gamut nylon sunglasses lens is obtained. The butterfly pupil escape compound eye bionic high-color-gamut nylon sunglass lens effectively solves the problem that the color identification degree is low after the butterfly pupil escape compound eye bionic high-color-gamut nylon sunglass lens is blocked by 45-90% of light rays at present.

Description

Technical Field

[0001] The present invention relates to a butterfly pupil and compound eye bionic high-color gamut nylon sunglass lens and a preparation method thereof. The present invention belongs to the technical field of optical lenses. Background Art

[0002] Sunglasses, also known as sunshades, are used for sunshading in short. When people wear sunglasses, they can well block the uncomfortable strong light to protect the eyes from ultraviolet damage. Currently, the materials of sunglass lenses include injection-molded lenses such as polycarbonate (PC), polymethyl methacrylate (PMMA), and nylon. Among them, nylon lenses, as high-end lenses, perform excellently in terms of lightness, impact resistance, and optical quality. Combined with the currently popular butterfly pupil and compound eye structure, they are successfully positioned as high-end lenses. The butterfly pupil and compound eye structure is a lens designed based on the bionic compound eye structure. This lens draws on the principle of the microlens array of insect compound eyes. The main lens surface is distributed with regular hexagon or circular microlens units, forming a defocus area similar to that of insect compound eyes, which is used to adjust the light distribution or color gamut performance and is suitable for sports or outdoor scenes. However, nylon lenses also have problems of high wear resistance and processing costs, and it is difficult to add processing aids, pigments, etc. due to the existence of a certain crystalline phase in nylon.

[0003] In addition, due to the inevitable addition of dyes or color powders in nylon sunglass lenses, the full light is blocked, reducing the transmittance of the full light, which to a certain extent leads to the problem of color recognition. Currently, to improve color recognition, the method of adding dyes is mostly used to achieve the enhanced effect of the lens color. The commonly used dyes are divided into inorganic dyes and organic dyes. Among them, inorganic dyes have problems of poor dispersibility in organic matrices; while organic dyes have problems of poor high-temperature resistance and stability in organic matrices. At the same time, it is difficult to add processing aids, dyes, etc. to nylon lenses, or after high-temperature injection molding, the aids or dyes decompose, resulting in deteriorated performance, etc.

[0004] Therefore, protective treatment must be carried out on nylon lenses to ensure their service life. After being processed and injection-molded, nylon lenses must be surface-hardened to meet the collisions, abrasions, and resistance to corrosion by various chemicals during their daily use, making the lenses more durable. In view of the above situation, surface coating treatment of injection-molded nylon lenses containing the butterfly pupil and compound eye structure can not only ensure the retention of nylon material properties but also improve color recognition and color gamut fullness. Summary of the Invention

[0005] The object of the present invention is to provide a butterfly pupil eudipleidoid bionic high-color gamut nylon solar lens and a preparation method thereof for the problem of poor color recognition of butterfly pupil eudipleidoid nylon solar lenses in the prior art. By molecular design, the present invention self-prepares a MOF color enhancer and prepares a nylon lens coating through formulation design. While overcoming the above problems, it also has excellent color-changing sensitivity and broad application potential. The technical solution adopted by the present invention to solve its technical problems is as follows: The present invention provides a preparation method of a MOF color enhancer, comprising the following steps: S11, subjecting a metal ion, an organic ligand, and a structure-directing agent to a solvothermal reaction to obtain an intermediate product I; S12, subjecting the intermediate product I to an adsorption reaction with a dye to obtain an intermediate product II; S13, reacting the intermediate product II with an amino modifier to obtain an intermediate product III; and S14, reacting the intermediate product III with a silane modifier to obtain a target product, namely the MOF color enhancer.

[0006] Further, the molar ratio of the above metal ion, organic ligand, and structure-directing agent is 8.0:(2.0 - 4.0):(0.5 - 1.5); and the above metal ion is a rare earth ion or a transition metal ion; the above organic ligand has a terephthalic acid or trimellitic acid as the parent structure; the above structure-directing agent is 2-methylimidazole.

[0007] Further, the mass ratio of the above intermediate product I to the dye is 1.0:(0.8 - 1.2); and the above dye is at least one of red, green, and blue.

[0008] Further, the dosage ratio of the above intermediate product II to the amino modifier is added according to the molar ratio of the structure-directing agent to the amino modifier (10 - 15):1; and the above amino modifier has a diamine structure.

[0009] Further, the dosage ratio of the above intermediate product III to the silane modifier is added according to the molar ratio of amino to silane modifier 1:1; and the above silane modifier contains another group that can chemically react with amino.

[0010] Further, the above MOF color enhancer is a red color enhancer, a green color enhancer, or a blue color enhancer.

[0011] Another object of the present invention is to provide a MOF color enhancer prepared by the above preparation method.

[0012] Yet another object of the present invention is to provide a butterfly pupil and compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is made of nylon resin; the above coating includes raw materials in the following weight percentages: Tetraethoxysilane 25 - 40 parts; Phenyltrimethoxysilane 10 - 20 parts; Dimethyldimethoxysilane 4.0 - 8.0 parts; MOF color enhancer 2.0 - 4.0 parts; Isopropanol 20 - 30 parts; Deionized water 11 - 22 parts; Glacial acetic acid 1.0 - 3.0 parts.

[0013] Furthermore, The above MOF color enhancer is added in a mass ratio of (0.40 - 0.60) : (0.18 - 0.28) : (0.22 - 0.32) of red color enhancer, green color enhancer, and blue color enhancer.

[0014] Still another object of the present invention is to provide a preparation method of a butterfly pupil and compound eye bionic high-color gamut nylon solar lens, including the following steps: S21, batching, that is, Adding raw materials to a reaction kettle according to the formula ratio, mixing and stirring to obtain a coating; S22, curing, that is, Coating the coating in S21 on the surface of a butterfly pupil and compound eye bionic nylon optical lens to form an optical coating with a thickness of 2.0 - 5.0 μm, and finally putting it into a constant temperature oven for baking and curing, so that the surface of the optical coating is cured and integrated with the nylon optical lens, thus obtaining the above butterfly pupil and compound eye bionic high-color gamut nylon solar lens.

[0015] Advantages of the present invention: (1) The present invention provides a butterfly pupil and compound eye bionic high-color gamut nylon solar lens. The coating formulation system contains a self-made MOF color enhancer, which is a substance containing dyes and silane structures. First, the silane structure ensures its excellent dispersibility in silicone coatings and improves performance. Second, the coating has a silicone resin structure, which not only has excellent optical properties but also has excellent hardness, wear resistance, stain resistance, etc. Third, the dyes are adsorbed in the MOF color enhancer. On the one hand, the porous structure of MOF can physically adsorb dyes; on the other hand, the active sites in the MOF material can coordinate with the dyes for chemical adsorption, while improving color uniformity. In addition, it can be formulated according to user preferences to select different hues for customization.

[0016] (2) The present invention provides a butterfly pupil and compound eye bionic high-color gamut nylon solar lens. The self-made MOF color enhancer in the coating formulation system is composed of a red color enhancer, a green color enhancer, and a blue color enhancer. First, the MOF color enhancer uses rare earth ions or transition metal ions as the core, has excellent ultraviolet absorption effects, and even has a certain absorption of short-wave blue light, with anti-ultraviolet and anti-blue light properties. Second, the MOF color enhancer can emit fluorescence after absorbing ultraviolet light, with a specific color enhancement effect. Third, red, green, and blue are the three primary colors. While having color reducibility, they absorb intermediate colors, effectively improving the color contrast, and ultimately enhancing color recognition; it has the characteristics of wearing comfort.

[0017] (3) The present invention provides a butterfly pupil and compound eye bionic high-color gamut nylon solar lens. Coated with a silicone coating on a nylon resin lens, on the one hand, while giving full play to the characteristics of high transparency and light weight of the nylon lens, it can effectively solve the problem of poor scratch resistance of the nylon lens. On the other hand, it endows the nylon solar lens with multifunctional properties such as anti-fouling, anti-fingerprint, decorative, and durability, which can meet its practical significance as a high-end lens. Detailed implementation mode

[0018] The present invention will be described in detail below with reference to the embodiments. However, it should be understood that the following embodiments are only illustrative examples of the implementation modes of the present invention, rather than limiting the scope of the present invention.

[0019] The objective of the present invention is to develop a butterfly-pupil compound-eye bionic high-color-gamut nylon solar lens to meet the application requirements of existing high-end nylon lenses in terms of color recognition. The implementation idea is as follows: First, considering the problems of difficult addition of additives to nylon resin and its poor wear resistance, surface coating technology is used for implementation construction to address the problem of easy crystallization during construction; Second, according to the requirements of coating performance, dyes are added to meet the light-blocking requirements of solar lenses, and color enhancers are added to improve color contrast and thus enhance color recognition. Regarding the second point above, a self-made color enhancer with both light resistance and the function of improving color contrast is applied to the coating in order to solve the above problems.

[0020] As is well known, green, blue, and red, as the three primary colors, can produce different colors through any combination. By controlling the addition amounts of the three primary colors, namely green, blue, and red, the contrast is adjusted to increase color contrast and enhance color recognition. At the same time, rare-earth-based or transition-metal-based MOF materials also have ultraviolet absorption, short-wave blue light absorption, and fluorescence emission, which further increase color contrast and have the effect of anti-ultraviolet and anti-blue light. Applying them to silicone coatings has good effects. The theoretical basis for the implementation of the present invention lies in: the preparation of the MOF color enhancer. First, a coordination reaction between metal ions and organic ligands is carried out; then, a co-blending adsorption reaction between the MOF material and small-molecule dyes is carried out; then, a ligand substitution reaction with diamine is carried out; finally, an addition reaction between the pendant amino group and an electrophilic reagent is used to obtain the target product. The above self-made MOF color enhancer is formulated with silicone resin, solvent, and catalyst, and cured to prepare the target product, namely the butterfly-pupil compound-eye bionic high-color-gamut nylon solar lens.

[0021] In addition, the mainstream colors of nylon solar lenses can be adjusted to include black and gray lenses, gradient blue, gradient brown, brown, red, blue, green, yellow, etc. according to the types and proportions of dyes used; in the present invention, red, blue, and green lenses are taken as examples to illustrate the high-color-gamut nylon solar lenses. The embodiments of the present invention are as follows: The embodiment of the present invention provides a preparation method of an MOF color enhancer, including the following steps: S11, Place metal ions, organic ligands, and structure-directing agents in a reaction kettle, add N,N-dimethylformamide A, dissolve by ultrasonic treatment, then transfer to a sealed container, heat to 120 - 150 °C and react for 20 - 48 h, then cool to room temperature, filter, take the insoluble matter, wash it with N,N-dimethylformamide B, and dry at 60 °C for 12 h to obtain intermediate product I.

[0022] The molar ratio of the above metal ions, organic ligands, and structure-directing agents is 8.0:(2.0 - 4.0):(0.5 - 1.5); and The above metal ions are rare-earth ions or transition-metal ions; The rare earth ions described above may be europium ions, terbium ions, dysprosium ions, etc.; The transition metal ions described above may be iron ions, copper ions, cadmium ions, zinc ions, etc.; The anions corresponding to the metal ions described above may be sulfate, nitrate, chloride, acetate, etc.; and, nitrate is preferably used.

[0023] The organic ligand has a terephthalic acid or trimesic acid as the parent structure; The terephthalic acid as the parent structure may be terephthalic acid, 2-aminoterephthalic acid, 2-hydroxyterephthalic acid, 2-methyl-1,4-terephthalic acid, 2-methoxyterephthalic acid, etc.; and, 2-methoxyterephthalic acid is preferably used; The trimesic acid as the parent structure may be trimesic acid, 2-aminobenzene-1,3,5-tricarboxylic acid, 2-methoxy-1,3,5-benzenetricarboxylic acid, etc.; and, trimesic acid is preferably used.

[0024] The structure-directing agent described above is 2-methylimidazole.

[0025] S12. Place the intermediate I in N,N-dimethylformamide containing a dye, soak at room temperature for 18 - 24 h; after the reaction ends, filter, take the insoluble matter, dry at 40 °C for 8 h to obtain intermediate II.

[0026] The mass ratio of the intermediate I to the dye described above is 1.0:(0.8 - 1.2); and The dye described above is at least one of red, green, and blue.

[0027] The red dye described above is solvent red 31 (CAS: 6226 90 0); The green dye described above is solvent green 7 (CAS: 6358 69 6); The blue dye described above is solvent blue 97 (CAS: 32724 62 2).

[0028] S13. Add the intermediate II to absolute ethanol A, add an amino modifier, stir and reflux for 10 h, cool to room temperature, filter, take the insoluble matter, wash with absolute ethanol B, and dry at 40 °C for 12 h to obtain intermediate III.

[0029] The dosage ratio of the intermediate II to the amino modifier described above is added according to the molar ratio of the structure-directing agent to the amino modifier (10 - 15):1; and The above amino modifier has a diamine structure. One end of the amino group serves as the site for substituting 2-methylimidazole, and the other amino group forms a pendant structure, and the pendant amino group serves as the basis for the next reaction. If the molecular structure chain length of the amino group in the diamine is too long, it is not easy to form an amino pendant structure; if the chain length is too short, the reaction efficiency is relatively low, and the modification efficiency of the next reaction decreases. Therefore, the diamine can be ethylenediamine, 1,3-propanediamine, tetramethylenediamine or 1,6-hexanediamine, etc.; and preferably 1,3-propanediamine.

[0030] S14, Add the intermediate product III and the silane modifier to N,N-dimethylformamide, stir at 25-40 °C for 6-10 h, then cool to room temperature, filter, take the insoluble matter, wash it with absolute ethanol, and dry it at 40 °C for 12 h to obtain the target product, namely the MOF color enhancer.

[0031] The dosage ratio of the above intermediate product III to the silane modifier is added according to the molar ratio of amino group to silane modifier of 1:1; and The above silane modifier contains another group that can chemically react with the amino group; the other group can be an epoxy group or an acryloyloxy group; The above epoxy silane can be KH561, KH560, KH577 or KH578, etc.; and preferably KH560; The above acryloyloxy silane can be KH570, KH571 or KH670, etc.; and preferably KH570.

[0032] The above MOF color enhancer is a red color enhancer, a green color enhancer or a blue color enhancer.

[0033] The above red color enhancer is a europium-based MOF material or an iron-based MOF material; The above green color enhancer is a terbium-based MOF material, a copper-based MOF material or a cadmium-based MOF material; The above blue color enhancer is a dysprosium-based MOF material or a zinc-based MOF material.

[0034] Another object of the embodiments of the present invention is to provide a MOF color enhancer prepared by the above preparation method.

[0035] The MOF color enhancer prepared in the present invention can effectively block all light rays and be used as solar lenses. The dyes in the MOF color enhancer can absorb light rays of specific wavelengths. Among them, the red dye mainly absorbs blue and green light and only allows red light to pass through, which can improve the visual contrast and clarity and is suitable for wearing in foggy weather or environments with heavy pollution; the green dye mainly absorbs red and blue light and only allows green light to pass through, can effectively absorb infrared and ultraviolet light, and at the same time distorts the colors of objects outside the lens, which is suitable for people with easily fatigued eyes or the elderly; the blue dye mainly absorbs red and green light and only allows blue light to pass through, which can provide good protection for the eyes.

[0036] In addition, the MOF color enhancer prepared in the present invention, the red color enhancer, the green color enhancer, and the blue color enhancer can absorb ultraviolet light and part of short-wave blue light, and at the same time can emit corresponding red light, green light, and blue light, which can effectively improve the color contrast and improve the color change recognition rate. By selectively absorbing light of specific wavelengths, the MOF color enhancer can enhance the contrast of other colors, make the lens present more vivid colors, and improve visual clarity and color recognition.

[0037] Another object of the embodiment of the present invention is to provide a butterfly pupil and compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is made of nylon resin; the above coating includes raw materials in the following weight percentages: Tetraethoxysilane 25 - 40 parts; Phenyltrimethoxysilane 10 - 20 parts; Dimethyldimethoxysilane 4.0 - 8.0 parts; MOF color enhancer 2.0 - 4.0 parts; Isopropanol 20 - 30 parts; Deionized water 11 - 22 parts; Glacial acetic acid 1.0 - 3.0 parts.

[0038] The above MOF color enhancer is added in a mass ratio of (0.40 - 0.60):(0.18 - 0.28):(0.22 - 0.32) of red color enhancer, green color enhancer, and blue color enhancer.

[0039] Another object of the embodiment of the present invention is to provide a preparation method of a butterfly pupil and compound eye bionic high-color gamut nylon solar lens, including the following steps: S21, ingredient preparation, that is Add raw materials to the reaction kettle according to the formula ratio, stir at 1200 r / min for 30 min, and then reduce the speed to 500 r / min and mix and stir for 6 h to obtain the coating; S22, curing, that is Under the conditions of a controlled temperature of 20 - 25 °C and a humidity of 30 - 50%, the coating material in S21 is applied to the surface of the nylon optical lens at a speed of 0.02 - 0.2 cm 2 / s to form an optical coating with a thickness of 2.0 - 5.0 μm. Finally, it is placed in a constant-temperature oven and baked at a temperature of 60 - 80 °C for 2 - 5 h to cure, so that the surface of the optical coating is cured and integrated with the nylon optical lens, and the above-mentioned butterfly-pupil and compound-eye bionic high-color gamut nylon solar lens is obtained.

[0040] The above-mentioned nylon optical lens is prepared by injection molding with nylon resin; the nylon resin is PA12 (polycaprolactam) and is purchased from Evonik Industries AG, Germany.

[0041] To further understand the present invention, the following provides a detailed description of a butterfly-pupil and compound-eye bionic high-color gamut nylon solar lens provided by the present invention in combination with specific embodiments. The protection scope of the present invention is not limited by the following embodiments.

[0042] Example 1 This example provides a preparation method of a MOF color enhancer, including the following steps: S11, Put europium nitrate, 2-methoxyterephthalic acid, and 2-methylimidazole into a reaction kettle, add N,N-dimethylformamide A, ultrasonically dissolve it, transfer it to a closed container, heat it to 130 °C and react for 40 h, then cool it to room temperature, filter, take the insoluble matter, wash it with N,N-dimethylformamide B, and dry it at 60 °C for 12 h to obtain intermediate product I.

[0043] The molar ratio of the above-mentioned europium nitrate, 2-methoxyterephthalic acid, and 2-methylimidazole is 8.0:3.0:1.0.

[0044] Its infrared data is as follows: 3308 cm -1 : -NH- exists; 3011 cm -1 , 1496 cm -1 , 1594 cm -1 : Benzene ring exists; 1760 cm -1 : -C=O (carboxyl group) does not exist; 1649 cm -1 : -C=O coordination exists; 1382 cm -1 , 1428 cm -1 : Carboxylate exists; 1562 cm -1 : -C=N- does not exist; 1504 cm -1 : -C=N- coordination exists.

[0045] S12, Immerse intermediate product I in N,N-dimethylformamide containing dye at room temperature for 20 h; after the reaction is completed, filter, take the insoluble matter, and dry it at 40 °C for 8 h to obtain intermediate product II.

[0046] The mass ratio of the above intermediate I to the dye is 1.0:1.0; and The above dye is a mixture of a red dye, a green dye, and a blue dye added in a mass ratio of 7:2:1.

[0047] Its infrared data is as follows: 3488 cm -1 : -OH is present; 3309 cm -1 : -NH- is present; 3011 cm -1 , 1496 cm -1 , 1594 cm -1 : The benzene ring is present and enhanced; 1649 cm -1 : -C=O coordination is present; 1382 cm -1 , 1428 cm -1 : Carboxylate is present; 1560 cm -1 : -C=N- is present; 1507 cm -1 : -C=N- coordination is present; 1672 cm -1 : -N=N- is present; 1196 cm -1 , 1401 cm -1 : -S=O is present.

[0048] S13, Add intermediate II to anhydrous ethanol A, add 1,3-propanediamine, stir and reflux for 10 h, cool to room temperature, filter, take the insoluble matter, wash it with anhydrous ethanol B, and dry it at 40 °C for 12 h to obtain intermediate III.

[0049] The dosage ratio of the above intermediate II to 1,3-propanediamine is added according to the molar ratio of 2-methylimidazole to 1,3-propanediamine of 12:1.

[0050] Its infrared data is as follows: 3488 cm -1 : -OH is present; 3309 cm -1 : -NH- is present and enhanced; 3011 cm -1 , 1496 cm -1 , 1594 cm -1 : The benzene ring is present; 1649 cm -1 : -C=O coordination is present; 1382 cm -1 , 1428 cm -1 : Carboxylate is present; 1560 cm -1 : -C=N- is present; 1507 cm -1 : -C=N- coordination is present and weakened; 1672 cm -1 : -N=N- is present; 1196 cm -1 , 1401 cm -1: -S=O exists.

[0051] S14. Add the intermediate product III and the silane modifier KH560 into N,N-dimethylformamide, stir at 25 °C for 6 h, then cool to room temperature, filter, take the insoluble matter, wash it with absolute ethanol, and dry it at 40 °C for 12 h to obtain the target product, that is, the MOF color enhancer (red color enhancer, denoted as Eu@MOF red color enhancer).

[0052] The dosage ratio of the above intermediate product III to the silane modifier KH560 is added according to the molar ratio of amino group to silane modifier KH560 of 1:1.

[0053] Its infrared data is as follows: 3487 cm -1 : -OH exists and is enhanced; 3309 cm -1 : -NH- exists and is weakened; 3011 cm -1 、1496 cm -1 、1594 cm -1 : Benzene ring exists; 1649 cm -1 : -C=O coordination exists; 1382 cm -1 、1428 cm -1 : Carboxylate exists; 1560 cm -1 : -C=N- exists; 1507 cm -1 : -C=N- coordination exists; 1672 cm -1 : -N=N- exists; 1196 cm -1 、1401 cm -1 : -S=O exists; 1263 cm -1 、893 cm -1 、825 cm -1 : Epoxy group does not exist; 1109 cm -1 、799 cm -1 : -Si-O- exists.

[0054] Fluorescence excitation and emission spectra: 590 nm and 615 nm are the characteristic spectral lines of Eu 3+ ; 615 nm is the strongest characteristic emission peak.

[0055] Another object of this embodiment is to provide a MOF color enhancer prepared by the above preparation method.

[0056] In this embodiment, the preparation method of other MOF color enhancers is the same as that of Eu@MOF red color enhancer, except that the europium ions in the above europium nitrate are replaced with corresponding metal ions; the specific corresponding relationship is as follows: Tb@MOF green color enhancer, that is, replacing europium ions with terbium ions; Dy@MOF blue color enhancer, replacing europium ions with dysprosium ions.

[0057] Another object of this embodiment is to provide a butterfly pupil compound eye bionic high color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is made of nylon resin; the above coating includes the following raw materials in parts by weight percentage: Tetraethoxysilane 32 parts; Phenyltrimethoxysilane 15 parts; Dimethyldimethoxysilane 6.0 parts; MOF color enhancer 3.0 parts; Isopropanol 25 parts; Deionized water 17 parts; Glacial acetic acid 2.0 parts.

[0058] The above MOF color enhancer is added in a mass ratio of 0.50:0.24:0.26 for Eu@MOF red color enhancer, Tb@MOF green color enhancer, and Dy@MOF blue color enhancer.

[0059] Another object of this embodiment is to provide a preparation method of a butterfly pupil compound eye bionic high color gamut nylon solar lens, including the following steps: S21, ingredient preparation, that is Add raw materials to the reaction kettle according to the formula ratio, stir at 1200 r / min for 30 min, then reduce the speed to 500 r / min and mix and stir for 6 h to obtain the coating; S22, curing, that is Under the condition of controlling the temperature at 23 °C and the humidity at 40%, coat the coating in S21 on the surface of the nylon optical lens at a speed of 0.1 cm 2 / s to form an optical coating with a thickness of 4.0 μm. Finally, put it into a constant temperature oven and bake at 70 °C for 3 h to cure, so that the surface of the optical coating is cured and integrated with the nylon optical lens, and the above-mentioned butterfly pupil compound eye bionic high color gamut nylon solar lens is obtained.

[0060] Example 2 This embodiment provides a preparation method of a MOF color enhancer, including the following steps: S11, put europium nitrate, 2-methoxyterephthalic acid, and 2-methylimidazole into the reaction kettle, add N,N-dimethylformamide A, dissolve by ultrasonic, transfer to a sealed container, heat to 150 °C and react for 20 h, then cool to room temperature, filter, take the insoluble matter, wash it with N,N-dimethylformamide B, and dry at 60 °C for 12 h to obtain intermediate product I.

[0061] The molar ratio of the above europium nitrate, 2-methoxyterephthalic acid, and 2-methylimidazole is 8.0:2.0:1.5.

[0062] S12. Immerse the intermediate product I in N,N-dimethylformamide of the dye and soak it at room temperature for 18 h. After the reaction is completed, filter, take the insoluble matter, and dry it at 40 °C for 8 h to obtain intermediate product II.

[0063] The mass ratio of the above intermediate product I to the dye is 1.0:1.0; and The above dye is a mixture of a red dye, a green dye, and a blue dye added in a mass ratio of 2:7:1.

[0064] S13. Add intermediate product II to anhydrous ethanol A, add 1,3-propanediamine, stir and reflux for 10 h, cool to room temperature, filter, take the insoluble matter, wash it with anhydrous ethanol B, and dry it at 40 °C for 12 h to obtain intermediate product III.

[0065] The dosage ratio of the above intermediate product II to 1,3-propanediamine is added according to the molar ratio of 2-methylimidazole to 1,3-propanediamine of 10:1.

[0066] S14. Add intermediate product III and silane modifier KH560 to N,N-dimethylformamide, stir at 25 °C for 6 h, then cool to room temperature, filter, take the insoluble matter, wash it with anhydrous ethanol, and dry it at 40 °C for 12 h to obtain the target product, namely the MOF color enhancer (MOF red dye, denoted as Eu@MOF red dye).

[0067] The dosage ratio of the above intermediate product III to silane modifier KH560 is added according to the molar ratio of amino group to silane modifier KH560 of 1:1.

[0068] Another object of this embodiment is to provide a MOF color enhancer prepared by the above preparation method.

[0069] The preparation method of other MOF color enhancers in this embodiment is the same as that of Eu@MOF red dye, except that the europium ions in the above europium nitrate are replaced with corresponding metal ions; the specific corresponding relationship is as follows: Tb@MOF green dye, that is, replacing europium ions with terbium ions; Dy@MOF blue dye, that is, replacing europium ions with dysprosium ions.

[0070] Another object of this embodiment is to provide a butterfly pupil compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is made of nylon resin; the above coating includes the following raw materials in parts by weight: Tetraethoxysilane 25 parts; Phenyltrimethoxysilane 20 parts; Dimethyldimethoxysilane 8.0 parts; 4.0 parts of MOF color enhancer; 20 parts of isopropanol; 22 parts of deionized water; 1.0 part of glacial acetic acid.

[0071] The above-mentioned MOF color enhancer is added in a mass ratio of 0.50:0.24:0.26 for Eu@MOF red dye, Tb@MOF green dye, and Dy@MOF blue dye.

[0072] Another object of this embodiment is to provide a preparation method of a butterfly pupil compound eye bionic high-color gamut nylon solar lens, including the following steps: S21, batching, that is Add raw materials to the reaction kettle according to the formula ratio, stir at 1200 r / min for 30 min, reduce the speed to 500 r / min and mix and stir for 6 h to obtain the coating; S22, curing, that is Under the conditions of a temperature of 25 °C and a humidity of 30%, coat the coating in S21 on the surface of the nylon optical lens at a speed of 0.02 cm 2 / s to form an optical coating with a thickness of 2.0 μm, and finally put it into a constant temperature oven and bake at a temperature of 60 °C for 5 h to cure, so that the surface of the optical coating is cured and integrated with the nylon optical lens, and the above-mentioned butterfly pupil compound eye bionic high-color gamut nylon solar lens is obtained.

[0073] Example 3 This embodiment provides a preparation method of a MOF color enhancer, including the following steps: S11, Put europium nitrate, 2-methoxyterephthalic acid, and 2-methylimidazole into the reaction kettle, add N,N-dimethylformamide A, dissolve by ultrasonic wave, transfer to a sealed container, heat to 120 °C and react for 48 h, then cool to room temperature, filter, take the insoluble matter, wash with N,N-dimethylformamide B, and dry at 60 °C for 12 h to obtain intermediate product I.

[0074] The molar ratio of the above-mentioned europium nitrate, 2-methoxyterephthalic acid, and 2-methylimidazole is 8.0:4.0:0.5.

[0075] S12, Immerse intermediate product I in N,N-dimethylformamide containing dye at room temperature for 24 h; after the reaction is completed, filter, take the insoluble matter, and dry at 40 °C for 8 h to obtain intermediate product II.

[0076] The mass ratio of the above-mentioned intermediate product I to the dye is 1.0:1.0; and The above-mentioned dye is a mixture of red dye, green dye, and blue dye added in a mass ratio of 1:2:7.

[0077] S13. Add the intermediate product II into absolute ethanol A, add 1,3-propanediamine, stir and reflux for 10 h, cool to room temperature, filter, take the insoluble matter, wash it with absolute ethanol B, and dry it at 40 °C for 12 h to obtain intermediate product III.

[0078] The dosage ratio of the above intermediate product II to 1,3-propanediamine is added according to the molar ratio of 2-methylimidazole to 1,3-propanediamine of 15:1.

[0079] S14. Add the intermediate product III and the silane modifier KH560 into N,N-dimethylformamide, stir at 25 °C for 6 h, then cool to room temperature, filter, take the insoluble matter, wash it with absolute ethanol, and dry it at 40 °C for 12 h to obtain the target product, namely the MOF color enhancer (MOF red dye, denoted as Eu@MOF red dye).

[0080] The dosage ratio of the above intermediate product III to the silane modifier KH560 is added according to the molar ratio of amino group to silane modifier KH560 of 1:1.

[0081] Another object of this embodiment is to provide a MOF color enhancer prepared by the above preparation method.

[0082] In this embodiment, the preparation method of other MOF color enhancers is the same as that of Eu@MOF red dye, except that the europium ions in the above europium nitrate are replaced with corresponding metal ions; the specific corresponding relationship is as follows: Tb@MOF green dye, that is, replacing europium ions with terbium ions; Dy@MOF blue dye, that is, replacing europium ions with dysprosium ions.

[0083] Another object of this embodiment is to provide a butterfly pupil compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is nylon resin; the above coating includes the following raw materials in parts by weight: Tetraethoxysilane 40 parts; Phenyltrimethoxysilane 10 parts; Dimethyldimethoxysilane 4.0 parts; MOF color enhancer 2.0 parts; Isopropanol 30 parts; Deionized water 11 parts; Glacial acetic acid 3.0 parts.

[0084] The above MOF color enhancer is added according to the mass ratio of Eu@MOF red dye, Tb@MOF green dye, and Dy@MOF blue dye of 0.50:0.24:0.26.

[0085] Another object of this embodiment is to provide a method for preparing a butterfly pupil eudiple eye bionic high color gamut nylon solar lens, which includes the following steps: S21, ingredient preparation, that is Add raw materials into the reaction kettle according to the formula ratio, stir at 1200 r / min for 30 min, and then reduce the speed to 500 r / min and mix and stir for 6 h to obtain the coating; S22, curing, that is Under the conditions of a temperature of 20 °C and a humidity of 50%, coat the coating in S21 on the surface of the nylon optical lens at a speed of 0.2 cm 2 / s to form an optical coating with a thickness of 5.0 μm. Finally, put it into a constant temperature oven and bake at 80 °C for 2 h to cure, so that the surface of the optical coating is cured and integrated with the nylon optical lens, and the above-mentioned butterfly pupil eudiple eye bionic high color gamut nylon solar lens is obtained.

[0086] Example 4 The others are the same as those in Example 1, the difference is: For a method for preparing a MOF color enhancer, in S11, Replace terephthalic acid with 2-methoxyterephthalic acid.

[0087] Example 5 The others are the same as those in Example 1, the difference is: For a method for preparing a MOF color enhancer, in S11, Replace terephthalic acid with trimesic acid.

[0088] Example 6 The others are the same as those in Example 1, the difference is: For a method for preparing a MOF color enhancer, in S12, The mass ratio of intermediate product I to the dye is 1.0:0.8.

[0089] Example 7 The others are the same as those in Example 1, the difference is: For a method for preparing a MOF color enhancer, in S12, The mass ratio of intermediate product I to the dye is 1.0:1.2.

[0090] Example 8 The others are the same as those in Example 1, the difference is: For a method for preparing a MOF color enhancer, in S12, The dye is a red dye.

[0091] Example 9 The others are the same as those in Example 1, the difference is: A preparation method of a MOF color enhancer. In S12, The dye is a green dye.

[0092] Example 10 The others are the same as in Example 1, except that: A preparation method of a MOF color enhancer. In S14, The intermediate product III and the silane modifier KH570 are added to N,N-dimethylformamide. After stirring at 40°C for 10 h, it is cooled to room temperature, filtered, the insoluble matter is taken, washed with absolute ethanol, and dried at 40°C for 12 h to obtain the target product, namely the MOF color enhancer (MOF red color enhancer, denoted as Eu@MOF red color enhancer).

[0093] The dosage ratio of the above intermediate product III to the silane modifier KH570 is added according to the molar ratio of amino group to silane modifier KH570 of 1:1.

[0094] Example 11 The others are the same as in Example 1, except that: A butterfly pupil compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is nylon resin; in the above coating formula, The above MOF color enhancer is added in a mass ratio of 0.40:0.28:0.32 for Eu@MOF red color enhancer, Tb@MOF green color enhancer, and Dy@MOF blue color enhancer.

[0095] Example 12 The others are the same as in Example 1, except that: A butterfly pupil compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is nylon resin; in the above coating formula, The above MOF color enhancer is added in a mass ratio of 0.60:0.18:0.22 for Eu@MOF red color enhancer, Tb@MOF green color enhancer, and Dy@MOF blue color enhancer.

[0096] Example 13 The others are the same as in Example 1, except that: A butterfly pupil compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is nylon resin; in the above coating formula, The above MOF color enhancer is added in a mass ratio of 0.50:0.24:0.26 for Fe@MOF red color enhancer, Cu@MOF green color enhancer, and Zn@MOF blue color enhancer.

[0097] The preparation method of the above-mentioned MOF color enhancer is the same as that of the Eu@MOF red color enhancer, except that the europium ions in the above-mentioned europium nitrate are replaced with corresponding metal ions; the specific corresponding relationships are as follows: Fe@MOF red color enhancer, that is, replacing europium ions with iron ions; Cu@MOF green color enhancer, that is, replacing europium ions with copper ions; Zn@MOF blue color enhancer, that is, replacing europium ions with zinc ions.

[0098] Example 14 Others are the same as Example 1, except that: A kind of butterfly pupil and compound eye bionic high-color gamut nylon solar lens, the above lens includes a lens body and a coating; the above lens is made of nylon resin; in the above coating formula, The above-mentioned MOF color enhancer is added in a mass ratio of 0.50:0.24:0.26 of Fe@MOF red color enhancer, Cd@MOF green color enhancer, and Zn@MOF blue color enhancer.

[0099] The preparation method of the above-mentioned MOF color enhancer is the same as that of the Eu@MOF red color enhancer, except that the europium ions in the above-mentioned europium nitrate are replaced with corresponding metal ions; the specific corresponding relationships are as follows: Fe@MOF red color enhancer, that is, replacing europium ions with iron ions; Cd@MOF green color enhancer, that is, replacing europium ions with cadmium ions; Zn@MOF blue color enhancer, that is, replacing europium ions with zinc ions.

[0100] The following butterfly pupil and compound eye bionic high-color gamut nylon solar lenses in the comparative examples are all compared with Example 1: Comparative Example 1 of the implementation Others are the same as Example 1, except that: A kind of butterfly pupil and compound eye bionic high-color gamut nylon solar lens, the above lens includes a lens body and a coating; the above lens is made of nylon resin; in the above coating formula, No MOF color enhancer is added.

[0101] Comparative Example 2 of the implementation Others are the same as Example 1, except that: A kind of butterfly pupil and compound eye bionic high-color gamut nylon solar lens, the above lens includes a lens body and a coating; the above lens is made of nylon resin; in the above coating formula, The MOF color enhancer is Eu@MOF red color enhancer, Tb@MOF green color enhancer, and Dy@MOF blue color enhancer added in a mass ratio of 0.50:0.24:0, that is, no Dy@MOF blue color enhancer is added.

[0102] Implement Comparative Example 3 The rest is the same as in Example 1, except that: A butterfly pupil and compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is made of nylon resin; in the above coating formula, The MOF color enhancer is added in a mass ratio of 0.50:0:0 of Eu@MOF red color enhancer, Tb@MOF green color enhancer, and Dy@MOF blue color enhancer, that is, only Eu@MOF red color enhancer is added.

[0103] Implement Comparative Example 4 The rest is the same as in Example 1, except that: A preparation method of a MOF color enhancer. In S12, The mass ratio of the above intermediate product I to the dye is 1.0:0; that is, no dye is added.

[0104] Implement Comparative Example 5 The rest is the same as in Example 1, except that: A butterfly pupil and compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is made of nylon resin; in the above coating formula, The MOF color enhancer is replaced with the MOF color enhancer and the dye added in a mass ratio of 1:1 in Comparative Example 4.

[0105] Implement Comparative Example 6 The rest is the same as in Example 1, except that: A butterfly pupil and compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is made of nylon resin; in the above coating formula, The MOF color enhancer is replaced with Intermediate Product II in Example 1.

[0106] Implement Comparative Example 7 The rest is the same as in Example 1, except that: A butterfly pupil and compound eye bionic high-color gamut nylon solar lens. The above lens includes a lens body and a coating; the above lens is made of nylon resin; in the above coating formula, The MOF color enhancer is replaced with Intermediate Product III in Example 1.

[0107] The physical properties of the butterfly pupil and compound eye bionic high-color gamut nylon solar lenses prepared in the examples and comparative examples of the present invention were measured respectively, and the results are shown in Table 1.

[0108] Table 1 Physical test performance of each example First, it can be concluded from Examples 1-14 in Table 1 that the butterfly-pupil eudipleidocentric bionic high-color-gamut nylon solar lens of the present invention has excellent ultraviolet and blue light absorption effects, as well as excellent absorption effects in transition colors; it can effectively obtain color contrast, thus achieving high color recognition performance; at the same time, it also has excellent anti-fouling properties.

[0109] Second, from Examples 1 and Comparative Examples 1-3, it can be observed that the coating of the butterfly-pupil eudipleidocentric bionic high-color-gamut nylon solar lens in the present invention uses a self-made MOF color enhancer, which has excellent blocking effects on all light rays; at the same time, after triple-color compounding, it has a better color enhancement effect on specific colors, improving color recognition. From Examples 1 and Comparative Examples 4-5, it can be observed that the self-made MOF color enhancer in the coating of the butterfly-pupil eudipleidocentric bionic high-color-gamut nylon solar lens in the present invention has better color contrast compared with the dye-free system; in addition, compared with the physical blending system, it has higher color recognition; from Examples 1 and Comparative Examples 6-7, it can be observed that the self-made MOF color enhancer in the coating of the butterfly-pupil eudipleidocentric bionic high-color-gamut nylon solar lens in the present invention has high dispersibility and reactivity, and has better anti-fouling properties, etc.

[0110] In summary, the butterfly-pupil eudipleidocentric bionic high-color-gamut nylon solar lens of the present invention uses nylon resin as the lens body, the coating uses a self-made MOF color enhancer, and through formula design, an organosilicon resin system is adopted, which has high color recognition, anti-fouling and good experience comfort, etc.

[0111] The test methods are as follows: (1) Lens color: Visually observe the lens color.

[0112] (2) Light transmittance: Detection luminosity: '0.00D, detection instrument: UV 2600, environmental conditions: temperature 28°C. Record the average transmittance of each wavelength band.

[0113] (3) Water contact angle: Test according to the method described in ASTM D 5725 1999(R2008).

[0114] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for preparing a MOF color enhancer, characterized in that: The following steps are involved: S11, subjecting metal ions, organic ligands, and structure-directing agents to a solvothermal reaction to obtain an intermediate product I; S12, subjecting the intermediate product I to an adsorption reaction with a dye to obtain an intermediate product II; S13, reacting the intermediate product II with an amino modifier to obtain an intermediate product III; and S14, reacting the intermediate product III with a silane modifier to obtain a target product, namely, a MOF color enhancer.

2. The preparation method according to claim 1, characterized in that: The molar ratio of the metal ion, the organic ligand, and the structure directing agent is 8.0:(2.0-4.0):(0.5-1.5); and The metal ions are rare earth ions or transition metal ions; The organic ligand is based on terephthalic acid or trimesic acid as a parent structure; The structure directing agent is 2-methylimidazole.

3. The preparation method according to claim 1, characterized in that: The mass ratio of the intermediate product I to the dye is 1.0:(0.8-1.2); and The dye is at least one of red, green and blue.

4. The preparation method according to claim 1, characterized in that: The intermediate product II and the amino modifier are added in a molar ratio of the structure directing agent to the amino modifier (10-15):1; and The amino modifier is a diamine structure.

5. The preparation method according to claim 1, characterized in that: The intermediate product III and the silane modifier are added in a molar ratio of amino group to silane modifier of 1:1; and The silane modifier contains another group that can react chemically with the amino group.

6. The preparation method according to claim 1, characterized in that: The MOF color enhancer is a red color enhancer, a green color enhancer or a blue color enhancer.

7. A MOF color enhancer, characterized in that: Prepared by the preparation method according to any one of claims 1 to 6.

8. A butterfly pupil compound eye bionic high color gamut nylon sun lens, characterized in that: The lens comprises a lens body and a coating; the lens is made of nylon resin; the coating comprises the following raw materials in percentage by weight: 25-40 parts of tetraethoxysilane; 10-20 parts of phenyltrimethoxysilane; 4.0-8.0 parts of dimethyldimethoxysilane; 2.0-4.0 parts of MOF color enhancer; 20-30 parts of isopropyl alcohol; 11-22 parts of deionized water; 1.0-3.0 parts of glacial acetic acid.

9. The butterfly pupil compound eye bionic high color gamut nylon sun lens according to claim 8, characterized in that: The MOF color enhancer is a red color enhancer, a green color enhancer, and a blue color enhancer added in a mass ratio of (0.40-0.60): (0.18-0.28): (0.22-0.32).

10. A method for preparing a butterfly pupil compound eye bionic high color gamut nylon sun lens, characterized in that: The steps include: S21, ingredients, i.e. Adding raw materials into the reaction kettle according to the formula ratio, mixing and stirring to obtain the coating; S22, solidification, i.e. The coating in S21 is applied on the surface of the Butterfly Eye Compound Eye bionic nylon optical lens to form an optical coating with a thickness of 2.0-5.0 μm, and finally placed in a constant temperature oven for baking and curing, so that the optical coating surface is cured and integrated with the nylon optical lens to obtain the Butterfly Eye Compound Eye bionic high color gamut nylon sun lens.

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