Luminous color powder and preparation method thereof

Abstract

The application relates to the technical field of luminescent color powder, and particularly discloses a noctilucent color powder and a preparation method thereof. The noctilucent color powder comprises noctilucent powder and a reinforcing layer, the reinforcing layer is formed on the surface of the noctilucent powder by a reinforcing coating, and the reinforcing coating is mainly made of the following raw materials: a light absorber, a solvent, a filler, a defoaming agent, a dispersing agent, an acrylic emulsion and an auxiliary agent. The preparation method comprises the following steps: mixing the acrylic emulsion, 1 / 3-1 / 2 of the light absorber and 1 / 4-1 / 2 of the auxiliary agent to obtain a mixture one; mixing the filler, the remaining auxiliary agent and the remaining light absorber to obtain a mixture two; mixing the solvent, the defoaming agent, the dispersing agent, the mixture one and the mixture two to obtain the reinforcing coating; immersing the noctilucent powder in the reinforcing coating, taking out and drying, forming the reinforcing layer on the surface of the noctilucent powder, and obtaining the noctilucent color powder. The noctilucent color powder has a long light-emitting time and stable light-emitting performance.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of luminescent color powder, in particular to a luminescent color powder and a preparation method thereof. BACKGROUND

[0002] Plastic toys are a kind of toys, and are favored by children due to various types. The plastic toy is a material which is mainly composed of high molecular synthetic resin, various auxiliary materials or additives, has plasticity and fluidity under specific temperature and pressure, can be molded into a certain shape, and keeps the shape unchanged under certain conditions.

[0003] Meanwhile, with the progress of society and the continuous improvement of living standards, children's requirements for toys are further improved, and toys are required to be novel and beautiful. In order to further improve the attractiveness of toys, luminescent powder is usually added to the preparation material of the plastic toy during the preparation of the plastic toy, so that the prepared plastic toy can emit light when playing at night, thereby attracting the interest of children.

[0004] The luminescent powder is a light-storing and light-emitting material, has powder and granular shape, is non-toxic and harmless, can be used for long-term repeated light absorption and light emission, and has high cost performance. The luminescent product has been widely applied, and has brought great convenience to people's life and work. However, the current luminescent product has a short light-emitting time and cannot meet people's needs.

[0005] Therefore, how to prepare a luminescent powder with a long light-emitting time to meet people's needs is an urgent problem to be solved. SUMMARY

[0006] In order to further improve the light-emitting time of the luminescent color powder, the application provides a luminescent color powder and a preparation method thereof.

[0007] In a first aspect, the application provides a luminescent color powder, which adopts the following technical scheme:

[0008] The luminescent color powder comprises a luminescent powder and a reinforcing layer, the reinforcing layer is formed on the surface of the luminescent powder by a reinforcing coating, and the reinforcing coating is mainly made of the following raw materials in parts by weight:

[0009] 5-10 parts of a light absorber; the light absorber is at least two of micro / nano-structured polyaniline, rare earth strontium aluminate and 2-bromo-9,10-bis(2-naphthyl)anthracene;

[0010] 10-20 parts of a solvent;

[0011] 5-8 parts of a filler;

[0012] 0.5-1 part of an antifoaming agent;

[0013] Dispersant 0.5-1 parts;

[0014] Acrylic emulsion 40-50 parts;

[0015] Auxiliary agent 5-8 parts; the auxiliary agent is composed of polymethyl methacrylate, polystyrene fiber network, diatomite according to the mass ratio (1-2) :(5-6) :(1-3).

[0016] Preferably, the micro / nano structure polyaniline is prepared by a template-free chemical oxidation polymerization method.

[0017] Preferably, the preparation method of the rare earth strontium aluminate comprises the following steps: mixing strontium carbonate and aluminum oxide, adding uranium oxide, dysprosium oxide and boric acid, mixing uniformly to obtain a mixture, placing the mixture into an aluminum oxide boat, placing the aluminum oxide boat in an aluminum oxide tube in a high-temperature tube furnace, at the same time, placing an aluminum oxide boat filled with carbon powder, and firing at a certain temperature for 2-3h. The heating rate is 10℃ / min, and the cooling rate is 5℃ / min. The firing temperature is 1200-1300℃, and the constant temperature treatment is 2-3h. The mass ratio of strontium carbonate, aluminum oxide, uranium oxide, dysprosium oxide and boric acid is 3:4:3:3:1.

[0018] Preferably, the 2-bromo-9,10-bis(2-naphthyl)anthracene is commercially available.

[0019] By adopting the above technical scheme, the enhanced layer formed by wrapping the enhanced coating on the outer layer of the luminescent powder enhances the strength of the luminescent powder on the one hand, and enhances the waterproofness of the prepared luminescent color powder on the other hand. At the same time, the light absorber and the auxiliary agent are added in the enhanced coating. The light absorber, the auxiliary agent, and other components of the enhanced coating interact with each other. The auxiliary agent facilitates to increase the light transmittance of the enhanced layer, so that the light absorber absorbs and stores the passing light, thereby improving the light absorption and light storage of the luminescent color powder, which helps to enhance the light-emitting duration of the luminescent color powder.

[0020] The micro / nano structure polyaniline in the light absorber has a micro / nano structure, and the micro / nano structure is arranged in disorder, which facilitates to increase the contact area of the polyaniline, so as to improve the light absorption rate. The polyaniline contains a large number of benzene rings and -NH2 groups, which may change the conjugation length of the polyaniline, so as to improve the light-emitting intensity of the luminescent color powder.

[0021] The rare earth strontium aluminate in the light absorber has long afterglow luminescence performance, high luminescent efficiency, and stable luminescence performance, which helps to cooperate with the luminescent powder to improve the light-emitting intensity and light-emitting duration of the luminescent powder.

[0022] The 2-bromo-9,10-bis(2-naphthyl) anthracene in the light absorber has a wide energy gap, contains carbon atoms, contains a large pi conjugated bond, and the anthracene is an excellent photochromic group, has a unique planar and rigid molecular structure, and thus has good thermal stability and high luminous efficiency.

[0023] The light transmittance of the polymethyl methacrylate in the auxiliary agent is as high as 92%, which facilitates the light absorption of the light absorber.

[0024] The polystyrene fiber net in the auxiliary agent is made of polystyrene fibers, wherein the light transmittance of the polystyrene is 88% to 92%, most of the light in the visible light region can be transmitted, and the addition of the polystyrene fiber net facilitates the increase of the strength of the reinforcing layer; at the same time, the fiber net structure is similar to the grating structure, the grating structure forms a diffraction effect on the incident light, improves the transmittance of the photons, and increases the absorption of the polymer to the light.

[0025] The diatomite in the auxiliary agent contains materials such as alumina, iron oxide, magnesium oxide, and calcium oxide, and has many through micropores in the diatom shell, is a kind of nanometer microporous material with high porosity and large specific surface area, and helps to increase the light absorption surface and the light emitting surface, and improve the luminous efficiency and service life.

[0026] Preferably, the mass ratio of the light absorber to the auxiliary agent is (6-8):(6-7).

[0027] By adjusting the ratio of the two components, the ratio of the two components is optimized, the light absorber and the auxiliary agent are better matched, and the strength and luminous performance of the luminescent color powder are improved.

[0028] Preferably, the light absorber is composed of micro / nano structured polyaniline, rare earth strontium aluminate, and 2-bromo-9,10-bis(2-naphthyl) anthracene in a mass ratio of (6-8):(1-2):(0.3-0.5).

[0029] By adopting the above technical scheme, the light absorber is composed of micro / nano structured polyaniline, rare earth strontium aluminate, and 2-bromo-9,10-bis(2-naphthyl) anthracene, and the ratio of the three components is adjusted to the best, the micro / nano structured polyaniline has a micro / nano structure, which facilitates the increase of the light absorption rate, and the micro / nano structured polyaniline and 2-bromo-9,10-bis(2-naphthyl) anthracene both introduce photochromic groups into the reinforcing layer, the rare earth strontium aluminate has stable luminous performance, and the three components are added at the same time, and the three components cooperate with each other, which facilitates the improvement of the stability and luminous intensity of the luminescent powder.

[0030] Preferably, the rare earth strontium aluminate is modified rare earth strontium aluminate, and a preparation method of the modified rare earth strontium aluminate comprises the following steps: dipping the rare earth strontium aluminate in a light-transmitting glue to obtain pretreated rare earth strontium aluminate, and mixing the pretreated rare earth strontium aluminate with ethylene-tetrafluoroethylene copolymer and drying.

[0031] Preferably, the light-transmitting glue is commercially available, the model of the light-transmitting glue is 3010, and the manufacturer is Shenzhen Huaseng Tongchuang Technology Co., Ltd.

[0032] By using the above technical scheme, the rare earth strontium aluminate is unstable when it comes into contact with water, the light-transmitting glue is transparent and has good light-transmitting effect and water resistance, and it is convenient to form a bonding layer on the surface of the rare earth strontium aluminate, the water resistance of the high-transmittance material is good, and the light-transmitting effect is not affected, and after the pretreated rare earth strontium aluminate is mixed, it is convenient to form a waterproof layer on the outer layer of the bonding layer of the rare earth strontium aluminate, so as to improve the water resistance of the rare earth strontium aluminate without affecting the light absorption of the rare earth strontium aluminate.

[0033] Preferably, the polymethyl methacrylate is pretreated, and a pretreatment method comprises the following steps: dissolving the polymethyl methacrylate in toluene, adding zinc oxide, ultrasonic treatment, and drying.

[0034] Preferably, the mass ratio of the polymethyl methacrylate to zinc oxide is 20:1.

[0035] Preferably, the ultrasonic treatment time is 20-30 min.

[0036] By using the above technical scheme, the coating on the surface of the luminescent powder needs to be dried, and the adhesion of the strengthening layer on the surface of the luminescent powder is improved, the polymethyl methacrylate may be degraded during the drying process, the polymethyl methacrylate is mixed with zinc oxide, the zinc oxide has a small size and high surface energy, and it can adsorb part of free radicals on the polymethyl methacrylate, so as to reduce the degradation of the polymethyl methacrylate, and the addition of the zinc oxide has little effect on the light-transmitting effect of the polymethyl methacrylate.

[0037] Preferably, the zinc oxide is modified zinc oxide, and a preparation method of the modified zinc oxide comprises the following steps: mixing zinc oxide, silane coupling agent and anhydrous ethanol, ultrasonic dispersion, filtration, and drying the filtrate.

[0038] By adopting the technical scheme, the zinc oxide is treated by the silane coupling agent which is a white slightly transparent waxy solid and has an amphoteric chemical structure, a part of groups in the molecule reacts with various functional groups on the surface of the zinc oxide to form strong physical and chemical bonding, anchoring is formed, and the surface energy of the zinc oxide is reduced and the compatibility between the zinc oxide and the polymethyl methacrylate is improved.

[0039] Preferably, the filler is composed of four-needle zinc oxide whiskers, styrene-acrylonitrile copolymer and talc in a mass ratio of (5-6):(2-3):(5-6).

[0040] By adopting the technical scheme, the four-needle zinc oxide whisker has a three-dimensional structure including a central body and four needle-shaped whiskers, the four needle-shaped whiskers of the four-needle zinc oxide whisker can be directly inserted into the styrene-acrylonitrile copolymer to improve the strength and elasticity of the styrene-acrylonitrile copolymer, and the four-needle zinc oxide whisker and the talc cooperate with each other to further improve the strength of the reinforcing layer.

[0041] Preferably, the acrylic emulsion is composed of pure acrylic emulsion and vinyl acetate-acrylate emulsion in a mass ratio of (1-2):(3-4).

[0042] By adopting the technical scheme, the acrylic emulsion is composed of pure acrylic emulsion and vinyl acetate-acrylate emulsion, which facilitates the full use of the anti-back-stickiness of the pure acrylic emulsion and the water resistance of the vinyl acetate-acrylate emulsion, thereby enhancing the film-forming property and water resistance of the coating, improving the water resistance of the reinforcing layer, and prolonging the luminescence time of the luminescent color powder.

[0043] Preferably, the dispersant is composed of alkylphenol polyoxyethylene ether and sodium pyrophosphate in a mass ratio of (1-2):(3-4).

[0044] By adopting the technical scheme, the addition of the dispersant facilitates the reduction of the surface tension of the system, the dispersant is adsorbed on the surface of the auxiliary agent, the light absorber and the filler to generate charge repulsion and steric hindrance, reduces the flocculation of the auxiliary agent, the light absorber and the filler, thereby facilitating the better cooperation among the three, improving the strength of the reinforcing layer, and improving the light absorption of the reinforcing layer.

[0045] In a second aspect, the application provides a preparation method of the luminescent color powder, which adopts the following technical scheme:

[0046] The preparation method of the luminescent color powder comprises the following steps:

[0047] (1) Preparation of the enhanced paint: S1, Preparation of Mixture One: Mix the acrylic emulsion, 1 / 3-1 / 2 of the light absorber, and 1 / 4-1 / 2 of the auxiliary agent to obtain Mixture One; S2, Preparation of Mixture Two: Mix the filler, the remaining auxiliary agent, and the remaining light absorber to obtain Mixture Two; S3, Preparation of the paint: Mix the solvent, the defoaming agent, the dispersing agent, Mixture One prepared in step S1, and Mixture Two prepared in step S2 to obtain the enhanced paint.

[0048] (2) Preparation of the luminescent color powder: immerse the luminescent powder in the enhanced paint prepared in step (1), take it out and dry it, and form an enhanced layer on the surface of the luminescent powder to obtain the luminescent color powder.

[0049] By using the above technical solution, the luminescent powder is immersed in the enhanced paint, and thus the enhanced layer is formed on the surface of the luminescent powder. The formation of the enhanced layer facilitates the enhancement of the strength and water resistance of the luminescent powder. Meanwhile, the enhanced layer contains the light absorber and the auxiliary agent, which facilitates the cooperation with the luminescent powder to further improve the luminous performance of the prepared luminescent color powder.

[0050] In summary, the present application has the following beneficial effects:

[0051] 1. The luminescent color powder of the present application is coated with an enhanced layer on the surface of the luminescent powder. The enhanced layer is formed by the enhanced paint, and the enhanced paint contains the acrylic emulsion, the auxiliary agent, and the light absorber. Therefore, the strength and water resistance of the luminescent powder are enhanced, and the luminous performance of the luminescent powder is improved.

[0052] 2. The light absorber in the luminescent color powder of the present application is obtained by compounding three components, i.e., micro / nano-structured polyaniline, rare earth strontium aluminate, and 2-bromo-9,10-bis(2-naphthyl)anthracene. The three components cooperate with each other to introduce color groups and luminous substances into the luminescent color powder, thereby improving the light storage and luminous capacity of the luminescent color powder. DETAILED DESCRIPTION

[0053] The present application will be further described in detail below in combination with examples.

[0054] The micro / nano-structured polyaniline of the present application is prepared by a template-free chemical oxidation polymerization method.

[0055] The preparation method of the rare earth strontium aluminate of the present application comprises the following steps: mix strontium carbonate and aluminum oxide, add uranium oxide, dysprosium oxide, and boric acid, mix uniformly to obtain a mixture, put the mixture into an aluminum oxide boat, place the aluminum oxide boat in an aluminum oxide tube in a high-temperature tube furnace, at the same time, put an aluminum oxide boat filled with carbon powder, and calcine at a certain temperature for 2-3 h. The heating rate is 10℃ / min, and the cooling rate is 5℃ / min. The calcination temperature is 1200-1300℃, and the constant temperature treatment is 2-3 h. The mass ratio of strontium carbonate, aluminum oxide, uranium oxide, dysprosium oxide, and boric acid is 3:4:3:3:1.

[0056] 2-bromo-9,10-bis(2-naphthyl)anthracene of the present application is commercially available.

[0057] Ethylene-tetrafluoroethylene copolymer of the present application is commercially available.

[0058] Luminous powder of the present application is commercially available.

[0059] Preparation example of the reinforced coating

[0060] Preparation example 1: a reinforced coating, comprising the following raw materials by weight:

[0061] Light absorber 5kg; the light absorber is composed of micro / nano-structured polyaniline, rare earth strontium aluminate at a mass ratio of 1:1;

[0062] Solvent 10kg; the solvent is ethyl acetate;

[0063] Filling agent 5kg; the filling agent is composed of four needle-shaped zinc oxide whiskers, styrene-acrylonitrile copolymer, talc at a mass ratio of 5:2:5;

[0064] Defoaming agent 0.5kg; the defoaming agent is dimethyl silicone oil;

[0065] Dispersant 0.5kg; the dispersant is composed of alkyl phenol polyoxyethylene ether, sodium pyrophosphate at a mass ratio of 1:3;

[0066] Acrylic emulsion 40kg; the acrylic emulsion is composed of pure acrylic emulsion and vinyl acetate acrylic emulsion at a mass ratio of 1:3;

[0067] Auxiliary agent 5kg; the auxiliary agent is composed of polymethyl methacrylate, polystyrene fiber network, diatomite at a mass ratio of 1:5:1.

[0068] Preparation example 2: a reinforced coating, which is different from preparation example 1 in that it comprises the following raw materials by weight:

[0069] Light absorber 10kg;

[0070] Solvent 20kg;

[0071] Filling agent 8kg; the filling agent is composed of four needle-shaped zinc oxide whiskers, styrene-acrylonitrile copolymer, talc at a mass ratio of 6:3:6;

[0072] Defoaming agent 1kg;

[0073] Dispersant 1kg; the dispersant is composed of alkyl phenol polyoxyethylene ether, sodium pyrophosphate at a mass ratio of 2:4;

[0074] Acrylic emulsion 50kg; the acrylic emulsion is composed of pure acrylic emulsion and vinyl acetate acrylic emulsion at a mass ratio of 2:4;

[0075] Auxiliary agent 8 kg; the auxiliary agent is composed of polymethyl methacrylate, polystyrene fiber network, diatomite with a mass ratio of 2:6:3.

[0076] Preparation example 3: a kind of reinforced coating, the difference from preparation example 2 is that: light absorber 6 kg;Solvent 20 kg;Filler 8 kg;Defoaming agent 1 kg;Dispersant 1 kg;Acrylic emulsion 50 kg;Auxiliary agent 6 kg.

[0077] Preparation example 4: a kind of reinforced coating, the difference from preparation example 2 is that: light absorber 8 kg;Solvent 20 kg;Filler 8 kg;Defoaming agent 1 kg;Dispersant 1 kg;Acrylic emulsion 50 kg;Auxiliary agent 7 kg.

[0078] Preparation example 5: a kind of reinforced coating, the difference from preparation example 4 is that: light absorber is composed of micro / nano structure polyaniline, rare earth strontium aluminate, 2-bromo-9,10-bis (2-naphthyl) anthracene with a mass ratio of 6:1:0.3.

[0079] Preparation example 6: a kind of reinforced coating, the difference from preparation example 4 is that: light absorber is composed of micro / nano structure polyaniline, rare earth strontium aluminate, 2-bromo-9,10-bis (2-naphthyl) anthracene with a mass ratio of 8:2:0.5.

[0080] Preparation example 7: a kind of reinforced coating, the difference from preparation example 6 is that: rare earth strontium aluminate is modified rare earth strontium aluminate, the preparation method of modified rare earth strontium aluminate, including the following steps: the rare earth strontium aluminate is immersed in the light transmission glue, and the immersion time is 10 min, to obtain the pretreated rare earth strontium aluminate, the pretreated rare earth strontium aluminate is mixed with ethylene-tetrafluoroethylene copolymer with a mass ratio of 1:5, and is dried, to obtain the modified rare earth strontium aluminate.

[0081] Preparation example 8: a kind of reinforced coating, the difference from preparation example 7 is that: polymethyl methacrylate is pretreated, the pretreatment method, including the following steps: the polymethyl methacrylate is dissolved in toluene, zinc oxide is added, ultrasonic is treated, and is dried, to obtain the pretreated polymethyl methacrylate. The mass ratio of polymethyl methacrylate and zinc oxide is 20:1; the ultrasonic time is 25 min. The zinc oxide is commercially available.

[0082] Preparation example 9: a kind of reinforced coating, the difference from preparation example 8 is that: zinc oxide is modified zinc oxide, the preparation method of modified zinc oxide, including the following steps: the nano ZnO is put into 80 ℃ vacuum drying box and dried for 24 h, the dried Zn0 is dispersed in anhydrous ethanol, ultrasonic treatment is carried out for 30 min; drop into the silane coupling agent KH-570 with a mass fraction of 5%, after mechanical stirring, at 80 ℃, reaction for 6 h, at room temperature, static for 24 h, washed with isopropyl alcohol for several times and suction filtered, dried at 80 ℃ for 24 h, and ready for use.

[0083] Example

[0084] Example 1: A luminous color powder, comprising a luminous powder and a reinforcing layer, the reinforcing layer is formed on the surface of the luminous powder by a reinforcing coating prepared according to Preparation Example 1.

[0085] The preparation method of the luminous color powder comprises the following steps:

[0086] (1) Preparation of the reinforcing coating: S1, preparation of mixture one: mixing the acrylic emulsion, 1 / 3 of the light absorber, and 1 / 4 of the auxiliary agent to obtain mixture one; S2, preparation of mixture two: mixing the filler, the remaining auxiliary agent, and the remaining light absorber to obtain mixture two; S3, preparation of the coating: mixing the solvent, the defoaming agent, the dispersing agent, the mixture one prepared in step S1, and the mixture two prepared in step S2, and the reinforcing coating is obtained.

[0087] (2) Preparation of the luminous color powder: immersing the luminous powder in the reinforcing coating prepared in step (1) for 20 min, taking out and drying, and forming the reinforcing layer on the surface of the luminous powder to obtain the luminous color powder.

[0088] Table 1: Reinforcing coating for the luminous color powder of Examples 1-9

[0089] No. Enhanced coating Example 1 Preparation 1 Example 2 Preparation 2 Example 3 Preparation 3 Example 4 Preparation 4 Example 5 Preparation 5 Example 6 Preparation 6 Example 7 Preparation 7 Example 8 Preparation 8 Example 9 Preparation 9

[0090] Examples 2-9: A luminous color powder, the reinforcing coating is prepared as shown in Table 1, and the difference from Example 1 is that the preparation example of the reinforcing coating used is different.

[0091] Comparative Examples

[0092] Comparative Example 1: A luminous color powder, and the difference from Example 1 is that it does not contain a reinforcing layer.

[0093] Comparative Example 2: A luminous color powder, and the difference from Example 1 is that the light absorber is not added to the reinforcing coating.

[0094] Comparative Example 3: A luminous color powder, and the difference from Example 1 is that the auxiliary agent is not added to the reinforcing coating.

[0095] Detection method: luminous test: The luminous color powders prepared in Examples 1-9 and Comparative Examples 1-3 are energized under light for 30 min, and then the experiment is carried out in the dark. The luminous properties of the luminous color powders in each group are measured and recorded, and the brightness values (mcd / m 2 ) at 0.5 h, 6 h, 12 h, and 18 h are measured respectively. The detection results are shown in Table 2.

[0096] Table 2: Luminous properties of the luminous color powders of Examples 1-9 and Comparative Examples 1-3

[0097] Index / (mcd / m 2 )]]> 0.5h 6h 12h 18h Example 1 489 87 15.1 2.9 Example 2 495 93 15.7 3.2 Example 3 503 101 16.2 3.6 Example 4 507 105 16.5 3.8 Example 5 527 125 18.1 4.5 Example 6 530 128 18.5 4.7 Example 7 542 140 19.1 5.1 Example 8 551 149 19.6 5.5 Example 9 559 157 20.1 5.9 Comparative Example 1 378 40 5.1 0.4 Comparative Example 2 403 51 7.5 1.1 Comparative Example 3 415 60 9.4 1.8

[0098] In combination with Example 1 and Comparative Examples 1-3 and in combination with the data in Table 2, it can be seen that the luminous color powder prepared in Example 1 has higher luminous brightness and longer luminous time. The surface of the luminous color powder is coated with an enhancement layer, which on the one hand enhances the luminous intensity of the prepared luminous color powder and on the other hand prolongs the luminous time of the prepared luminous color powder. At the same time, the addition of the light absorber in the enhancement layer facilitates the mutual cooperation with other components in the enhancement layer so as to further enhance the luminous performance of the prepared luminous color powder.

[0099] In combination with Examples 1-4 and in combination with the data in Table 2, it can be seen that the luminous color powder prepared in Examples 1-4 has better performance, and the adjustment of the ratio of the components of the enhancement coating facilitates the optimization of the luminous performance of the prepared luminous color powder.

[0100] In combination with Examples 4-6 and in combination with the data in Table 2, it can be seen that the luminous intensity and luminous time of the luminous color powder prepared in Examples 5-6 are superior to those of the luminous color powder prepared in Example 4. The difference between Examples 5-6 and Example 4 is that the light absorber in Examples 5-6 is obtained by compounding three components of micro / nano-structured polyaniline, rare earth strontium aluminate and 2-bromo-9,10-bis(2-naphthyl)anthracene. The three components cooperate with each other to introduce color groups and luminescent materials into the luminous color powder, which helps to further improve the luminous performance of the prepared luminous color powder.

[0101] In combination with Examples 6-7 and in combination with the data in Table 2, it can be seen that the luminous intensity of the luminous color powder prepared in Example 7 is better. In Example 7, the rare earth strontium aluminate is modified, and the modified rare earth strontium aluminate is added to the enhancement coating, which helps to improve the luminous performance of the prepared luminous color powder.

[0102] In combination with Examples 7-8 and in combination with the data in Table 2, it can be seen that the luminous intensity of the luminous color powder prepared in Example 8 is better and the luminous time is longer. Compared with Example 7, in Example 8, the polymethyl methacrylate in the auxiliary agent is pretreated, thereby reducing the dissolution of the polymethyl methacrylate in the subsequent drying process, which facilitates the improvement of the luminous stability of the prepared luminous color powder.

[0103] In combination with Examples 8-9 and in combination with the data in Table 2, it can be seen that the luminous intensity and luminous time of the luminous color powder prepared in Example 9 are superior to those of the luminous color powder prepared in Example 8. In Example 9, the zinc oxide is modified, which improves the compatibility between the zinc oxide and the polymethyl methacrylate, and further improves the luminous performance of the prepared luminous color powder.

[0104] The embodiments are only illustrative of the present application, and are not intended to limit the present application, and those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A noctilucent color powder, characterized in that, The night light powder and the reinforcing layer formed by the reinforcing paint on the surface of the night light powder, the reinforcing paint is mainly made of the following raw materials by weight fraction: 5-10 parts of light absorber; 10-20 parts of solvent; 5-8 parts of filler; 0.5-1 part of defoaming agent; 0.5-1 part of dispersing agent; 40-50 parts of acrylic emulsion; 5-8 parts of auxiliary agent, which is composed of polymethyl methacrylate, polystyrene fiber network and diatomite in a mass ratio of (1-2):(5-6):(1-3); The mass ratio of the light absorber to the auxiliary agent is (6-8):(6-7); The light absorber is composed of micro / nano-structured polyaniline, rare earth strontium aluminate and 2-bromo-9,10-bis(2-naphthyl)anthracene in a mass ratio of (6-8):(1-2):(0.3-0.5).

2. The noctilucent color powder according to claim 1, characterized in that: The rare earth strontium aluminate is modified rare earth strontium aluminate, and the preparation method thereof comprises the following steps: dipping the rare earth strontium aluminate in light-transmitting glue to obtain pretreated rare earth strontium aluminate, mixing the pretreated rare earth strontium aluminate with ethylene-tetrafluoroethylene copolymer, and drying to obtain the modified rare earth strontium aluminate.

3. The noctilucent color powder according to claim 1, characterized in that: The polymethyl methacrylate is pretreated, and the pretreatment method comprises the following steps: dissolving the polymethyl methacrylate in toluene, adding zinc oxide, ultrasonic treatment, and drying to obtain the pretreated polymethyl methacrylate.

4. The noctilucent color powder according to claim 3, characterized in that: The zinc oxide is modified zinc oxide, and the preparation method thereof comprises the following steps: mixing zinc oxide, silane coupling agent and anhydrous ethanol, ultrasonic dispersion, filtration, and drying to obtain the modified zinc oxide.

5. The noctilucent color powder according to claim 1, wherein: The filler is composed of four acicular zinc oxide whiskers, styrene-acrylonitrile copolymer and talc in a mass ratio of (5-6):(2-3):(5-6).

6. The noctilucent color powder according to claim 1, wherein: The acrylic emulsion is composed of pure acrylic emulsion and vinyl acetate-acrylate emulsion in a mass ratio of (1-2):(3-4).

7. The noctilucent color powder according to claim 1, wherein: The dispersing agent is composed of alkylphenol polyoxyethylene ether and sodium pyrophosphate in a mass ratio of (1-2):(3-4).

8. A method of preparing the noctilucent color powder according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: (1) Preparation of the reinforcing paint: S1, preparation of mixture one: mixing acrylic emulsion, 1 / 3-1 / 2 of the light absorber and 1 / 4-1 / 2 of the auxiliary agent to obtain mixture one; S2, preparation of mixture two: mixing the filler, the remaining auxiliary agent and the remaining light absorber to obtain mixture two; S3, preparation of the paint: mixing the solvent, the defoaming agent, the dispersing agent, the mixture one prepared in step S1 and the mixture two prepared in step S2 to obtain the paint; (2) Preparation of the night light color powder: dipping the night light powder in the reinforcing paint prepared in step (1), taking out and drying to form a reinforcing layer on the surface of the night light powder, and obtaining the night light color powder.