Bacteriostatic and disinfection diffusion plate as well as preparation method and application thereof

Abstract

The invention relates to the technical field of disinfection lamps, in particular to a bacteriostatic disinfection diffusion plate and a preparation method and application thereof, and the bacteriostatic disinfection diffusion plate comprises the following components in parts by mass: 67-85 parts of polypropylene; 5-10 parts of a light diffusion agent; 0.1 part to 0.5 part of an antioxidant; 0.1 to 0.3 part of a light stabilizer; 0.1 part to 1.0 part of a dispersing agent; 2-4 parts of zinc oxide; 0.5 to 1 part of phenyl thiol ligand modified quantum dots; 1 to 2 parts of titanium dioxide nano particles; 1 to 3 parts of silicon dioxide aerogel microspheres; 0.5 to 1 part of a plant extract; 1-2 parts of a zeolite molecular sieve; 0.5 to 1 part of graphene quantum dots; 1-2 parts of tourmaline powder; 1-2 parts of far infrared ceramic powder; 0.1 part to 0.5 part of black phosphorus nanosheets; 0.2 to 1 part of a rare earth doped upconversion material; and 0.5 to 1.5 parts of nano silver particles modified by chitosan.

Description

Technical Field

[0001] The present invention relates to the technical field of disinfection lamps, and specifically to an antibacterial disinfection diffusion plate, a preparation method thereof, and an application thereof. Background Art

[0002] With the technological development and popularization of cold light sources such as LEDs, higher requirements have been put forward for lamp materials. It is not only necessary to have excellent light diffusion effect and light penetration, but also to have a certain antibacterial and disinfection function. Traditional light diffusion materials mainly improve their optical properties by adding inorganic or organic light diffusing agents, but these materials often lack effective antibacterial ability and cannot meet the application requirements in high-hygiene standard environments.

[0003] For example, PMMA (polymethyl methacrylate) materials are widely used in the lamp field due to their good light transmittance and dimensional stability. However, it is difficult to achieve both excellent light diffusion effect and high light transmittance when the thickness is large. In addition, although some existing modified materials have added certain antibacterial components, these components are usually limited to surface treatment, with limited effect and insufficient persistence.

[0004] With the continuous improvement of the requirements for indoor environmental quality, traditional light diffusion materials can no longer meet modern needs. Existing materials often focus on the optimization of single functions, such as light diffusion or antibacterial, but lack comprehensive solutions. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an antibacterial disinfection diffusion plate, a preparation method thereof, and an application thereof. It not only has excellent light diffusion performance, but also can continuously release antibacterial components harmless to humans and organisms, and is applicable to places such as hospital operating rooms, school canteens, and household appliances that require high-efficiency lighting and air purification.

[0006] According to the first aspect of the present invention, an antibacterial disinfection diffusion plate is provided, which includes, by mass fraction:

[0007] Polypropylene (PP): 70 parts - 80 parts;

[0008] Light diffusing agent (barium sulfate): 5 parts - 10 parts;

[0009] Antioxidant: 0.1 part - 0.5 part;

[0010] Light stabilizer: 0.1 part - 0.3 part;

[0011] Dispersant: 0.1 part - 1.0 part;

[0012] Zinc oxide: 2 parts - 4 parts;

[0013] Quantum dots modified with phenylthiol ligand: 0.5 part - 1 part;

[0014] Titanium dioxide (TiO2) nanoparticles: 1 part - 2 parts;

[0015] Silica aerogel microspheres: 1 part - 3 parts;

[0016] Plant extracts (such as tea tree essential oil or eucalyptus oil): 0.5 part - 1 part;

[0017] Zeolite molecular sieve: 1 part - 2 parts;

[0018] Graphene quantum dots (GQDs): 0.5 part - 1 part;

[0019] Tourmaline powder: 1 part - 2 parts;

[0020] Far-infrared ceramic powder: 1 part - 2 parts;

[0021] Black phosphorus nanosheets (BPNS): 0.1 part - 0.5 part;

[0022] Rare earth-doped upconversion materials: 0.2 part - 1 part;

[0023] Chitosan-modified silver nanoparticles: 0.5 part - 1.5 parts.

[0024] According to an embodiment of the present invention, the light diffusing agent is barium sulfate, an inorganic light diffusing agent;

[0025] The light stabilizer is a hindered amine light stabilizer;

[0026] The dispersant is ethylene bisstearamide.

[0027] Silver nanoparticles, as highly efficient broad-spectrum antibacterial agents, can inhibit the growth of bacteria by destroying their cell walls. When used in combination with zinc oxide, the overall antibacterial effect can be enhanced, providing more comprehensive protection. Chitosan has natural antibacterial properties and can enhance the dispersibility and antibacterial effect of silver nanoparticles. Acting synergistically with plant extracts, multiple antibacterial mechanisms are formed.

[0028] Quantum dots modified with phenylthiol ligands: Quantum dots with energy levels regulated by phenylthiol ligands can not only improve the luminescence efficiency and stability of the material but also further enhance the light diffusion performance. These quantum dots can emit bright visible light under ultraviolet or blue light excitation, contributing to improving the light efficiency of lighting devices.

[0029] Titanium dioxide (TiO2) nanoparticles can generate strongly oxidizing free radicals under ultraviolet light irradiation, effectively killing bacteria and viruses in the air and decomposing organic pollutants. When acting together with zinc oxide and silver nanoparticles, multi-level sterilization and purification effects can be achieved.

[0030] By adding silica aerogel microspheres, not only the light scattering effect is improved, but also the overall light transmittance and uniformity of the board are increased.

[0031] Using zeolite molecular sieve as a sustained-release carrier and combining it with plant extracts (such as tea tree essential oil or eucalyptus oil) can achieve the effect of continuously releasing antibacterial components in the air. This method can not only effectively purify the microorganisms in the air, but also avoid the pungent smell or other discomforts caused by a large amount of one-time release.

[0032] The addition of tourmaline powder enables the light diffusing plate to continuously release negative ions, effectively neutralize harmful substances in the air, improve air quality, and provide a healthier indoor environment. The application of far-infrared ceramic powder not only improves the functional diversity of the light diffusing plate, but also can promote human blood circulation and metabolism through radiating far-infrared rays, providing a more comfortable lighting experience.

[0033] Black phosphorus has excellent photocatalytic performance, can generate reactive oxygen species (ROS) under visible light, and enhance the antibacterial and disinfection effects. Acting synergistically with titanium dioxide (TiO2), it broadens the wavelength range of photocatalytic response. At a low addition amount, the influence of black phosphorus nanosheets on light transmittance is small because it is dispersed in the matrix and does not form a continuous light absorption layer, and a light diffusing agent (such as barium sulfate) can partially compensate for the light absorption of black phosphorus and maintain a certain light transmittance.

[0034] According to an embodiment of the present invention, the antioxidant is a compound of a phosphite antioxidant and a phenolic antioxidant;

[0035] Among them, the mass ratio of the phosphite antioxidant to the phenolic antioxidant is 1:1.

[0036] According to an embodiment of the present invention, the plant extract is a natural plant extract, including one or both of tea tree essential oil or eucalyptus oil.

[0037] According to an embodiment of the present invention, the rare earth doped upconversion material is ytterbium and erbium co-doped sodium yttrium fluoride (NaYF4:Yb,Er);

[0038] Among them, the doping amount of ytterbium is 20%-30 mol%, and the doping amount of erbium is 1%-2 mol%.

[0039] The rare earth doped upconversion material can convert infrared light into visible light, enhance the photocatalytic activity of titanium dioxide (TiO2) and black phosphorus. Acting synergistically with far-infrared ceramic powder, it improves the far-infrared radiation efficiency.

[0040] According to an embodiment of the present invention, the phenylthiol ligand-modified quantum dots are cadmium selenide / cadmium sulfide core-shell quantum dots (CdSe / CdS) modified with phenylthiol ligands, where the phenylthiol ligands include any one group or a combination of multiple groups of 3-(3-methylbutyl)-phenylmethanethiol, 3-(1-propylbutoxy)-phenylmethanethiol, 3-(dipropylcarbamoyl)-phenylmethanethiol, and 3-(dipropylamino)-phenylmethanethiol.

[0041] According to a second aspect of the present invention, a method for preparing an antibacterial and disinfection diffusion plate is provided, including the following steps:

[0042] Put polypropylene (PP) into a drying oven and dry it at 80 °C for 2 hours to remove moisture;

[0043] Pre-mix an antioxidant, a light stabilizer, and a dispersant uniformly to form an additive mixture;

[0044] Put the dried polypropylene (PP) and the additive mixture into a high-speed mixer and stir at a low speed (about 50 revolutions per minute) for 5 minutes to ensure preliminary uniform mixing and obtain a primary mixture;

[0045] Slowly add a light diffusing agent (barium sulfate), zinc oxide, titanium dioxide (TiO2) nanoparticles, silica aerogel microspheres, graphene quantum dots (GQDs), tourmaline powder, far-infrared ceramic powder, black phosphorus nanosheets (BPNS), and rare earth-doped upconversion materials to the primary mixture in sequence. After adding each component, stir at 150 revolutions per minute for 2 minutes to ensure sufficient mixing and obtain a secondary mixture;

[0046] Mix zeolite molecular sieve and plant extract uniformly, and then add them to the secondary mixture. Continue to stir at 150 revolutions per minute for 2 minutes to obtain a tertiary mixture;

[0047] Slowly add chitosan-modified silver nanoparticles and a phenylthiol ligand-modified quantum dot solution to the tertiary mixture, and continue to stir at a high speed for 5 minutes to ensure uniform distribution of all components and obtain a diffusion plate mixture;

[0048] Feed the diffusion plate mixture into a twin-screw extruder for shaping, and then cool and solidify the extrudate through a cooling device to form the antibacterial and disinfection diffusion plate.

[0049] According to an embodiment of the present invention, the extrusion temperature of the twin-screw extruder is 240-250 °C, and the rotation speed of the twin-screw extruder is 250-300 revolutions per minute.

[0050] According to an embodiment of the present invention, the preparation process of the phenylthiol ligand-modified quantum dot solution is as follows:

[0051] Dilute and dissolve the phenyl mercaptan ligand in n-octane solution with a concentration range of 0.1 - 1000 mg / mL;

[0052] Take 1 mL of cadmium selenide / cadmium sulfide core-shell quantum dot (CdSe / CdS) n-octane solution with a concentration of 1 - 100 mg / mL, and add 1 mL of the phenyl mercaptan ligand solution to obtain a mixture;

[0053] React at a constant temperature between 50 - 100 °C for 0.1 - 10 hours to allow the phenyl mercaptan ligand to preferentially coordinate on the surface of the cadmium selenide / cadmium sulfide core-shell quantum dot (CdSe / CdS);

[0054] Add 2 mL of high-purity ethanol to the above heated mixture to precipitate the quantum dots;

[0055] Separate the liquid and solid with a centrifuge and retain the solid quantum dots;

[0056] Redisperse the solid quantum dots in n-octane to prepare a quantum dot solution modified with phenyl mercaptan ligand.

[0057] According to the third aspect of the present invention, there is provided an application of an antibacterial and disinfection diffusion plate in disinfection lamps and household appliances.

[0058] According to the embodiments of the present invention, for example, the antibacterial and disinfection diffusion plate provided by the present invention can be used in places such as operating rooms, wards, or areas prone to bacterial growth such as kitchens and bathrooms, and can also be used for air purifier filters or indoor decorative panels.

[0059] Beneficial effects:

[0060] All the newly added components of the antibacterial and disinfection diffusion plate provided by the present invention are selected from materials friendly to the human body and the environment. In particular, the selection of natural plant extracts ensures the safety and comfort during use. Enhance the light diffusion performance: By adding silica aerogel microspheres, not only the light scattering effect is improved, but also the overall light transmittance and uniformity of the plate are increased.

[0061] All the newly added components are selected from materials friendly to the human body and the environment. In particular, the selection of natural plant extracts ensures the safety and comfort during use.

[0062] By introducing silica aerogel microspheres as a light diffusing agent, the light scattering effect of the material is significantly improved, making the light distribution more uniform and reducing the shadow and hot spot phenomena.

[0063] The combined use of zinc oxide, silver nanoparticles, and plant extracts (such as tea tree essential oil or eucalyptus oil) provides a multi-level antibacterial protection mechanism. In particular, using zeolite molecular sieve as a slow-release carrier can achieve the continuous release of antibacterial components for a long time, ensuring a long-term and effective air disinfection effect.

[0064] All newly added components are made of materials friendly to the human body and the environment. In particular, the selection of natural plant extracts ensures safety and comfort during use and will not cause any adverse effects on human health.

[0065] This light diffuser not only has the advantages of traditional products but also achieves significant technological progress in antibacterial disinfection, providing a fresher and healthier usage environment for users without affecting human health.

[0066] Strong adaptability: This improved light diffuser is particularly suitable for applications in places that require high hygiene standards, such as hospital operating rooms, school canteens, and household appliances (such as refrigerator lights), meeting the needs for high-quality light environments in different scenarios. Specific implementation manners

[0067] An embodiment of this application relates to an antibacterial and disinfection diffuser plate, its preparation method, and applications.

[0068] Example 1

[0069] Polypropylene: 67 parts

[0070] Light diffusing agent (barium sulfate): 5 parts

[0071] Antioxidant: 0.1 part

[0072] Light stabilizer: 0.1 part

[0073] Dispersant: 0.1 part

[0074] Zinc oxide: 2 parts

[0075] Quantum dots modified with phenylthiol ligands: 0.5 part

[0076] Titanium dioxide nanoparticles: 1 part

[0077] Silica aerogel microspheres: 1 part

[0078] Plant extract (tea tree essential oil): 0.5 part

[0079] Zeolite molecular sieve: 1 part

[0080] Graphene quantum dots: 0.5 part

[0081] Tourmaline powder: 1 part

[0082] Far-infrared ceramic powder: 1 part

[0083] Black phosphorus nanosheets: 0.1 part

[0084] Rare earth doped upconversion material (Ytterbium and erbium co-doped sodium yttrium fluoride): 0.2 parts of chitosan modified silver nanoparticles: 0.5 parts

[0085] Example 2

[0086] Polypropylene: 85 parts

[0087] Light diffusing agent (barium sulfate): 10 parts

[0088] Antioxidant: 0.5 parts

[0089] Light stabilizer: 0.3 parts

[0090] Dispersant: 1.0 part

[0091] Zinc oxide: 4 parts

[0092] Quantum dots modified with phenylthiol ligand: 1 part

[0093] Titanium dioxide nanoparticles: 2 parts

[0094] Silica aerogel microspheres: 3 parts

[0095] Plant extract (eucalyptus oil): 1 part

[0096] Zeolite molecular sieve: 2 parts

[0097] Graphene quantum dots: 1 part

[0098] Tourmaline powder: 2 parts

[0099] Far-infrared ceramic powder: 2 parts

[0100] Black phosphorus nanosheets: 0.5 part

[0101] Rare earth doped upconversion material (Ytterbium and erbium co-doped sodium yttrium fluoride): 1 part of chitosan modified silver nanoparticles: 1.5 parts

[0102] Example 3

[0103] Polypropylene: 75 parts

[0104] Light diffusing agent (barium sulfate): 7.5 parts

[0105] Antioxidant: 0.3 part

[0106] Light stabilizer: 0.2 part

[0107] Dispersant: 0.5 part

[0108] Zinc oxide: 3 parts

[0109] Quantum dots modified with phenylthiol ligand: 0.75 part

[0110] Titanium dioxide nanoparticles: 1.5 parts

[0111] Silica aerogel microspheres: 2 parts

[0112] Plant extract (tea tree essential oil): 0.75 parts

[0113] Zeolite molecular sieve: 1.5 parts

[0114] Graphene quantum dots: 0.75 parts

[0115] Tourmaline powder: 1.5 parts

[0116] Far-infrared ceramic powder: 1.5 parts

[0117] Black phosphorus nanosheets: 0.3 parts

[0118] Rare earth doped upconversion material (yttrium sodium fluoride co-doped with ytterbium and erbium): 0.6 parts Silver nanoparticles modified with chitosan: 1 part

[0119] Example 4

[0120] Polypropylene: 70 parts

[0121] Light diffusing agent (barium sulfate): 6 parts

[0122] Antioxidant: 0.2 parts

[0123] Light stabilizer: 0.15 parts

[0124] Dispersant: 0.3 parts

[0125] Zinc oxide: 2.5 parts

[0126] Quantum dots modified with phenylthiol ligand: 0.6 parts

[0127] Titanium dioxide nanoparticles: 1.2 parts

[0128] Silica aerogel microspheres: 1.5 parts

[0129] Plant extract (tea tree essential oil): 0.6 parts

[0130] Zeolite molecular sieve: 1.2 parts

[0131] Graphene quantum dots: 0.6 parts

[0132] Tourmaline powder: 1.2 parts

[0133] Far-infrared ceramic powder: 1.2 parts

[0134] Black phosphorus nanosheets: 0.2 parts

[0135] Rare earth doped upconversion material (yttrium sodium fluoride co-doped with ytterbium and erbium): 0.3 parts Silver nanoparticles modified with chitosan: 0.7 parts

[0136] Example 5

[0137] Polypropylene: 80 parts

[0138] Light diffusing agent (barium sulfate): 9 parts

[0139] Antioxidant: 0.4 part

[0140] Light stabilizer: 0.25 part

[0141] Dispersant: 0.8 part

[0142] Zinc oxide: 3.5 parts

[0143] Quantum dots modified with phenylthiol ligand: 0.9 part

[0144] Titanium dioxide nanoparticles: 1.8 parts

[0145] Silica aerogel microspheres: 2.5 parts

[0146] Plant extract (eucalyptus oil): 0.9 part

[0147] Zeolite molecular sieve: 1.8 parts

[0148] Graphene quantum dots: 0.9 part

[0149] Tourmaline powder: 1.8 parts

[0150] Far-infrared ceramic powder: 1.8 parts

[0151] Black phosphorus nanosheets: 0.4 part

[0152] Rare earth doped upconversion material (yttrium sodium fluoride co-doped with ytterbium and erbium): 0.8 part Silver nanoparticles modified with chitosan: 1.2 parts

[0153] Example 6

[0154] Polypropylene: 72 parts

[0155] Light diffusing agent (barium sulfate): 8 parts

[0156] Antioxidant: 0.35 part

[0157] Light stabilizer: 0.22 part

[0158] Dispersant: 0.6 part

[0159] Zinc oxide: 3.2 parts

[0160] Quantum dots modified with phenylthiol ligand: 0.8 part

[0161] Titanium dioxide nanoparticles: 1.6 parts

[0162] Silica aerogel microspheres: 2.2 parts

[0163] Plant extract (tea tree essential oil): 0.8 parts

[0164] Zeolite molecular sieve: 1.6 parts

[0165] Graphene quantum dots: 0.8 parts

[0166] Tourmaline powder: 1.6 parts

[0167] Far-infrared ceramic powder: 1.6 parts

[0168] Black phosphorus nanosheets: 0.35 parts

[0169] Rare earth doped upconversion material (Ytterbium and erbium co-doped sodium yttrium fluoride): 0.7 parts Silver nanoparticles modified with chitosan: 1.1 parts Comparative example 1 (compared with Example 3, lacking rare earth doped upconversion material) Polypropylene: 75 parts

[0170] Light diffusing agent (barium sulfate): 7.5 parts

[0171] Antioxidant: 0.3 parts

[0172] Light stabilizer: 0.2 parts

[0173] Dispersant: 0.5 parts

[0174] Zinc oxide: 3 parts

[0175] Quantum dots modified with phenylthiol ligand: 0.75 parts

[0176] Titanium dioxide nanoparticles: 1.5 parts

[0177] Silica aerogel microspheres: 2 parts

[0178] Plant extract (tea tree essential oil): 0.75 parts

[0179] Zeolite molecular sieve: 1.5 parts

[0180] Graphene quantum dots: 0.75 parts

[0181] Tourmaline powder: 1.5 parts

[0182] Far-infrared ceramic powder: 1.5 parts

[0183] Black phosphorus nanosheets: 0.3 parts

[0184] Silver nanoparticles modified with chitosan: 1 part Comparative example 2 (compared with Example 3, lacking graphene quantum dots) Polypropylene: 75 parts

[0185] Light diffusing agent (barium sulfate): 7.5 parts

[0186] Antioxidant: 0.3 parts

[0187] Light stabilizer: 0.2 parts

[0188] Dispersant: 0.5 parts

[0189] Zinc oxide: 3 parts

[0190] Quantum dots modified with phenyl mercaptan ligand: 0.75 parts

[0191] Titanium dioxide nanoparticles: 1.5 parts

[0192] Silica aerogel microspheres: 2 parts

[0193] Plant extract (tea tree essential oil): 0.75 parts

[0194] Zeolite molecular sieve: 1.5 parts

[0195] Tourmaline powder: 1.5 parts

[0196] Far-infrared ceramic powder: 1.5 parts

[0197] Black phosphorus nanosheets: 0.3 parts

[0198] Rare earth doped upconversion material (yttrium sodium fluoride co-doped with ytterbium and erbium): 0.6 parts Silver nanoparticles modified with chitosan: 1 part

[0199] Comparative Example 3 (compared with Example 3, lacking plant extract)

[0200] Polypropylene: 75 parts

[0201] Light diffusing agent (barium sulfate): 7.5 parts

[0202] Antioxidant: 0.3 parts

[0203] Light stabilizer: 0.2 parts

[0204] Dispersant: 0.5 parts

[0205] Zinc oxide: 3 parts

[0206] Quantum dots modified with phenyl mercaptan ligand: 0.75 parts

[0207] Titanium dioxide nanoparticles: 1.5 parts

[0208] Silica aerogel microspheres: 2 parts

[0209] Zeolite molecular sieve: 1.5 parts

[0210] Graphene quantum dots: 0.75 parts

[0211] Tourmaline powder: 1.5 parts

[0212] Far-infrared ceramic powder: 1.5 parts

[0213] Black phosphorus nanosheets: 0.3 parts

[0214] Rare earth doped upconversion material (Ytterbium-Erbium co-doped sodium yttrium fluoride): 0.6 parts Chitosan modified silver nanoparticles: 1 part

[0215] Comparative Example 4 (compared with Example 3, lacking far-infrared ceramic powder) Polypropylene: 75 parts

[0216] Light diffusing agent (barium sulfate): 7.5 parts

[0217] Antioxidant: 0.3 parts

[0218] Light stabilizer: 0.2 parts

[0219] Dispersant: 0.5 parts

[0220] Zinc oxide: 3 parts

[0221] Phenylthiol ligand modified quantum dots: 0.75 parts

[0222] Titanium dioxide nanoparticles: 1.5 parts

[0223] Silica aerogel microspheres: 2 parts

[0224] Plant extract (tea tree essential oil): 0.75 parts

[0225] Zeolite molecular sieve: 1.5 parts

[0226] Graphene quantum dots: 0.75 parts

[0227] Tourmaline powder: 1.5 parts

[0228] Black phosphorus nanosheets: 0.3 parts

[0229] Rare earth doped upconversion material (Ytterbium-Erbium co-doped sodium yttrium fluoride): 0.6 parts Chitosan modified silver nanoparticles: 1 part

[0230] Comparative Example 5 (compared with Example 3, lacking zinc oxide)

[0231] Polypropylene: 75 parts

[0232] Light diffusing agent (barium sulfate): 7.5 parts

[0233] Antioxidant: 0.3 parts

[0234] Light stabilizer: 0.2 parts

[0235] Dispersant: 0.5 parts

[0236] Phenylthiol ligand modified quantum dots: 0.75 parts

[0237] Titanium dioxide nanoparticles: 1.5 parts

[0238] Silica aerogel microspheres: 2 parts

[0239] Plant extract (tea tree essential oil): 0.75 parts

[0240] Zeolite molecular sieve: 1.5 parts

[0241] Graphene quantum dots: 0.75 parts

[0242] Tourmaline powder: 1.5 parts

[0243] Far-infrared ceramic powder: 1.5 parts

[0244] Black phosphorus nanosheets: 0.3 parts

[0245] Rare earth doped upconversion material (Ytterbium-Erbium co-doped sodium yttrium fluoride): 0.6 parts

[0246] Chitosan-modified silver nanoparticles: 1 part

[0247] Comparative Example 6 (compared with Example 3, lacking black phosphorus nanosheets)

[0248] Polypropylene: 75 parts

[0249] Light diffusing agent (barium sulfate): 7.5 parts

[0250] Antioxidant: 0.3 parts

[0251] Light stabilizer: 0.2 parts

[0252] Dispersant: 0.5 parts

[0253] Zinc oxide: 3 parts

[0254] Quantum dots modified with phenylthiol ligand: 0.75 parts

[0255] Titanium dioxide nanoparticles: 1.5 parts

[0256] Silica aerogel microspheres: 2 parts

[0257] Plant extract (tea tree essential oil): 0.75 parts

[0258] Zeolite molecular sieve: 1.5 parts

[0259] Graphene quantum dots: 0.75 parts

[0260] Tourmaline powder: 1.5 parts

[0261] Far-infrared ceramic powder: 1.5 parts

[0262] Rare earth doped upconversion material (Ytterbium-Erbium co-doped sodium yttrium fluoride): 0.6 parts

[0263] Chitosan-modified silver nanoparticles: 1 part

[0264] Experimental Example

[0265] The optical properties, antibacterial properties, air quality improvement properties, and mechanical properties of the diffusion plates prepared in Examples 1-6 and Comparative Examples 1-6 were measured by the following methods. The results are shown in Table 1. The test methods are as follows:

[0266] (1) Optical property test

[0267] 1. Light transmittance test:

[0268] The transmittance of the sample in the wavelength range of 400-800 nm was measured using a spectrophotometer, representing the percentage of light transmitted by the material in the wavelength range of 400-800 nm.

[0269] The sample thickness was 2 mm, and each experiment was repeated 3 times and the average value was taken.

[0270] 2. Light diffusion efficiency test:

[0271] The ratio of the scattered light intensity to the total light intensity of the sample was measured using an integrating sphere.

[0272] The sample thickness was 2 mm, and each experiment was repeated 3 times and the average value was taken.

[0273] (2) Antibacterial property test

[0274] Standard bacterial culture method:

[0275] Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were selected as the test bacterial strains.

[0276] The sample was placed on an agar plate containing the bacterial solution and incubated at 37 °C for 24 hours.

[0277] The diameter of the inhibition zone was measured. The diameter of the inhibition zone measured by the standard bacterial culture method (in millimeters) was for Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) respectively. Each experiment was repeated 3 times and the average value was taken.

[0278] (3) Air quality improvement test

[0279] 1. Negative ion release amount detection:

[0280] A negative ion detector was used to measure the negative ion concentration in the air around the sample.

[0281] The sample was placed in a closed environment, and the change in negative ion concentration at the initial stage and after 1 hour was recorded. Each experiment was repeated 3 times and the average value was taken, representing the negative ion concentration in the air around the sample (number of ions per cubic centimeter).

[0282] 2. Air purification effect test:

[0283] Use an air filter to simulate a polluted environment and measure the change in PM2.5 concentration.

[0284] Place the sample in the polluted environment, record the change in PM2.5 concentration at the initial stage and after 24 hours, repeat each group of experiments 3 times and take the average value, which represents the removal percentage of PM2.5 particles in the air by the sample.

[0285] (4) Mechanical property test

[0286] 1. Tensile strength test:

[0287] Conduct a tensile test using a universal material testing machine. The sample size is 100mm × 10mm × 2mm.

[0288] The tensile speed is 5mm / min, record the maximum stress at fracture, repeat each group of experiments 3 times and take the average value.

[0289] 2. Elongation at break test:

[0290] Also use a universal material testing machine to record the maximum strain at fracture, repeat each group of experiments 3 times and take the average value.

[0291] Table 1. Experimental detection data of Examples 1-6 and Comparative Examples 1-6 of the present invention

[0292]

[0293]

[0294] Based on the above experimental data, it can be seen that:

[0295] 1. Light transmittance:

[0296] The average light transmittance of the examples is 91.5%, while the average light transmittance of the comparative examples is 89.3%.

[0297] The examples generally have higher light transmittance, especially Example 4 (93%) and Example 5 (91%), indicating that adding various functional materials helps to improve the light transmittance.

[0298] 2. Light diffusion efficiency:

[0299] The average light diffusion efficiency of the examples is 87%, while the average light diffusion efficiency of the comparative examples is 83.3%.

[0300] The examples show better light diffusion efficiency, especially Example 5 (89%) and Example 3 (88%), which indicates that components such as silica aerogel microspheres play an important role in enhancing light scattering.

[0301] 3. Antibacterial Performance Analysis

[0302] The average diameter of the antibacterial zone of the example against Escherichia coli (E. coli) is 12.3 mm, and the average diameter of the antibacterial zone against Staphylococcus aureus (S. aureus) is 11.3 mm.

[0303] The average diameter of the antibacterial zone of the comparative example against E. coli is 9.8 mm, and the average diameter of the antibacterial zone against S. aureus is 9.0 mm.

[0304] The diameter of the antibacterial zone in the example is significantly larger than that in the comparative example, indicating that the synergistic effect of various antibacterial components (such as zinc oxide, silver nanoparticles, plant extracts, etc.) in the composite material enhances the antibacterial effect. In particular, Comparative Example 5 (lacking zinc oxide) shows the lowest diameter of the antibacterial zone (E. coli 7 mm, S. aureus 6 mm), indicating that zinc oxide plays a key role in antibacterial.

[0305] 4. Negative Ion Release Amount:

[0306] The average negative ion release amount of the example is 3116 ions / cm 3 , while the average negative ion release amount of the comparative example is 2750 ions / cm 3 .

[0307] The example shows a higher negative ion release amount, especially in Example 2 (3200 ions / cm 3 ) and Example 4 (3300 ions / cm 3 ). This indicates that components such as tourmaline powder contribute significantly to the release of negative ions.

[0308] 5. PM2.5 Removal Rate:

[0309] The average PM2.5 removal rate of the example is 62.5%, while the average PM2.5 removal rate of the comparative example is 55.8%.

[0310] The example shows a better air purification effect, especially in Example 2 (65%) and Example 4 (64%). This indicates that components such as far-infrared ceramic powder and tourmaline powder play an important role in improving the air purification effect.

[0311] 6. Tensile Strength:

[0312] The average tensile strength of the example is 47 MPa, while the average tensile strength of the comparative example is 45.2 MPa.

[0313] The examples showed higher tensile strength, especially in Example 5 (49 MPa) and Example 4 (48 MPa). This indicates that the overall physical stability of the composite material has been enhanced.

[0314] 7. Elongation at break:

[0315] The average elongation at break of the examples was 17%, while that of the comparative examples was 16%.

[0316] The examples showed slightly higher elongation at break, especially in Example 5 (19%) and Example 4 (18%). This indicates that the material has better ductility when stressed and is not easily brittle.

[0317] It can be seen from this that the examples are superior to the comparative examples in terms of light transmittance, light diffusion efficiency, antibacterial performance, air quality improvement, and mechanical properties, indicating that the synergistic effect between the components has significantly improved the comprehensive performance of the material.

[0318] Comparative Example 1 showed lower light transmittance and light diffusion efficiency, indicating that the rare earth doped upconversion material plays an important role in enhancing optical properties.

[0319] Comparative Example 2 showed slightly lower antibacterial effect and negative ion release amount, indicating that graphene quantum dots not only contribute to antibacterial but may also participate in negative ion generation.

[0320] Comparative Example 3 showed a significantly reduced antibacterial effect, indicating that natural plant extracts are one of the important antibacterial components.

[0321] Comparative Example 4 showed a lower PM2.5 removal rate, indicating that far-infrared ceramic powder makes an important contribution to air purification.

[0322] Comparative Example 5 showed the lowest inhibition zone diameter, indicating that zinc oxide is one of the main antibacterial components.

[0323] Comparative Example 6 showed slightly lower light diffusion efficiency and negative ion release amount, indicating that black phosphorus nanosheets play a certain role in enhancing light diffusion and negative ion generation.

[0324] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. An antibacterial disinfection diffusion plate, characterized in that: According to the mass percentage, it includes: Polypropylene: 67-85 parts; Light diffuser: 5-10 parts; Antioxidant: 0.1-0.5 parts; Light stabilizer: 0.1-0.3 parts; Dispersant: 0.1-1.0 parts; Zinc oxide: 2-4 parts; Phenylthiol ligand-modified quantum dots: 0.5 to 1 part; Titanium dioxide nanoparticles: 1-2 parts; Silica aerogel microspheres: 1-3 parts; Plant extract: 0.5-1 part; Zeolite molecular sieve: 1-2 parts; Graphene quantum dots: 0.5-1 part; Tourmaline powder: 1-2 parts; Far infrared ceramic powder: 1-2 parts; Black phosphorus nanosheets: 0.1-0.5 parts; Rare earth doped upconversion material: 0.2-1 part; Chitosan modified silver nanoparticles: 0.5 parts to 1.5 parts.

2. The antibacterial disinfection diffusion plate according to claim 1, characterized in that: The light diffuser is an inorganic light diffuser barium sulfate; The light stabilizer is a hindered amine light stabilizer; The dispersant is ethylene bisstearamide.

3. The antibacterial disinfection diffusion plate according to claim 1, characterized in that: The antioxidant is a compound of a phosphite antioxidant and a phenolic antioxidant; Wherein, the mass ratio of the phosphite antioxidant to the phenolic antioxidant is 1:

1.

4. The antibacterial disinfection diffusion plate according to claim 1, characterized in that: The plant extract is a natural plant extract, including one or both of tea tree essential oil and eucalyptus oil.

5. The antibacterial disinfection diffusion plate according to claim 1, characterized in that: The rare earth doped up-conversion material is ytterbium and erbium co-doped sodium yttrium fluoride; The doping amount of ytterbium is 20%-30mol%, and the doping amount of erbium is 1%-2mol%.

6. The antibacterial disinfection diffusion plate according to claim 1, characterized in that: The quantum dots modified with phenylthiol ligands are cadmium selenide / cadmium sulfide core-shell quantum dots modified with phenylthiol ligands, wherein the phenylthiol ligands include any one group or multiple combinations of 3-(3-methylbutyl)-phenylmethylthiol, 3-(1-propylbutoxy)-phenylmethylthiol, 3-(dipropylaminoformyl)-phenylmethylthiol, and 3-(dipropylamino)-phenylmethylthiol.

7. A method for preparing the antibacterial disinfection diffusion plate according to any one of claims 1 to 6, characterized in that: The following steps are involved: Place the polypropylene in a drying oven and dry it at 80°C for 2 hours to remove moisture; Premixing the antioxidant, light stabilizer and dispersant uniformly to form an additive mixture; Place the dried polypropylene and additive mixture into a high-speed mixer and stir at 50 rpm for 5 minutes to ensure initial uniform mixing to obtain a primary mixture; Slowly adding a light diffuser, zinc oxide, titanium dioxide nanoparticles, silicon dioxide aerogel microspheres, graphene quantum dots, tourmaline powder, far-infrared ceramic powder, black phosphorus nanosheets, and rare earth doped upconversion materials to the primary mixture in sequence, stirring at 150 rpm for 2 minutes after each component is added to ensure sufficient mixing, to obtain a secondary mixture; After the zeolite molecular sieve and the plant extract are evenly mixed, they are added to the secondary mixture and stirred at 150 rpm for 2 minutes to obtain a tertiary mixture; Slowly adding the chitosan-modified silver nanoparticles and the phenylthiol ligand-modified quantum dot solution into the three-stage mixture, and continuing to stir at a high speed for 5 minutes to ensure that all components are evenly distributed to obtain a diffusion plate mixture; After the diffusion plate mixture is fed into a twin-screw extruder for molding, the extrudate is cooled and solidified by a cooling device to form the antibacterial and disinfecting diffusion plate.

8. The preparation method according to claim 7, characterized in that: The extrusion temperature of the twin-screw extruder is 240-250° C., and the rotation speed of the twin-screw extruder is 250-300 rpm.

9. The preparation method according to claim 7, characterized in that: The preparation process of the phenylthiol ligand-modified quantum dot solution is as follows: The phenylthiol ligand was diluted and dissolved in n-octane solution in a concentration range of 0.1-1000 mg / mL; Take 1 mL of cadmium selenide / cadmium sulfide core-shell quantum dot n-octane solution with a concentration of 1-100 mg / mL, and add 1 mL of the phenylthiol ligand solution to obtain a mixed solution; The reaction is carried out at a constant temperature of 50-100° C. for 0.1-10 hours, so that the phenylthiol ligand is preferentially coordinated to the surface of the cadmium selenide / cadmium sulfide core-shell quantum dots; Add 2 mL of high-purity ethanol to the heated mixed solution to precipitate the quantum dots; Use a centrifuge to separate liquid and solid, retaining the solid quantum dots; The solid quantum dots are redispersed in n-octane to prepare a quantum dot solution modified with phenylthiol ligands.

10. Use of the antibacterial disinfection diffusion plate according to any one of claims 1 to 6 in disinfection lamps and household appliances.

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