Nano-silver ion composite UV antibacterial wood floor and preparation method thereof

Abstract

The invention discloses a nano-silver ion composite UV antibacterial wood floor and a preparation method thereof. The nano-silver ion composite UV antibacterial wood floor comprises a wood floor base material and a composite coating coated on the surface of the wood floor base material, the composite coating is composed of the following components in percentage by mass: 40-65% of UV acrylic resin; 3-8% of a photoinitiator; 5-15% of a nano silver ion dispersion liquid; 0.5-2% of an organosilicon leveling agent; 2-8% of a nano silicon dioxide delustering agent; and the balance of solvent. According to the invention, nano-silver ions and a UV coating system are organically combined, and a specific dispersion process is adopted to solve the problem of metal particle agglomeration; the obtained product has high-efficiency broad-spectrum antibacterial property while maintaining the original mechanical properties of the wood floor.

Description

Technical Field

[0001] The invention relates to the technical field of antibacterial wood flooring, in particular to a nano silver ion composite UV antibacterial wood flooring and a preparation method thereof. Background Art

[0002] There are many types of flooring. By structure, there are solid wood flooring, engineered wood flooring, impregnated paper laminated wood flooring (laminate flooring), bamboo flooring, and cork flooring. By application, there are residential flooring, commercial flooring, anti-static flooring, outdoor flooring, stage and dance flooring, and sports flooring. By environmental rating, there are E1-rated flooring, E0-rated flooring, and JAS F4-rated flooring. These types of flooring are primarily finished in three ways: paint, which is used on solid wood flooring, engineered wood flooring, and bamboo flooring; melamine-impregnated paper finish, which is used on laminate flooring and impregnated paper laminated wood flooring; and oil-wax finishes (including natural plant oils and synthetic oils), which are used on solid wood flooring and engineered wood flooring. As a flooring decoration material, wood flooring is often used in relatively unhygienic environments, making it susceptible to bacterial growth. Therefore, we propose a nano-silver ion composite UV antibacterial wood flooring and its preparation method. The invention is mainly used for the finishing treatment of solid wood floors and solid wood composite floors. Summary of the Invention

[0003] The purpose of the present invention is to provide a nano silver ion composite UV antibacterial wood floor and a preparation method thereof, so as to solve the problems in the prior art.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a nano-silver ion composite UV antibacterial wood floor, comprising a wood floor substrate and a composite coating coated on the surface; the composite coating is composed of the following components in percentage by weight: 40-65% UV acrylic resin; 3-8% photoinitiator; 5-15% nano-silver ion dispersion; 0.5-2% organosilicon leveling agent; 2-8% nano-silicon dioxide matting agent; and the balance is solvent.

[0005] Preferably, the solvent is propylene glycol methyl ether acetate solvent.

[0006] Preferably, the photoinitiator is TPO / TPO-L.

[0007] Preferably, the concentration of the nano silver ion dispersion is 500-2000 ppm; the particle size of the nano silver ions in the nano silver ion dispersion is 10-50 nm.

[0008] Preferably, the wooden floor substrate is a pure solid wood baseboard or a solid wood composite wood baseboard.

[0009] A method for preparing a nano-silver ion composite UV antibacterial wood floor comprises the following steps:

[0010] S1, ultrasonically treating the nanosilver ion dispersion and the solvent for 30-60 min;

[0011] S2, add UV acrylic resin, photoinitiator, silicone leveling agent and nano-silica matting agent in sequence and disperse at high speed;

[0012] S3, applying the coating to the wood floor substrate using a micro-gravure coating process;

[0013] S4, UV curing.

[0014] Preferably, the ultrasonic frequency of the ultrasonic treatment in S1 is 40 kHz.

[0015] Preferably, the rotation speed of the high-speed dispersion in S2 is 1500-3000 rpm.

[0016] Preferably, the wet film thickness of the coating in S3 is 15-25 μm.

[0017] Preferably, the UV curing energy in S4 is 800-1200 mJ / cm² and the main wavelength is 365 nm.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By organically combining nano-silver ions with the UV coating system and adopting a specific dispersion process to solve the problem of metal particle agglomeration, the resulting product not only maintains the original mechanical properties of the wood floor but also has high-efficiency and broad-spectrum antibacterial properties.

[0020] 2. Micro-gravure coating process achieves precise coating control of ≤5μm.

[0021] 3. The organic-inorganic composite antibacterial system achieves 72 hours of continuous antibacterial effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0025] See also Figure 1 In an embodiment of the present invention, a nano-silver ion composite UV antibacterial wood floor includes a wood floor substrate and a composite coating coated on the surface; the composite coating is composed of the following components in percentage by weight: UV acrylic resin 40-65%; photoinitiator 3-8%; nano-silver ion dispersion 5-15%; silicone leveling agent 0.5-2%; nano-silicon dioxide matting agent 2-8%; the balance is solvent.

[0026] Preferably, the solvent is propylene glycol methyl ether acetate solvent.

[0027] Preferably, the photoinitiator is TPO / TPO-L.

[0028] Preferably, the concentration of the nano silver ion dispersion is 500-2000 ppm; the particle size of the nano silver ions in the nano silver ion dispersion is 10-50 nm.

[0029] Preferably, the wooden floor substrate is a solid wood baseboard or a composite wood baseboard.

[0030] A method for preparing a nano-silver ion composite UV antibacterial wood floor comprises the following steps:

[0031] S1. Ultrasonicate the silver nanoparticles in the solvent at a frequency of 40 kHz for 30-60 minutes to disperse the silver nanoparticles uniformly in the solvent and prevent agglomeration. The ultrasonication frequency is 40 kHz and the duration is controlled between 30 and 60 minutes to ensure that the nanoparticles are fully dispersed.

[0032] S2. Add UV acrylic resin, photoinitiator, silicone leveling agent and nano-silica matting agent in sequence and disperse at high speed; the speed of high-speed dispersion is 1500-3000rpm; add UV resin, photoinitiator and other additives to the dispersed nano-silver solution in sequence, and use high-speed dispersion technology (speed 1500-3000rpm) to further mix evenly to ensure the consistency and stability of the final coating.

[0033] S3. Apply the coating to the wood flooring substrate using a micro-gravure coating process; the coating is applied to a wet film thickness of 15-25μm to achieve the desired coverage and subsequent performance after curing;

[0034] S4, UV curing; UV curing energy is 800-1200mJ / cm², and the dominant wavelength is 365nm. UV light irradiation provides sufficient energy (800-1200mJ / cm²) to decompose the photoinitiator in the coating, generating free radicals or cations, which trigger the polymerization reaction of the UV resin and quickly cure to form a hard protective layer. The dominant wavelength is 365nm because it effectively activates most photoinitiators.

[0035] The working principle of the present invention is to ultrasonically treat a nanosilver ion dispersion and a solvent for 30-60 minutes at a frequency of 40 kHz. The nanosilver ions are dispersed and evenly distributed in the solvent to prevent agglomeration. The ultrasonic frequency is 40 kHz, and the duration is controlled between 30 and 60 minutes to ensure sufficient dispersion of the nanoparticles. A UV acrylic resin, a photoinitiator, an organosilicon leveling agent, and a nanosilica matting agent are then sequentially added and dispersed at a high speed of 1500-3000 rpm. The UV resin, photoinitiator, and other additives are then sequentially added to the dispersed nanosilver solution and further mixed using a high-speed dispersion technique (at a speed of 1500-3000 rpm) to ensure the consistency and stability of the final coating. The coating is applied to the wood flooring substrate using a micro-gravure coating process. A wet film thickness of 15-25μm is achieved to achieve optimal coverage and subsequent curing performance. UV curing is achieved using a UV curing energy of 800-1200mJ / cm² and a dominant wavelength of 365nm. UV light irradiation provides sufficient energy (800-1200mJ / cm²) to decompose the photoinitiator in the coating, generating free radicals or cations, which trigger polymerization of the UV resin, rapidly curing to form a hard protective layer. The dominant wavelength of 365nm was chosen because it effectively activates most photoinitiators. By organically combining nanosilver ions with the UV coating system and employing a specific dispersion process to address metal particle agglomeration, the resulting product maintains the original mechanical properties of the wood flooring while also exhibiting high-efficiency, broad-spectrum antimicrobial properties.

[0036] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A nano silver ion composite UV antibacterial wood floor, characterized in that: The invention comprises a wooden floor substrate and a composite coating applied on the surface; the composite coating is composed of the following components in percentage by mass: 40-65% UV acrylic resin; 3-8% photoinitiator; 5-15% nano silver ion dispersion; 0.5-2% organosilicon leveling agent; 2-8% nano silicon dioxide matting agent; and the balance is solvent.

2. The nano silver ion composite UV antibacterial wood floor according to claim 1, characterized in that: The solvent is propylene glycol methyl ether acetate solvent.

3. The nano silver ion composite UV antibacterial wood floor according to claim 1, characterized in that: The photoinitiator is TPO / TPO-L.

4. The nano silver ion composite UV antibacterial wood floor according to claim 1, characterized in that: The concentration of the nano silver ion dispersion is 500-2000ppm; the particle size of the nano silver ions in the nano silver ion dispersion is 10-50nm.

5. The nano silver ion composite UV antibacterial wood floor according to claim 1, characterized in that: The wooden floor substrate is a solid wood bottom board or a composite wood bottom board.

6. The method for preparing a nano silver ion composite UV antibacterial wood floor according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, ultrasonically treating the nanosilver ion dispersion and the solvent for 30-60 min; S2, add UV acrylic resin, photoinitiator, silicone leveling agent and nano-silica matting agent in sequence and disperse at high speed; S3, applying the coating to the wood floor substrate using a micro-gravure coating process; S4, UV curing.

7. The method for preparing a nano silver ion composite UV antibacterial wood floor according to claim 6, characterized in that: The ultrasonic frequency of the ultrasonic treatment in S1 is 40 kHz.

8. The method for preparing a nano silver ion composite UV antibacterial wood floor according to claim 6, characterized in that: The rotation speed of the high-speed dispersion in S2 is 1500-3000 rpm.

9. The method for preparing a nano silver ion composite UV antibacterial wood floor according to claim 6, characterized in that: The wet film thickness of the coating in S3 is 15-25 μm.

10. The method for preparing a nano silver ion composite UV antibacterial wood floor according to claim 6, characterized in that: The UV curing energy in the S4 is 800-1200mJ / cm² and the main wavelength is 365nm.

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