Self-cleaning insect-proof antibacterial building material with nano titanium dioxide composite coating and preparation method of self-cleaning insect-proof antibacterial building material

Abstract

The invention relates to a self-cleaning insect-proof antibacterial building material with a nano titanium dioxide composite coating and a preparation method of the self-cleaning insect-proof antibacterial building material, and relates to the technical field of building materials, the self-cleaning insect-proof antibacterial building material comprises a base material and the nano titanium dioxide composite coating attached to the surface of the base material; the nano titanium dioxide composite coating comprises the following components in percentage by weight: 5-15% of modified nano titanium dioxide, 3-7% of fluorosilicone resin, 1-3% of an insect-resist agent, 1-5% of an antibacterial agent, 20-40% of an adhesive and the balance of an auxiliary agent; the modified nano titanium dioxide is obtained by sequentially carrying out microwave plasma treatment and silane coupling agent treatment on nano titanium dioxide. According to the self-cleaning, insect-preventing and antibacterial building material with the nano titanium dioxide composite coating provided by the invention, the preparation of a multifunctional building material with self-cleaning, insect-preventing and antibacterial functions is realized through the nano titanium dioxide composite coating, and the limitation of a single function of a traditional building material is broken through.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating and its preparation method. Background Technology

[0002] With the acceleration of urbanization and the continuous improvement of people's demands for quality of life, the performance and function of building materials, as a core component of buildings, are receiving increasing attention. While traditional building materials meet basic structural requirements, they often struggle to balance environmental friendliness, functional versatility, and long-term stability. Building surfaces are susceptible to dust, dirt, and microbial contamination, which not only affects aesthetics but may also pose a threat to the health of residents. Furthermore, pest infestations are a common and difficult-to-complete problem in building maintenance; their long-term presence not only damages the building structure but may also spread diseases.

[0003] Meanwhile, as people's demands for healthy living environments increase, insect-repellent and antibacterial functions have become an important direction for building material research and development. To address these issues, researchers and engineers are constantly exploring new building materials and their surface treatment technologies, aiming to achieve multi-functional building materials with self-cleaning, insect-repellent, and antibacterial properties. Therefore, developing a multi-functional building material with self-cleaning, insect-repellent, and antibacterial properties has become an urgent need in the industry. Summary of the Invention

[0004] To address the above problems, this invention provides a self-cleaning, insect-repellent, and antibacterial building material with a nano-titanium dioxide composite coating and its preparation method.

[0005] In a first aspect, the present invention provides a self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating, the self-cleaning, insect-proof, and antibacterial building material comprising a substrate and a nano-titanium dioxide composite coating attached to the surface of the substrate.

[0006] The nano-titanium dioxide composite coating comprises the following components by weight percentage:

[0007] Modified nano titanium dioxide 5-15%, fluorosilicone resin 3-7%, insect repellent 1-3%, antibacterial agent 1-5%, adhesive 20-40%, with the remainder being additives;

[0008] The modified nano-titanium dioxide is obtained by sequentially treating nano-titanium dioxide with microwave plasma and silane coupling agent.

[0009] Furthermore, by weight percentage, the nano-titanium dioxide composite coating comprises the following components:

[0010] The composition includes 10.5% modified nano-titanium dioxide, 5% fluorosilicone resin, 2% insect repellent, 3% antibacterial agent, 30% adhesive, and the remainder is additives.

[0011] Furthermore, the preparation method of the modified nano-titanium dioxide includes the following steps:

[0012] Nano-titanium dioxide was placed in the cavity of a microwave plasma device, and microwave plasma treatment was carried out for 1 to 3 minutes under atmospheric pressure open conditions, with a power of 300 to 500W and air as the working medium, to obtain the first nano-titanium dioxide.

[0013] The first nano-titanium dioxide and silane coupling agent KH550 were added to anhydrous ethanol and stirred and dispersed, then refluxed and centrifuged to dry, to obtain the modified nano-titanium dioxide.

[0014] Furthermore, the weight ratio of the first nano-titanium dioxide, the anhydrous ethanol, and the silane coupling agent KH550 is 10:(150-200):(1-3).

[0015] Furthermore, the operating conditions for the reflux include: a temperature of 90–95°C and a time of 30–60 minutes.

[0016] Furthermore, the insect repellent includes at least one of azadirachtin and pyrethroids.

[0017] Furthermore, the antibacterial agent includes at least one of ZnO and nano Ag, and the substrate includes at least one of concrete slab and ceramic brick.

[0018] Furthermore, the adhesive comprises at least one of waterborne polyurethane and silica sol; the additive comprises a dispersant, the dispersant comprising polyethylene glycol, and the fluorosilicone resin comprises fluorosilicone resin LS-8722; the coating thickness is 1-10 μm, and the particle size of the nano-titanium dioxide is 40-80 nm.

[0019] In a second aspect, the present invention provides a method for preparing a self-cleaning, insect-repellent, and antibacterial building material with a nano-titanium dioxide composite coating as described in any one of the first aspects, the preparation method comprising the following steps:

[0020] Modified nano-titanium dioxide, fluorosilicone resin, insect repellent, antibacterial agent, adhesive and additives are stirred to obtain a coating.

[0021] The coating is applied to the surface of a substrate and then cured to obtain a self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating.

[0022] Furthermore, the curing working conditions include: a temperature of 50–70°C and a time of 2–3 hours.

[0023] The technical solutions provided in the embodiments of the present invention have at least the following advantages compared with the prior art:

[0024] This invention provides a self-cleaning, insect-repellent, and antibacterial building material with a nano-titanium dioxide composite coating and its preparation method. This invention provides a self-cleaning, insect-repellent, and antibacterial building material with a nano-titanium dioxide composite coating, achieving the preparation of a multifunctional building material that combines self-cleaning, insect-repellent, and antibacterial properties, breaking through the limitations of traditional building materials with only a single function. Specifically:

[0025] 1. Synergistic mechanism of modified nano-titanium dioxide

[0026] Microwave plasma treatment: Introducing oxygen vacancies and low-valence titanium oxides through plasma bombardment expands the visible light response range; at the same time, plasma treatment reduces particle agglomeration, increases specific surface area, and increases the exposure of active sites.

[0027] Silane coupling agent modification: Silane coupling agents react with hydroxyl groups on the surface of titanium dioxide to form an organic coating layer, which improves its dispersibility and stability in fluorosilicone resins and its compatibility with resin substrates, reducing the risk of coating cracking.

[0028] 2. This invention utilizes the photocatalytic properties of nano-titanium dioxide, combined with the synergistic effects of fluorosilicone resin, insect repellent, and antibacterial agents, to construct a multifunctional intelligent building material integrating self-cleaning, insect repellency, and antibacterial properties. Its technical principle is based on the photochemical activity of nanomaterials and the functional complementarity of multiple components, breaking through the functional limitations of traditional building materials and providing innovative solutions for green building and long-term maintenance. Detailed Implementation

[0029] To make the objectives, 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. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0031] It should be noted that, unless otherwise specified or described, the raw materials involved in the self-cleaning, insect-repellent, and antibacterial building material with nano-titanium dioxide composite coating and its preparation method provided in the embodiments of the present invention can be directly made from commercially available products or by using existing publicly disclosed preparation methods; at the same time, unless otherwise specified or described, the steps and parameters involved can be carried out according to the existing processing technology of self-cleaning, insect-repellent, and antibacterial building materials with nano-titanium dioxide composite coating or directly using existing equipment, and will not be described in detail in this document.

[0032] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Experimental methods in the following embodiments, unless otherwise specified, are generally performed according to national standards. If no corresponding national standard exists, then generally accepted international standards, conventional conditions, or conditions recommended by the manufacturer are followed.

[0033] Example 1

[0034] This example provides a self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating. The self-cleaning, insect-proof, and antibacterial building material includes a substrate and a nano-titanium dioxide composite coating attached to the surface of the substrate.

[0035] The nano-titanium dioxide composite coating comprises the following components by weight percentage:

[0036] The composition includes 10.5% modified nano-titanium dioxide, 5% fluorosilicone resin, 2% insect repellent, 3% antibacterial agent, 30% adhesive, and the remainder being additives.

[0037] The substrate is a ceramic brick;

[0038] The thickness of the nano-titanium dioxide composite coating on the substrate surface is 5 μm;

[0039] The modified nano-titanium dioxide is obtained by sequentially treating nano-titanium dioxide with microwave plasma and silane coupling agent. The preparation method includes the following steps: placing nano-titanium dioxide in the cavity of a microwave plasma device, using an open atmospheric pressure environment, setting the power to 400W and using air as the working medium, and performing microwave plasma treatment for 2 minutes to obtain the first nano-titanium dioxide; adding the first nano-titanium dioxide and silane coupling agent KH550 to anhydrous ethanol for stirring and dispersion, followed by reflux and centrifugal drying to obtain the modified nano-titanium dioxide; wherein, the weight ratio of the first nano-titanium dioxide, the anhydrous ethanol, and the silane coupling agent KH550 is 10:175:2; the reflux working conditions include: temperature of 92℃ and time of 45 minutes;

[0040] The fluorosilicone resin is fluorosilicone resin LS-8722;

[0041] The insecticide is pyrethroid;

[0042] The antibacterial agent is ZnO powder;

[0043] The adhesive is water-based polyurethane PU-550;

[0044] The additive is polyethylene glycol.

[0045] The preparation method of the above-mentioned self-cleaning, insect-proof, and antibacterial building material with nano-titanium dioxide composite coating includes the following steps:

[0046] Modified nano-titanium dioxide, fluorosilicone resin, insect repellent, antibacterial agent, adhesive and additives are stirred to obtain a coating.

[0047] The coating is applied to the surface of a substrate and then cured to obtain a self-cleaning, insect-proof, and antibacterial building material with the nano-titanium dioxide composite coating.

[0048] The curing working conditions include: a temperature of 60°C and a time of 2.5 hours.

[0049] The self-cleaning, insect-repellent, and antibacterial building material obtained in this example has a water contact angle of 161°, an antibacterial rate of 99.7%, a cockroach repellency rate of 91%, and adhesion (0 grade in cross-cut test), demonstrating excellent self-cleaning, insect-repellent, and antibacterial properties.

[0050] Example 2

[0051] This example provides a self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating. The self-cleaning, insect-proof, and antibacterial building material includes a substrate and a nano-titanium dioxide composite coating attached to the surface of the substrate.

[0052] The nano-titanium dioxide composite coating comprises the following components by weight percentage:

[0053] Modified nano titanium dioxide 5%, fluorosilicone resin 3%, insect repellent 1%, antibacterial agent 1%, adhesive 20%, with the remainder being additives;

[0054] The substrate is a ceramic brick;

[0055] The thickness of the nano-titanium dioxide composite coating on the substrate surface is 5 μm;

[0056] The modified nano-titanium dioxide is obtained by sequentially treating nano-titanium dioxide with microwave plasma and silane coupling agent. The preparation method includes the following steps: placing nano-titanium dioxide in the cavity of a microwave plasma device, using an open atmospheric pressure environment, setting the power to 400W and using air as the working medium, and performing microwave plasma treatment for 2 minutes to obtain the first nano-titanium dioxide; adding the first nano-titanium dioxide and silane coupling agent KH550 to anhydrous ethanol for stirring and dispersion, followed by reflux and centrifugal drying to obtain the modified nano-titanium dioxide; wherein, the weight ratio of the first nano-titanium dioxide, the anhydrous ethanol, and the silane coupling agent KH550 is 10:175:2; the reflux working conditions include: temperature of 92℃ and time of 45 minutes;

[0057] The fluorosilicone resin is fluorosilicone resin LS-8722;

[0058] The insecticide is pyrethroid;

[0059] The antibacterial agent is ZnO powder;

[0060] The adhesive is water-based polyurethane PU-550;

[0061] The additive is polyethylene glycol.

[0062] The preparation method of the above-mentioned self-cleaning, insect-proof, and antibacterial building material with nano-titanium dioxide composite coating includes the following steps:

[0063] Modified nano-titanium dioxide, fluorosilicone resin, insect repellent, antibacterial agent, adhesive and additives are stirred to obtain a coating.

[0064] The coating is applied to the surface of a substrate and then cured to obtain a self-cleaning, insect-proof, and antibacterial building material with the nano-titanium dioxide composite coating.

[0065] The curing working conditions include: a temperature of 60°C and a time of 2.5 hours.

[0066] The self-cleaning, insect-repellent, and antibacterial building material obtained in this example has a water contact angle of 151°, an antibacterial rate of 86.2%, a cockroach repellency rate of 84%, and adhesion (0 grade in cross-cut test), demonstrating excellent self-cleaning, insect-repellent, and antibacterial properties.

[0067] Example 3

[0068] This example provides a self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating. The self-cleaning, insect-proof, and antibacterial building material includes a substrate and a nano-titanium dioxide composite coating attached to the surface of the substrate.

[0069] The nano-titanium dioxide composite coating comprises the following components by weight percentage:

[0070] The composition includes 15% modified nano-titanium dioxide, 7% fluorosilicone resin, 3% insect repellent, 5% antibacterial agent, 40% adhesive, and the remainder being additives.

[0071] The substrate is a ceramic brick;

[0072] The thickness of the nano-titanium dioxide composite coating on the substrate surface is 5 μm;

[0073] The modified nano-titanium dioxide is obtained by sequentially treating nano-titanium dioxide with microwave plasma and silane coupling agent. The preparation method includes the following steps: placing nano-titanium dioxide in the cavity of a microwave plasma device, using an open atmospheric pressure environment, setting the power to 400W and using air as the working medium, and performing microwave plasma treatment for 2 minutes to obtain the first nano-titanium dioxide; adding the first nano-titanium dioxide and silane coupling agent KH550 to anhydrous ethanol for stirring and dispersion, followed by reflux and centrifugal drying to obtain the modified nano-titanium dioxide; wherein, the weight ratio of the first nano-titanium dioxide, the anhydrous ethanol, and the silane coupling agent KH550 is 10:175:2; the reflux working conditions include: temperature of 92℃ and time of 45 minutes;

[0074] The fluorosilicone resin is fluorosilicone resin LS-8722;

[0075] The insecticide is pyrethroid;

[0076] The antibacterial agent is ZnO powder;

[0077] The adhesive is water-based polyurethane PU-550;

[0078] The additive is polyethylene glycol.

[0079] The preparation method of the above-mentioned self-cleaning, insect-proof, and antibacterial building material with nano-titanium dioxide composite coating includes the following steps:

[0080] Modified nano-titanium dioxide, fluorosilicone resin, insect repellent, antibacterial agent, adhesive and additives are stirred to obtain a coating.

[0081] The coating is applied to the surface of a substrate and then cured to obtain a self-cleaning, insect-proof, and antibacterial building material with the nano-titanium dioxide composite coating.

[0082] The curing working conditions include: a temperature of 60°C and a time of 2.5 hours.

[0083] The self-cleaning, insect-repellent, and antibacterial building material obtained in this example has a water contact angle of 155°, an antibacterial rate of 99.2%, a cockroach repellency rate of 92%, and adhesion (0 grade in cross-cut test), demonstrating excellent self-cleaning, insect-repellent, and antibacterial properties.

[0084] Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a hard limitation on the scope of the invention; therefore, it should be considered that the range description has specifically disclosed all possible subranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Furthermore, whenever a numerical range is referred to herein, it means including any referenced number (fraction or integer) within the range referred to.

[0085] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A self-cleaning, insect-repellent, and antibacterial building material with a nano-titanium dioxide composite coating, characterized in that, The self-cleaning, insect-proof, and antibacterial building material includes a substrate and a nano-titanium dioxide composite coating attached to the surface of the substrate. The nano-titanium dioxide composite coating comprises the following components by weight percentage: Modified nano titanium dioxide 5-15%, fluorosilicone resin 3-7%, insect repellent 1-3%, antibacterial agent 1-5%, adhesive 20-40%, with the remainder being additives; The modified nano-titanium dioxide is obtained by sequentially treating nano-titanium dioxide with microwave plasma and silane coupling agent.

2. The self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating according to claim 1, characterized in that, The nano-titanium dioxide composite coating comprises the following components by weight percentage: The composition includes 10.5% modified nano-titanium dioxide, 5% fluorosilicone resin, 2% insect repellent, 3% antibacterial agent, 30% adhesive, and the remainder is additives.

3. The self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating according to claim 1, characterized in that, The preparation method of the modified nano-titanium dioxide includes the following steps: Nano-titanium dioxide was placed in the cavity of a microwave plasma device, and microwave plasma treatment was carried out for 1 to 3 minutes under atmospheric pressure open conditions, with a power of 300 to 500W and air as the working medium, to obtain the first nano-titanium dioxide. The first nano-titanium dioxide and silane coupling agent KH550 were added to anhydrous ethanol and stirred and dispersed, then refluxed and centrifuged to dry, to obtain the modified nano-titanium dioxide.

4. The self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating according to claim 3, characterized in that, The weight ratio of the first nano-titanium dioxide, the anhydrous ethanol and the silane coupling agent KH550 is 10:(150-200):(1-3).

5. The self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating according to claim 3, characterized in that, The operating conditions for the reflux include: a temperature of 90–95°C and a time of 30–60 minutes.

6. The self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating according to claim 1, characterized in that, The insect repellent includes at least one of azadirachtin and pyrethroids.

7. The self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating according to claim 1, characterized in that, The antibacterial agent includes at least one of ZnO and nano Ag, and the substrate includes at least one of concrete slab and ceramic brick.

8. The self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating according to claim 1, characterized in that, The adhesive comprises at least one of waterborne polyurethane and silica sol; the additives include dispersants, the dispersants include polyethylene glycol, and the fluorosilicone resin includes fluorosilicone resin LS-8722; the coating thickness is 1-10 μm.

9. A method for preparing a self-cleaning, insect-repellent, and antibacterial building material with a nano-titanium dioxide composite coating as described in any one of claims 1 to 8, characterized in that, The preparation method includes the following steps: Modified nano-titanium dioxide, fluorosilicone resin, insect repellent, antibacterial agent, adhesive and additives are stirred to obtain a coating. The coating is applied to the surface of a substrate and then cured to obtain a self-cleaning, insect-proof, and antibacterial building material with a nano-titanium dioxide composite coating.

10. The method for preparing the self-cleaning, insect-proof, and antibacterial building material with nano-titanium dioxide composite coating according to claim 9, characterized in that, The curing working conditions include: temperature of 50-70℃ and time of 2-3 hours.