Snake climbing prevention coating for power transmission tower and preparation method

Abstract

The embodiment of the invention provides a power transmission tower snake climbing prevention coating and a preparation method, and the method comprises the following steps: respectively blending a base material, a functional filler, a photocatalyst and an auxiliary agent which are prepared in advance according to a preset proportion to obtain bottom layer slurry, middle layer slurry and surface layer slurry, and sequentially mixing the bottom layer slurry, the middle layer slurry and the surface layer slurry; the bottom layer slurry, the middle layer slurry and the surface layer slurry are sequentially sprayed to the surface of a base material to be cured, a coating is obtained and cut into modular patches, a magnetic material is preset on the edge of each patch, and the anti-climbing coating is obtained. By means of the method, active snake repelling is achieved, the snake repelling efficiency is improved, the service life is prolonged, and environmental pollution is avoided.

Description

Technical Field

[0001] This application relates to the field of anti-climbing technology, and in particular to an anti-snake climbing coating for power transmission towers and a preparation method thereof. Background Technology

[0002] With the continuous development of power systems, the safe operation of transmission towers is crucial. Snakes climbing these towers can cause short circuits and other safety accidents, threatening the stable operation of the power system. In recent years, with the interdisciplinary development of materials science, chemical engineering, and other disciplines, snake-repellent technology has gradually moved towards greater intelligence, multifunctionality, and environmental friendliness. Researchers are beginning to focus on how to achieve active snake repellency, self-cleaning, and durable protective effects through innovative material formulations and release mechanisms.

[0003] In existing technologies, polytetrafluoroethylene (PTFE) is typically used as an anti-snake coating, utilizing its smooth surface to prevent snakes from climbing. Alternatively, barbed structures are used to prevent snakes from climbing power transmission towers. The barbs physically block the snakes from continuing to climb.

[0004] However, the above methods have a limited lifespan, generate harmful substances during use, pollute the environment, and the barbed structure is relatively complex to install and maintain, and has limited repellency against snakes, failing to actively deter snakes from approaching. Summary of the Invention

[0005] This application provides an anti-snake climbing coating for power transmission towers and a preparation method thereof, in order to solve the problem of how to actively repel snakes and avoid environmental pollution.

[0006] In a first aspect, embodiments of this application provide an anti-snake-climbing coating for power transmission towers, the coating comprising 40% matrix material, 25% functional filler, 10% photocatalyst and 25% auxiliary agent;

[0007] The coating has a multi-layer composite structure, including a base layer, an intermediate layer, and a surface layer;

[0008] The bottom layer is a biodegradable adhesive layer used to enhance the adhesion between the coating and the tower surface;

[0009] The intermediate layer is a snake-repelling functional layer, containing the aforementioned functional filler;

[0010] The surface layer is a photocatalytic self-cleaning layer containing the photocatalyst.

[0011] In one possible implementation, the coating is a modular patch structure with magnetic adsorption layers at the edges for adsorption onto the tower surface.

[0012] In one possible implementation, the matrix material is biodegradable polyurethane.

[0013] In one possible implementation, the functional filler is mesoporous silica-supported sulfur.

[0014] In one possible implementation, the photocatalyst is titanium dioxide nanoparticles.

[0015] In one possible implementation, the auxiliary agent includes a dispersant, a thickener, and a UV stabilizer.

[0016] In one possible implementation, the drug loading of the functional filler is 15%.

[0017] In one possible implementation, the sulfur is loaded into the mesoporous channels of the silica through both physical adsorption and chemical bonding.

[0018] Secondly, embodiments of this application provide a method for preparing an anti-snake-climbing coating for power transmission towers, including:

[0019] The pre-prepared matrix material, functional filler, photocatalyst and auxiliary agent are mixed in a preset ratio to obtain bottom layer slurry, intermediate layer slurry and surface layer slurry. The matrix material is biodegradable polyurethane, the functional filler is mesoporous silica supported sulfur, the photocatalyst is titanium dioxide nanoparticles, and the auxiliary agent includes dispersant, thickener and anti-ultraviolet agent.

[0020] In sequence, the bottom layer slurry, the intermediate layer slurry, and the top layer slurry are sprayed onto the substrate surface and cured to obtain a coating. The coating comprises 40% of the matrix material, 25% of the functional filler, 10% of the photocatalyst, and 25% of the auxiliary agent.

[0021] The coating is cut into modular patches, and magnetic material is pre-placed on the edge of each patch to obtain an anti-climb coating.

[0022] In one possible implementation, the method further includes:

[0023] The mesoporous silica is mixed with the sulfur, and the sulfur is uniformly loaded into the mesoporous channels of silica by ball milling to obtain the functional filler.

[0024] The anti-snake-climbing coating and preparation method for transmission towers provided in this application embodiment involves mixing pre-prepared matrix materials, functional fillers, photocatalysts, and auxiliary agents in preset proportions to obtain a base slurry, an intermediate slurry, and a surface slurry. These are then sequentially sprayed onto the substrate surface and cured to obtain a coating. The coating is then cut into modular patches, and magnetic material is pre-placed at the edge of each patch to obtain the anti-climbing coating. This method achieves active snake repellency, improves snake repellency efficiency, extends service life, and avoids environmental pollution. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0026] Figure 1 A schematic flowchart illustrating the method for preparing the anti-snake-climbing coating for power transmission towers provided in this application.

[0027] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0028] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0029] With the continuous development of power systems, the safe operation of transmission towers is of paramount importance. Snakes climbing transmission towers may cause safety accidents such as short circuits, threatening the stable operation of power systems. Traditional snake-proof devices mostly rely on physical structures, such as smooth coatings and barbs, but they suffer from problems such as easy aging, environmental pollution, and easy failure in severe weather conditions such as rain. Furthermore, they lack active avoidance functions and cannot meet the long-term, stable, and environmentally friendly protection requirements.

[0030] In recent years, with the interdisciplinary development of materials science, chemical engineering, and other fields, snake repellent technology has gradually moved towards greater intelligence, multifunctionality, and environmental friendliness. Researchers have begun to focus on how to achieve active snake repellency, self-cleaning, and durable protective effects through innovative material formulations and release mechanisms. On the one hand, the development of novel nanomaterials has made it possible to achieve sustained release of snake repellent components, enabling snake repellents to be released in a controlled manner over a long period, thus enhancing the persistence of the snake repellent effect. On the other hand, the application of self-cleaning technologies such as photocatalytic materials has effectively solved the problem of pollutant accumulation on coating surfaces, extending the service life of the coating. At the same time, the selection of environmentally friendly materials has become an important trend in this field, aiming to reduce the impact on ecosystems.

[0031] Existing technology one uses polytetrafluoroethylene (PTFE) as a snake-repellent coating, relying on its smooth surface to prevent snakes from climbing. While this coating offers some snake-repellent effect, it primarily relies on physical anti-slip mechanisms. In inclement weather such as rain, the surface may become slippery, reducing its effectiveness. Furthermore, the PTFE coating has a limited lifespan, typically 2-3 years, and may release harmful substances during use, causing environmental pollution. In inclement weather such as rain, the snake-repellent effect of the PTFE coating significantly decreases, failing to effectively prevent snakes from climbing. The coating's lifespan of only 2-3 years necessitates frequent maintenance or replacement, increasing operating costs. The potential release of harmful substances during PTFE use also poses a potential threat to the ecological environment.

[0032] Existing technology two uses a barbed structure to prevent snakes from climbing power transmission towers. The barbs physically block snakes from climbing, providing some protection. However, this structure is complex to install and maintain, and its snake-repelling effect is limited; it cannot actively deter snakes from approaching. The installation and maintenance of the barbed structure is cumbersome, requiring professional personnel, increasing labor and time costs. The barbs only act as a barrier after a snake comes into contact with them; they cannot actively deter snakes, which may still approach the power transmission tower. The barbed structure may also cause injury to maintenance personnel, posing a certain safety hazard.

[0033] To address the aforementioned problems, this application provides an anti-snake climbing coating for power transmission towers and its preparation method, solving the issues of the prior art. Specifically, existing snake-repelling methods typically use polytetrafluoroethylene (PTFE) as the anti-snake coating or barbed structure; however, the anti-snake effect of existing technologies decreases in harsh weather conditions. Existing coatings have limited lifespans and require frequent maintenance. Existing materials may pollute the environment. The installation and maintenance process of existing physical structures is cumbersome. Existing technologies cannot actively repel snakes. Considering these problems, the inventors investigated whether it is possible to achieve active snake repellency and improve snake-repelling efficiency by loading natural snake-repelling components such as sulfur onto mesoporous silica. Photocatalyst nanoparticles are composited on the coating surface, utilizing rainwater washing and ultraviolet decomposition of pollutants to extend the service life. The coating substrate uses a biodegradable polymer, reducing the ecological impact after the device is abandoned and is non-toxic. A modular patch design is adopted, with magnetic material pre-placed on the patch edges, eliminating the need for bolt fixation and facilitating installation and maintenance. It can also be combined with physical anti-snake structures (such as barbs) to form double protection, further improving the anti-snake climbing effect. Based on this, the solution of this application is proposed.

[0034] This application provides an anti-snake-climbing coating for power transmission towers, the coating comprising the following components by weight percentage:

[0035] Matrix material: 40% biodegradable polyurethane;

[0036] Functional filler: 25% mesoporous silica supported on sulfur;

[0037] Photocatalyst: 10% titanium dioxide nanoparticles;

[0038] Additives: 25% (dispersant, thickener and UV stabilizer).

[0039] In one possible implementation, the coating employs a multi-layered composite structure, including a base layer, an intermediate layer, and a top layer:

[0040] The bottom layer is a biodegradable adhesive layer used to enhance adhesion to the tower surface;

[0041] The middle layer is a snake-repelling functional layer containing drug-loaded nanoparticles;

[0042] The surface layer is a photocatalytic self-cleaning layer, in which titanium dioxide nanoparticles are dispersed.

[0043] Optionally, the coating is in the form of a modular patch structure, with a magnetic adsorption layer at the edge of the patch to facilitate adsorption onto the surface of iron towers.

[0044] In one possible implementation, the sulfur loading on mesoporous silica is 15%.

[0045] Optionally, the particle size of the titanium dioxide nanoparticles is 20-50 nm.

[0046] In one possible implementation, sulfur is loaded into the mesoporous channels of silica via both physical adsorption and chemical bonding.

[0047] Optionally, mesoporous silica can be replaced with mesoporous carbon materials (pore size 5-30 nm), the sulfur loading can be adjusted to 10%, and the remaining components remain unchanged. The sulfur slow-release period can be extended, but the initial snake-repelling efficiency will be slightly reduced. This method is suitable for areas where longer-lasting effectiveness is required and snake threats are lower.

[0048] Optionally, for non-ferrous poles (such as concrete or wooden structures), a non-magnetic installation option can be selected:

[0049] The edges of the patch are made of bio-based adhesive (starch-polylactic acid copolymer) instead of magnetic strips, and the peel strength after curing is ≥1.0N / mm.

[0050] Calcium nitride can also be incorporated into the surface slurry to broaden the photoresponse to the visible light range. This can improve pollutant degradation rates under cloudy or rainy weather conditions, making it suitable for areas with insufficient sunlight (such as the Yunnan-Guizhou Plateau).

[0051] Figure 1 This is a schematic flowchart illustrating the method for preparing the anti-snake-climbing coating for transmission towers provided in this application, as shown below. Figure 1 As shown, the method includes:

[0052] S101: The pre-prepared matrix material, functional filler, photocatalyst and auxiliary agent are mixed in a preset ratio to obtain the bottom layer slurry, the intermediate layer slurry and the surface layer slurry.

[0053] In this step, to achieve automatic snake repellency and avoid environmental pollution, biodegradable polyurethane can be used as the matrix material. This provides mechanical strength and flexibility, while controlled degradation prevents environmental pollution. The degradation mechanism of biodegradable polyurethane involves the hydrolysis and breakage of ester bonds in the molecular chain in a humid and hot environment, with the degradation products being... and .

[0054] The matrix material accounts for 40% of the base layer, 35% of the intermediate layer, and 30% of the surface layer. Alternatively, the proportion of the matrix material can be freely set according to the actual usage environment.

[0055] The functional filler is sulfur-loaded mesoporous silica. Mesoporous silica (pore size 2-50 nm, specific surface area >500 m² / g) provides high loading capacity and slow-release channels. Sulfur and mesoporous silica are mixed at a drug loading of 15%, and the loading efficiency is >95% after ball milling for 4 hours, as verified by SEM-EDS.

[0056] The snake-repelling mechanism is the oxidation of sulfur. The gas (GC-MS detected concentration 0.1-0.3 ppm) is used to actively repel snakes by interfering with their vomeronasal sensory perception.

[0057] The photocatalyst is titanium dioxide nanoparticles with a particle size of 20-50 nm and a BET specific surface area of ​​50-100 m² / g, which can balance catalytic activity and dispersibility. Contact angle measurements show that ultraviolet irradiation induces surface hydroxylation, reducing the contact angle from an initial 75° to 8°, achieving superhydrophilic self-cleaning.

[0058] The additives include dispersants, thickeners, and UV stabilizers. The dispersant can be a polycarboxylate ammonium salt, which prevents nanoparticle aggregation through electrostatic repulsion. The thickener is hydroxyethyl cellulose, which can adjust the rheological properties of the slurry. The UV stabilizer is a benzotriazole derivative, which can absorb the UV-A / B band (280-400nm) and delay the photoaging of polyurethane.

[0059] S102: In sequence, the bottom layer slurry, the intermediate layer slurry, and the top layer slurry are sprayed onto the substrate surface and cured to obtain a coating.

[0060] In this step, after obtaining the slurry for each layer, the coating is sprayed sequentially to obtain the coating layer.

[0061] For example, the base coat is applied by uniformly spraying a 50-80μm adhesive layer using a high-pressure airless spray gun (nozzle diameter 0.5mm), and pre-curing at 80℃ for 1 hour to form a dense interface (adhesion ≥5MPa).

[0062] Intermediate layer spraying: The snake-repellent functional layer is 100-150μm thick and cured at 120℃ for 2 hours to ensure that the sulfur filler is tightly bonded to the polyurethane matrix (SEM shows that the filler dispersion uniformity is >90%).

[0063] Surface coating: self-cleaning layer thickness 20-30μm, UV light (365nm) post-treatment for 30 minutes to activate the photocatalytic activity of titanium dioxide (EPR detection shows a 3-fold increase in the generation of ·OH free radicals).

[0064] Optionally, the above curing process is achieved through stepped temperature control: pre-curing of the bottom layer (80℃) → complete curing of the middle layer (120℃) → photoactivation of the surface layer (room temperature + UV), to avoid premature volatilization of sulfur due to high temperature.

[0065] Interface bonding is strengthened, and the interlayer thermal expansion coefficient matching design (bottom layer ≈ steel substrate, middle layer / surface layer gradient transition) prevents delamination and cracking.

[0066] S103: Cut the coating into modular patches and pre-place magnetic material on the edge of each patch to obtain an anti-climb coating.

[0067] In this step, after obtaining the coating, it can be cut to obtain modular patches for easy use, and magnetic material can be pre-placed on the edge of each patch for convenient use.

[0068] For example, a 30cm×30cm square patch is processed using a CO2 laser cutter (80W power) with an edge accuracy of ±0.1mm to ensure seamless splicing. Neodymium iron boron magnetic strips (magnetic energy product 45MGOe, nickel-plated for rust prevention) are embedded in the edge of the patch, with a magnetic attraction strength ≥1.5N / cm², suitable for installation on curved tower surfaces (curvature radius >0.5m).

[0069] Optionally, the weight percentage of each material in the above coating is as follows:

[0070] Matrix material: 40% biodegradable polyurethane;

[0071] Functional filler: 25% mesoporous silica loaded with sulfur (15% drug loading);

[0072] Photocatalyst: 10% titanium dioxide nanoparticles (particle size 20-50nm);

[0073] Additives: 25% (dispersant, thickener and UV stabilizer).

[0074] Furthermore, the coating is a multi-layered composite structure, with each layer emphasizing a different function. Therefore, different materials are distributed in each layer according to a gradient principle. The bottom layer, whose core function is strong adhesion, contains only the matrix and auxiliary agents, without functional fillers or photocatalysts. The middle layer, whose core function is long-lasting snake repellency, contains all the functional fillers (25%), with matrix materials and auxiliary agents added as needed. The top layer, whose core function is self-cleaning, contains all the photocatalysts (10%), with matrix materials and auxiliary agents added as needed.

[0075] For example, the ratio of the bottom layer can be:

[0076] Biodegradable polyurethane: 65%

[0077] Excipients: 35%

[0078] Dispersant (ammonium polycarboxylate): 12%

[0079] Thickener (hydroxyethyl cellulose): 15%

[0080] UV protectant (benzotriazole): 8%

[0081] Without interference from functional fillers, a dense adhesive interface is formed, and the porosity is <2% as observed by SEM.

[0082] Intermediate layer (snake repellent layer):

[0083] Biodegradable polyurethane: 45%

[0084] Mesoporous silica-supported sulfur (15% loading): 25%

[0085] Excipients: 30%

[0086] Dispersant: 10%

[0087] Thickener: 12%

[0088] UV protectant: 8%

[0089] HPLC monitoring showed that the sulfur release rate was 0.08-0.12 mg / cm²·day, and SEM-EDS surface scan analysis showed that the packing material dispersion uniformity was >95%.

[0090] surface layer:

[0091] Biodegradable polyurethane: 35%

[0092] Titanium dioxide nanoparticles (20-50nm): 10%

[0093] Excipients: 55%

[0094] Dispersant: 25%

[0095] Thickener: 10%

[0096] UV protectant: 20%

[0097] Experiments have verified that under ultraviolet light irradiation, the contact angle is <10°, the pollutant degradation rate is >90% / 7 days, the degree of hydroxylation on the titanium dioxide surface is increased by 3 times, and the XPS analysis shows that the intensity ratio of the -OH peak is >25%.

[0098] It should be noted that the above-mentioned ratio of different layers is merely an example, and the embodiments in this application are not specifically limited.

[0099] The method for preparing an anti-snake climbing coating for transmission towers provided in this application involves mixing pre-prepared matrix materials, functional fillers, photocatalysts, and auxiliary agents in predetermined proportions to obtain a base slurry, an intermediate slurry, and a surface slurry. These three slurries are then sequentially sprayed onto the substrate surface and cured to obtain a coating. The coating is then cut into modular patches, and magnetic material is pre-placed at the edge of each patch to obtain the anti-climb coating. This method achieves active snake repellency, improves snake repellency efficiency, extends service life, and avoids environmental pollution.

[0100] The following is an experimental verification of the function of the coating prepared above:

[0101] 1. Comparative Experiment on Snake Repelling Efficiency

[0102] Test group: Iron towers coated with the coating provided in this application (specifications: 10m high, 0.5m in diameter);

[0103] Control group 1: Uncoated iron towers of the same specifications;

[0104] Control group 2: Iron towers coated with traditional polytetrafluoroethylene (PTFE) coating;

[0105] Test area: A mountainous area where snakes are active (average annual temperature 25℃, humidity 80%).

[0106] Testing period: 12 consecutive months, covering all four seasons;

[0107] Snake specimens: 50 locally common climbing snake species (such as rat snake and king snake) were tagged (with GPS trackers installed).

[0108] Tower layout:

[0109] Ten test towers, ten control towers (1), and ten control towers (2) were set up at equal intervals within a 1 km² area.

[0110] Infrared cameras (night vision function, 1080p resolution) and vibration sensors are installed at the bottom of all towers.

[0111] Data collection:

[0112] Climbing behavior determination: A snake's body touching the pole and rising ≥0.5m is recorded as a "climbing event";

[0113] Data recording: Daily statistics on the number of climbing events, climbing height, and snake dwell time.

[0114] Experimental results:

[0115] Test group: Average number of climbing events per year: 2.1±0.5, average climbing height (m): 0.3 (only touching the bottom), avoidance efficiency (%): 95.2.

[0116] Control group 1: Average number of climbing events per year: 18.7 ± 3.2, average climbing height (m): 4.2.

[0117] Control group 2: Average number of climbing events per year: 9.8±1.8, average climbing height (m): 2.7, avoidance efficiency (%): 47.6.

[0118] Data Analysis:

[0119] ANOVA analysis showed significant differences between the test group and the two control groups (p<0.01); sulfur release rate monitoring showed that the release of sulfur from the coating decreased by <15% within 12 months.

[0120] 2. Quantitative test of self-cleaning performance

[0121] Test samples: the coating prepared in this application (the surface layer contains titanium dioxide), a traditional polytetrafluoroethylene coating, and a common paint coating;

[0122] Pollutants: Simulated outdoor pollutants (10g / m² carbon black particles + 5g / m² vegetable oil).

[0123] Light conditions: Ultraviolet light source (wavelength 365nm, intensity 50mW / cm²), 8 hours of irradiation per day.

[0124] Contaminant Coating: Use a spraying device to evenly coat the contaminant onto the coating surface;

[0125] Self-cleaning effect monitoring:

[0126] Contact angle test: Measure the surface contact angle every 24 hours;

[0127] Pollutant residue rate: Surface coverage is calculated using image analysis software;

[0128] Chemical degradation rate: FT-IR detection of the intensity changes of characteristic peaks of pollutants (such as C=O bond in vegetable oil at 1720 cm⁻¹).

[0129] Experimental results:

[0130] The coating prepared in this application had the following characteristics after 7 days: contact angle (°): 8±2, pollutant residue rate (%): 9.3±1.5, and C=O bond degradation rate (%): 91.2±3.8.

[0131] Polytetrafluoroethylene: after 7 days, contact angle (°): 115±10, pollutant residue rate (%): 82.4±4.2, C=O bond degradation rate (%): 4.1±1.2.

[0132] Ordinary paint: after 7 days, contact angle (°): 75±8, pollutant residue rate (%): 68.7±3.6, C=O bond degradation rate (%): 12.5±2.5.

[0133] ROS analysis and electron paramagnetic resonance (EPR) confirmed that the coating prepared in this application generates ·OH and ·OH under light irradiation. Free radicals (signal intensity 20 times higher than polytetrafluoroethylene), SEM showed that titanium dioxide nanoparticles were uniformly distributed and without agglomeration (particle size distribution 20-50nm).

[0134] 3. Accelerated aging and adhesion test

[0135] Testing standards:

[0136] Adhesion: ASTM D4541 (hydraulic pull-out test);

[0137] Aging test: ASTM G154 Cycle 4 (8h UV irradiation / 4h condensation, 50℃).

[0138] Test cycles: 0h (initial), 500h, 1000h.

[0139] Sample preparation: The coating was sprayed onto Q235 steel plate (10cm×10cm), with 5 parallel samples per group;

[0140] Data collection:

[0141] After each cycle, the adhesion, number of surface cracks (microscopic observation), and color difference (ΔE value, CIE Lab standard) are measured.

[0142] Experimental results:

[0143] Aging time (h): 0, adhesion (MPa): 5.2±0.3, number of surface cracks (strips / cm²): 0, color difference ΔE: 0.

[0144] Aging time (h): 500, adhesion (MPa): 4.8±0.2, number of surface cracks (strips / cm²): 1.2±0.5, color difference ΔE: 1.5±0.3.

[0145] Aging time (h): 1000, adhesion (MPa): 4.5±0.4, number of surface cracks (strips / cm²): 2.7±0.8, color difference ΔE: 2.8±0.5.

[0146] Comparative analysis:

[0147] Traditional coating (PTFE): After 1000 hours, the adhesion drops to 2.1 MPa, and the number of cracks is >10 / cm²;

[0148] SEM-EDS showed that the biodegradable polyurethane matrix of the coating prepared in this application maintained a continuous phase structure after aging, without phase separation.

[0149] 4. Ecotoxicity expansion experiment

[0150] Test subject:

[0151] Aquatic organisms: zebrafish, giant daphnia, and Chlorella;

[0152] Terrestrial organisms: earthworms, soil microbial communities.

[0153] Acute toxicity: OECD 203 (fish), OECD 202 (daphnia), exposure concentration 100 mg / L (coating extract);

[0154] Chronic toxicity: OECD 211 (algal growth inhibition, exposure period 72h);

[0155] Soil degradation: ISO 11266 standard (coating fragments buried in soil, monitoring degradation rate after 90 days).

[0156] Experimental results:

[0157] Test item: 96-hour mortality rate of zebrafish, result: 0%, reference standard limit: limit of toxic substances (LC50>100mg / L).

[0158] Test item: Daphnia magna 48h EC50, result: >100mg / L, reference standard limit: non-toxic (EC50>100mg / L).

[0159] Test item: Algal growth inhibition rate, result: 4.2%, reference standard limit: non-toxic (inhibition rate <10%).

[0160] Test item: Soil degradation rate, result: 82% (90 days), reference standard limit: biodegradable materials (>60%).

[0161] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A snake-proof climbing coating for power transmission towers, characterized in that, The coating comprises 40% matrix material, 25% functional filler, 10% photocatalyst and 25% auxiliary agent; The coating has a multi-layer composite structure, including a base layer, an intermediate layer, and a surface layer; The bottom layer is a biodegradable adhesive layer used to enhance the adhesion between the coating and the tower surface; The intermediate layer is a snake-repelling functional layer, containing the aforementioned functional filler; The surface layer is a photocatalytic self-cleaning layer containing the photocatalyst.

2. The coating according to claim 1, characterized in that, The coating is a modular patch structure with a magnetic adsorption layer at the edge for adsorption onto the tower surface.

3. The coating according to claim 1, characterized in that, The matrix material is biodegradable polyurethane.

4. The coating according to claim 1, characterized in that, The functional filler is sulfur supported on mesoporous silica.

5. The coating according to claim 1, characterized in that, The photocatalyst is titanium dioxide nanoparticles.

6. The coating according to claim 1, characterized in that, The auxiliary agents include dispersants, thickeners, and UV stabilizers.

7. The coating according to claim 1 or 4, characterized in that, The drug loading of the functional filler is 15%.

8. The coating according to claim 4, characterized in that, The sulfur is loaded into the mesoporous channels of the silica through both physical adsorption and chemical bonding.

9. A method for preparing an anti-snake-climbing coating for power transmission towers, characterized in that, include: The pre-prepared matrix material, functional filler, photocatalyst and auxiliary agent are mixed in a preset ratio to obtain bottom layer slurry, intermediate layer slurry and surface layer slurry. The matrix material is biodegradable polyurethane, the functional filler is mesoporous silica supported sulfur, the photocatalyst is titanium dioxide nanoparticles, and the auxiliary agent includes dispersant, thickener and anti-ultraviolet agent. In sequence, the bottom layer slurry, the intermediate layer slurry, and the top layer slurry are sprayed onto the substrate surface and cured to obtain a coating. The coating comprises 40% of the matrix material, 25% of the functional filler, 10% of the photocatalyst, and 25% of the auxiliary agent. The coating is cut into modular patches, and magnetic material is pre-placed on the edge of each patch to obtain an anti-climb coating.

10. The method according to claim 9, characterized in that, The method further includes: The mesoporous silica is mixed with the sulfur, and the sulfur is uniformly loaded into the mesoporous channels of silica by ball milling to obtain the functional filler.

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