Photovoltaic glass self-cleaning dustproof coating structure

Abstract

The utility model relates to a photovoltaic glass self-cleaning dustproof coating structure, which belongs to the technical field of glass coatings and comprises a bottom coating, a self-cleaning functional layer and a top coating which are sequentially stacked on a photovoltaic glass substrate. A roughened transition interface is formed between the bottom coating and the photovoltaic glass substrate, a micro-nano convex structure layer is formed on the surface of the top coating, and organic matters can be decomposed by photon-generated carriers generated by nano titanium dioxide under the irradiation of sunlight; inorganic matter pollutants such as dust and the like are difficult to adhere due to the micro-nano convex structure and the low surface energy characteristic of the top coating, and self-cleaning can be achieved under rain wash. Meanwhile, static electricity is effectively dissipated through the carbon nano tube network structure, the phenomenon that dust is attached due to electrostatic adsorption is reduced, and the dustproof capacity of the coating is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of solar collector technology, specifically a self-cleaning dustproof coating structure for photovoltaic glass. Background Technology

[0002] As a crucial component of clean energy, solar photovoltaic (PV) power generation efficiency is significantly affected by the cleanliness of the PV module surface. In practical applications, PV glass surfaces easily attract dust, oil, and other contaminants, leading to reduced light transmittance and consequently lower power generation efficiency. Traditional cleaning methods rely on manual or mechanical cleaning, which are costly, inefficient, and may damage the glass surface.

[0003] While some self-cleaning coating solutions exist in existing technologies, they generally suffer from insufficient adhesion, poor durability, and unsatisfactory self-cleaning effects. For example, some coatings rely solely on hydrophobic or photocatalytic principles, making it difficult to cope with various contaminants in complex environments; others have unreasonable structural designs, resulting in weak bonding between layers and easy peeling after long-term use. Therefore, it is necessary to develop a structurally optimized and reliable self-cleaning dustproof coating structure for photovoltaic glass. Utility Model Content

[0004] Technical problem to be solved by the utility model

[0005] The purpose of this invention is to solve the problems mentioned in the background.

[0006] Technical solution

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0008] The present invention discloses a self-cleaning and dustproof coating structure for photovoltaic glass, comprising a base coating, a self-cleaning functional layer and a top coating, which are sequentially stacked on a photovoltaic glass substrate; a roughened transition interface is formed between the base coating and the photovoltaic glass substrate, and a micro-nano protrusion structure layer is formed on the surface of the top coating.

[0009] Preferably, the roughened transition interface is formed by plasma treatment, with a surface roughness of 0.1-0.5 micrometers, and the undercoating layer is embedded in the pits of the roughened transition interface to form a mechanical anchoring structure.

[0010] Preferably, a nano-titanium dioxide particle dispersion phase is formed inside the self-cleaning functional layer. The nano-titanium dioxide particles have a particle size of 20-50 nanometers, and the dispersion phase is distributed in a gradient in the functional layer, with the particle concentration on the side closer to the bottom coating layer being higher than that on the side closer to the top coating layer.

[0011] Preferably, the micro-nano protrusion structure of the top coating is distributed in a columnar array, with a protrusion height of 0.5-2 micrometers and a spacing of 1-5 micrometers between adjacent protrusions. The top surface of the protrusion structure is a hydrophobic layer containing fluoropolymer with a surface energy of less than 20 mN / m.

[0012] Preferably, the thickness of the base coating is 5-10 micrometers, and the interior has nanoscale pores that penetrate the coating, the pores being filled with silane coupling agent molecular chains.

[0013] Preferably, a carbon nanotube network structure is embedded in the self-cleaning functional layer, wherein the diameter of the carbon nanotubes is 10-30 nanometers, the volume percentage of the functional layer is 1%-5%, and the carbon nanotube network forms a conductive path with the base coating.

[0014] Preferably, the total thickness of the three coating layers is 25-50 micrometers, and the coating layers form an interface transition region with a thickness of 50-200 nanometers through molecular bonding.

[0015] Beneficial effects

[0016] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0017] This invention relates to a self-cleaning dustproof coating structure for photovoltaic glass, which exhibits excellent self-cleaning performance: by combining the photocatalytic effect of nano-titanium dioxide and the hydrophobic effect of the micro-nano protrusion structure of fluoropolymer, it achieves efficient cleaning of various pollutants and significantly improves the light transmittance of photovoltaic glass.

[0018] This invention relates to a self-cleaning and dustproof coating structure for photovoltaic glass, which features high adhesion and durability. The design of the roughened transition interface, mechanical anchoring structure, and molecular bonding interface transition zone ensures a strong bond between the coating and the glass substrate, as well as between the coating layers themselves, enabling it to withstand long-term erosion from environmental factors such as wind, sun, and rain.

[0019] This invention relates to a self-cleaning dustproof coating structure for photovoltaic glass, which has antistatic and dustproof functions: the conductive pathways formed by the carbon nanotube network structure effectively dissipate static electricity, reduce dust adsorption, and further improve the dustproof ability of the coating.

[0020] This invention discloses a self-cleaning and dustproof coating structure for photovoltaic glass, offering excellent optical performance. The optimized coating thickness design and nanoparticle gradient distribution ensure both self-cleaning effectiveness and high light transmittance of the photovoltaic glass, minimizing impact on photovoltaic power generation efficiency. Attached Figure Description

[0021] Figure 1 This is a cross-sectional structural diagram of the self-cleaning dustproof coating structure of photovoltaic glass according to this utility model;

[0022] Figure 2 for Figure 1 A magnified view of part A in the middle, showing the roughened transition interface and mechanical anchoring structure;

[0023] Figure 3 A top view of the micro-nano protrusion structure of the top coating;

[0024] Figure 4 This is a schematic diagram of the carbon nanotube network structure in the self-cleaning functional layer.

[0025] Explanation of the labels in the diagram:

[0026] 100. Photovoltaic glass substrate; 110. Roughened transition interface;

[0027] 200. Primer coating; 210. Mechanical anchoring structure;

[0028] 300. Self-cleaning functional layer; 310. Carbon nanotube network structure;

[0029] 400. Top coating; 410. Micro / nano protrusion structure;

[0030] 500. Interface transition area one;

[0031] 600. Interface transition area two. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0036] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] Example 1

[0039] See attached document Figure 1-4 The photovoltaic glass self-cleaning dustproof coating structure of this embodiment includes a base coating 200, a self-cleaning functional layer 300 and a top coating 400 sequentially stacked on a photovoltaic glass substrate 100; a roughened transition interface 110 is formed between the base coating 200 and the photovoltaic glass substrate 100, and a micro-nano protrusion structure 410 layer is formed on the surface of the top coating 400.

[0040] The roughened transition interface 110 in this embodiment is formed by plasma treatment, with a surface roughness of 0.1-0.5 micrometers, and the base coating 200 is embedded in the pit of the roughened transition interface 110 to form a mechanical anchoring structure 210.

[0041] In this embodiment, a nano-titanium dioxide particle dispersion phase is formed inside the self-cleaning functional layer 300. The particle size of the nano-titanium dioxide particles is 20-50 nanometers, and the dispersion phase is distributed in a gradient in the functional layer. The particle concentration on the side closer to the bottom coating layer 200 is higher than that on the side closer to the top coating layer 400.

[0042] In this embodiment, the micro-nano protrusion structure 410 of the top coating 400 is distributed in a columnar array, with a protrusion height of 0.5-2 micrometers and a spacing of 1-5 micrometers between adjacent protrusions. The top surface of the protrusion structure is a hydrophobic layer containing fluoropolymer with a surface energy of less than 20 mN / m.

[0043] In this embodiment, the thickness of the base coating 200 is 5-10 micrometers, and the interior has nanoscale pores that penetrate the coating, and the pores are filled with silane coupling agent molecular chains.

[0044] In this embodiment, a carbon nanotube network structure 310 is embedded in the self-cleaning functional layer 300. The diameter of the carbon nanotubes is 10-30 nanometers, and the volume ratio in the functional layer is 1%-5%. The carbon nanotube network and the base layer 200 form a conductive path.

[0045] In this embodiment, the total thickness of the three coating layers—base layer 200, self-cleaning functional layer 300, and top layer 400—is 25-50 micrometers, and the coating layers form an interface transition region with a thickness of 50-200 nanometers through molecular bonding.

[0046] The self-cleaning and dustproof coating structure of the photovoltaic glass of this utility model includes a base coating 200, a self-cleaning functional layer 300 and a top coating 400 sequentially stacked on a photovoltaic glass substrate 100.

[0047] First, the surface of the photovoltaic glass substrate 100 is pretreated by using a plasma treatment process to form a roughened transition interface 110, with the surface roughness Ra controlled within the range of 0.1-0.5 micrometers. Then, a primer coating 200 is applied to the pretreated glass substrate surface using a spray coating process. The primer coating material is a resin material containing a silane coupling agent, and the coating thickness is 5-10 micrometers. During the coating process, the primer coating material is embedded in the pits of the roughened transition interface 110, forming a... Figure 2 The mechanical anchoring structure 210 shown enhances the adhesion between the base coating and the glass substrate.

[0048] After the base coat 200 has cured, a self-cleaning functional layer 300 is coated using a sol-gel method. This functional layer is formed by dispersing nano-titanium dioxide particles in an organosilicon-modified acrylic resin matrix, with the nano-titanium dioxide particles having a particle size of 20-50 nanometers. By controlling the coating process parameters, the nano-titanium dioxide particles are distributed in a gradient within the functional layer, with a higher particle concentration (approximately 30%) near the base coat and a lower concentration (approximately 10%) near the top coat. Simultaneously, a carbon nanotube network structure 310 is introduced into the self-cleaning functional layer 300. The carbon nanotubes have a diameter of 10-30 nanometers and a volume fraction of 1%-5%. The carbon nanotube network contacts the silane coupling agent molecular chains in the base coat 200, forming a conductive pathway.

[0049] Finally, a top coating 400 was prepared on the surface of the self-cleaning functional layer 300 using template-assisted nanoimprinting technology. The top coating material was a fluoropolymer, forming a... Figure 3 The micro / nano protrusion structure 410 is shown. The micro / nano protrusions are distributed in a columnar array, with a protrusion height of 0.5-2 micrometers and a spacing of 1-5 micrometers between adjacent protrusions. The top surface of the protrusion structure is a hydrophobic layer containing fluoropolymer, with a surface energy of less than 20 mN / m.

[0050] Each coating layer forms an interface transition region with a thickness of 50-200 nanometers through molecular bonding, such as the interface transition region 500 between the base coating layer 200 and the self-cleaning functional layer 300, and the interface transition region 600 between the self-cleaning functional layer 300 and the top coating layer 400, thereby ensuring the stability and durability of the overall coating structure.

[0051] When organic contaminants adhere to the surface of photovoltaic glass, the photogenerated charge carriers generated by nano-titanium dioxide under sunlight can decompose the organic matter. For inorganic contaminants such as dust, the micro-nano protrusion structure 410 and low surface energy characteristics of the top coating make it difficult for them to adhere, and they can be self-cleaned by rainwater. At the same time, the carbon nanotube network structure 310 effectively dissipates static electricity, reducing the phenomenon of dust adsorption due to electrostatic attraction, further improving the dustproof capability of the coating.

[0052] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A self-cleaning dustproof coating structure for photovoltaic glass, characterized in that, It includes a base coating (200), a self-cleaning functional layer (300) and a top coating (400) sequentially stacked on a photovoltaic glass substrate (100); a roughened transition interface (110) is formed between the base coating (200) and the photovoltaic glass substrate (100), and a micro-nano protrusion structure (410) layer is formed on the surface of the top coating (400).

2. The photovoltaic glass self-cleaning dustproof coating structure according to claim 1, characterized in that, The roughened transition interface (110) is formed by plasma treatment and has a surface roughness of 0.1-0.5 micrometers. The base coating (200) is embedded in the pit of the roughened transition interface (110) to form a mechanical anchoring structure (210).

3. The photovoltaic glass self-cleaning dustproof coating structure according to claim 1, characterized in that, The self-cleaning functional layer (300) forms a nano-titanium dioxide particle dispersion phase with a particle size of 20-50 nanometers. The dispersion phase is distributed in a gradient in the functional layer, with the particle concentration on the side closer to the bottom coating layer (200) being higher than that on the side closer to the top coating layer (400).

4. The photovoltaic glass self-cleaning dustproof coating structure according to claim 1, characterized in that, The micro-nano protrusion structure (410) of the top coating (400) is distributed in a columnar array, with a protrusion height of 0.5-2 micrometers and a spacing of 1-5 micrometers between adjacent protrusions. The top surface of the protrusion structure is a hydrophobic layer containing fluoropolymer with a surface energy of less than 20 mN / m.

5. The photovoltaic glass self-cleaning dustproof coating structure according to claim 1, characterized in that, The thickness of the base coating (200) is 5-10 micrometers, and the interior has nanoscale pores that penetrate the coating, and the pores are filled with silane coupling agent molecular chains.

6. The photovoltaic glass self-cleaning dustproof coating structure according to claim 1, characterized in that, The self-cleaning functional layer (300) is embedded with a carbon nanotube network structure (310), the carbon nanotubes having a diameter of 10-30 nanometers and accounting for 1%-5% of the volume in the functional layer, and the carbon nanotube network forming a conductive path with the base layer (200).

7. The photovoltaic glass self-cleaning dustproof coating structure according to claim 1, characterized in that, The total thickness of the three coating layers (base layer (200), self-cleaning functional layer (300) and top layer (400) is 25-50 micrometers, and the coating layers are bonded together to form an interface transition zone with a thickness of 50-200 nanometers.

Images