Transparent self-cleaning antibacterial antifouling surface coating structure

Abstract

The utility model discloses a transparent self-cleaning antibacterial antifouling surface coating structure which is composed of a supporting layer and a micro-column array, and antibacterial elements are distributed in the micro-column array and / or on the surface of the micro-column array. The surface coating structure is a composite layer structure, and through the synergistic effect of the supporting layer, the micro-column array and the antibacterial element, the transparent property is achieved while the efficient and lasting antibacterial and antifouling requirements are met.

Description

Technical Field

[0001] This utility model belongs to the field of antibacterial coatings and relates to a transparent, self-cleaning, antibacterial, and antifouling surface coating structure, which can be applied to antibacterial coatings, biomedicine, and other fields. Background Technology

[0002] Bacteria are microorganisms that people frequently encounter in their daily lives. The spread of pathogens in our daily lives not only endangers human health but also severely damages some medical materials. For example, medical equipment, food packaging, textiles, and marine vessels are facing contamination by harmful bacteria, and bacterial contamination has become a major public health concern worldwide.

[0003] The research and application of antibacterial and antifouling surface coating structures aim to provide a durable solution to reduce the spread of microorganisms and surface contamination, effectively protecting human health and environmental hygiene. Antibacterial and antifouling surface coating structures are composite layer structures designed to combat microorganisms and dirt. Their purpose is to reduce the growth and spread of bacteria and other pathogens while decreasing the surface's ability to retain dirt. By mimicking the structure of certain organisms in nature, composite layer structures with hydrophobic, antibacterial, and antifouling properties are designed. However, single-structure surfaces suffer from poor antibacterial and antifouling properties. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a novel transparent self-cleaning antibacterial and antifouling surface coating structure. The surface coating structure is a composite layer structure, which, through the synergistic effect of the support layer, micropillar array, and antibacterial elements, not only meets the requirements of high efficiency and long-lasting antibacterial and antifouling properties, but also has transparent properties.

[0005] A transparent, self-cleaning, antibacterial, and antifouling surface coating structure is composed of a support layer and a micropillar array, with antibacterial elements distributed inside and / or on the surface of the micropillar array.

[0006] In one embodiment, the material of the support layer is transparent and is any one or a combination of several of the following: silicone rubber, polyurethane elastomer, epoxy elastomer, polyolefin, hydrogel, and oleogel.

[0007] In one embodiment, the support layer is any one of a solid structure or a porous structure, or a combination of both, and the micropillar array and the support layer are processed in one step or processed separately and then bonded together.

[0008] In one embodiment, the column material of the micropillar array is transparent and is any one or a combination of several of the following: silicone rubber, polyurethane elastomer, epoxy elastomer, polyolefin, and gel.

[0009] In one embodiment, the pillar material and the support layer material of the micropillar array are the same.

[0010] In one embodiment, the pillar material and the support layer material of the micropillar array are different, and the interface is bonded together by hot pressing.

[0011] In one embodiment, the diameter of the pillars in the micropillar array is 0.05 to 500 micrometers, the length-to-diameter ratio of the pillars is 0.2:1 to 5:1, and the pillars are arranged in a square or hexagonal pattern.

[0012] In one embodiment, antibacterial units are distributed within the micropillar array structure, and the antibacterial units are distributed in the columnar structure in any one or a combination of chemical bonding or physical dispersion.

[0013] In one embodiment, the antibacterial motif is any one or a combination of several of the following: nano zinc oxide, nano titanium dioxide, nano silver inorganic materials, triclosan, chlorhexidine, quaternary ammonium salts, pyridines, and imidazoles.

[0014] In one embodiment, the shape of the pillars in the micropillar array is any one of cuboid, spindle, polygonal, cylinder, cone, or inverted cone.

[0015] In one embodiment, the ends of the micropillar array pillars are any one of the following: circular, polygonal, irregular polygonal, spatula-shaped, mushroom-shaped, pit-shaped, and conical.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention provides a novel transparent self-cleaning antibacterial and antifouling surface coating structure. The surface coating structure is a composite layer structure. Through the synergistic effect of the support layer, micropillar array and antibacterial unit, it meets the requirements of high efficiency and long-lasting antibacterial and antifouling while also being transparent. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model from the front and side.

[0019] Figure 2 This is a SEM image of the overall structure of Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model from the front and side.

[0021] Figure 4 This is a top-view optical microscope diagram of Embodiment 3 of this utility model;

[0022] Figure 5This is a SEM image of the cross-section of a single column in Embodiment 3 of this utility model;

[0023] Figure reference numerals: 1-support layer, 2-micropillar array, 3-antimicrobial unit. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 2 to 5 As shown, a transparent self-cleaning antibacterial and antifouling surface coating structure is composed of two parts: a support layer 1 and a micropillar array 2, and antibacterial elements are distributed inside and / or on the surface of the micropillar array 2.

[0026] The material of the support layer 1 is transparent and is any one or a combination of several of the following: silicone rubber, polyurethane elastomer, epoxy elastomer, polyolefin, hydrogel, and oleogel.

[0027] The support layer 1 can be any one of a solid structure or a porous structure, or a combination of both. The micropillar array 2 and the support layer 1 can be processed in one step or processed separately and then bonded together.

[0028] The column material of the micropillar array 2 is transparent and is any one or a combination of several of the following: silicone rubber, polyurethane elastomer, epoxy elastomer, polyolefin, and gel.

[0029] The column material of the micropillar array 2 is the same as that of the support layer 1.

[0030] The column material of the micro-pillar array 2 is different from that of the support layer 1, and the interface is firmly bonded (preferably by hot pressing).

[0031] The diameter of the pillars in the micropillar array 2 is 0.05~500 micrometers, the length-to-diameter ratio of the pillars is 0.2:1~5:1, and the pillars are arranged in a square or hexagonal pattern.

[0032] The micropillar array 2 structure contains antibacterial units distributed within it. These antibacterial units are distributed in the columnar structure in any one or a combination of chemical bonding and physical dispersion.

[0033] The antibacterial element is any one or a combination of several of the following: nano zinc oxide, nano titanium dioxide, nano silver inorganic materials, triclosan, chlorhexidine, quaternary ammonium salts, pyridines, and imidazoles.

[0034] The shape of the pillars in the micropillar array can be any one of cuboid, spindle, polygon, cylinder, cone, or inverted cone.

[0035] The ends of the micropillar array 2 pillars can be any one of the following: circular, polygonal, irregular polygonal, spatula-shaped, mushroom-shaped, pit-shaped, or conical.

[0036] The following are three specific implementation examples:

[0037] Example 1:

[0038] like Figure 1 and Figure 2 The transparent, self-cleaning, antibacterial, and antifouling surface coating structure shown has a support layer 1 that is a solid structure with neatly aligned longitudinal and transverse sections, made of polydimethylsiloxane silicone rubber. The micropillar array 2 consists of pillars made of polydimethylsiloxane silicone rubber, cylindrical in shape with rounded ends, a diameter of 50 micrometers, and a height of 50 micrometers. The pillars in the micropillar array 2 are arranged in a square stack with a spacing of 10 micrometers. The antibacterial element is 4,5-dichloro-2-octyl-4-isothiazolin-3-one, and the antibacterial element 3 is uniformly distributed inside and on the surface of the micropillar array 2 through physical doping.

[0039] The wettability of the surface of Example 1 was tested using a contact angle meter. The test droplet was deionized water; the droplet volume for testing the static contact angle was 3 μL, and the droplet volume for testing the roll-off angle was 6 μL. The transmittance of the surface coating of Example 1 in the 400 nm to visible light range was measured using a UV spectrophotometer. The antibacterial properties of the surface coating were tested using the plate count method, with a plate area of ​​1.5 × 1.5 cm². 2 The coating, with a concentration of 3×10 5 A 20 μL suspension of CPU / mL was spread evenly on the surface and then incubated at 37°C for 24 h. The colony formation was observed and recorded. The bacteria used were two representative Gram-negative bacteria: Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus).

[0040] The test results are as follows: static contact angle is 143°. o The roll angle is 12. o It has a light transmittance of 98%, an antibacterial rate of 98% against Escherichia coli, and an antibacterial rate of 98% against Staphylococcus aureus.

[0041] Example 2:

[0042] like Figure 3The transparent, self-cleaning, antibacterial, and antifouling surface coating structure shown has a support layer 1 that is a solid structure with neatly aligned longitudinal and transverse columns, made of polydimethylsiloxane silicone rubber. The micropillar array 2 consists of pillars made of polydimethylsiloxane silicone rubber, cylindrical in shape with rounded ends, 50 micrometers in diameter and 50 micrometers in height, arranged in a square stack with a spacing of 10 micrometers. The antifouling element 3 is composed of dimethyloctadecyl[3-trimethoxysilylpropyl]ammonium chloride and nano-titanium dioxide. The antibacterial element is uniformly distributed inside and on the surface of the micropillar array 2 through chemical bonding and physical doping.

[0043] The wettability of the surface of Example 2 was tested using a contact angle meter. The test droplet was deionized water; the droplet volume for testing the static contact angle was 3 μL, and the droplet volume for testing the roll-off angle was 6 μL. The transmittance of the surface coating of Example 2 in the 400 nm to visible light range was measured using a UV spectrophotometer. The antibacterial properties of the surface coating were tested using the plate colony counting method, with an area of ​​1.5 × 1.5 cm². 2 The coating, with a concentration of 3×10 5 A 20 μL suspension of CPU / mL was spread evenly on the surface and then incubated at 37°C for 24 h. The colony formation was observed and recorded. The bacteria used were two representative Gram-negative bacteria: Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus).

[0044] The test results are as follows: the static contact angle is 147°. o The roll angle is 9 o It has a light transmittance of 98%, an antibacterial rate of 99% against Escherichia coli, and an antibacterial rate of 99% against Staphylococcus aureus.

[0045] Example 3:

[0046] like Figure 4 and Figure 5 The transparent, self-cleaning, antibacterial, and antifouling surface coating structure shown has a support layer 1 that is a solid structure with neatly aligned longitudinal and transverse axes, made of polydimethylsiloxane. The micropillar array 2 consists of pillars made from a material prepared from n-octyltriethoxysilane, tetraethyl silicate, and polydimethylsiloxane. The pillars are hexagonal in shape, with hexagonal ends, a side length of 10 micrometers, and a height of 10 micrometers. The pillars in the micropillar array 2 are arranged in a hexagonal stack with a spacing of 5 micrometers. The antifouling element 3 is dimethyloctadecyl[3-trimethoxysilylpropyl]ammonium chloride and nano-silver. The antibacterial element is uniformly distributed inside and on the surface of the micropillar array 2 through chemical bonding and physical doping.

[0047] The wettability of the surface of Example 3 was tested using a contact angle meter. The test droplet was deionized water; the droplet volume for testing the static contact angle was 3 μL, and the droplet volume for testing the roll-off angle was 6 μL. The transmittance of the surface coating of Example 3 in the 400 nm to visible light range was measured using a UV spectrophotometer. The antibacterial performance of the surface coating was tested using the plate count method, with an area of ​​1.5 × 1.5 cm². 2 The coating, with a concentration of 3×10 5 A 20 μL suspension of CPU / mL was spread evenly on the surface and then incubated at 37°C for 24 h. The colony formation was observed and recorded. The bacteria used were two representative Gram-negative bacteria: Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus).

[0048] The test results are as follows: static contact angle is 152°. o The roll angle is 7 o It has a light transmittance of 99%, an antibacterial rate of 99.80% against Escherichia coli, and an antibacterial rate of 99.90% against Staphylococcus aureus.

[0049] Table 1 Comparison of surface antibacterial rate between the embodiments of this utility model and existing technologies.

[0050] sample Antibacterial rate of Escherichia coli Micropillarless array without antibacterial elements on silicone rubber surface 53% Silicone rubber surface without micropillar array containing 4,5-dichloro-2-octyl-4-isothiazolin-3-one antibacterial unit 87% Example 1: 98％ Example 2: 99％ Example 3: 99.80％

[0051] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A transparent, self-cleaning, antibacterial, and stain-resistant surface coating structure, characterized in that, It consists of two parts: a support layer and a micropillar array, and antibacterial elements are distributed on the surface of the micropillar array.

2. The transparent self-cleaning antibacterial and antifouling surface coating structure according to claim 1, characterized in that, The support layer can be any one of a solid structure or a porous structure, or a combination of both. The micropillar array and the support layer can be processed in one step or processed separately and then bonded together.

3. The transparent self-cleaning antibacterial and antifouling surface coating structure according to claim 1, characterized in that, The column material and the support layer material of the micropillar array are the same.

4. The transparent self-cleaning antibacterial and antifouling surface coating structure according to claim 1, characterized in that, The column material and the support layer material of the micropillar array are different, and the interface is bonded by hot pressing.

5. A transparent self-cleaning antibacterial and antifouling surface coating structure according to any one of claims 1-4, characterized in that, The diameter of the pillars in the micropillar array is 0.05~500 micrometers, the length-to-diameter ratio of the pillars is 0.2:1~5:1, and the pillars are arranged in a square or hexagonal pattern.

6. The transparent self-cleaning antibacterial and antifouling surface coating structure according to claim 1, characterized in that, The shape of the pillars in the micropillar array is any one of spindle, polygon, cylinder, and cone; the ends of the pillars in the micropillar array are any one of circle, polygon, and cone.

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