CN112661102A - Surface structure, surface structure preparation method and medical equipment - Google Patents
Surface structure, surface structure preparation method and medical equipment Download PDFInfo
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Abstract
The application relates to a surface structure, a surface structure preparation method and a medical device. The surface structure comprises a first layer structure and a second layer structure. The first layer structure is disposed on a surface of the medical device. The first layer structure has a plurality of micron-scale structures arranged at intervals. The second layer structure has a plurality of nano-scale structures arranged at intervals. The plurality of nano-scale structures are arranged on the surfaces of the plurality of micro-scale structures. The plurality of micro-scale structures may prevent microorganisms of a wide range of sizes from settling and adhering when the micro-organisms settle on the surface of the medical device. Through a plurality of micron-sized structures, no chemical antibacterial agent exists, and the adhesion of microorganisms can be effectively reduced. The micro-nano multi-level structure is formed through the micro-structure and the nano-structure, a super-hydrophobic surface is formed, and the super-hydrophobic function of the surface can be realized. The functions of green, pollution-free, long-acting, antibiosis and easy cleaning can be realized through the plurality of nano-scale structures and the plurality of micron-scale structures, and no adverse effect can be caused on human bodies and the environment.
Description
Technical Field
The application relates to the technical field of composite materials, in particular to a surface structure, a surface structure preparation method and medical equipment.
Background
Artificial leather is used in a plurality of products on the market, such as backpacks, mobile phone shells, automobile seats, sofa cushions and the like. The popularization of artificial leather brings comfortable and fashionable user experience to people. However, the frequent use in daily life is difficult to avoid, so that a lot of stains are attached to the surface of the leather, and the appearance is affected. In addition, in the field of medical products and the like, bloodstains, vomit, medical developers and the like contaminate the leather of the mattress. Meanwhile, a large amount of bacteria are bred on the surface of the leather, so that the health of a user is threatened.
However, in order to solve the problem of easy attachment of bacteria caused by poor dirt resistance of leather, chemical antibacterial agents are doped in the materials to achieve an antibacterial effect. However, the chemical antibacterial agent added to the leather has adverse effects on the environment and human body, and the antibacterial effect gradually decreases with the passage of time, and the leather is short in aging and not easy to clean.
Disclosure of Invention
In view of the above, it is necessary to provide a surface structure, a surface structure preparation method, and a medical device.
The present application provides a surface structure. The surface structure comprises a first layer structure and a plurality of nano-scale structures. The first layer structure is for being disposed on a surface of a medical device. The first layer structure is provided with a plurality of micron-sized structures which are arranged at intervals. A plurality of nano-scale structures are disposed on a plurality of the micro-scale structure surfaces.
In one embodiment, the surface structure further comprises a plurality of auxiliary structures. A plurality of auxiliary structures are disposed between the nano-scale structures and the micro-scale structures for bonding the nano-scale structures and the micro-scale structures.
In one embodiment, the surface of the first layer structure between two adjacent spaced-apart micro-scale structures constitutes a first surface. The micro-scale structure has a second surface. The second surface is parallel to the first surface. The plurality of nanoscale structures are arranged on the first surface and the second surface.
In one embodiment, the distance between the first surface and the second surface is greater than 2 microns and less than 20 microns. The width of the second surface is greater than 2 microns and less than 10 microns. The first surface has a width greater than 2 microns and less than 10 microns.
In one embodiment, a distance between the plurality of nano-scale structures disposed on the first surface and the plurality of nano-scale structures disposed on the second surface is greater than 2 microns and less than 20 microns.
In one embodiment, the present application provides a surface structure preparation method, comprising:
providing a first layer structure, wherein the first layer structure is provided with a plurality of micron-scale structures which are arranged at intervals;
and preparing a plurality of nano-scale structures on the surfaces of the plurality of micro-scale structures to obtain surface structures.
In one embodiment, the step of preparing a plurality of nano-scale structures on the surface of a plurality of the micro-scale structures to obtain surface structures includes:
carrying out ultrasonic atomization on the nano-scale structural material to form an atomized nano-scale structural material;
depositing the atomized nano-scale structural material on the surface of the first layer structure by adopting an aerosol-assisted vapor deposition method;
and cooling the ambient temperature to room temperature, forming a plurality of the nano-scale structures on the surfaces of the plurality of the micro-scale structures, and forming a second layer structure with nano-scale thickness by the plurality of the nano-scale structures.
In one embodiment, the step of preparing a plurality of nano-scale structures on the surface of a plurality of the micro-scale structures to obtain surface structures includes:
carrying out first ultrasonic dispersion pretreatment on a plurality of nano-scale structures in an organic solution;
adding a binder into the organic solution containing a plurality of the nano-scale structures to form a mixed solution;
carrying out secondary ultrasonic dispersion pretreatment on a plurality of nano-scale structures in the mixed solution;
depositing the mixed solution containing a plurality of the nano-scale structures to a plurality of the micro-scale structure surfaces;
and annealing the first layer structure deposited with a plurality of the nano-scale structures to prepare and form the surface structure.
In one embodiment, the step of preparing a plurality of nano-scale structures on the surface of a plurality of the micro-scale structures to obtain surface structures includes:
processing the micron-sized structures by adopting a low-temperature plasma surface treatment method;
providing a plurality of the nano-scale structures and subjecting the plurality of the nano-scale structures to an activation process;
and depositing the activated plurality of nano-scale structures on the surfaces of the plurality of micro-scale structures to prepare and form the surface structures.
In one embodiment, the present application provides a medical device. The medical device comprises the surface structure and the device housing in any of the above embodiments, wherein the surface structure is arranged on the surface of the device housing.
According to the surface structure and the surface structure preparation method, the first layer structure is arranged on the surface of the medical equipment and used for coating basic materials such as a backpack, a mobile phone shell, an automobile seat and a sofa cushion. The first layer structure is provided with a plurality of micron-sized structures which are arranged at intervals. The micro-scale structure is understood to mean that the dimensions of the micro-scale structure, such as width, height, etc., are all on the micrometer scale. The first layer structure is formed of a plurality of micron-scale structures of micron-scale dimensions and is disposed on a surface of the medical device. When micro-organisms of a micro-scale are settled on the surface of the medical device, the settlement and adhesion of micro-organisms of a wide range of sizes can be prevented by a plurality of the micro-scale structures. Thus, by providing a plurality of said micro-scale structures, the surface structures do not require chemical antimicrobial agents and are effective in reducing microbial adhesion. Therefore, the effect of inhibiting microorganisms such as bacteria can be achieved through a plurality of micron-sized structures, the antibacterial effect is not reduced along with the time, and the long-acting physical antibacterial capacity can be maintained.
The second layer structure is provided with a plurality of nano-scale structures arranged at intervals. The plurality of nano-scale structures are arranged on the surfaces of the plurality of micro-scale structures. The nanoscale structure is understood to mean that the dimensions of the nanoscale structure, such as width, height, and the like, are all nanometer-scale dimensions. At this time, a micro-nano multilevel structure in which a micro structure and a nano structure coexist is formed on the surface of the medical device. Through the micro-nano multilevel structure, a super-hydrophobic surface is formed, and the super-hydrophobic function of the surface can be realized.
Therefore, the purposes of physical antibiosis and hydrophobic property can be simultaneously realized through the micro-nano multilevel structure formed by the plurality of nano-scale structures and the plurality of micro-scale structures. The nano-scale structures and the micro-scale structures can realize the functions of green, pollution-free, long-acting, antibiosis and easy cleaning, and can not cause adverse effects on human bodies and environment.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure diagram of a first layer structure in an embodiment provided in the present application.
Fig. 2 is a schematic cross-sectional structure diagram of a surface structure according to an embodiment of the present disclosure.
Fig. 3 is a schematic cross-sectional structure diagram of a surface structure according to an embodiment of the present disclosure.
Fig. 4 is a schematic cross-sectional structure diagram of a surface structure according to an embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of the first layer structure in an embodiment provided in the present application.
Fig. 6 is a schematic top view of a first layer structure in an embodiment provided herein.
Fig. 7 is a schematic view of an auxiliary structure of a surface structure according to an embodiment of the present disclosure.
Fig. 8 is a schematic cross-sectional structure diagram of a surface structure according to an embodiment of the present disclosure.
Description of reference numerals:
the surface structure 100, the first layer structure 10, the second layer structure 20, the micro-scale structure 110, the nano-scale structure 210, the auxiliary structure 30, the first surface 111, the second surface 112, the side surface 113, and the groove 211.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Biological sedimentation may also be referred to as bioadhesion. Organisms include algae, bacteria, fungi, molds, barnacles, and the like. For example, small bacteria are generally less than 1 μm, ranging from 200nm to 500 nm. Large tube worms are typically larger than 200 μm, ranging from 200 μm to 500 μm.
Referring to fig. 1, a surface structure 100 is provided. The surface structure 100 comprises a first layer structure 10 and a plurality of nano-scale structures 210. The first layer 10 is arranged on a surface of a medical device. The first layer structure 10 has a plurality of micro-scale structures 110 arranged at intervals. The plurality of nano-scale structures 210 are disposed on the surface of the plurality of micro-scale structures 110.
In this embodiment, the medical equipment can be basic materials such as knapsack, cell-phone shell, car seat, sofa pad. The first layer structure 10 is arranged on the surface of the medical equipment and used for coating basic materials such as a backpack, a mobile phone shell, an automobile seat and a sofa cushion. The first layer structure 10 has a plurality of micro-scale structures 110 (shown in fig. 1) arranged at intervals. The micro-scale structures 110 are understood to mean that the dimensions of the micro-scale structures 110, such as width, height, etc., are all on the micro-scale. At this time, the first layer structure 10 is formed of a plurality of micron-sized structures 110 of a micron-scale size and is disposed on the surface of the medical device. Since bacteria are typically on the micron scale, a plurality of micro-scale structures 110 may prevent microorganisms of a wide range of sizes from settling and adhering when micro-organisms of the micron scale settle on the surface of the medical device.
Thus, by having a plurality of the micro-scale structures 110, there is no chemical antibacterial agent, and adhesion of microorganisms can be effectively reduced. Therefore, the plurality of micro-scale structures 110 can achieve an effect of inhibiting microorganisms such as bacteria, and the antibacterial effect is not reduced with the passage of time, and long-lasting physical antibacterial ability can be maintained.
Referring to fig. 2, fig. 3 and fig. 4, a plurality of the nano-scale structures 210 are disposed on the surfaces of a plurality of the micro-scale structures 110. The nano-scale structures 210 are understood to mean that the width, height, etc. of the nano-scale structures 210 are all nano-scale dimensions. At this time, a micro-nano multilevel structure in which a micro structure and a nano structure coexist is formed on the surface of the medical device. Through the micro-nano multilevel structure, a super-hydrophobic surface is formed, and the super-hydrophobic function of the surface can be realized.
Therefore, the micro-nano multilevel structure formed by the plurality of nano-scale structures 210 and the plurality of micro-scale structures 110 can simultaneously achieve the purposes of physical antibiosis and hydrophobic property. Therefore, the nano-scale structures 210 and the micro-scale structures 110 can realize the functions of long-acting antibiosis and easy cleaning without pollution, and do not cause adverse effects on human bodies and environment.
In one embodiment, the plurality of nano-scale structures 210 may be in the shape of a cone, a cylinder, a sphere, or the like. As shown in fig. 2, 3 and 4, the cross-sectional shapes of the plurality of nano-scale structures 210 are circular, triangular and square. At this time, the plurality of nano-scale structures 210 have a simple shape and structure, are easy to prepare, have a low manufacturing cost, and are advantageous to engineering implementation.
In one embodiment, the first layer structure 10 is PU, PVC leatheroid, ABS, PP, PETG, polysiloxane (silicone), cis 1, 4-polyisoprene (natural latex), fiberglass, rubber, metal, ceramic, or the like.
In one embodiment, the first layer structure 10 is artificial leather having a biomimetic sharkskin texture. The physical structure of the first layer 10 provides it with a long-lasting antimicrobial function. The nano-scale structures 210 are arranged on the basis of the physical antibacterial surface of the bionic sharkskin, so that long-acting antibacterial and easy cleaning of the artificial leather can be realized simultaneously, and the organic unification of antibacterial and easy cleaning is realized.
Referring to fig. 5, in one embodiment, the first layer structure 10 has at least one microscale and at least one adjacent feature, and the adjacent features have substantially different geometries. It is understood that the first layer structure 10 includes a plurality of the micro-scale structures 110, and the width, height and spacing distance of the plurality of micro-scale structures 110 are the same, but the lengths are different.
Referring to fig. 6, in one embodiment, the first layer structure 10 has a plurality of the micro-scale structures 110. The plurality of micron-sized structures 110 are sequentially arranged to form a diamond pattern, forming a periodic arrangement structure. Wherein, the degree of an included angle in the diamond-shaped graph is more than 90 degrees, so that the difference of the areas is improved, and the microorganism aggregation in a certain area can be reduced. Thus, when micro-organisms of a micro-scale settle on the surface of the medical device, micro-organisms of a wide range of sizes may be prevented from settling and adhering by a plurality of the micro-scale structures 110.
In one embodiment, a plurality of the micro-scale structures 110 are sequentially arranged to form a diamond pattern, and the length of the plurality of the micro-scale structures 110 is proportional to each other. By arranging the plurality of micro-scale structures 110 in proportion, the difference of the regions formed between the adjacent micro-scale structures 110 can be reduced, and the accumulation of bacteria can be reduced.
In one embodiment, the scale arrangement of the plurality of micro-scale structures 110 satisfies an arithmetic progression. When the batches of micron-level microorganisms settle on the surface of the medical device, the micron-level microorganisms in batches can be distributed and settled on the plurality of micron-level structures 110 by arranging the equal-difference arrays, so that the microorganisms are prevented from being concentrated in a certain area to be gathered.
In one embodiment, the nano-scale structures 210 may be perfluorooctyltrichlorosilane, an oligomer, a polymer, or a compound containing fluorine, silicon, or both.
Referring to fig. 7, in one embodiment, the surface structure 100 further includes a plurality of auxiliary structures 30. The auxiliary structure 30 is disposed between the nano-scale structure 210 and the micro-scale structure 110, and is used for bonding the nano-scale structure 210 and the micro-scale structure 110.
In this embodiment, the auxiliary structure 30 is disposed between the nano-scale structure 210 and the micro-scale structure 110, which is beneficial for the nano-scale structure 210 to be attached to the micro-scale structure 110, thereby improving the durability of the easy-to-clean function. The nano-scale structure 210 and the micro-scale structure 110 are more firmly bonded by the auxiliary structure 30 to form a more stable micro-nano multi-level structure. Through the micro-nano multilevel structure, a super-hydrophobic surface is formed, and the super-hydrophobic function of the surface can be realized.
In one embodiment, the auxiliary structure 30 includes a plurality of resin adhesive layers, so that the nano-scale structure 210 is more firmly adhered to the micro-scale structure 110, and the adhesion of a hydrophobic and oleophobic layer on the surface is facilitated, thereby improving the durability of the easy-to-clean function.
Referring to fig. 1 and fig. 2, in one embodiment, a surface of the first layer structure 10 between two adjacent micro-scale structures 110 is a first surface 111. The micro-scale structures 110 have a second surface 112. A plurality of the nano-scale structures 210 are disposed on the first surface 111 and the second surface 112. And the plurality of nano-scale structures 210 on the first surface 111 and the plurality of nano-scale structures 210 on the second surface 112 surround to form a plurality of grooves 211.
In the present embodiment, the micro-scale structure 110 has a second surface 112 and a plurality of side surfaces 113. The first surfaces 111 are connected to one ends of the side surfaces 113, respectively. The second surfaces 112 are connected to the other ends of the plurality of side surfaces 113, respectively. The plurality of nano-scale structures 210 are respectively disposed on the first surface 111 and the second surface 112, and cover the first surface 111 and the second surface 112. At this time, the plurality of nano-scale structures 110 disposed on the first surface 111 and the plurality of nano-scale structures 110 disposed on the second surface 112 surround to form a plurality of grooves 211 (see fig. 2), and it is understood that the plurality of nano-scale structures 110 on the first surface 111 and the plurality of nano-scale structures 110 on the second surface 112 are not in the same plane. Further, the texture structure formed by the plurality of micro-scale structures 110 is not filled by the plurality of nano-scale structures 210. Thus, after the nano-scale structures 210 are disposed on the first surface 111 and the second surface 112, the micro-scale structures 110 still have the physical characteristics of the micro-scale structures. When micro-organisms of a micro-scale settle on the surface of the medical device, the micro-organisms of a wide range of sizes are still prevented from settling and adhering by the plurality of micro-scale structures 110.
The plurality of nano-scale structures 210 and the plurality of micro-scale structures 110 form a micro-nano multi-level structure in which micro-structures and nano-structures coexist. At this time, the sedimentation and adhesion of microorganisms of various wide ranges of sizes can be prevented by a plurality of the micro-scale structures 110. The super-hydrophobic surface is formed by the micro-nano multi-level structure formed by the plurality of nano-scale structures 210 and the plurality of micro-scale structures 110, and the super-hydrophobic function of the surface can be realized. Therefore, the micro-nano multilevel structure formed by the plurality of nano-scale structures 210 and the plurality of micro-scale structures 110 can simultaneously achieve the purposes of physical antibiosis and hydrophobic property.
In one embodiment, the width of the second surface 112 (see H1 in fig. 1) is greater than 2 microns and less than 10 microns. The distance between the first surface 111 and the second surface 112 (see H2 in fig. 1) is greater than 2 micrometers and less than 20 micrometers. The width of the first surface 111 (see H3 in fig. 1) is greater than 2 microns and less than 10 microns.
In the present embodiment, the width of the second surface 112 (see H1 shown in fig. 1) is greater than 2 microns and less than 10 microns, that is, the width of the micron-scale structure 110 is greater than 2 microns and less than 10 microns. Since the size of the bacteria is in the range of 0.5 to 5 microns, the width of the second surface 112 is greater than 2 microns and less than 10 microns, so that multiple bacteria can be prevented from being accumulated on the same micro-scale structure 110.
The distance between the first surface 111 and the second surface 112 (see H2 in fig. 1) is greater than 2 micrometers and less than 20 micrometers, i.e. the height of the micro-scale structures 110 is between 2 micrometers and 20 micrometers. By setting the height of the micro-scale structures 110, the micro-scale structures 110 can form a height difference of geometric features. Furthermore, a gradient force can be applied to the attached bacteria by a plurality of the micro-scale structures 110, making it difficult to gather the bacteria at a specific location. Moreover, the height of the micron-scale structure 110 is not too high, and the production and the manufacture can be facilitated. Meanwhile, the height of the micron-sized structure 110 is set, so that the durability of the micron-sized structure 110 is improved, and the height change caused by friction in the use process is avoided.
The width of the first surface 111 (see H3 in fig. 1) is greater than 2 microns and less than 10 microns, i.e., the distance between two adjacent micro-scale structures 110 is in a range from 2 microns to 10 microns. At this time, the width of the first surface 111 is in a range of 2 micrometers to 10 micrometers, which can ensure that a large amount of bacteria are not gathered between two adjacent micro-scale structures 110 (at the depressions of the micro-structure), and is beneficial to implementing the functions of physical antibiosis and easy cleaning.
Referring to fig. 2, in one embodiment, the nano-scale structures 210 are microsphere structures. The super-hydrophobic surface is formed by a micro-nano multi-level structure formed by a plurality of the microsphere structures and a plurality of the micron-sized structures 110. Referring to fig. 3, in one embodiment, the nano-scale structure 210 is a micro-cone structure. The super-hydrophobic surface is formed by a micro-nano multi-level structure formed by a plurality of micro-cone structures and a plurality of micron-scale structures 110. Referring to fig. 4, in one embodiment, the nano-scale structure 210 is a micro-pillar structure. The super-hydrophobic surface is formed by a micro-nano multi-level structure formed by a plurality of micro-column structures and a plurality of micron-scale structures 110. In one embodiment, the nano-scale structures 210 are multi-walled carbon nanotubes. A super-hydrophobic surface is formed by a micro-nano multi-level structure formed by a plurality of multi-walled carbon nanotubes and a plurality of micro-scale structures 110. The super-hydrophobic surface can realize the surface super-hydrophobic function, so that the surface structure 100 can realize the easy-to-clean function on the basis of antibiosis.
Referring to fig. 2, in one embodiment, a distance between the plurality of nano-scale structures 210 disposed on the first surface 111 and the plurality of nano-scale structures 210 disposed on the second surface 112 (see H4 shown in fig. 2) is greater than 2 micrometers and less than 20 micrometers.
In this embodiment, H4 is greater than 2 microns and less than 20 microns, i.e., H4 is between 2 microns and 20 microns. A height difference H4 is formed between the plurality of nano-scale structures 210 disposed on the first surface 111 and the plurality of nano-scale structures 210 disposed on the second surface 112. At this time, the side surface 113 is not provided with the nano-scale structures 210, and the plurality of nano-scale structures 210 do not completely cover the first layer structure 10, so that the super-hydrophobic layer of the surface structure 100 cannot completely cover the micro-structural antibacterial layer. Therefore, the surface structure 100 forms a surface structure in which the super-hydrophobic layer, the antibacterial layer, the super-hydrophobic layer, and the antibacterial layer are sequentially arranged in a crossed manner, and the purposes of physical antibiosis and hydrophobicity can be achieved simultaneously.
By setting the height of H4, the surface structure 100 can form geometrical height difference, and can generate gradient force to attached bacteria, so that the bacteria are difficult to gather at a certain position. Meanwhile, the H4 height is set, so that the durability of the surface structure 100 is improved, and the height is prevented from changing due to friction in the using process.
Referring to fig. 8, in one embodiment, a plurality of the nano-scale structures 210 form a second layer structure 20. In this case, the second layer structure 20 is a super-hydrophobic layer. The second layer structure 20 is a low surface energy chemical such as a fluorine or silicon containing compound. The thickness of the super-hydrophobic layer is between 1 nanometer and 4 micrometers, so that the first layer structure 10 is prevented from being covered, and the long-acting antibacterial capacity of the first layer structure 10 can be ensured while the integrity of the surface texture structure of the first layer structure 10 is ensured. The second layer structure 20 satisfies a contact angle of water > 100 °, so that the surface structure 100 has an easy-to-clean function.
In one embodiment, the distance between the super-hydrophobic layer disposed on the first surface 111 and the super-hydrophobic layer disposed on the second surface 112 (see H5 shown in fig. 2) is greater than 2 microns and less than 20 microns. By setting the height of H5, the surface structure 100 can form geometrical height difference, and can generate gradient force to attached bacteria, so that the bacteria are difficult to gather at a certain position. Meanwhile, the H5 height is set, so that the durability of the surface structure 100 is improved, and the height is prevented from changing due to friction in the using process.
In one embodiment, the present application provides a surface structure preparation method, comprising:
providing a first layer structure 10 having a plurality of spaced-apart micro-scale structures 110;
a plurality of nano-scale structures 210 are fabricated on the surfaces of a plurality of the micro-scale structures 110 to obtain surface structures.
In this embodiment, a plurality of nano-scale structures 210 are prepared on the surfaces of a plurality of micro-scale structures 110, and a micro-nano multi-level structure in which a micro-scale structure and a nano-scale structure exist simultaneously is formed on the surface of the medical device. Through the micro-nano multilevel structure, a super-hydrophobic surface is formed, and the super-hydrophobic function of the surface can be realized. Meanwhile, the micro-nano multilevel structure formed by the plurality of nano-scale structures 210 and the plurality of micro-scale structures 110 can simultaneously achieve the purposes of physical antibiosis and hydrophobic property. Therefore, the nano-scale structures 210 and the micro-scale structures 110 can realize the functions of long-acting antibiosis and easy cleaning without pollution, and do not cause adverse effects on human bodies and environment.
In one embodiment, the present application provides a surface structure preparation method, comprising:
carrying out ultrasonic atomization on the nano-scale structural material to form an atomized nano-scale structural material;
depositing the atomized nano-scale structural material on the surface of the first layer structure 10 by an aerosol-assisted vapor deposition method at an ambient temperature of 90 ℃ to 200 ℃;
the ambient temperature is cooled to room temperature, a plurality of the nano-scale structures 210 are formed on the surfaces of the plurality of the micro-scale structures 110, and the plurality of the nano-scale structures 210 form the second layer structure 20 with a nano-scale thickness.
In this embodiment, the second layer structure 20 with a nanometer-scale thickness is prepared on the surface of the first layer structure 10 by an aerosol-assisted vapor deposition method. The second layer structure 20 completely covers the plurality of micro-scale structures 110. By ultrasonically atomizing the nano-scale structural material and depositing the nano-scale structural material on the surface of the first layer structure 10 in a high-temperature environment, it can be ensured that the original texture structure is not eliminated after the surface of the first layer structure 10 is treated. Meanwhile, the second layer structure 20 having a thickness of a nanometer scale is formed on the surfaces of the plurality of micro-scale structures 110. The second layer structure 20 with the nanoscale thickness and the plurality of micron-sized structures 110 form a micro-nano multi-level structure, so that the easy-cleaning capability of the first layer structure 10 is improved, and the long-acting physical antibacterial capability of the first layer structure is maintained, so that the green pollution-free long-acting antibacterial easy-cleaning surface structure 100 is prepared.
In one embodiment, the precursor of the second layer structure is atomized in an ultrasonic atomizing apparatus at a frequency of 30kHz to 50 kHz. And conveying the atomized nano-scale structural material to the reaction chamber under the nitrogen atmosphere. Meanwhile, the reaction is carried out for 3 hours at the ambient temperature of 90 ℃ to 200 ℃, the atomized nano-scale structural material is deposited on the surface of the micro-scale structure 110, and the temperature is cooled to the room temperature. In this embodiment, the frequency range during the ultrasonic atomization process is limited, and it is ensured that the original texture structure is not eliminated (i.e., the structure between the plurality of micron-scale structures 110 arranged at intervals is not damaged) after the second layer structure 20 is deposited on the surface of the first layer structure 10 at an ambient temperature of 90 ℃ to 200 ℃.
In one embodiment, the second layer structure 20 is a fluorinated silane resin layer having an oil and water repellent function.
In one embodiment, the present application provides a surface structure preparation method, comprising:
setting the first ultrasonic frequency to be 20KHz to 40KHz, carrying out first ultrasonic dispersion pretreatment on the plurality of nanoscale structures 210 in an organic solution, and maintaining for 20 minutes to 40 minutes;
adding a bonding agent with the volume fraction of 10% -50% into the organic solution containing the plurality of nano-scale structures 210 to form a mixed solution;
setting the second ultrasonic frequency to be 25KHz to 35KHz, performing second ultrasonic dispersion pretreatment on the plurality of nanoscale structures 210 in the mixed solution, and maintaining for 50 minutes to 70 minutes;
depositing the mixed solution containing a plurality of the nano-scale structures 210 on the surface of a plurality of the micro-scale structures 110, and standing for 1.5 to 3 hours at room temperature;
and annealing the first layer structure 10 deposited with the plurality of nano-scale structures 210 at an ambient temperature of 50-100 ℃ to prepare and form the surface structure.
In this embodiment, the plurality of nano-scale structures 210 are subjected to ultrasonic dispersion pretreatment in an organic solution, and then sufficiently mixed. Then, a binder is added to the organic solution containing the plurality of nano-scale structures 210, and the second ultrasonic dispersion pretreatment is continued. By setting the first ultrasonic frequency and the second ultrasonic frequency, the nano-scale structures 210, the organic solution and the adhesive can be sufficiently mixed, so that the nano-scale structures 210 are uniformly dispersed. The mixed solution containing the plurality of nano-scale structures 210 is deposited on the surfaces of the plurality of micro-scale structures 110, and is annealed, so that the surface adhesion of the first layer structure 10 is improved. Therefore, by the surface structure preparation method, the plurality of nano-scale structures 210 can be firmly attached to the plurality of micro-scale structures 110, so that a more stable micro-nano multi-level structure is formed, and the durability of an easy-to-clean function is improved.
In one embodiment, the plurality of nano-scale structures 210 are multi-walled carbon nanotubes, nano-silica, ZnO nanorods, titanium dioxide, nano-copper oxide, or the like.
In one embodiment, the organic solution is acetone solution, tetrahydrofuran, ethanol, N-dimethylformamide, petroleum ether, or the like.
In one embodiment, the adhesive is a resin, silicone, polyvinyl chloride, epoxy, or polyacrylic, or the like.
In one embodiment, the present application provides a surface structure preparation method, comprising:
processing the plurality of micron-sized structures 110 by using a low-temperature plasma surface treatment method;
providing a plurality of the nano-scale structures 210, and performing an activation process on the plurality of the nano-scale structures 210;
depositing the activated plurality of nano-scale structures 210 on the surface of the plurality of micro-scale structures 110 to prepare and form the surface structure.
In this embodiment, a plurality of the micro-scale structures 110 are processed by a low-temperature plasma surface treatment method, so that abundant active groups (hydroxyl groups, amino groups, carboxyl groups, etc.) are generated on the surface of the first layer structure 10. After the activated plurality of nano-scale structures 210 are deposited on the surfaces of the plurality of micro-scale structures 110, covalent bonding is generated, such that the plurality of nano-scale structures 210 are fixed on the surfaces of the plurality of micro-scale structures 110. Meanwhile, the plurality of micron-sized structures 110 are processed by a low-temperature plasma surface processing method, so that damage to the plurality of micron-sized structures 110 caused by high temperature can be avoided. Therefore, the plurality of nano-scale structures 210 and the plurality of micro-scale structures 110 can form a micro-nano multi-level structure by the surface structure preparation method, so that an oleophobic and hydrophobic function is realized, and meanwhile, the physical antibacterial capability can be ensured.
In one embodiment, the plurality of nano-scale structures 210 and the plurality of micro-scale structures 110 may be bonded together by van der waals force, chemical covalent bond, electrostatic adsorption, ion bonding force, atomic coupling, chelation, host-guest interaction, and the like, so as to make the hydrophobic layer have durable hydrophobic property.
In one embodiment, the surface structure preparation method may further adopt a chemical etching method, a hydrothermal method, or a sol-gel method to prepare a plurality of the nano-scale structures 210 on the surfaces of the plurality of the micro-scale structures 110.
In one embodiment, the present application provides an article. The article includes the surface structure 100 described in any of the embodiments above. The surface structure 100 is disposed on a surface of the article.
In this embodiment, the article may be a backpack, a cell phone case, a car seat, a sofa cushion, or the like. The surface structure 100 has easy-to-clean and long-lasting antimicrobial properties. Thus, the surface structure 100 can improve the problem that the traditional product is not resistant to dirt and is difficult to clean.
In one embodiment, the present application provides a medical device. The medical device comprises the surface structure 100 and a device housing, wherein the surface structure 100 is arranged on the surface of the device housing. The medical equipment can be a head support cushion, a sickbed cushion and the like applied to the medical field. Therefore, the medical equipment with the surface structure 100 has the advantages of being easy to clean and long-acting antibacterial performance, reducing cross infection of sick bed bacteria to patients and greatly improving user experience.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A surface structure, characterized in that the surface structure comprises:
a first layer structure for being disposed on a surface of a medical device, the first layer structure having a plurality of micron-scale structures disposed at intervals;
and the nano-scale structures are arranged on the surfaces of the micro-scale structures.
2. The surface structure of claim 1, further comprising:
and the auxiliary structures are arranged between the nano-scale structures and the micro-scale structures and are used for bonding the nano-scale structures and the micro-scale structures.
3. The surface structure according to claim 1, wherein the surface of the first layer structure between two adjacent spaced-apart micro-scale structures constitutes a first surface, the micro-scale structures having a second surface;
a plurality of the nano-scale structures are arranged on the first surface and the second surface;
and the plurality of nano-scale structures on the first surface and the plurality of nano-scale structures on the second surface surround to form a plurality of grooves.
4. The surface structure according to claim 3, characterized in that the distance between the first surface and the second surface is greater than 2 microns and less than 20 microns;
the width of the second surface is greater than 2 microns and less than 10 microns;
the first surface has a width greater than 2 microns and less than 10 microns.
5. The surface structure according to claim 3, wherein a distance between the plurality of nano-scale structures disposed on the first surface and the plurality of nano-scale structures disposed on the second surface is greater than 2 microns and less than 20 microns.
6. A method of preparing a surface structure, comprising:
providing a first layer structure, wherein the first layer structure is provided with a plurality of micron-scale structures which are arranged at intervals;
and preparing a plurality of nano-scale structures on the surfaces of the plurality of micro-scale structures to obtain surface structures.
7. The method of claim 6, wherein the step of preparing a plurality of nano-scale structures on the surfaces of the micro-scale structures to obtain surface structures comprises:
carrying out ultrasonic atomization on the nano-scale structural material to form an atomized nano-scale structural material;
depositing the atomized nano-scale structural material on the surface of the first layer structure by adopting an aerosol-assisted vapor deposition method;
and cooling the ambient temperature to room temperature, forming a plurality of the nano-scale structures on the surfaces of the plurality of the micro-scale structures, and forming a second layer structure with nano-scale thickness by the plurality of the nano-scale structures.
8. The method of claim 6, wherein the step of preparing a plurality of nano-scale structures on the surfaces of the micro-scale structures to obtain surface structures comprises:
carrying out first ultrasonic dispersion pretreatment on a plurality of nano-scale structures in an organic solution;
adding a binder into the organic solution containing a plurality of the nano-scale structures to form a mixed solution;
carrying out secondary ultrasonic dispersion pretreatment on a plurality of nano-scale structures in the mixed solution;
depositing the mixed solution containing a plurality of the nano-scale structures to a plurality of the micro-scale structure surfaces;
and annealing the first layer structure deposited with a plurality of the nano-scale structures to prepare and form the surface structure.
9. The method of claim 6, wherein the step of preparing a plurality of nano-scale structures on the surfaces of the micro-scale structures to obtain surface structures comprises:
processing the micron-sized structures by adopting a low-temperature plasma surface treatment method;
providing a plurality of the nano-scale structures and subjecting the plurality of the nano-scale structures to an activation process;
and depositing the activated plurality of nano-scale structures on the surfaces of the plurality of micro-scale structures to prepare and form the surface structures.
10. A medical device, comprising a surface structure according to any one of claims 1 to 5 and a device housing, the surface structure being provided on a surface of the device housing.
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