CN113881268A - Protective film, preparation method thereof, appearance piece and terminal - Google Patents

Protective film, preparation method thereof, appearance piece and terminal Download PDF

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Publication number
CN113881268A
CN113881268A CN202110706491.1A CN202110706491A CN113881268A CN 113881268 A CN113881268 A CN 113881268A CN 202110706491 A CN202110706491 A CN 202110706491A CN 113881268 A CN113881268 A CN 113881268A
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valence
protective film
layer
variable
metal element
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安亚斌
贺海明
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Honor Device Co Ltd
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Honor Device Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Plant Pathology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The embodiment of the application provides a protective film, a preparation method thereof, an appearance piece and a terminal. The protective film comprises an antibacterial layer, and the antibacterial layer comprises cations of variable valence metal elements; wherein, at normal temperature, the stable valence state of the cation of the variable valence metal element is a high valence state, and the cation of the variable valence metal element with the high valence state has oxidizing property capable of oxidizing bacteria.

Description

Protective film, preparation method thereof, appearance piece and terminal
Technical Field
The application relates to the technical field of preparation of protective films, in particular to a protective film, a preparation method of the protective film, an appearance piece with the protective film and a terminal.
Background
With the penetration of terminals such as mobile phones and tablets in various scenes in life, many mobile phones are not away from the hands, so that the sanitation and safety of the mobile phones become a concern. In particular, after the existing mobile phone is used for a long time, the surface (e.g., the surface of the cover plate) which is contacted with the user is easy to grow bacteria (e.g., escherichia coli), and the health of the user is affected.
Disclosure of Invention
A first aspect of the present application provides a protective film comprising an antibacterial layer comprising cations of a valence-variable metal element; wherein, at normal temperature, the stable valence state of the cation of the variable valence metal element is a high valence state, and the cation of the variable valence metal element with the high valence state has oxidizing property capable of oxidizing bacteria.
In the antibacterial layer of the protective film, cations of the variable valence metal elements have a high valence state and a low valence state. At normal temperature (i.e. at the use temperature of most users), the stable valence state of the cation of the valence-variable metal element is a high valence state and has oxidation property. When the cation of the high valence state variable valence metal element contacts with bacteria (such as bacillus, coccus, etc.), the cation of the high valence state variable valence metal element can capture electrons, generate oxidation reaction, and then be reduced to the cation of the low valence state variable valence metal element. Meanwhile, the bacteria are oxidized by the cations of the valence-variable metal elements in a high valence state, and lose activity, and are further killed. In addition, because the cations of the variable valence metal elements in the low valence state are unstable at normal temperature, the cations can release electrons to return to the high valence state again, and the cations of the variable valence metal elements in the high valence state still have oxidizing property when meeting bacteria again, so that the bacteria can be sterilized.
In this way, the bacteria are oxidized by the high-valence oxidizing cations of the valence-variable metal elements, so that the bacteria are inactivated, and the sterilization effect is achieved. The high valence state of the variable valence metal element is reduced to the low valence state of the variable valence metal element during the sterilization process, but the low valence state of the variable valence metal element is unstable at normal temperature, and the variable valence metal element spontaneously returns to the high valence state, namely the oxidation of the variable valence metal element is recovered, and the sterilization is continued.
In one embodiment, the valence-altering metal element comprises at least one of ytterbium, iron, chromium, nickel, terbium, and erbium. The positive ions of ytterbium (Yb), iron (Fe), chromium (Cr), nickel (Ni), terbium (Td) and erbium (Er) have two valence states, namely a high valence state (trivalent) and a low valence state (divalent), bacteria can be inactivated by the oxidation of the high valence states of the variable valence metal elements on the bacteria, so that the sterilization effect is achieved, and the low valence states of the variable valence metal elements are unstable at normal temperature and spontaneously return to the high valence state, namely, the oxidation of the variable valence metal elements is recovered, and the sterilization is continued.
In one embodiment, the valence-altering metal element is ytterbium (Yb). Yb of3+Is sufficiently oxidizing to achieve a bactericidal effect.
In another embodiment, the valence-altering metal elements include ytterbium (Yb) and iron (Fe). By adding Yb3+In the antibacterial layer of (2) is increased by Fe3+The oxidation of the antibacterial layer can be further enhanced, and the sterilization effect of the antibacterial layer is further enhanced.
In one embodiment, the antibacterial layer further includes a material capable of providing an octahedral structure or a face-centered cubic structure. The stable valence state of the variable valence metal element is a high valence state (trivalent), when the cation of the trivalent variable valence metal element is injected into an octahedral structure or a face-centered cubic structure, a vacancy can be formed, the vacancy has strong attraction to electrons, and then when the cation of the high valence state variable valence metal element in the antibacterial layer meets bacteria, the electron is captured more easily, so that the bacteria are oxidized, inactivated and killed.
In one embodiment, the material capable of providing an octahedral structure or a face-centered cubic structure includes at least one of titanium dioxide, silicon oxide, and an organosilicon compound. That is, the antibiotic layer may be an inorganic substance such as titanium oxide or silicon oxide impregnated with cations of a valence-variable metal element; the antibacterial layer may also be an organic substance such as silicone impregnated with cations of a variable valence metal element. In other embodiments, the material can provide an octahedral structure or a face-centered cubic structure, but is not limited thereto.
In one embodiment, the protective film further comprises other functional coatings disposed in a layer overlying the antimicrobial layer, the other functional coatings comprising at least one of a stain-resistant layer, an anti-fingerprint layer, an anti-glare layer, and an anti-reflective layer. For example, the stain-resistant layer may be a perfluoropolyether siloxane so that the oil and water on the surface of the protective film automatically shrink into oil or water droplets that are difficult to adhere to the surface of the stain-resistant layer.
A second aspect of the present application provides a method for preparing a protective film, which comprises forming an antibacterial layer comprising cations of a valence-variable metal element; wherein, at normal temperature, the stable valence state of the cation of the variable valence metal element is a high valence state, and the cation of the variable valence metal element with the high valence state has oxidizing property capable of oxidizing bacteria.
In one embodiment of the method of manufacturing, the forming the antibiotic layer includes: forming a gel comprising cations of a valence-altering metal element on a surface of a substrate; and sintering and curing the gel to obtain the antibacterial layer.
In one embodiment of the method of manufacturing, the forming the antibiotic layer includes: forming a film layer of a material capable of providing an octahedral structure or a face-centered cubic structure on a surface of a substrate; and injecting cations of the valence-variable metal elements into the film layer by using an ion injection method so as to obtain the antibacterial layer.
In an embodiment of the method of making, the material capable of providing an octahedral structure or a face centered cubic structure includes at least one of titanium dioxide, silicon oxide, organosilicon compound.
In one embodiment of the method of making, the variable valence metallic element comprises at least one of ytterbium, iron, chromium, nickel, terbium, erbium. The cation of the variable valence metal element comprises Yb3+、Fe3+、Cr3+、Ni3+、Td3+、Er3+At least one of (1).
In an embodiment of the preparation method, after the step of forming the antibacterial layer, the method further comprises forming other functional coatings on the surface of the antibacterial layer far away from the substrate by physical deposition or coating. For example, at least one of a stain-resistant layer, an anti-fingerprint layer, an anti-glare layer, and an anti-reflection layer may be formed by physical deposition, coating, or the like.
The third aspect of the present application provides an appearance piece, which includes a body and a protective film on the body, wherein the protective film is the above protective film. The antibacterial layer is used for killing bacteria on the outer surface of the appearance piece, which is in contact with a user. Because the appearance piece comprises the protective film, bacteria on the appearance piece can be killed by the antibacterial layer, so that the bacteria can be prevented from being spread to a human body, and the health level of a user is improved.
In one embodiment, the material of the body comprises at least one of metal, ceramic, glass and plastic.
In one embodiment, the appearance piece is a cover plate, and the cover plate comprises a substrate and a protective film positioned on the substrate. The protective film is sold as a cover plate of consumer electronic products such as mobile phones in an integrated mode, and the protective film is arranged on the surface (such as a touch surface) of the substrate, which is in contact with a user, so that bacteria on the surface, which is in contact with the user, of the cover plate can be killed, and the protective film is prevented from spreading to a human body.
In one embodiment, the appearance member may also be a household appliance housing (e.g., an operation panel of a refrigerator having touch keys), an elevator key, or the like having antibacterial requirements.
A fourth aspect of the present application provides a terminal including the appearance member described above. The terminal can be a mobile terminal product such as a mobile phone, a tablet personal computer and an intelligent wearable product; or household appliances such as refrigerators, televisions, microwave ovens, electric cookers, and the like; also an elevator.
Drawings
Fig. 1 is a schematic plan view of a terminal according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the terminal shown in fig. 1.
Fig. 3 is a schematic cross-sectional view of the cover plate of fig. 1 along the line III-III.
Fig. 4 is a schematic view illustrating the principle of the antibacterial property of the antibacterial layer according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a cover plate according to another embodiment of the invention.
Fig. 6 is a schematic flow chart illustrating a method for manufacturing a protective film according to an embodiment of the invention.
Fig. 7 is a schematic flow chart of a method for preparing a protective film according to another embodiment of the invention.
Description of the main elements
Terminal 100
Cover plate 10
Middle part 101
Edge portion 102
Substrate 12
Protective film 14
Antibacterial layer 142
Other functional coating 144
Display screen 20
Support structure 30
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
At present, in the daily use process of terminals such as mobile phones and tablets, bacteria (such as escherichia coli) are easy to breed on the surfaces (such as the surfaces of cover plates) contacted with users, and the health of the users is affected. To this end, embodiments of the present invention provide a terminal, which includes an appearance member, wherein a protective film is disposed on an outer surface of the appearance member, i.e., a surface that a user contacts, and the protective film includes an antibacterial layer to kill bacteria on the surface of the appearance member and prevent the bacteria from spreading to the human body, thereby improving the health level of the user.
The terminal can be a mobile terminal product such as a mobile phone, a tablet personal computer and an intelligent wearable product; or household appliances such as refrigerators, televisions, microwave ovens, electric cookers, and the like; also an elevator.
The appearance piece can be a cover plate of the terminal, such as a touch cover plate of a mobile phone. The appearance piece can also be a household appliance shell (such as an operation panel with touch keys of a refrigerator), an elevator key and other devices with antibacterial requirements. The appearance piece comprises a body and a protective film positioned on the body, wherein the protective film is internally provided with an antibacterial layer, and the antibacterial layer is used for killing bacteria on the outer surface of the appearance piece, which is in contact with a user. Wherein, the material of the body is at least one of metal, ceramic, glass and plastics.
In the embodiment of the present invention, the protective film may be sold as a product independently; or the protective film is arranged on the body of the appearance piece and sold as a part of the appearance piece; alternatively, the protective film is sold as part of the terminal. An example of the protective film being sold as part of the outer appearance member is: the appearance piece is the apron, and the body is the basement, and the protection film sets up in the basement, and the apron independently sells as the product. That is, the protective film can be sold as a cover plate of consumer electronics such as mobile phones; or can be sold outside by a separated protective film.
The following description will be made by taking the terminal as a mobile phone and the appearance piece as a cover plate of the mobile phone, with reference to the accompanying drawings.
As shown in fig. 1 and 2, the terminal 100 is a mobile phone, and includes a cover 10, a display 20 and a support structure 30. The cover 10 defines a display surface of the terminal 100. The display screen 20 is used for displaying pictures. The support structure 30 may be a housing (also commonly referred to as a back cover or battery cover). The cover plate 10 and the support structure 30 cooperate to form a receiving space (not shown), and the display screen 20 is located in the receiving space between the cover plate 10 and the support structure 30. In addition, other functional components/electronic components, such as a mainboard, a battery and the like, can be arranged in the accommodating space.
The cover plate 10 shown in fig. 2 is a 2.5D cover plate 10. The cover plate 10 includes a middle portion 101 and an edge portion 102 extending from the middle portion 101. The intermediate portion 101 is substantially flat and the edge portion 102 has a certain arc-shaped design. In other embodiments, the cover plate 10 may also be a 2D cover plate or a 3D cover plate. Wherein, the 2D cover plate means that the cover plate 10 is substantially flat, and points on the surface thereof are substantially located on the same plane, without an arc design. The 3D cover plate means that the middle and edge portions of the cover plate 10 are both designed in an arc shape. The terminal that has the 3D apron, the radian of its 3D apron can laminate the palm more, brings good feeling for functions such as typing, and 3D curved surface shows can increase visual area moreover, more accords with the radian of human retina, brings better visual experience for seeing shadow and recreation.
In one embodiment, the display 20 is a flexible Organic Light Emitting Diode (OLED) display, which may include an OLED array layer, a driving circuit layer, a back panel, and the like. The OLED display screen has the advantages of bright color, high contrast, high response speed and the like, and the flexible OLED display screen has the characteristics of flexibility and deformability, and has great potential in the aspects of special-shaped display such as bendable mobile phones and curved surface display. When the display screen 20 is a flexible OLED display screen, the support structure 30 is used to support the flexible OLED display screen, and the material thereof is, for example, foam.
In other embodiments, the display 20 may be a liquid crystal display, a micro LED display, or the like.
Fig. 3 is a schematic cross-sectional view of the cover plate 10 according to an embodiment. As shown in fig. 3, the cover plate 10 includes a substrate 12 and a protective film 14 on the substrate 12. The protective film 14 includes an antibacterial layer 142. The antibiotic layer 142 completely covers the surface of the cap plate 10. In other embodiments, the antibiotic layer 142 covers a portion of the cap plate 10 to partially sterilize. The material of the substrate 12 is, for example, transparent glass, transparent plastic, or the like, and the substrate 12 is not limited to a transparent material. The antibiotic layer 142 includes cations of the valence-variable metal elements. At normal temperature, the stable valence state of the cation of the variable valence metal element is a high valence state, and the cation of the variable valence metal element with the high valence state has oxidizing property, so that bacteria can be oxidized to realize an antibacterial function. Wherein, the substance in high valence state can absorb an electron and become low valence state or electric neutrality, the process is called reduction reaction, and the substance is called oxidant; similarly, a substance which is oxidized by being deprived of electrons undergoes an oxidation reaction, and this substance is referred to as a reducing agent.
In the antibacterial layer 142, the cations of the variable valence metal elements have a high valence state and a low valence state. At normal temperature (i.e. at the use temperature of most users), the stable valence state of the cation of the valence-variable metal element is a high valence state and has oxidation property. When the cation of the high valence state variable valence metal element contacts with bacteria (such as bacillus, coccus, etc.), the cation of the high valence state variable valence metal element can capture electrons, generate oxidation reaction, and then be reduced to the cation of the low valence state variable valence metal element. Meanwhile, the bacteria are oxidized by the cations of the valence-variable metal elements in a high valence state, and lose activity, and are further killed. In addition, because the cations of the variable valence metal elements in the low valence state are unstable at normal temperature, the cations can release electrons to return to the high valence state again, and the cations of the variable valence metal elements in the high valence state still have oxidizing property when meeting bacteria again, so that the bacteria can be sterilized.
In this way, the bacteria are oxidized by the high-valence oxidizing cations of the valence-variable metal elements, so that the bacteria are inactivated, and the sterilization effect is achieved. The high valence state of the variable valence metal element is reduced to the low valence state of the variable valence metal element during the sterilization process, but the low valence state of the variable valence metal element is unstable at normal temperature, and the variable valence metal element spontaneously returns to the high valence state, namely the oxidation of the variable valence metal element is recovered, and the sterilization is continued.
In one embodiment, the valence-variable metal element includes at least one of ytterbium (Yb), iron (Fe), chromium (Cr), nickel (Ni), terbium (Td), and erbium (Er). The positive ions of the variable valence metal elements of ytterbium (Yb), iron (Fe), chromium (Cr), nickel (Ni), terbium (Td) and erbium (Er) have two valence states of high valence (trivalent) and low valence (divalent), and the oxidizing size is generally Yb3+＞Fe3 +＞Cr3+＞Ni3+＞Td3+＞Er3+。
In one embodiment, the valence-altering metal element is ytterbium (Yb). Yb of3+Is sufficiently oxidizing to achieve a bactericidal effect.
In one embodiment, the valence-variable metal elements include ytterbium (Yb) and iron (Fe). By adding Yb3+The antibacterial layer 142 is added with Fe3+The oxidation of the antibiotic layer 142 may be further enhanced, thereby further enhancing the sterilization effect of the cover plate 10.
In one embodiment, the antibiotic layer 142 further includes a material capable of providing an octahedral structure or a face-centered cubic structure. The stable valence state of the variable valence metal element is a high valence state (trivalent), when the cation of the trivalent variable valence metal element is injected into the octahedral structure or the face-centered cubic structure, a vacancy is formed, and the vacancy has strong attraction to electrons, so that when the cation of the variable valence metal element in the high valence state in the antibacterial layer 142 meets bacteria, the electron is more easily captured, so that the bacteria are oxidized, inactivated and killed.
In one embodiment, the material capable of providing an octahedral structure or a face centered cubic structure includes titanium dioxide (TiO)2) Silicon oxide (SiO)x) And an organosilicon compound. That is to sayIn other words, the antibiotic layer 142 may be an inorganic substance such as titanium oxide or silicon oxide into which cations of a valence-variable metal element are injected; the antibacterial layer 142 may be an organic material such as silicone impregnated with cations of a valence-variable metal element. In other embodiments, the material can provide an octahedral structure or a face-centered cubic structure, but is not limited thereto.
In fig. 4, the example of the variable valence metal element being ytterbium (Yb) shows the dynamic equilibrium process of the metal cations in low valence state and high valence state in the antibacterial layer 142 during the sterilization process. At normal temperature, the stable valence state of Yb cation is high valence state. Thus, Yb at room temperature2+Delocalizing the electron to release the electron and return to the high valence Yb3+(ii) a Yb when encountering a reducing agent such as a virus3+Will capture an electron, undergo oxidation reaction and be reduced into Yb2+While the reducing agent is oxidized (i.e., the virus is killed), Yb is present at room temperature2+Unstable and will return to the high valence state (trivalent).
Note that, the stable valence state of the variable valence metal element at room temperature is a high valence state, and an explanation can be given by using the Kondo effect (Kondo effect). According to the common metal conductors such as copper, gold, silver, aluminum and the like, when magnetic impurities (chromium, manganese, iron) are added, the resistance-temperature change curve follows the following rule that the resistance is monotonically decreased along with the temperature decrease and finally tends to be residual resistance determined by impurity scattering. Where the temperature of this limit is referred to as the material's rattan temperature. Caulis et folium piperis indicates that the appearance of the electrical resistance minima, associated with the presence of local magnetic moments of the impurity atoms, is a result of exchange coupling of the magnetic impurity ions with the conducting electrons. Electrons excited by heat or electric field in the conductor are scattered by local magnetic impurities in the process of transmission, so that the magnetic impurity atoms generate spin reversal, and the reversed magnetic atoms act on the electrons again. Magnetic impurities act as a viscous effect, dragging the scattering of electrons, known as quantum tunneling by the magnet. In summary, in a conductor doped with magnetic impurities, there are two balances: one is the interaction of electron scattering and magnetic spin, which becomes stronger as temperature decreases, manifesting as an increase in resistance. The other is electron scattering and phonon action, and the action is weakened along with the reduction of temperature. As a decrease in resistance.
A valence-variable metal element, such as the metal ytterbium, which is a typical magnetic physical material, follows the proximal rattan resonance. Wherein ytterbium has two valence states3+ and Yb2+Yb in the host, Yb at room temperature2+Will release electrons and absorb heat, leaving the system in a high energy state. Because the normal temperature using scene of the terminals such as mobile phones and the like is higher than the temperature of the proximal rattan of Yb, Yb can turn into Yb3+Is present in the host.
Fig. 5 is a schematic cross-sectional view of a cover plate 10 according to another embodiment of the present invention, which is different from the cover plate 10 in fig. 3 in that: the protective film 14 further includes another functional coating layer 144 laminated with the antibacterial layer 142. In fig. 5, the other functional coating 144 is positioned on the side of the antimicrobial layer 142 away from the substrate 12.
In one embodiment, the other functional coating 144 includes at least one of a stain resistant layer, an anti-fingerprint layer, an anti-glare layer, and an anti-reflective layer. For example, the stain resistant layer may be a perfluoropolyether siloxane so that the oil and water on the surface of the protective film 14 automatically shrink into droplets or drops that are difficult to adhere to the stain resistant layer surface so that the user can easily clean the oil and water stains. The other functional coatings 144 may be formed by physical deposition or coating.
Fig. 6 is a diagram illustrating a method for manufacturing a protective film according to an embodiment of the invention. As shown in fig. 6, the preparation method includes the following steps.
S11: a gel is formed comprising cations of the valence-altering metal element.
S12: the gel is coated on the surface of a substrate.
S13: and sintering and curing the gel to obtain the antibacterial layer.
In one embodiment, the cation of the variable valence metal element comprises Yb3+、Fe3+、Cr3+、Ni3+、Td3+、Er3+At least one of (1).
In one embodiment, polymer compounding is employedPreparation of Yb from Polyethylene glycol (PEG)3+And Fe3+The gel is coated on the surface of the substrate, and the antibacterial layer is obtained after sintering and curing. The substrate may be glass or plastic.
In one embodiment, the protective film further comprises other functional coatings. After the step of forming the antibacterial layer, forming other functional coatings on the surface of the antibacterial layer far away from the substrate by adopting a physical deposition or coating mode and the like.
In one embodiment, Yb obtained by calcining at 1050 ℃ with polyethylene glycol gel3+Doped nano TiO2And (3) powder. The results show that, at room temperature, Yb is present3+The mixed concentration of (2) is 1.0mg/mL, and the initial concentration of the bacterial liquid is 3X 107cfu/ml, the pH value of the bacterial liquid is 7.4, the light source is 150W, and after irradiation for 90min, the killing rate of bacteria reaches 93.8 percent. Since the cultured bacteria are in a suppressed state after being mixed, the purpose of the light source irradiation is to allow the culture medium to release nutrients necessary for the growth of the bacteria, simulate the growth environment of the bacteria in daily life, and observe the killed state of the bacterial colonies. The bacteria may be staphylococcus.
Fig. 7 is a view illustrating a method for manufacturing a protective film according to another embodiment of the present invention. As shown in fig. 7, the preparation method includes the following steps.
S21: a film layer of a material capable of providing an octahedral structure or a face-centered cubic structure is formed on a surface of a substrate.
S22: and injecting cations of the variable valence metal elements into the film layer by using an ion injection method so as to obtain the antibacterial layer.
In one embodiment, the material capable of providing an octahedral structure or a face-centered cubic structure is silicon oxide (SiO)x) The cation of the variable valence metal element includes Yb3+、Fe3+、Cr3+、Ni3+、Td3+、Er3+At least one of (1).
In one embodiment, step S21 is forming a layer of silicon oxide on the surface of the substrate using Plasma Enhanced Chemical Vapor Deposition (PECVD). Step S22 Yb is implanted into silicon oxide by an ion implantation method3+。
In one embodiment, the protective film further comprises other functional coatings. After the step of forming the antibacterial layer, forming other functional coatings on the surface of the antibacterial layer far away from the substrate by adopting a physical deposition or coating mode and the like.
In the preparation method of the protective film, the gel method has the advantages of easy operation and preparation, convenient and quick research on sterilization characteristics, and particularly convenient laboratory research; the ion implantation method can implant ions on the substrate at high speed, and is convenient for industrial mass production.
Although the present application has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present application.

Claims (14)

1. A protective film characterized by comprising an antibacterial layer comprising cations of a valence-variable metal element;
wherein, at normal temperature, the stable valence state of the cation of the variable valence metal element is a high valence state, and the cation of the variable valence metal element in the high valence state has oxidizing property capable of oxidizing bacteria.
2. The protective film according to claim 1, wherein the valence-variable metal element comprises at least one of ytterbium, iron, chromium, nickel, terbium, and erbium.
3. The protective film of claim 1, wherein the antimicrobial layer further comprises a material capable of providing an octahedral structure or a face-centered cubic structure.
4. The protective film according to claim 3, wherein the material capable of providing an octahedral structure or a face-centered cubic structure comprises at least one of titanium dioxide, silicon oxide, and an organosilicon compound.
5. The protective film according to claim 1, further comprising another functional coating layer provided in a layer stack with the antibacterial layer, the other functional coating layer comprising at least one of a stain-resistant layer, an anti-fingerprint layer, an antiglare layer, and an anti-reflection layer.
6. A preparation method of a protective film is characterized by comprising the steps of forming an antibacterial layer, wherein the antibacterial layer comprises cations of variable valence metal elements;
wherein, at normal temperature, the stable valence state of the cation of the variable valence metal element is a high valence state, and the cation of the variable valence metal element in the high valence state has oxidizing property capable of oxidizing bacteria.
7. The method for producing a protective film according to claim 6, wherein forming the antibacterial layer comprises:
forming a gel comprising cations of the valence-altering metal element on a surface of a substrate; and
and sintering and curing the gel to obtain the antibacterial layer.
8. The method for producing a protective film according to claim 6, wherein forming the antibacterial layer comprises:
forming a film layer of a material capable of providing an octahedral structure or a face-centered cubic structure on a surface of a substrate; and
and injecting cations of the valence-variable metal elements into the film layer by using an ion injection method, thereby obtaining the antibacterial layer.
9. The method for producing a protective film according to claim 8, wherein the material capable of providing an octahedral structure or a face-centered cubic structure includes at least one of titanium dioxide, silicon oxide, and an organosilicon compound.
10. The method for producing a protective film according to any one of claims 6 to 9, wherein the valence-variable metal element includes at least one of ytterbium, iron, chromium, nickel, terbium, and erbium.
11. An appearance member comprising a body and a protective film on the body, wherein the protective film is as defined in any one of claims 1 to 5.
12. The appearance of claim 11 wherein the body comprises a material selected from the group consisting of metal, ceramic, glass, and plastic.
13. An appearance element according to claim 11, wherein the appearance element is a cover plate comprising a base and the protective film on the base.
14. A terminal, characterized in that it comprises a facing element according to any one of claims 11 to 13.
CN202110706491.1A 2021-06-24 2021-06-24 Protective film, preparation method thereof, appearance piece and terminal Pending CN113881268A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101125970A (en) * 2006-08-18 2008-02-20 中国科学院金属研究所 Antibiotic coat
CN103909699A (en) * 2013-01-08 2014-07-09 鸿富锦精密工业（深圳）有限公司 Coated member and making method thereof
CN107365516A (en) * 2017-08-25 2017-11-21 安徽智博新材料科技有限公司 A kind of antifouling Furniture panel of antibacterial and its preparation technology

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101125970A (en) * 2006-08-18 2008-02-20 中国科学院金属研究所 Antibiotic coat
CN103909699A (en) * 2013-01-08 2014-07-09 鸿富锦精密工业（深圳）有限公司 Coated member and making method thereof
CN107365516A (en) * 2017-08-25 2017-11-21 安徽智博新材料科技有限公司 A kind of antifouling Furniture panel of antibacterial and its preparation technology

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Application publication date: 20220104