Luminescent antibacterial glass composition and method for preparing luminescent antibacterial glass powders

Abstract

To provide a luminescent antibacterial glass composition and a method for preparing luminescent antibacterial glass powders, in which a luminescent function is imparted to the antibacterial glass composition, such that whether an antibacterial agent is properly contained in a home appliance component can be directly identified using an external light source.SOLUTION: In addition to an antibacterial function, a luminescent oxide, which is an active agent substance with a luminescent property in a glass structure, is added to an antibacterial glass composition. In one aspect, there is provided a luminescent antibacterial glass composition that includes 20 to 40 wt.% of SiO2; 1.5 to 10 wt.% of B2O3; 20 to 40 wt.% of ZnO; 5 to 10 wt.% of Al2O3; 5 to 10 wt.% of MgO; a total of 5 to 30 wt.% of at least one of Na2O, K2O, and CaO; a total of 0.1 to 5 wt.% of at least one of CuO and Ag2O; and 0.1 to 2 wt.% of a luminescent oxide.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an antibacterial glass composition having a light-emitting function and a method for producing the antibacterial glass powder thereof. 〔Related Art〕 This application is accompanied by a claim of priority under Article 4 of the Paris Convention based on Korean Patent Application No. 10-2023-0189729 (filing date: December 22, 2023 / DAS code: 6310), and the present invention of this application is based on the content disclosed in the said Korean patent application. For reference, the contents of the specification, claims, and drawings of the said Korean patent application are incorporated into a part of the specification of this application.

Background Art

[0002] Microorganisms such as bacteria, fungi, and mold are unevenly distributed in our living spaces, such as in water purifiers, refrigerators, ovens, washing machines, etc. If microorganisms enter the human body, they can cause life-threatening infections. Therefore, antibacterial glass compositions capable of controlling the spread of microorganisms are required for household appliances such as water purifiers, refrigerators, ovens, and washing machines.

[0003] Among the parts using plastic injection products in these household appliances, bacteria and mold multiply in the parts exposed to moisture, causing problems in appearance or the usage environment.

[0004] The bacteria inhabiting household appliances are very diverse, and although the main strains may differ depending on the part, Pseudomonas aeruginosa generally has a high possibility of inhabiting the parts exposed to moisture.

[0005] Therefore, the antibacterial agent must ensure antibacterial performance against these strains. Also, the antibacterial agent must be strictly selected from materials with low toxicity to the human body and the environment and materials that ensure durability against high temperatures.

[0006] Thus, antibacterial agents are used as additives in parts of home appliances that require hygiene. Usually, antibacterial agents are added to the base material of parts of home appliances, such as plastics, at around 1 wt%, so it is difficult to visually confirm whether the antibacterial agent is contained in the parts of home appliances, and it takes a considerable number of days to confirm its effectiveness in a state of being exposed to the pollution source.

[0007] And even for product manufacturers, the methods for confirming whether the antibacterial agent is contained as designed in the parts of home appliances containing the antibacterial agent received from cooperative companies are limited.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0009] An object of the present invention is to provide a glass composition containing Al2O3, MgO, etc. that act as a host structure in the glass composition with antibacterial function in order to impart a light-emitting function to the antibacterial agent manufactured from the glass composition with antibacterial function, and further add Eu2O3, Tb4O7, etc. that are activator substances of the light-emitting function, and to provide a light-emitting antibacterial glass composition having both antibacterial function and light-emitting function and a method for manufacturing the antibacterial glass powder thereof.

[0010] Furthermore, an object of the present invention is to apply the antibacterial glass powder to home appliances, to attempt to impart an antibacterial function, to introduce a light-emitting function, to enable visual confirmation of whether the antibacterial agent is contained in the parts, and to provide a light-emitting antibacterial glass composition having convenience for quality inspection and a method for manufacturing the antibacterial glass powder thereof.

[0011] Another object of the present invention is to provide a luminescent antibacterial glass composition and a method for producing the antibacterial glass powder thereof, which are provided with a luminescent function and can immediately confirm whether an antibacterial agent is correctly contained in parts of home appliances by an external light source.

[0012] The object of the present invention is not limited to the objects mentioned above. Other objects and advantages of the present invention not mentioned can be understood from the following description and can be more clearly understood from the examples of the present invention. Also, it can be easily understood that the objects and advantages of the present invention can be realized by the means and their combinations shown in the claims.

Means for Solving the Problems

[0013] 〔One Aspect of the Present Invention〕 In the present invention, as one of its aspects, the following invention is proposed. 〔Claim 1〕 A luminescent antibacterial glass composition, comprising: 20 to 40% by weight of SiO2; 1.5 to 10% by weight of B2O3; 20 to 40% by weight of ZnO; 5 to 10% by weight of Al2O3; 5 to 10% by weight of MgO; At least one of Na2O, K2O, and CaO is added in a total amount of 5 to 30% by weight; At least one of CuO and Ag2O is added in a total amount of 0.1 to 5% by weight; and 0.1 to 2% by weight of an oxide having a luminescent function; A luminescent antibacterial glass composition. 〔Claim 2〕 The Na2O is added in an amount of 2 to 10% by weight, The K2O is added in an amount of 2 to 15% by weight, The CaO is added in an amount of 1 to 5% by weight. The luminescent antibacterial glass composition according to Claim 1. 〔Claim 3〕 The CuO is added in an amount of 0.1 to 5% by weight, The Ag2O is added in an amount of 0.1 to 2% by weight, and the antibacterial glass composition having a luminescent function according to claim 1. [Claim 4] The oxide having a luminescent function contains at least one of Eu2O3 and Tb4O7, and the antibacterial glass composition having a luminescent function according to claim 1. [Claim 5] The oxide having a luminescent function is Eu2O3, The Eu2O3 is added in an amount of 0.5 to 1.0% by weight, and the antibacterial glass composition having a luminescent function according to claim 1. [Claim 6] A method for producing an antibacterial glass powder having a luminescent function, (a) 20 to 40% by weight of SiO2, 1.5 to 10% by weight of B2O3, 20 to 40% by weight of ZnO, 5 to 10% by weight of Al2O3, 5 to 10% by weight of MgO, At least one of Na2O, K2O, and CaO is combined to be 5 to 30% by weight, At least one of CuO and Ag2O is combined to be 0.1 to 5% by weight, and 0.1 to 2% by weight of an oxide having a luminescent function are mixed and stirred to form an antibacterial glass composition having a luminescent function; (b) Melting the antibacterial glass composition having a luminescent function; (c) Cooling the melted antibacterial glass composition having a luminescent function; and, (d) Crushing the cooled glass to obtain an antibacterial glass powder having a luminescent function; A method for producing an antibacterial glass powder having a luminescent function, comprising the steps of: [Claim 7] In the step (a), The Na2O is added in an amount of 2 to 10% by weight, The K2O is added in an amount of 2 to 15% by weight, The CaO is added in an amount of 1 to 5% by weight, and the method for producing an antibacterial glass powder having a luminescent function according to claim 6. [Claim 8] In the step (a), The CuO is added in an amount of 0.1 to 5% by weight, The Ag2O is added in an amount of 0.1 to 2% by weight. The method for producing the antibacterial glass powder with a luminescent function according to claim 6. 〔Claim 9〕 In the step (a), The oxide with a luminescent function contains at least one of Eu2O3 and Tb4O7. The method for producing the antibacterial glass powder with a luminescent function according to claim 6. 〔Claim 10〕 In the step (a), The oxide with a luminescent function is Eu2O3, The Eu2O3 is added in an amount of 0.5 to 1.0% by weight. The method for producing the antibacterial glass powder with a luminescent function according to claim 6. 〔Claim 11〕 In the step (b), The melting is carried out at 1,000 to 1,300 °C for 30 to 90 minutes. The method for producing the antibacterial glass powder with a luminescent function according to claim 6. 〔Claim 12〕 In the step (d), The antibacterial glass powder with a luminescent function has an average diameter of 5 to 15 μm based on D50. The method for producing the antibacterial glass powder with a luminescent function according to claim 6. 〔Aspect according to the present invention〕 The antibacterial glass composition with a luminescent function according to the present invention and the method for producing the antibacterial glass powder thereof provide a glass composition containing Al2O3, MgO, etc. that act as a host structure in the antibacterial glass composition in order to impart a luminescent function to the antibacterial agent produced from the antibacterial glass composition, and further add Eu2O3, Tb4O7, etc., which are activator substances with a luminescent function, so as to have both an antibacterial function and a luminescent function.

[0014] Thus, the antibacterial glass composition with a luminescent function according to the present invention and the method for producing the antibacterial glass powder thereof attempt to apply the antibacterial glass powder to household electrical appliances to impart an antibacterial function, introduce a luminescent function, and make it possible to visually confirm whether the antibacterial agent is contained in the parts. C, which has the convenience of quality inspection.

[0015] As a result, the method for manufacturing the antibacterial glass composition with a luminescent function and the antibacterial glass powder according to the present invention can endow a luminescent function and immediately confirm by an external light source whether an antibacterial agent is correctly contained in parts of home appliances.

[0016] Therefore, the method for manufacturing the antibacterial glass composition with a luminescent function and the antibacterial glass powder according to the present invention, in addition to the antibacterial function, adds an oxide of a luminescent function, which is an active substance having a luminescent function, in the glass structure to endow a luminescent function. When the antibacterial glass powder is applied to parts of home appliances, consumers and manufacturers can easily identify that the antibacterial agent is contained.

[0017] Therefore, the antibacterial glass composition with a luminescent function according to the embodiment of the present invention contains 20 to 40% by weight of SiO2, 1.5 to 10% by weight of B2O3, 20 to 40% by weight of ZnO, 5 to 10% by weight of Al2O3, 5 to 10% by weight of MgO, 5 to 30% by weight in total of at least one or more of Na2O, K2O, and CaO, 0.1 to 5% by weight in total of at least one or more of CuO and Ag2O, and 0.1 to 2% by weight of an oxide of a luminescent function.

[0018] Here, Na2O is preferably added at 2 to 10% by weight, K2O is preferably added at 2 to 15% by weight, and CaO is preferably added at 1 to 5% by weight.

[0019] Furthermore, CuO is preferably added at 0.1 to 5% by weight, and Ag2O is preferably added at 0.1 to 2% by weight.

[0020] The oxide of the luminescent function contains at least one or more of Eu2O3 and Tb4O7.

[0021] The oxide of the luminescent function is Eu2O3, and Eu2O3 is more preferably added at 0.5 to 1.0% by weight.

Advantages of the Invention

[0022] According to the present invention, in order to impart a luminescent function to an antibacterial agent made of an antibacterial glass composition, a glass composition containing Al2O3, MgO, etc., which acts as a host structure in the antibacterial glass composition, is provided, and Eu2O3, Tb4O7, etc., which are activator substances for the luminescent function, are further added to have both an antibacterial function and a luminescent function.

[0023] Also, according to the present invention, antibacterial glass powder is applied to household electrical appliances to impart an antibacterial function, a luminescent function is introduced, so that it is possible to visually confirm whether the antibacterial agent is contained in the parts, and convenience for quality inspection is also provided.

[0024] Also, according to the present invention, a luminescent function is imparted to the antibacterial glass composition, and it is possible to immediately confirm by an external light source whether an antibacterial agent is correctly contained in the parts of a household electrical appliance.

[0025] Therefore, according to the present invention, in addition to the antibacterial function, an oxide having a luminescent function, which is an activator substance having a luminescent function in the glass structure, is added to provide a luminescent function, so that when the antibacterial glass powder is applied to the parts of a household electrical appliance, it becomes easier for consumers and manufacturers to identify that the antibacterial agent is contained.

[0026] Also, according to the present invention, after designing and manufacturing a new composition containing a luminescent function factor in the antibacterial glass powder as an antibacterial agent and then adding the antibacterial agent to the parts of a household electrical appliance, a function is provided that can easily confirm whether the antibacterial agent is correctly contained in the parts of the household electrical appliance.

[0027] As a result, the present invention can enhance the reliability of the product because it can be used for the import inspection of antibacterial parts by manufacturers and visually show consumers that the sanitary function product contains an antibacterial agent.

[0028] Also, the present invention can enhance the hygiene of the product with the antibacterial agent, can immediately detect the factor of the sanitary function, and can upgrade the function of the antibacterial agent.

[0029] The above-described effects and the specific effects of the present invention will be described and described while explaining the embodiments for carrying out the following invention.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying out the Invention

[0031] The above-mentioned objects, features and advantages will be described in detail below with reference to the accompanying drawings, whereby those of ordinary skill in the technical field to which the present invention pertains can easily implement the technical idea of the present invention. In explaining the present invention, when it is determined that a specific description of the known technology related to the present invention obscures the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0032] As used herein, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "composed of" or "including" (including; constituting; constructing; setting; inclusion; inclusion; containing) in this application are not to be construed as necessarily including all of the plurality of components or plurality of steps described in the specification, and some of the components or some of the steps may not be included, or may further include additional components or steps.

[0033] Hereinafter, a method for producing a luminescent antibacterial glass composition and its antibacterial glass powder according to some embodiments of the present invention will be described.

[0034] In recent years, bacteria and molds have been generated and propagated due to contact with moisture and food, causing hygiene problems. Since COVID-19, consumers' requirements for hygiene have been strengthening, and its importance has been increasing.

[0035] In order to impart antibacterial properties to household appliances, although antibacterial glass powder, which is a trace amount of antibacterial agent, has been introduced into plastic parts to impart antibacterial functions, it is difficult to visually confirm immediately whether the antibacterial agent has been correctly added to the plastic parts, and from the manufacturer's perspective, it has been difficult to conduct quality inspections regarding whether the antibacterial agent has been correctly added to the parts.

[0036] Therefore, the luminescent antibacterial glass composition according to the embodiments of the present invention provides a glass composition containing Al2O3, MgO, etc., which act as a host structure in the glass composition with antibacterial function, in order to impart a luminescent function to the antibacterial agent produced from the glass composition with antibacterial function, and further adds Eu2O3, Tb4O7, etc., which are activator substances with luminescent functions, so as to have both antibacterial and luminescent functions.

[0037] Thus, in the present invention, an antibacterial glass powder is applied to household appliances to attempt to impart an antibacterial function, introduce a luminescent function, make it possible to visually confirm whether the antibacterial agent is contained in the parts, and also provide convenience for quality inspection.

[0038] As a result, the antibacterial glass composition with a light-emitting function according to an embodiment of the present invention can impart a light-emitting function and immediately confirm by an external light source whether an antibacterial agent is correctly contained in parts of home appliances.

[0039] Therefore, the antibacterial glass composition with a light-emitting function according to an embodiment of the present invention, in addition to an antibacterial function, adds an oxide of a light-emitting function, which is an active substance having a light-emitting function, in a glass structure to provide a light-emitting function, so that when antibacterial glass powder is applied to parts of home appliances, consumers and manufacturers can easily identify that an antibacterial agent is contained.

[0040] Generally, methods for confirming whether an antibacterial agent is actually contained in products and parts formulated with an antibacterial agent are limited and relatively costly and time-consuming. For example, plastic is burned to leave only the antibacterial agent, and confirmation is performed using weight measurement, X-ray CT, etc.

[0041] In contrast, the present invention designs and manufactures a new composition containing a light-emitting function factor in antibacterial glass powder, which is an antibacterial agent, and then adds the antibacterial agent to parts of home appliances, thereby providing a function of easily confirming whether the antibacterial agent is correctly contained in parts of home appliances.

[0042] As a result, the present invention can enhance the reliability of products because it can visually show that an antibacterial agent is contained in the imported inspection of antibacterial parts by manufacturers and in products with a hygienic function for consumers.

[0043] In addition, the present invention can enhance the hygiene of products with an antibacterial agent, immediately detect factors of the hygienic function, and upgrade the function of the antibacterial agent.

[0044] Therefore, the antibacterial glass composition with a light-emitting function according to an embodiment of the present invention contains 20 to 40 wt% of SiO2, 1.5 to 10 wt% of B2O3, 20 to 40 wt% of ZnO, 5 to 10 wt% of Al2O3, 5 to 10 wt% of MgO, 5 to 30 wt% in total of at least one or more of Na2O, K2O, and CaO, 0.1 to 5 wt% in total of at least one or more of CuO and Ag2O, and 0.1 to 2 wt% of an oxide with a light-emitting function.

[0045] Here, it is preferable that Na2O is added at 2 to 10 wt%, K2O is added at 2 to 15 wt%, and CaO is added at 1 to 5 wt%.

[0046] Furthermore, it is preferable that CuO is added at 0.1 to 5 wt% and Ag2O is added at 0.1 to 2 wt%.

[0047] The oxide with a light-emitting function contains at least one or more of Eu2O3 and Tb4O7.

[0048] The oxide with a light-emitting function is Eu2O3, and it is more preferable that Eu2O3 is added at 0.5 to 1.0 wt%.

[0049] Hereinafter, the functions of each component of the antibacterial glass composition with a light-emitting function according to an embodiment of the present invention and their contents will be described in detail.

[0050] SiO2 is a glass-forming agent that enables vitrification and serves as a core component that acts as a framework from a structural aspect of the glass. If these SiO2 contain more than an appropriate amount, the viscosity will increase during glass melting, and the workability and yield will decrease during the cooling process.

[0051] Therefore, SiO2 is preferably added at a content ratio of 20 to 40% by weight of the total weight of the luminescent antibacterial glass composition according to the present invention. In a more preferable range, it can exhibit 28 to 34% by weight. When the addition amount of SiO2 is less than 20% by weight, crystallization may occur during glass melting, and stable glass may not be formed. Conversely, when the addition amount of SiO2 exceeds 40% by weight, although it is advantageous for vitrification, the melting temperature increases, the glass transition temperature (Tg) increases, and during the formation process of the coating film using glass powder, in order to ensure a transparent glass film, the plastic temperature increases, and it may be difficult to apply to the heat strengthening process temperature.

[0052] B2O3 is a typical network-forming oxide and is a core component that enables sufficient vitrification together with SiO2. B2O3 has a low melting point and is used for applications that lower the eutectic point of the melt. In addition, B2O3 acts to increase the solubility of hard components (such as Al2O3 and CuO) during melting for vitrification, thereby assisting in forming a homogeneous glass. However, when B2O3 is added above a certain level, problems may occur such as weakening the glass bonding structure and reducing water resistance.

[0053] Therefore, B2O3 is preferably used in a very small amount only for applications that lower the melting point in order to realize a water-insoluble antibacterial glass.

[0054] For this reason, B2O3 is preferably added at a content ratio of 1.5 to 10% by weight of the total weight of the luminescent antibacterial glass composition according to the present invention. When the addition amount of B2O3 is less than 1.5% by weight, since the flux is insufficient, it deviates from the vitrification region, and an unmelted phenomenon may occur. Conversely, when the addition amount of B2O3 exceeds 10% by weight, a phenomenon of reduced water resistance may occur due to the structural problem of B in the network-forming structure and the nature of the element itself.

[0055] ZnO serves as an antibacterial active substance and also acts as a component that lowers the vitrification temperature in glass formation.

[0056] These ZnO are intermediate oxides. In order to participate in the network-forming structure in glass, they must have a small atomic radius, a large electronegativity, and a small difference from oxygen. These intermediate oxides have a larger atomic radius and a lower electronegativity than the normal network-forming oxides Si, P, and B, and it is difficult to form glass alone. However, in the presence of network-forming oxides, they are substituted for the network-forming oxides and act as components that perform their functions. These ZnO act only as modifying oxides when their content is below a certain level, but when their content is above a certain level, they form covalent bonds and the durability improves rapidly. Here, the certain level is determined by the content of the network-forming oxides and the modifying oxides.

[0057] Therefore, ZnO is preferably added at a content ratio of 20 to 40% by weight of the total weight of the luminescent functional antibacterial glass composition according to the present invention. In a more preferable range, it can exhibit 30 to 35% by weight. When the addition amount of ZnO is less than 20% by weight, there is a problem that the absolute amount of the substance that exhibits antibacterial performance is insufficient, so sufficient antibacterial power cannot be exhibited. Conversely, when the addition amount of ZnO exceeds 40% by weight and is excessively added, the ZnO content is too high, the vitrification formation region becomes narrow, and it is difficult to manufacture stable glass.

[0058] Al2O3 not only forms a vitrification structure but also acts as a host structure to obtain the luminescence effect of an activator. That is, Al2O3 is a substance that acts as a host for the phosphor and is also useful for the formation of vitrification. Thus, Al2O3 plays a main role for the transparent glass composition to perform the luminescence function.

[0059] Therefore, Al2O3 is preferably added at a content ratio of 5 to 10% by weight of the total weight of the luminescent antibacterial glass composition according to the present invention. In a more preferable range, 6 to 8% by weight can be presented. When the addition amount of Al2O3 is less than 5% by weight, there is a possibility that it may not be able to perform its function as a host structure correctly. Conversely, when the addition amount of Al2O3 exceeds 10% by weight and is added in a large amount, it deviates from the vitrification region, and devitrification or immiscibility may occur during the cooling process.

[0060] MgO, together with Al2O3, functions as a host of the phosphor function to obtain the luminescence effect of the activator.

[0061] MgO is preferably added at a content ratio of 5 to 10% by weight of the total weight of the luminescent antibacterial glass composition according to the present invention. In a more preferable range, 5 to 6% by weight can be presented. When the addition amount of MgO is less than 5% by weight, there is a possibility that it may not be able to perform its function as a host structure correctly. Conversely, when the addition amount of MgO exceeds 10% by weight and is added in an excessive amount, it is difficult to vitrify and a high melting temperature is required, which is not preferable.

[0062] Alkali oxides such as Na2O, K2O, and CaO act as network modifiers that non-bridgingly bond within the glass composition and are oxides that lower the vitrification temperature. Although these components alone cannot be vitrified, when mixed with network formers such as SiO2 and B2O3 in a certain ratio, vitrification becomes possible. If only one of the SiO2 and B2O3 components is included in the glass composition, within the vitrification possible region, the durability of the glass can be weakened. However, when two or more of the SiO2 and B2O3 components are included in the glass composition, the durability of the glass may be further improved depending on the ratio. This is called the mixed alkali effect.

[0063] Therefore, alkali oxides such as Na2O, K2O, and CaO utilize the fact that they occupy the modified oxide sites in the glass first, and thus improve the antibacterial power. Furthermore, alkali oxides such as Na2O, K2O, and CaO contribute to the formation of the network with ZnO as the intermediate oxide, strengthen the durability, and also contribute to the expression of antibacterial power due to the water-insoluble property and surface charge.

[0064] At least one of Na2O, K2O, and CaO is preferably added in a combined content ratio of 5 to 30% by weight of the total weight of the luminescent functional antibacterial glass composition according to the present invention. When at least one of Na2O, K2O, and CaO is added in a combined amount of less than 5% by weight, since the flux is insufficient, a phenomenon of forming unmelted matter may occur due to deviating from the vitrification region. Conversely, when at least one of Na2O, K2O, and CaO is added in a large amount exceeding 30% by weight in total, it may cause crystallization, which is not preferable.

[0065] Here, Na2O3 is more preferably added at 2 to 10% by weight, K2O is added at 2 to 15% by weight, and CaO is added at 1 to 5% by weight.

[0066] CuO and Ag2O are antibacterial active factors that can maximize the antibacterial power.

[0067] At least one of CuO and Ag2O is preferably added in a combined content ratio of 0.1 to 5% by weight of the total weight of the luminescent functional antibacterial glass composition according to the present invention. When at least one of CuO and Ag2O is added in a combined amount of less than 0.1% by weight, there is a possibility that the expression of antibacterial properties may not be properly carried out. Conversely, when at least one of CuO and Ag2O is added in an excessive amount exceeding 5% by weight in total, there is a possibility of crystallization and blackening of the glass hue, which is not preferable.

[0068] Here, it is more preferable that CuO is added in an amount of 0.1 to 5% by weight, and Ag2O is added in an amount of 0.1 to 2% by weight.

[0069] The oxide with a light-emitting function comes to act as an activator, is doped into the composition of the vitrified host, and mainly functions to release energy and emit light. Therefore, in the present invention, it can be said that the oxide with a light-emitting function is an essential component added for the light-emitting function.

[0070] The oxide with a light-emitting function contains at least one or more of Eu2O3 and Tb4O7. Among these, it is more preferable to use Eu2O3 as the oxide with a light-emitting function.

[0071] The oxide with a light-emitting function is preferably added at a content ratio of 0.1 to 2% by weight based on the total weight of the antibacterial glass composition with a light-emitting function according to the present invention. In a more preferable range, it can exhibit 0.5 to 1.0% by weight. If the addition amount of the oxide with a light-emitting function is less than 0.1% by weight, there is a possibility that the light-emitting function cannot be correctly realized. Conversely, if the addition amount of the oxide with a light-emitting function exceeds 2% by weight and is added in a large amount, it may cause crystallization, which is not preferable.

[0072] Hereinafter, with reference to the accompanying drawings, a method for manufacturing an antibacterial glass powder with a light-emitting function according to an embodiment of the present invention will be described.

[0073] FIG. 1 is a process flowchart showing a method for manufacturing an antibacterial glass powder with a light-emitting function according to an embodiment of the present invention.

[0074] As shown in FIG. 1, the method for manufacturing an antibacterial glass powder with a light-emitting function according to an embodiment of the present invention includes a mixing step (S110), a melting step (S120), a cooling step (S130), and a pulverizing step (S140).

[0075] Mixing In the mixing stage (S110), 20 to 40 wt% of SiO2, 1.5 to 10 wt% of B2O3, 20 to 40 wt% of ZnO, 5 to 10 wt% of Al2O3, 5 to 10 wt% of MgO, at least one or more of Na2O3, K2O and CaO are combined to be 5 to 30 wt%, at least one or more of CuO and Ag2O are combined to be 0.1 to 5 wt%, and 0.1 to 2 wt% of an oxide with a luminescent function are mixed and stirred to form a luminescent functional antibacterial glass composition.

[0076] Here, it is preferable that Na2O is added at 2 to 10 wt%, K2O is added at 2 to 15 wt%, and CaO is added at 1 to 5 wt%.

[0077] Furthermore, it is preferable that CuO is added at 0.1 to 5 wt% and Ag2O is added at 0.1 to 2 wt%.

[0078] The oxide with a luminescent function contains at least one or more of Eu2O3 and Tb4O7.

[0079] The oxide with a luminescent function is Eu2O3, and it is more preferable that Eu2O3 is added at 0.5 to 1.0 wt%.

[0080] Melting In the melting stage (S120), the luminescent functional antibacterial glass composition is melted.

[0081] In this stage, it is preferable that the melting is carried out at 1,000 to 1,300 °C for 30 to 90 minutes. If the melting temperature is less than 1,000 °C or the melting time is less than 30 minutes, there is a problem that the antibacterial glass composition cannot be completely melted and immiscibility of the glass melt occurs. Conversely, if the melting temperature exceeds 1,300 °C or the melting time exceeds 90 minutes, excessive energy and time are required, which is not economical.

[0082] Cooling In the cooling stage (S130), the melted luminescent functional antibacterial glass composition is cooled to room temperature.

[0083] At this stage, cooling is preferably performed by the method of cooling in furnace. When applying air cooling or water cooling, since the internal stress of the antibacterial glass is formed too much and cracks may occur in some cases, cooling by cooling in furnace is preferred.

[0084] Grinding In the grinding stage (S140), the cooled glass is ground to obtain antibacterial glass powder with a light-emitting function. At this time, any one selected from the commonly known ball mills, jet mills, and planetary mills can be applied for grinding.

[0085] By these grindings, the glass is finely ground to produce antibacterial glass powder with a light-emitting function. These antibacterial glass powders with a light-emitting function preferably have an average diameter of 5 to 15 μm based on D50.

[0086] By the above process (S110 to S140), antibacterial glass powder with a light-emitting function according to an embodiment of the present invention can be manufactured.

[0087] The antibacterial glass powder with a light-emitting function manufactured by the method according to the embodiment of the present invention described above provides a glass composition containing Al2O3, MgO, etc. that act as a host structure in the glass composition with antibacterial function in order to impart a light-emitting function to the antibacterial agent manufactured with the glass composition with antibacterial function, and further adds Eu2O3, Tb4O7, etc., which are activator substances with a light-emitting function, to have both antibacterial function and light-emitting function.

[0088] As a result, when the antibacterial glass powder with a light-emitting function manufactured by the method according to the embodiment of the present invention is applied to parts of home appliances to impart an antibacterial function and introduce a light-emitting function, it becomes possible to visually confirm whether an antibacterial agent is contained in the parts of home appliances, and also the convenience of quality inspection can be provided.

[0089] Furthermore, the antibacterial glass powder with a light-emitting function manufactured by the method according to the embodiment of the present invention can be immediately confirmed by an external light source whether an antibacterial agent is correctly contained in the parts of household electrical appliances by imparting a light-emitting function.

[0090] Thus, the antibacterial glass powder with a light-emitting function manufactured by the method according to the embodiment of the present invention, in addition to the antibacterial function, adds an oxide with a light-emitting function, which is an active substance having a light-emitting function in the glass structure, to have a light-emitting function. When the antibacterial glass powder is applied to the parts of household electrical appliances, consumers and manufacturers can easily identify that the antibacterial agent is contained.

[0091] 〔Embodiment〕 Example Hereinafter, the configuration and operation of the present invention will be described in more detail by preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and should not be construed as limiting the present invention in any way.

[0092] Contents not described herein can be technically analogized sufficiently by those skilled in the art, so the description thereof will be omitted.

[0093] 1. Manufacture of antibacterial glass powder sample Table 1 shows the composition and its composition ratio for the antibacterial glass compositions according to Examples 1 to 2 and Comparative Example 1. At this time, the antibacterial glass compositions having the compositions described in Examples 1 to 2 and Comparative Example 1 were each melted in an electric furnace at a temperature of 1,200 °C, and then cooled in a glass bulk form by an air-cooling method on a stainless steel plate. Thereafter, the antibacterial glass manufactured according to Examples 1 to 2 and Comparative Example 1 was pulverized by a ball mill and then passed through a 400-mesh sieve to manufacture an antibacterial glass powder sample.

[0094] Here, as raw materials for the components Na2O, K2O, and CaO, Na2CO3, K2CO3, and CaCO3 were used respectively, and other components were the same as those described in Table 1.

[0095]

Table 1

[0096] 2. Physical Property Evaluation Table 2 shows the results of physical property evaluation for the antibacterial glass powder samples produced according to Examples 1 to 2 and Comparative Example 1. Also, Fig. 2 is an actual measurement photo showing the state before irradiating the antibacterial glass powder produced according to Example 1 and Comparative Example 1 with a UV lamp, and Fig. 3 is an actual measurement photo showing the state after irradiating the antibacterial glass powder produced according to Example 1 and Comparative Example 1 with a UV lamp. Further, Figs. 4 and 5 are photos showing the antibacterial activity test results of the antibacterial glass powder produced according to Examples 1 and 2. At this time, Fig. 4 is a photo showing the antibacterial activity test result against Staphylococcus aureus, and Fig. 5 is a photo showing the antibacterial activity test result against Escherichia coli.

[0097] Glassification was classified based on the cases where the glass properties were shown homogeneously and the phenomena of opacification and unmolten matter generation. Furthermore, in order to confirm the antibacterial degree of each antibacterial glass powder, the antibacterial activity values against Staphylococcus aureus and Escherichia coli were measured by the ASTM E2149-13a, flask shaking method.

[0098]

Table 2

[0099] As shown in Tables 1 to 2 and Figs. 2 to 5, in Examples 1 and 2, Eu2O3 was added at 0.5 wt% and 1 wt% respectively, and in Comparative Example 1, Eu2O3 was not added.

[0100] At this time, it was confirmed that the antibacterial activity (against Staphylococcus aureus and Escherichia coli) of the antibacterial glass powder in Comparative Example 1 was 99.9%, and the antibacterial activity (against Staphylococcus aureus and Escherichia coli) of the antibacterial glass powder in Examples 1 and 2 also maintained 99.9% respectively.

[0101] On the one hand, it can be confirmed that the antibacterial glass powder produced according to Example 1 and Comparative Example 1 has a transparent hue before irradiation with a UV lamp.

[0102] At this time, it can be confirmed that the antibacterial glass powder produced according to Example 1 emits red light and shows red after irradiation with a UV lamp. On the other hand, no luminescence phenomenon has been observed in the antibacterial glass powder produced according to Comparative Example 1 after irradiation with a UV lamp.

[0103] Also, in the case of Example 1 where Eu2O3 was added for the luminescence function, it was confirmed that the physical properties and form of the existing glass remained unchanged and only the luminescence function was added.

[0104] As can be seen from the results of the above experiments, the antibacterial agent is added to plastics, fibers, etc. at 0.5 wt and 1 wt% to impart an antibacterial function to the product and provide the hygiene of the product to consumers. A small amount of white antibacterial agent is difficult to distinguish whether it is added in parts or products.

[0105] Therefore, by imparting a luminescence function to the antibacterial agent and irradiating it with high-energy light using a UV lamp, the luminescence of the antibacterial agent present inside the antibacterial plastic can be confirmed, and it becomes easier to confirm that the antibacterial agent is contained in the parts.

[0106] As described above, the present invention has been described with reference to the exemplary drawings. However, the present invention is not limited by the embodiments and drawings disclosed herein, and it is obvious that various modifications can be made by those of ordinary skill in the art within the scope of the technical idea of the present invention. Furthermore, even if the effects of the present invention due to the configuration are not explicitly described in the above-described embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

Claims

1. An antibacterial glass composition having a light-emitting function, comprising: SiO ２ at 20 to 40% by weight; B ２ O ３ is 1.5 to 10% by weight; 20 to 40% by weight of ZnO; Al ２ O ３ is 5 to 10% by weight; 5 to 10% by weight of MgO; Na ２ O, K ２ At least one or more of O and CaO are combined to be 5 to 30% by weight; CuO and Ag ２ at least one or more of O is combined to be 0.1 to 5% by weight; and, 0.1 to 2% by weight of an oxide having a light-emitting function; an antibacterial glass composition having a light-emitting function.

2. The Na ２ O is added in an amount of 2 to 10% by weight, The above-mentioned K ２ O is added in an amount of 2 to 15% by weight, The antibacterial glass composition having a light-emitting function according to Claim 1, wherein the CaO is added in an amount of 1 to 5% by weight.

3. The CuO is added in an amount of 0.1 to 5% by weight, The above-mentioned Ag ２ O is added in an amount of 0.1 to 2% by weight, and the antibacterial glass composition having a light-emitting function according to claim 1.

4. The oxide with the light-emitting function is Eu ２ O ３ and Tb ４ O ７ The antibacterial glass composition with the light-emitting function according to claim 1, which contains at least one or more of them.

5. The oxide with the light-emitting function is Eu ２ O ３ and The Eu ２ O ３ is added in an amount of 0.5 to 1.0% by weight, and the antibacterial glass composition having a light-emitting function according to claim 1.

6. A method for producing an antibacterial glass powder having a light-emitting function, comprising: (a) SiO ２ at 20 to 40% by weight, B ２ O 3 in an amount of 1.5 to 10% by weight, mixing 20 to 40% by weight of ZnO, Al ２ O 3 at 5 to 10% by weight, 5 to 10% by weight of MgO, Na ２ O, K ２ At least one or more of O and CaO are combined to be 5 to 30% by weight, CuO and Ag ２ at least one of O is combined to be 0.1 to 5% by weight, and 0.1 to 2% by weight of an oxide having a light-emitting function, and stirring to form an antibacterial glass composition having a light-emitting function; (b) melting the antibacterial glass composition having a light-emitting function; (c) cooling the melted antibacterial glass composition having a light-emitting function; and (d) pulverizing the cooled glass to obtain an antibacterial glass powder having a light-emitting function. A method for producing an antibacterial glass powder having a light-emitting function.

7. In the step (a), The Na ２ O is added in an amount of 2 to 10% by weight, The above-mentioned K ２ O is added in an amount of 2 to 15% by weight, The method for producing an antibacterial glass powder having a light-emitting function according to Claim 6, wherein the CaO is added in an amount of 1 to 5% by weight.

8. In the step (a), The CuO is added in an amount of 0.1 to 5% by weight, The above-mentioned Ag ２ O is added in an amount of 0.1 to 2% by weight. The method for producing the antibacterial glass powder with a light-emitting function according to claim 6.

9. In the step (a), The oxide with the light-emitting function is Eu ２ O ３ and Tb ４ O ７ The method for producing the antibacterial glass powder with the light-emitting function according to claim 6, which contains at least one or more of them.

10. In the step (a), The oxide with the light-emitting function is Eu ２ O ３ and is The Eu ２ O ３ is added in an amount of 0.5 to 1.0% by weight. The method for producing the antibacterial glass powder having a light-emitting function according to claim 6.

11. In the step (b), The melting is carried out at 1,000 to 1,300 °C for 30 to 90 minutes. The method for producing an antibacterial glass powder having a light-emitting function according to Claim 6.

12. In the step (d), The antibacterial glass powder having a light-emitting function has an average diameter of 5 to 15 μm based on D50. The method for producing an antibacterial glass powder having a light-emitting function according to Claim 6.

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