KR-20260066860-A - ANTIBACTERIAL ORGANIC-INORGANIC COMPOSITES AND METHOD FOR PREPARING THE SAME

Abstract

The present invention relates to an antimicrobial organic-inorganic composite and a method for manufacturing the same. An antimicrobial organic-inorganic composite according to one aspect of the present invention is an organic-inorganic composite in which an organic material is inserted into a layered titanate, wherein the layered titanate has photocatalytic properties and the organic material has hydrophobic properties.

Inventors

• 양수철
• 김태홍
• 심종효
• 정의현
• 성정현
• 천민영
• 이채은

Assignees

• 동아대학교 산학협력단

Dates

Publication Date

20260512

Application Date

20241105

Claims (8)

1. As an organic-inorganic composite in which an organic material is inserted into a layered titanate, The above layered titanate has photocatalytic properties, and The above organic material has hydrophobic properties. Phosphorus antimicrobial organic-inorganic complex.
2. In paragraph 1, The above layered titanate is Manufactured by mixing titanium dioxide, potassium carbonate, and an inorganic material containing ions with photocatalytic properties and heat-treating the mixture, wherein each layer contains ions with photocatalytic properties and potassium is located between the layers. Phosphorus antimicrobial organic-inorganic complex.
3. In paragraph 1, The above hydrophobic organic material The layered titanate is protonated and placed in a solution containing hydrophobic organic matter, and then sonicated to be inserted between the layers. Phosphorus antimicrobial organic-inorganic complex.
4. In paragraph 3, The molecular ratio of the proton contained in the protonated layered titanate to the hydrophobic organic contained in the solution containing the hydrophobic organic is 1:40 to 1:160. Phosphorus antimicrobial organic-inorganic complex.
5. A step of preparing a layered titanate having photocatalytic properties; The step of protonating the above layered titanate; and A method for preparing an antimicrobial organic-inorganic composite comprising the step of inserting a hydrophobic organic material into a protonated layered titanate.
6. In paragraph 5, The step of preparing the above-mentioned layered titanate is Preparing a layered titanate in which each layer contains ions with photocatalytic properties and potassium is located between the layers by mixing titanium dioxide, potassium carbonate, and an inorganic material containing ions with photocatalytic properties and heat-treating the mixture. Method for manufacturing an antimicrobial organic-inorganic composite.
7. In paragraph 5, The step of inserting the above hydrophobic organic material Inserting hydrophobic organic material between the layers of protonated layered titanate by placing the protonated layered titanate in a solution containing hydrophobic organic material and ultrasonically treating it. Method for manufacturing an antimicrobial organic-inorganic composite.
8. In Paragraph 7, The molecular ratio of the proton contained in the above-mentioned protonated layered titanate to the hydrophobic organic contained in the solution containing the above-mentioned hydrophobic organic is 1:40 to 1:160. Method for manufacturing an antimicrobial organic-inorganic composite.

Description

Antibacterial Organic-Inorganic Composites and Method for Preparing the Same The present invention relates to a composite that provides an antibacterial function. Various prior art technologies providing antibacterial functions through inorganic materials with photocatalytic properties are being disclosed. These existing technologies have limitations in that they primarily disclose antibacterial functions centered on the ability to eliminate bacteria, but do not consider methods to inhibit bacterial growth. Specifically, methods to improve antimicrobial properties include eliminating bacteria and preventing bacterial growth, but existing antimicrobial technologies have the problem of focusing mainly on photocatalytic properties that eliminate bacteria. Some existing technologies that mention hydrophobicity only disclose that the antimicrobial material and the hydrophobic material are provided as separate layers through a photocatalyst, and do not consider utilizing both photocatalytic properties and hydrophobicity to provide antimicrobial function. In this regard, a technology is being disclosed that provides both photocatalytic properties and hydrophobicity by coating a hydrophobic material onto the surface of an inorganic material possessing photocatalytic properties. However, this existing technology has a problem in that the active area exhibiting photocatalytic properties is reduced as hydrophobic organic materials are combined with inorganic materials possessing photocatalytic properties. In other words, existing organic-inorganic composites designed to simultaneously provide photocatalytic properties and hydrophobicity suffer from a trade-off problem in which photocatalytic properties are degraded as hydrophobicity is secured. Figure 1 is a flowchart of a method for manufacturing an antimicrobial organic-inorganic composite according to the present invention. FIG. 2 is a conceptual diagram showing an antimicrobial organic-inorganic composite manufactured according to the present invention. Figure 3 is an SEM image of a protonated layered titanate according to Example 1. Figure 4 is an SEM image of an antimicrobial organic-inorganic composite prepared according to Comparative Example 1. Figure 5 is an SEM image of an antimicrobial organic-inorganic composite prepared according to Comparative Example 2. Figure 6 is an SEM image of an antimicrobial organic-inorganic composite prepared according to Comparative Example 3. Figure 7 is an SEM image of an antimicrobial organic-inorganic composite prepared according to Example 1. Figure 8 is an SEM image of an antimicrobial organic-inorganic composite prepared according to Example 2. Figure 9 is an SEM image of an antimicrobial organic-inorganic composite prepared according to Example 3. Figure 10 is a graph showing the XRD analysis results of layered titanate prepared according to Example 1 and protonated layered titanate. Figure 11 is a graph showing the XRD analysis results of each antimicrobial organic-inorganic composite prepared according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3. FIG. 12 is a graph showing the absorbance measured by mixing the protonated layered titanate according to Example 1 and each antimicrobial organic-inorganic composite prepared according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3 with methylene blue. Figure 13 is a graph showing the methylene blue removal efficiency of the protonated layered titanate according to Example 1 and each antimicrobial organic-inorganic composite prepared according to Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 1, Example 2, and Example 3. The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the claims. Meanwhile, the terms used in this specification are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. The present invention relates to an organic-inorganic composite that provides an antibacterial function. In particular, the present invention is characterized by the technical feature of maximizing the antibacterial effect by securing hydrophobicity while simultaneously enhancing photocatalytic properties. These technical features can be achieved by preparing a layered titanate in which each