CN-116272132-B - Antibacterial filter screen and preparation method and application thereof

Abstract

The invention discloses a bacteriostatic filter screen and a preparation method and application thereof, and relates to the field of air purification. According to the antibacterial filter screen disclosed by the invention, glass fibers are used as a base material, nano copper-carbon composite is loaded through hydroxylation pretreatment and hydrothermal reaction, and the prepared antibacterial filter screen has excellent bacterial capturing rate and antibacterial performance. The glass fiber adopted by the invention has larger pore diameter, so that the antibacterial filter screen can capture bacteria without increasing air resistance and reducing pressure drop, namely the antibacterial filter screen is not easy to block, the oxygen-enriched nano carbon in the nano copper-carbon compound can improve the surface roughness of the glass fiber, the improved roughness and active groups on the surface of the oxygen-enriched nano carbon cooperate to greatly improve the capture rate of the antibacterial filter screen to bacteria, and the nano copper in the nano copper-carbon compound can provide excellent antibacterial performance.

Inventors

• AN TAICHENG
• LIU QINGLI
• ZHANG WEIPING
• LI GUIYING
• LIANG ZHISHU
• WANG BAOQIANG

Assignees

• 广东工业大学

Dates

Publication Date

20260505

Application Date

20230320

Claims (4)

1. 1. The preparation method of the antibacterial filter screen is characterized by comprising the following steps of: S1, soaking glass fibers with an alkaline solution to obtain hydroxylated glass fibers; s2, dissolving copper salt and a carbon source in an alcohol water solution to form a uniform solution; s3, placing the hydroxylated glass fiber obtained in the S1 into the solution obtained in the S2, and reacting for 3-15 hours at the temperature of 120-200 ℃ to obtain the antibacterial filter screen after the reaction is completed; Wherein the concentration of the alkaline solution in the step S1 is 0.1-5 mol/L The soaking time of the alkaline solution in the step S1 is 1-15 h; The average pore diameter of the glass fiber adopted in the step S1 is 60-80 mu m; the carbon source in the step S2 is reducing sugar; The concentration of the carbon source in the solution obtained in the step S2 is 0.1-1 mol/L; The concentration of copper salt in the solution obtained in the step S2 is 0.05-5 mmol/L; in the alcohol-water solution in the step S2, alcohol is ethanol, and the volume ratio of the alcohol to the total solution is 1-20%.
2. 2. The bacteriostatic filter screen according to claim 1, wherein the concentration of copper salt in the solution obtained in step S2 is 0.1-1 mmol/L.
3. 3. The bacteriostatic filter screen according to claim 1, wherein in the step S3, before the hydroxylated glass fiber obtained in the step S1 is placed in the solution obtained in the step S2, the alkaline solution is required to soak the glass fiber to a pH of 7 to 9.
4. 4. Use of the bacteriostatic filter screen according to any one of claims 1-3 in air purification.

Description

Antibacterial filter screen and preparation method and application thereof Technical Field The invention relates to the field of air purification, in particular to a bacteriostatic filter screen and a preparation method and application thereof. Background Bioaerosols include pollen, viruses, bacteria, fungi or fungal spores, microorganisms with aerodynamic diameters of 20nm to 100mm, in particular where pathogenic microorganisms are more problematic in various indoor environments in underventilated enclosed spaces such as offices and homes, production plants with a high bacterial content, hospitals, etc., which can easily cause direct or indirect harm to human health. In order to capture and kill pathogenic microorganisms in the biological aerosol of the indoor environment, the air purifier is widely used air freshening equipment, and is mainly used for adjusting indoor air quality and protecting people from air pollutants such as particulate matters, biological aerosol, volatile Organic Compounds (VOCs) and the like. While the conventional air purifying device mainly relies on the nanofiber filtering device inside the air purifying device to adsorb and remove pollutants, the conventional nanofibers have higher bacteria capturing rate, and meanwhile, the conventional nanofiber cannot completely kill harmful microorganisms trapped on the surface of the nanofiber, especially for bacteria, fungi, viruses and other pathogens, and along with the prolonging of the service time of the purifier, microorganisms can accumulate and proliferate on the fiber adsorption filter under favorable humidity and temperature conditions, so that the fiber adsorption filter becomes a secondary biological pollution source. In addition, the accumulation of contaminants may also increase the pressure drop across the filter, reducing the life of the filter. The prior art discloses a bacteriostatic yellow lotus-nano zinc oxide superfine glass fiber air filtering material, which is formed by mixing and melt-blowing four substances of yellow lotus extract, nano zinc oxide powder and xanthan gum with glass fibers, wherein particles of the yellow lotus powder and the zinc oxide nano particles can be attached and solidified on the surface of the molten glass fibers, the cross section area of a filtering path of the glass fiber filtering material cannot be reduced, and the problem that a common filter screen in the existing air filtering material is easy to block is solved. Disclosure of Invention In order to solve the problem that the existing antibacterial filter screen is easy to cause bacterial blockage while the bacterial capturing rate is improved, the invention provides a preparation method of the antibacterial filter screen, and nano copper-carbon composite is loaded on glass fibers through high-temperature activation. The antibacterial filter screen provided by the invention has excellent capturing capability on bacteria in air based on the oxygen-enriched nano carbon in the nano copper-carbon compound, and meanwhile, the oxygen-enriched nano carbon is favorable for loading copper to form the nano copper-carbon compound, and based on the sterilization performance of nano copper, the antibacterial filter screen can timely inactivate the captured bacteria, so that the filter screen is not easy to be blocked by the bacteria. Another object of the present invention is to provide a bacteriostatic filter screen. It is still another object of the present invention to provide an application of the bacteriostatic filter screen in air purification. In order to achieve the above purpose, the present invention adopts the following technical scheme: the preparation method of the antibacterial filter screen specifically comprises the following steps: s1, soaking glass fibers with an alkaline solution to obtain hydroxylated glass fibers; S2, dissolving copper salt and a carbon source in an alcohol water solution to form a uniform solution; S3, placing the hydroxylated glass fiber obtained in the S1 into the solution obtained in the S2, and reacting at the temperature of more than 110 ℃ to obtain the antibacterial filter screen after the reaction is completed; the carbon source in the step S2 is reducing sugar; the concentration of the carbon source in the solution obtained in the step S2 is more than 0.05mol/L; the concentration of copper salt in the solution obtained in the step S2 is more than 0.025mmol/L. The antibacterial filter screen prepared by the preparation method is characterized in that the glass fiber is loaded with the nano copper-carbon composite, the nano copper-carbon composite has a structure that the oxygen-enriched nano carbon particles are loaded with nano copper particles, and the oxygen-enriched nano carbon refers to the structure of the nano carbon particles rich in oxygen-containing groups. Because the oxygen-enriched nano carbon particles are converted from reducing sugar, although the main body of the particles is carbon