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Bactericidal gas-permeable film as well as preparation method and application thereof

A breathable film and film technology, applied in medical science, bandages, absorbent pads, etc., can solve problems such as difficult application of medical supplies, and achieve the effects of low cost, high toughness cost, and high reuse rate

Active Publication Date: 2019-07-16
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vast majority of film materials are airtight, which makes it difficult to apply to industries such as medical supplies

Method used

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  • Bactericidal gas-permeable film as well as preparation method and application thereof
  • Bactericidal gas-permeable film as well as preparation method and application thereof
  • Bactericidal gas-permeable film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Take 0.1g of carbon nitride powder synthesized from urea and place it in 8g of DMF (N,N-dimethylformamide), stir it thoroughly with a magnetic stirrer for 30-60min, then use a 600W ultrasonic cleaner and continue ultrasonication for 6h to obtain carbon nitride suspension. Place the prepared suspension in a magnetic stirrer, slowly add 2g of high-molecular polymer thermoplastic polyurethane transparent granules (TPU), and continue stirring for 6 hours to obtain a coating film repellent liquid containing photocatalyst carbon nitride, and leave it overnight for 24 hours to remove Gas precipitation. Then use double-sided tape to wrap 1.5 turns on both ends of the glass rod (the thickness of the coating is 200μm), take a piece of 20*20cm clean glass, drop the upper liquid onto the surface of the glass plate, and then use the glass rod to coat the film. Place the prepared film in a blast drying oven to dry at 60-70°C for 2 hours, at 80-90°C for 3 hours, at 125°C for 4 hours,...

Embodiment 2

[0062] Change the amount of carbon nitride synthesized by urea in the coating film flooding liquid, which is 0.05, 0.1, 0.25, 0.5wt% respectively, and the others are the same as in Example 1. See 5 for the SEM image of the film finally prepared, in the figure a / b / c / d corresponds to the carbon nitride content of 0.05, 0.1, 0.25, and 0.5wt%, respectively. When the carbon nitride content is low, the carbon nitride content on the surface of the 0.05wt% film material is insufficient, and the surface of the material is not completely covered. , when the content is large, the 0.5wt% carbon nitride powder cannot be fully dispersed and suspended during the dispersion process, and it is the first to agglomerate among the carbon nitride powders, causing the block in Figure d to appear, and the block is a large number of small particles agglomerated cause. Therefore, carbon nitride is preferably less than 0.5wt% in the coating film flooding liquid, and a content of 0.1wt%-0.25wt% is a be...

Embodiment 3

[0065] The drying temperature in the third stage of film gradient drying was changed to 95° C. for 4 hours and 125° C. for 4 hours. Other experimental conditions were the same as in Example 1.

[0066] Figure 6 In a is the SEM image of the film dried at 95°C for 4 hours, and there are no large number of pores on the surface of the film. Figure 7 Middle b is the SEM image of the film dried at 125°C for 4 hours, and a large number of pores appear on the surface of the film.

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Abstract

The invention discloses a bactericidal gas-permeable film as well as a preparation method and application thereof. The bactericidal gas-permeable film contains carbon nitride and has ventilation holeswith a pore diameter of 100-200 nm. The preparation method of the bactericidal gas-permeable film comprises the following steps: forming a film by a precursor solution containing the carbon nitride,a high-molecular polymer and an organic solvent, performing pre-drying, after the pre-drying is completed, performing drying at 110-130 DEG C, and removing the organic solvent to form the ventilationholes. According to the preparation method provided by the invention, the film prepared by the method has bactericidal action under visible light, is air-permeable, and can be applied to the fields ofantibacterial adhesive bandages, infusion tapes, medical dressings, bandages, medical adhesive tapes, medicated plaster cloths, greenhouse films, fresh-keeping bags, valve bags, water purification devices and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic new materials for loaded functional films, and in particular relates to a bactericidal breathable film and its preparation method and application. Background technique [0002] As a new type of non-toxic, green, environmentally friendly and low power consumption technology, photocatalytic sterilization technology has received extensive attention and research in the fields of water pollution treatment, medical equipment, and medical care. The problem of bacterial pollution is becoming more and more prominent, especially in aspects related to the safety of human life, such as bacterial water pollution, bacterial medical equipment pollution, and bacterial food pollution, which have received more attention. Every year, more than 1.5 million people die from water pollution caused by bacteria. There are many cases of doctors or patients being killed by the use of bacteria-contaminated medical dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L33/20C08K3/28C08J5/18A61L15/18A61L15/42A61L15/26A61L15/24
CPCA61L15/18A61L15/24A61L15/26A61L15/42A61L15/425C08J5/18C08J2333/20C08J2375/04C08K3/28C08L75/04C08L33/20
Inventor 王赪胤袁猛王思聪翟存惠戴佳旸
Owner YANGZHOU UNIV
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