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Bactericidal breathable film and its preparation method and application

A breathable film and film technology, applied in bandages, absorbent pads, medical science, etc., can solve problems such as difficult application of medical supplies, and achieve the effect of low cost, simple preparation process, and strong elasticity

Active Publication Date: 2021-09-28
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 breathable film and its preparation method and application
  • Bactericidal breathable film and its preparation method and application
  • Bactericidal breathable film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 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. Put the prepared suspension in a magnetic stirrer, slowly add 2g of high molecular polymer thermoplastic polyurethane transparent granules (TPU), 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 circles 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, and...

Embodiment 2

[0063] Change the amount of carbon nitride synthesized by urea in the coating film flooding liquid, respectively 0.05, 0.1, 0.25, 0.5wt%, and the others are the same as in Example 1. The SEM image of the finally prepared film is shown in Figure 5 , the content of a / b / c / d corresponding to carbon nitride in the figure is 0.05, 0.1, 0.25, 0.5wt%, respectively, and when the carbon nitride content is low, the surface carbon nitride content of 0.05wt% film material is insufficient, The surface of the material is not completely covered, and 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 between the carbon nitride powders to cause Figure 5 The block in d appears, and the block is caused by the agglomeration of a large number of small particles. Therefore, carbon nitride is preferably less than 0.5 wt% in the coating flooding liquid, and the content of 0.1 wt%~0.25 w...

Embodiment 3

[0066] 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.

[0067] Figure 7 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 breathable film, a preparation method and application thereof. The bactericidal breathable film contains carbon nitride and has air holes with a diameter of 100-200 nm. The preparation method of the bactericidal breathable film includes: after forming a film from a precursor solution containing carbon nitride, a high molecular polymer and an organic solvent, pre-drying, drying at 110-130°C after the pre-drying, and then removing the organic The solvent forms vent holes. The film prepared by the present invention has a bactericidal effect under visible light and is breathable, and can be used in antibacterial band-aids, infusion patches, medical dressings, bandages, medical adhesive plasters, plasters, greenhouse films, fresh-keeping bags, self-sealing bags, water purification devices, etc. field.

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 Patents(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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