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Recycled mask, preparation method and recycling method

A mask and fiber technology, applied in the field of preparation and recycling of masks, can solve the problems of long time natural degradation, short protection period, difficult long-term use, etc., to achieve high particle interception efficiency, sterilization and inactivation ability, strong adhesion The effect of adhesion, antibacterial and strong bactericidal ability

Pending Publication Date: 2021-04-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effective protection period of ordinary masks is short, and the filtration efficiency of particulate matter and bacteria gradually decreases after 2 to 4 hours, making it difficult to use them for a long time. The consumption of masks by the general public and medical staff is increasing day by day
At the same time, a large amount of dust, particles, bacteria and even viruses remain on the surface of the mask after use. Ordinary masks have no obvious killing effect on bacteria and viruses, especially bacteria, which have a strong ability to reproduce and survive. In addition, the public's awareness of self-protection is weak. Contact with the contaminated surface of the mask during use, or unsafe handling of the mask after use, can easily increase the risk of infection (Fadare O O , Okoffo E D . Covid-19 face masks: A potential source of microplastic fibers in the environment [J]. Science of The Total Environment, 2020.)
From the perspective of environmental protection, the main components of masks are polypropylene or other synthetic polymer materials, which take a long time to degrade naturally. Unreasonable recycling and random discarding will cause long-term environmental pollution and increase the burden on the ecosystem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Recycled mask, preparation method and recycling method
  • Recycled mask, preparation method and recycling method
  • Recycled mask, preparation method and recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A recyclable mask comprises: a mask fiber as a base, and a highly dense nano film formed by polyphenol-metal complexing on the surface of the base.

[0046] Wherein, the raw material of described nano-film comprises plant polyphenol, metal ion and complexation enhancer solution, and the mass concentration ratio of described plant polyphenol and metal ion is 4:1~4:3; The complexation enhancer solution The pH is 6-8, and the ingredients include any one or more of anhydrous citric acid, disodium hydrogen phosphate dodecahydrate, sodium bicarbonate, sodium hydroxide, sodium carbonate, etc.; the plant polyphenols include but are not limited to Any one or more of tea polyphenols, catechins, tannic acid, gallic acid, black wattle, bayberry tannin; the metal ion includes but not limited to Gu 2+ , Yb 2+ , Zn 2+ 、Sm 3+ , La 2+ 、Gd 2+ , Fe 3+ any one or more of them.

[0047] The plant polyphenol solution, the metal ion solution and the complexing enhancer solution used in...

Embodiment 2

[0051] Method for preparing reusable masks:

[0052] The plant polyphenol solution and the metal ion solution are mixed according to the volume ratio of 1:1 and then sprayed on the surface of the base mask fiber to complete the first spraying; then the complexation enhancer solution is used for the second spraying to form a stable nano-film, and then use Rinse with water, remove excess impurities, and dry naturally.

[0053] Wherein, the total volume ratio of the complexation enhancer solution to the plant polyphenol solution to the metal ion solution is 1:1˜3:1.

[0054] For the first time, the plant polyphenol solution was mixed with the metal ion solution in order to make the polyphenol-metal form a low ligand and attach to the surface of the mask fiber, laying the foundation for the formation of a dense polyphenol-metal supramolecular network structure protective film. When spraying the complexation enhancer solution for the second time, it promotes the in-situ formation ...

Embodiment 3

[0056] How to recycle masks:

[0057] Spray cleaning agent on the surface of the mask after use and rinse it with water to dissociate the nano-film formed by plant polyphenols, metal ions and complexing enhancer solution, and at the same time remove the particles and killed particles adhering to the nano-film Bacteria and viruses are also removed.

[0058] Wherein, the cleaning agent includes but not limited to nitric acid, EDTA, acetic acid, the mass percent concentration of the cleaning agent is 2.0% to 5.0%, and the volume of the cleaning agent is the volume of the plant polyphenol solution and the metal ion solution. 1 to 10 times the total volume.

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Abstract

The invention belongs to the field of mask protection, and particularly discloses a recyclable mask, a preparation method and a recycling method. The recyclable mask comprises mask fibers serving as a substrate and a highly-compact nano-film which is formed by complexing polyphenol metal and wraps the surface of the substrate. Compared with masks prepared by other improvement means such as adding an activated carbon layer and a graphene layer and installing an air filter, the mask does not change the original shape of the mask, normal wearing is not affected, meanwhile, the structure and components of original fibers of the mask are not changed, and the air permeability is also improved. Neither polyphenol nor metal ions can be fixed on the mask fibers independently, through compounding and two times of spraying, the polyphenol and the metal ions form a high-density nano-composite on the surface of the mask fibers, and the adhesivity and the antibacterial property of the nano-composite enable the mask to have higher particle interception efficiency and sterilization, antivirus and inactivation capabilities.

Description

technical field [0001] The invention relates to the field of mask protection, in particular to a recyclable mask, a preparation method and a recycle method. Background technique [0002] In the history of human development, global epidemics caused by severe bacteria and viruses have occurred from time to time, including SARS-CoV, MERS, and SARS-CoV-2 (Andersen K G , Rambaut A , Lipkin W I , et al. The proximal origin of SARS- CoV-2[J]. Nature Medicine, 2020, 26(4).), which is characterized by sudden outbreak, high infectivity, wide spread and strong lethality, causing huge losses to human health, economic development and even environmental protection . [0003] In the face of acute infectious diseases, people can only trace the pathogens after the outbreak of the epidemic, so as to develop targeted vaccines, which is a passive defense; and the development of vaccines is difficult, requiring huge manpower, material and financial resources; from the outbreak of the epidemic t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A41D13/11A41D31/30
CPCA41D13/1192A41D31/305
Inventor 郭俊凌胡廷王晓玲王毓龚贵东
Owner SICHUAN UNIV
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