Non-woven film and charged non-woven biological protection mask prepared by same and preparation method

A non-woven film and non-woven technology, applied in the field of biological protection, can solve the problems of poor mask suitability, poor face mask, unsatisfactory virus protection effect of N95 mask, etc. , good veneer effect

Inactive Publication Date: 2014-04-16
ARMY MEDICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, the most important feature of the new N95 filter mask prepared by adopting the new dust respiratory protection standard NIOSH-42CFR84 of the National Institute of Occupational Safety and Health (NIOSH) is that it can prevent the droplet infection caused by the patient's body fluid or blood splash, its filtration efficiency and protection The effect is obviously better than that of ordinary gauze masks, but it still has the following disadvantages: (1) About 10%-20% of people do not fit the mask well, and the mask cannot be well veneered; (2) N95 masks are not suitable for The protective effect of infectious viruses is not ideal; (3) The filter materials of most N95 masks are made of difficult-to-degrade polymers such as polypropylene, which will bring great pressure to the environment after being discarded in large quantities

Method used

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  • Non-woven film and charged non-woven biological protection mask prepared by same and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 Preparation of Zein Nanoscale Nonwoven Membrane

[0037] Prepare an ethanol solution with a volume fraction of 70%; then add a certain amount of zein into the solution, stir until it is completely dissolved, and prepare a 25% zein-ethanol mixture by mass; finally add it to the mixture Add an appropriate amount of plasticizer tributyl citrate, use the self-made electrospinning device, adjust to the designed process conditions, and start electrospinning: put the mixed solution with plasticizer into a 10ml syringe, A metal receiver plate was placed 15 cm from the needle to collect the spin. An electric field of 1.5kV / cm is added between the needle and the metal receiving plate, and the driving speed of the micro-injection pump is 0.6ml / h. Under the push of the micro-injection pump, the mixed solution is evenly sprayed onto the surface of the metal plate to form a corn alcohol solution. Nanoscale fiber non-woven membrane made of protein.

Embodiment 2

[0038] Example 2 Preparation of Charged Nonwoven Medical Functional Biological Protective Mask Based on Electrospinning Technology

[0039] Because viruses, bacteria, and biological aerosols all have negative charges, if the nanofiber nonwoven membrane is charged to make it positively charged, it can more effectively absorb and filter bacteria, viruses, and biological aerosols in the air. , can significantly improve its filtration efficiency. However, zein itself is not charged. In order to charge the zein nonwoven film, chitosan, a natural polysaccharide with good safety and biocompatibility, can be selected as the charging agent. Zein nonwoven film or nanofiber nonwoven film is charged. Specifically include the following steps:

[0040] 1. Preparation of outer layer electrospinning solution

[0041] Prepare 2% acetic acid solution by diluting glacial acetic acid with water, add a certain amount of polyvinyl alcohol into the solution, heat and stir until completely dissolv...

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Abstract

The invention belongs to the field of biological protection, and particularly relates to a non-woven film and a charged non-woven biological protection mask prepared by the same and a preparation method thereof. Zein is used as raw materials by the non-woven film, the zein is abundant in source, low in cost and biodegradable, and the zein has the functions of being skin loving, oxidation resistance, ultraviolet ray resistance, bacterium resistance and the like, better face attaching performance can be achieved after the non-woven film is spun. According to the charged nanofiber non-woven biological protection mask prepared by the non-woven film, the inner layer of the mask is the non-woven film prepared by the zein, positive electric charges are attached on an outer layer, and the filter efficiency of the mask can be improved obviously. A charged nanofiber non-woven double-layer film prepared through an electrospinning technique can isolate virus through the dual functions of electrical charge absorption and mechanical isolation, an effective protective function is performed, and the charged non-woven biological protection mask can be used as a medical functional type biological protection mask.

Description

technical field [0001] The invention belongs to the field of biological protection, in particular to a nonwoven film and a charged nanofiber nonwoven medical functional biological protective mask prepared by using the nonwoven film, and a charged nanofiber nonwoven medical functional mask prepared based on electrospinning technology Type biological protective mask method. Background technique [0002] Biological protection has always been a major issue in natural disasters and wars. The protection in the rescue process such as earthquakes and floods, as well as the protection against epidemic viruses such as SARS and H1N1, all require biological protective masks with excellent performance; Rescue and protection present new challenges. But currently on the market, there are few practical masks with good barrier function to solid liquid and microorganisms, good air permeability and comfort, and low price. [0003] In recent years, the most important feature of the new N95 f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4374D04H1/4382D04H1/728A41D13/11
Inventor 李振声孙丽丽杨晓占董世武郭洪峰
Owner ARMY MEDICAL UNIV
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