PM2.5 filtering SPAP film with antibacterial and antifouling functions and preparation method thereof

Abstract

The invention discloses a preparation method of a PM2.5 filtering SPAP membrane with antibacterial and antifouling functions, which comprises the following steps: degumming silkworm cocoons, cleaning, drying to obtain fibroin, and dissolving the fibroin in a lithium bromide solution; after complete dissolution, dialyzing the silk fibroin solution, and freezing after suction filtration to obtain freeze-dried silk fibroin; the silver nitrate solution is added into the polyurethane solution, and the mixed PU-AgNPs solution is changed into brown yellow from transparent; preparing an SFNFs membrane from an SF solution obtained by dissolving the freeze-dried fibroin through electrostatic spinning; a PU-AgNPs solution is deposited on the surface of the SFNFs film through electrostatic spinning, and PUNF-AgNPs is obtained; according to the invention, an alternate electrospinning-electrospraying technology is adopted, the hydrophilic SFNFs layer has good air permeability and skin affinity and can be used as a friendly biological interface, and the PUNSs layer has inherent waterproofness and high surface roughness and can be used as a super-hydrophobic antifouling physical barrier to shield invasive PM2.5 threat, so that the SPAP film has the advantages of good air permeability, good skin affinity and good water resistance. And an antibacterial filter PUNF-AgNPs is inserted in the middle of the filter and can be used for secondary filtration and antibiosis.

Description

technical field [0001] The invention relates to the field of antibacterial protection or air filtration, in particular to a preparation method of a PM2.5 filter SPAP membrane with antibacterial and antifouling functions. Background technique [0002] With the accelerated development of the industrialization process, air pollution is becoming more and more serious. PM2.5 (particles with a diameter of ≤2.5 μm) in the air can enter the bronchi and even the alveoli, and will also be deposited in the alveoli or absorbed into the blood and lymph fluid. Large scale will cause great damage to the human respiratory system, cardiovascular system and nervous system. At the same time, microorganisms, bacteria, and infectious disease viruses often attach to air particles. One of the ways to effectively block the spread of microorganisms, bacteria, and infectious disease viruses is to filter and remove air particle pollutants. Therefore, the use of air filter materials to resist air poll...

AI Technical Summary

Problems solved by technology

[0003] Traditional air filter materials have shortcomings such as weak anti-pollution ability, little filtering effect on tiny particles, and poor protection against viruses and bacteria. In order to make up for the shortcomings of traditional filter materials, the development of high value-added filter materials with antibacterial functions imperative

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