Application of Nanofibers in Virus and Bacteria Filtration

Abstract

Air pollution is an increasing concern all over the world due to its adverse effects on human health. It claims thousands of lives every year. Hence, the demand for the ventilator, respirator, facemask, body protection, and hospital air filtration has been surging dramatically during the COVID-19 pandemic. Nanofiber membranes with optimal characteristics, such as a high specific surface area and porous microstructure with interconnected pores, can efficiently capture the fine particles (such as bacteria, fungi, virus, etc.). Recently, various types of polymers have been fabricated as electrospun fibrous membranes to be used as an anti-bacterial or anti-viral air filtration media. This review presents a brief overview of air filtration history and its main mechanisms and then the latest research about air filtration with antibacterial and antiviral properties will be reviewed.

Preparation of porous polylactic acid nanofibers and application in non-electret high-efficiency filtration composites

“…9,11,13,26 The interception (0.1–1 μm) and inertial impaction (0.5–1 μm) mainly affect particles larger than 0.3 μm, whereas Brownian diffusion is the main filtering mechanism for particles of 0.1 μm. 9,11,26…”

“…6,7 Furthermore, recent ndings have proved that viruses carried in PM 2.5 are one of the important potential causes of the worldwide outbreak of the COVID-19 pandemic. 4,[8][9][10] At present, emission reduction and passive ltration are the main effective solutions to alleviate the threats of and damage caused by particulate matter. 11 Therefore, lter materials for personal protection and indoor air purication that can effectively capture particulate matter, are in high demand in recent years.…”

Integration of Zn2+, ATP, and bFGF to Nanodressing with Core–Shell Structure Fabricated by Emulsion Electrospinning for Wound Healing

“…Compared with the blank group (94.87%), bFGF/PCL (70.75%) and bFGF-ATP-Zn/PCL (54.72%) groups showed significantly larger healing areas ( P < 0.001), indicating that the amount of bFGF released from the nanodressings was sufficient for initial wound healing. The PBS/PCL (79.80%) without active bFGF also promoted wound healing, which mainly benefited from the inherent bacteria isolation effect and breathability of nanofibers materials . bFGF gel (78.58%) showed a similar healing rate with PBS/PCL, but it resulted in thicker scabs.…”

“…The PBS/PCL (79.80%) without active bFGF also promoted wound healing, which mainly benefited from the inherent bacteria isolation effect and breathability of nanofibers materials. 47 bFGF gel (78.58%) showed a similar healing rate with PBS/PCL, but it resulted in thicker scabs. After the 7-day injury, all the wound surfaces were covered with scabs, effectively protecting them from airborne bacteria and harmful substances.…”

Directly Self-Assembly of Aligned Ag NWs Films at the Air–Water Interface for the Detection of Pathogens in Artificial Breath Aerosols

“…Nowadays, some exquisite SERS strategies have been developed for the sensitive detection of pathogens such as adaptor-functionalized SERS substrates, hydrophobic substrates, magnetic enrichment strategies, , and various novel nanostructures. ,, However, there are few reports focusing on the direct identification of pathogens and the detection of pathogens in exhaled aerosols, which are of great significance for responding to emergency public health and safety incidents. A sensitive and stable SERS substrate was essential to capture reproducible SERS bacteria signals for the detection and identification of bacteria species .…”