Nanofibras biodegradáveis eletrofiadas aplicadas à filtração de ar do SARS-CoV-2 Simulado
Abstract
One of the lasting outcomes of the COVID-19 pandemic was the production and
deposition of plastics. These materials, particularly disposable face masks, end up in the
environment, releasing microplastics and other pollutants. Although the pandemic has ended,
disposable face masks continue to be essential in healthcare services and major cities to mitigate
the effects of increasing air pollution. This study aimed to create a viable alternative to
disposable face masks made from non-degradable polymers. It utilized polyvinyl alcohol (PVA)
and chitosan (CS) as natural and biodegradable polymers to produce air filters using the
electrospinning technique. Solution properties, such as rheology and conductivity, were
investigated using Design of Experiments (DoE), particularly Response Surface Methodology
(RSM), to optimize nanofiber production, dimensions, and air filtration capabilities, achieving
filtration efficiencies of up to 99%, superior to N95 face masks. Nanostructures present in our
electrospun fiber mat, known as spider-nets, were tailored to further enhance the fiber mat
properties. Our tests also examined the mechanical properties of the air filters, adjusting their
mechanical strength and hydrophobicity, further improving our fibers to withstand higher air
filtration velocities. This study has already achieved its main goals, providing a viable and
biodegradable alternative to traditional discardable facemasks, complying with regulations
worldwide, and contributing to the current trend among scientists to transition to more
ecological materials.
Collections
The following license files are associated with this item: