Tou de Òganizasyon Mondyal Lasante ak Sant Ameriken pou Kontwòl Maladi rekonèt ke aerosol yo se mekanis prensipal pou pwopagasyon viris COVID-19 la. Ayewosòl yo se ti patikil dlo oswa lòt sibstans ki ka rete sispann nan lè a pou peryòd tan, piti ase yo penetre sistèm respiratwa a.
Moun yo lage aerosol lè yo respire, touse, pale, rele oswa chante. Ayewosol sa yo kapab genyen viris la tou si yo enfekte ak COVID-19. Lè w respire ase kantite aerosol coronavirus ka fè yon moun malad. Lè yo mande moun yo mete mask, amelyore vantilasyon andedan kay la ak sistèm filtraj lè yo, diminye ekspoze pèsonèl ak diminye kantite total ayewosòl nan anviwònman an se priyorite pou kwape pwopagasyon ayewosòl COVID-19 la.
Rechèch sou nouvo viris enfektye yo danjere, epi li relativman ra nan laboratwa ki gen pi wo nivo biosekirite. Tout etid ki fèt jiska prezan sou mask oswa efikasite filtraj pandan pandemi an te itilize lòt materyèl ki te panse pou imite gwosè ak konpòtman aerosol SARS-CoV-2. Nouvo etid la amelyore sou sa, tès solisyon saline ak aerosol ki gen yon coronavirus ki soti nan menm fanmi ak viris la ki lakòz COVID-19 men sèlman enfekte sourit.
Yun Shen and George Washington University colleague Danmeng Shuai created a nanofiber filter that delivers a high voltage through a drop of polyvinylidene fluoride liquid to a spinning thread about 300 nanometers in diameter—about 167 times thinner than a human hair . This process created pores just a few micrometers in diameter on the nanofibers’ surface, helping them capture 99.9 percent of coronavirus aerosols.
Teknik pwodiksyon an, ke yo rekonèt kòm electrospinning, se pri-efikas epi yo ka itilize an mas-pwodwi filtè nanofib pou ekipman pwoteksyon pèsonèl ak sistèm filtraj lè. Elektwospinning tou kite yon chaj elektwostatik sou nanofibr yo, ki amelyore kapasite yo nan kaptire ayewosòl, ak gwo porosite li fè li pi fasil yo respire pandan y ap mete yon filtè nanofib electrospun.
“Electrospinning technology can facilitate the design and manufacture of masks and air filters,” said Prof. Yun Shen. “Using electrospinning technology to develop new types of masks and air filters has good filtration performance, economic feasibility and scalability. Being able to meet the demand for masks and air filters in the field is very promising.”
Tan poste: Nov-01-2022
