Ob Lub Koom Haum Ntiaj Teb Kev Noj Qab Haus Huv thiab Asmeskas Lub Chaw Tiv Thaiv Kab Mob lees paub tias aerosols yog lub hauv paus txheej txheem rau kev kis tus kab mob COVID-19. Aerosols yog cov khoom me me ntawm dej lossis lwm yam khoom uas tuaj yeem nyob twj ywm hauv huab cua rau lub sijhawm ntev, me me kom nkag mus rau hauv lub ntsws.
Tib neeg tso aerosols thaum lawv ua pa, hnoos, tham, qw lossis hu nkauj. Cov aerosols no tuaj yeem muaj tus kab mob no yog tias lawv kis tus kab mob COVID-19. Kev nqus tau cov kab mob coronavirus aerosols txaus tuaj yeem ua rau tus neeg mob. Los ntawm kev xav kom tib neeg hnav lub qhov ncauj qhov ntswg, txhim kho qhov cua sab hauv tsev thiab lub tshuab lim cua, txo qhov raug tus kheej thiab txo tag nrho cov aerosols hauv ib puag ncig yog qhov tseem ceeb rau kev txwv tsis pub kis ntawm COVID-19 aerosols.
Kev tshawb fawb txog cov kab mob tshiab kis tau yog qhov txaus ntshai, thiab tsis tshua muaj nyob hauv cov chaw sim nrog qib siab tshaj ntawm biosafety. Txhua qhov kev tshawb fawb txog hnub tim ntawm lub qhov ncauj qhov ntswg lossis kev pom kev ua haujlwm zoo thaum muaj kev sib kis tau siv lwm cov ntaub ntawv xav kom ua raws li qhov loj thiab tus cwj pwm ntawm SARS-CoV-2 aerosols. Txoj kev tshawb fawb tshiab no txhim kho qhov ntawd, sim cov tshuaj aerosolized saline daws thiab aerosols uas muaj tus mob coronavirus los ntawm tib tsev neeg li tus kab mob uas ua rau COVID-19 tab sis tsuas kis rau nas.
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.
Cov txheej txheem tsim khoom, hu ua electrospinning, yog tus nqi tsim nyog thiab tuaj yeem siv los tsim cov lim dej nanofiber rau cov khoom siv tiv thaiv tus kheej thiab cov tshuab lim cua. Electrospinning tseem tso cov nqi hluav taws xob ntawm cov nanofibers, uas txhim kho lawv lub peev xwm los ntes cov aerosols, thiab nws cov porosity siab ua rau nws yooj yim rau ua pa thaum hnav lub lim dej electrospun nanofiber.
“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.”
Post lub sij hawm: Nov-01-2022
