Raws li kev tshawb fawb tshiab luam tawm nyob rau hauv 《Applied Materials Today 》, Cov khoom siv tshiab ua los ntawm cov nanofibres me me tuaj yeem hloov cov khoom siv phom sij uas siv rau hauv cov pawm thiab cov khoom siv tu cev niaj hnub no.
Cov ntawv sau ntawv, los ntawm Indian Institute of Technology, hais tias lawv cov khoom tshiab tsis muaj kev cuam tshuam rau ib puag ncig thiab muaj kev nyab xeeb dua li cov neeg siv niaj hnub no.
Ob peb xyoos dhau los no, cov ntaub so ntswg pov tseg, tampons thiab lwm yam khoom siv huv huv tau siv cov khoom siv absorbent resins (SAPs) ua absorbers.Cov tshuaj no tuaj yeem nqus tau ob peb zaug lawv qhov hnyav hauv cov kua;Cov pawm nruab nrab tuaj yeem nqus tau 30 npaug ntawm nws qhov hnyav hauv lub cev.Tab sis cov khoom siv tsis biodegrade: nyob rau hauv cov xwm txheej zoo tagnrho, cov ntaub qhwv tuaj yeem siv sijhawm txog 500 xyoo kom degrade.SAPs kuj tuaj yeem ua rau muaj teeb meem kev noj qab haus huv xws li tshuaj lom neeg poob siab, thiab lawv raug txwv los ntawm tampons hauv xyoo 1980s.
Ib qho khoom siv tshiab ua los ntawm electrospun cellulose acetate nanofibers tsis muaj qhov tsis zoo no.Hauv lawv txoj kev tshawb fawb, pab pawg tshawb fawb tau tshuaj xyuas cov khoom, uas lawv ntseeg tias tuaj yeem hloov SAPs tam sim no siv hauv cov khoom siv tu cev ntawm poj niam.
"Nws yog ib qho tseem ceeb los txhim kho lwm txoj kev nyab xeeb rau cov khoom lag luam, uas tuaj yeem ua rau mob toxic shock syndrome thiab lwm yam tsos mob," Dr Chandra Sharma, tus sau ntawv sau.Peb hais kom tshem tawm cov khoom tsis zoo uas siv hauv cov khoom lag luam tam sim no thiab cov khoom siv tsis yog biodegradable superabsorbent resins vim tsis hloov cov khoom lag luam lossis txawm tias txhim kho nws cov dej nqus thiab kev nplij siab.
Nanofibers yog cov fibers ntev thiab nyias uas tsim los ntawm electrospinning.Vim tias lawv qhov chaw loj, cov kws tshawb fawb ntseeg tias lawv nqus tau ntau dua li cov ntaub ntawv uas twb muaj lawm.Cov khoom siv nyob rau hauv cov khoom lag luam tampons yog ua los ntawm lub tiaj, banded fibers txog 30 microns qab.Nanofibers, los ntawm qhov sib piv, yog 150 nanometers tuab, 200 npaug ntawm cov khoom siv tam sim no.Cov khoom siv tau yooj yim dua li cov khoom siv uas twb muaj lawm thiab tawm tsawg dua residue tom qab siv.
Cov khoom siv nanofiber kuj ntxeem tau (tshaj 90%) piv rau cov pa (80%), yog li nws yog absorbent ntau dua.Ib qho ntxiv tuaj yeem ua tau: siv cov tshuaj ntsev thiab cov tshuaj tua cov zis, cov khoom siv hluav taws xob electrostatic yog absorbent ntau dua li cov khoom lag luam.Lawv kuj tau sim ob lub qauv ntawm cov khoom siv nanofibre nrog SAPs, thiab cov txiaj ntsig tau pom tias nanofibre ib leeg ua haujlwm zoo dua.
"Peb cov txiaj ntsig tau pom tias electrostatic textile nanofibers ua tau zoo dua li cov khoom lag luam huv hauv cov ntsiab lus ntawm kev nqus dej thiab kev nplij siab, thiab peb ntseeg tias lawv yog cov neeg sib tw zoo los hloov cov khoom tsis zoo uas siv tam sim no," Dr. Sharma hais."Peb cia siab tias yuav muaj kev cuam tshuam zoo rau tib neeg kev noj qab haus huv thiab ib puag ncig los ntawm kev siv nyab xeeb thiab pov tseg cov khoom siv huv huv.
Post lub sij hawm: Mar-08-2023