Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Republic of Korea
Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, 34113 Republic of Korea
Gwiritsani ntchito ulalo womwe uli pansipa kuti mugawane zolemba zonse za nkhaniyi ndi anzanu komanso anzanu.Dziwani zambiri.
Chifukwa cha mliri wa coronavirus komanso zovuta zokhudzana ndi zinthu (PM) mlengalenga, kufunikira kwa masks kwakula kwambiri.Komabe, zosefera zachikhalidwe zozikidwa pamagetsi osasunthika ndi sieve ya nano zonse zimatha kutaya, zosawonongeka kapena kubwezeredwa, zomwe zingayambitse zovuta zowonongeka.Kuonjezera apo, yoyambayo idzataya ntchito yake pansi pa chinyezi, pamene yotsirizirayo idzagwira ntchito ndi kutsika kwakukulu kwa mpweya komanso kutseka kwa pore mofulumira kudzachitika.Apa, fyuluta yowonongeka, yotsimikizira chinyezi, yopuma kwambiri, yogwira ntchito kwambiri ya fiber mask yapangidwa.Mwachidule, maulusi awiri a biodegradable ultrafine ndi mateti a nanofiber amaphatikizidwa mu sefa ya Membala ya Janus, kenako amakutidwa ndi ma nanowhiskers a chitosan.Fyulutayi ndiyothandiza ngati fyuluta yamalonda ya N95 ndipo imatha kuchotsa 98.3% ya 2.5 µm PM.Nanofibers amawonetsa tinthu tating'onoting'ono, ndipo ulusi wa ultrafine umapereka kusiyana kocheperako kwa 59 Pa, komwe kuli koyenera kupuma kwa munthu.Mosiyana ndi kuchepa kwakukulu kwa ntchito zosefera zamalonda za N95 zikakhala ndi chinyezi, kutayika kwa magwiridwe antchito a fyulutayi ndikosayenera, kotero kungagwiritsidwe ntchito kangapo chifukwa dipole losatha la chitosan adsorbs ultrafine PM (mwachitsanzo, nayitrogeni).ndi sulfure oxides).Ndikofunika kuti fyulutayi iwonongeke mu nthaka ya kompositi mkati mwa masabata anayi.
Mliri wa coronavirus womwe sunachitikepo (COVID-19) ukuchititsa kufunikira kwakukulu kwa masks.[1] Bungwe la World Health Organisation (WHO) likuyerekeza kuti masks azachipatala 89 miliyoni akufunika mwezi uliwonse chaka chino.[1] Sikuti akatswiri azachipatala amangofunika masks apamwamba a N95, koma masks ofunikira kwa anthu onse akhalanso zida zofunikira tsiku lililonse popewa matenda opatsiranawa.[1] Kuphatikiza apo, mautumiki oyenerera amavomereza mwamphamvu kugwiritsa ntchito masks otayidwa tsiku lililonse, [1] izi zadzetsa mavuto azachilengedwe okhudzana ndi kuchuluka kwa zinyalala za chigoba.
Popeza ma particulate matter (PM) ndivuto lalikulu kwambiri lowononga mpweya, masks akhala njira yabwino kwambiri yothanirana ndi anthu.PM imagawidwa mu PM2.5 ndi PM10 molingana ndi kukula kwa tinthu (2.5 ndi 10μm motsatana), zomwe zimakhudza kwambiri chilengedwe [2] komanso moyo wamunthu m'njira zosiyanasiyana.[2] Chaka chilichonse, PM imayambitsa kufa kwa 4.2 miliyoni ndi zaka 103.1 miliyoni zosinthika za olumala.[2] PM2.5 imayika chiwopsezo chachikulu ku thanzi ndipo imasankhidwa kukhala gulu loyamba la carcinogen.[2] Chifukwa chake, ndi nthawi yake komanso yofunikira kuti tifufuze ndikupanga fyuluta yogwira bwino ya chigoba potengera mpweya komanso kuchotsedwa kwa PM.[3]
Nthawi zambiri, zosefera zachikhalidwe zimajambula PM m'njira ziwiri zosiyana: kudzera mu sieving yotengera nanofibers ndi electrostatic adsorption yotengera ma microfibers (Chithunzi 1a).Kugwiritsa ntchito zosefera zochokera ku nanofiber, makamaka ma electrospun nanofiber mats, zatsimikizira kuti ndi njira yabwino yochotsera PM, yomwe ili chifukwa cha kupezeka kwazinthu zambiri komanso kapangidwe kazinthu zowongolera.[3] Masamba a nanofiber amatha kuchotsa tinthu tating'onoting'ono tomwe timayang'ana, zomwe zimayambitsidwa ndi kusiyana kwa kukula pakati pa particles ndi pores.[3] Komabe, ulusi wa nano-scale uyenera kupakidwa mochuluka kwambiri kuti upange ma pores ang'onoang'ono, omwe ndi owopsa pakupumira kwamunthu chifukwa cha kusiyana kwakukulu kokhudzana ndi kuthamanga.Kuphatikiza apo, mabowo ang'onoang'ono adzatsekedwa mwachangu.
Komano, meltblown ultra-fine fiber mat ndi electrostatically charged ndi mkulu-mphamvu magetsi munda, ndi tinthu tating'ono kwambiri anagwidwa ndi electrostatic adsorption.[4] Monga chitsanzo choyimira, chopumira cha N95 ndi chopumira cha nkhope-sefa chomwe chimakwaniritsa zofunikira za National Institute of Occupational Safety and Health chifukwa chimatha kusefa osachepera 95% a tinthu tating'onoting'ono ta mpweya.Fyuluta yamtunduwu imatenga ultrafine PM, yomwe nthawi zambiri imakhala ndi zinthu za anionic monga SO42− ndi NO3-, kupyolera mu kukopa kwamphamvu kwa electrostatic.Komabe, static charge pamwamba pa fiber mat imatayidwa mosavuta m'malo onyowa, monga omwe amapezeka mu kupuma kwachinyontho kwa munthu, [4] zomwe zimapangitsa kuchepa kwa mphamvu ya adsorption.
Pofuna kupititsa patsogolo ntchito zosefera kapena kuthetsa malonda pakati pa kuchotsa bwino ndi kutsika kwa mphamvu, zosefera zochokera ku nanofibers ndi microfibers zimaphatikizidwa ndi zipangizo za k-k, monga carbon, metal organic frameworks, ndi PTFE nanoparticles.[4] Komabe, kusatsimikizika kwachilengedwe kwachilengedwe komanso kutayika kwazinthu zowonjezera izi akadali mavuto osapeŵeka.[4] Makamaka, mitundu iwiriyi ya zosefera zachikhalidwe nthawi zambiri zimakhala zosawonongeka, kotero pamapeto pake zidzakwiriridwa m'malo otayirako zinyalala kapena kuwotchedwa pambuyo pogwiritsidwa ntchito.Chifukwa chake, kupanga zosefera zachigoba zotsogola kuti zithetse mavutowa komanso nthawi yomweyo kujambula PM m'njira yokhutiritsa komanso yamphamvu ndikofunikira pakali pano.
Pofuna kuthetsa mavuto omwe ali pamwambawa, tapanga sefa ya membrane ya Janus yophatikizidwa ndi poly(butylene succinate)-based (PBS-based)[5] microfiber ndi nanofiber mats.Sefa ya membrane ya Janus idakutidwa ndi ndevu za chitosan nano (CsWs) [5] (Chithunzi 1b).Monga tonse tikudziwa, PBS ndi polima woyimira biodegradable, yemwe amatha kupanga ulusi wa ultrafine ndi nanofiber nonwovens kudzera mu electrospinning.Nano-scale fibers imatsekereza PM, pomwe ma nano-fibers ang'onoang'ono amachepetsa kutsika kwamphamvu ndikuchita ngati chimango cha CsW.Chitosan ndi zinthu zochokera ku bio zomwe zatsimikiziridwa kuti zili ndi zinthu zabwino zamoyo, kuphatikizapo biocompatibility, biodegradability ndi kawopsedwe kakang'ono, [5] zomwe zingachepetse nkhawa zomwe zimagwirizanitsidwa ndi kupuma mwangozi kwa ogwiritsa ntchito.[5] Kuphatikiza apo, chitosan ili ndi malo a cationic ndi magulu a polar amide.[5] Ngakhale pansi pa chinyezi, imatha kukopa tinthu tating'ono ta polar (monga SO42- ndi NO3-).
Apa, tikuwonetsa zosefera zomwe zimatha kuwonongeka, zowoneka bwino kwambiri, zotsimikizira chinyezi komanso zotsika kutsika kwa chigoba chotengera zinthu zomwe zimapezeka mosavuta.Chifukwa cha kuphatikiza kwa sieving ndi electrostatic adsorption, fyuluta yophatikizika ya CSW-yokutidwa ndi microfiber/nanofiber ili ndi kuthekera kochotsa kwa PM2.5 (mpaka 98%), ndipo nthawi yomweyo, kutsika kwamphamvu kwambiri pa fyuluta yokhuthala kwambiri. kokha Ndi 59 Pa, yoyenera kupuma kwa munthu.Poyerekeza ndi kuwonongeka kwakukulu kwa magwiridwe antchito komwe kumawonetsedwa ndi fyuluta yazamalonda ya N95, fyuluta iyi ikuwonetsa kutayika kopanda pake kwa kuchotsera kwa PM (<1%) ngakhale itakhala yonyowa kwathunthu, chifukwa cha chiwongola dzanja chokhazikika cha CsW.Kuphatikiza apo, zosefera zathu zimatha kuwonongeka m'nthaka ya kompositi mkati mwa milungu inayi.Poyerekeza ndi maphunziro ena ndi mfundo zofanana, imene fyuluta gawo wapangidwa zinthu biodegradable, kapena kusonyeza ntchito yochepa mu kuthekera biopolymer ntchito nonwoven, [6] fyuluta izi mwachindunji amasonyeza Biodegradability wa zinthu zapamwamba (filimu S1, mfundo zothandizira).
Monga gawo la sefa ya membrane ya Janus, ma nanofiber ndi superfine fiber PBS mateti adakonzedwa koyamba.Choncho, 11% ndi 12% PBS zothetsera zinali electrospun kupanga nanometer ndi micrometer fibers, motero, chifukwa cha kusiyana kwawo mu viscosity.[7] Tsatanetsatane wa mawonekedwe a yankho ndi mikhalidwe yabwino kwambiri ya electrospinning yalembedwa mu Table S1 ndi S2, pazothandizira.Popeza ulusi wa as-spun umakhalabe ndi zosungunulira zotsalira, bafa yowonjezera yamadzi yowonjezereka imawonjezedwa ku chipangizo cha electrospinning, monga momwe tawonetsera pa Chithunzi 2a.Kuonjezera apo, kusamba kwamadzi kungagwiritsenso ntchito chimango kusonkhanitsa coagulated pure PBS fiber mat, yomwe ndi yosiyana ndi matrix olimba pachikhalidwe (Chithunzi 2b).[7] Avereji ya fiber diameters ya microfiber ndi nanofiber mateti ndi 2.25 ndi 0.51 µm, motero, ndipo pafupifupi pore diameters ndi 13.1 ndi 3.5 µm, motero (Chithunzi 2c, d).Pamene 9: 1 chloroform / ethanol zosungunulira zimasanduka nthunzi mwamsanga pambuyo pomasulidwa ku nozzle, kusiyana kwa mamasukidwe akayendedwe pakati pa 11 ndi 12 wt% zothetsera kumawonjezeka mofulumira (Chithunzi S1, chidziwitso chothandizira).[7] Choncho, kusiyana kwakukulu kwa 1 wt% kokha kungayambitse kusintha kwakukulu kwa fiber diameter.
Musanayambe kuyang'ana ntchito ya fyuluta (Chithunzi cha S2, chidziwitso chothandizira), kuti mufanizire zosefera zosiyanasiyana moyenera, ma electrospun nonwovens a makulidwe a muyezo adapangidwa, chifukwa makulidwe ndi chinthu chofunikira chomwe chimakhudza kusiyana kwa kuthamanga ndi kusefera kwa magwiridwe antchito.Popeza nonwovens ndi ofewa ndi porous, n'zovuta kudziwa mwachindunji makulidwe a electrospun nonwovens.Kukula kwa nsalu nthawi zambiri kumakhala kolingana ndi kuchuluka kwapamtunda (kulemera pagawo lililonse, kulemera kwa maziko).Choncho, mu phunziro ili, timagwiritsa ntchito kulemera kwa maziko (gm-2) ngati muyeso wogwira mtima wa makulidwe.[8] Kukula kumayendetsedwa ndi kusintha nthawi ya electrospinning, monga momwe tawonetsera pa Chithunzi 2e.Pamene nthawi yozungulira ikuwonjezeka kuchokera pa 1 miniti kufika ku maminiti a 10, makulidwe a microfiber mat amawonjezeka kufika pa 0.2, 2.0, 5.2, ndi 9.1 gm-2, motsatira.Momwemonso, makulidwe a nanofiber mat adawonjezedwa mpaka 0.2, 1.0, 2.5, ndi 4.8 gm-2, motsatana.Makatani a Microfiber ndi nanofiber amasankhidwa ndi makulidwe awo (gm-2) monga: M0.2, M2.0, M5.2 ndi M9.1, ndi N0.2, N1.0, N2.5 ndi N4. 8.
Kusiyana kwa kuthamanga kwa mpweya (ΔP) kwa chitsanzo chonse ndi chizindikiro chofunikira cha machitidwe a fyuluta.[9] Kupuma kudzera mu fyuluta yokhala ndi kutsika kwakukulu kumakhala kovuta kwa wogwiritsa ntchito.Mwachilengedwe, zimawonedwa kuti kutsika kwamphamvu kumawonjezeka pamene makulidwe a fyuluta akuwonjezeka, monga momwe tawonetsera pa Chithunzi S3, chothandizira zambiri.Nanofiber mat (N4.8) ikuwonetsa kutsika kwamphamvu kwambiri kuposa ma microfiber (M5.2) mat pa makulidwe ofanana chifukwa mphasa ya nanofiber ili ndi pores ang'onoang'ono.Pamene mpweya umadutsa fyuluta pa liwiro pakati pa 0.5 ndi 13.2 ms-1, kutsika kwamphamvu kwa mitundu iwiri yosiyana ya zosefera kumawonjezeka pang'onopang'ono kuchokera ku 101 Pa mpaka 102 Pa. Kuchuluka kwake kuyenera kukonzedwa kuti kuthetsere kuthamanga kwa kuthamanga ndi kuchotsa PM. kuchita bwino;liwiro la mpweya wa 1.0 ms-1 ndi lomveka chifukwa nthawi yomwe imatengera kuti anthu apume pakamwa ndi pafupifupi 1.3 ms-1.[10] Pachifukwa ichi, kutsika kwapakati kwa M5.2 ndi N4.8 kumavomerezeka pa liwiro la mpweya wa 1.0 ms-1 (osakwana 50 Pa) (Chithunzi S4, chidziwitso chothandizira).Chonde dziwani kuti kutsika kwamphamvu kwa N95 ndi masks ofanana aku Korea (KF94) masks ndi 50 mpaka 70 Pa, motsatana.Kupititsa patsogolo kwa CsW ndi kuphatikizika kwa fyuluta yaying'ono / nano kumatha kukulitsa kukana kwa mpweya;choncho, kuti tipereke malire otsika, tidasanthula N2.5 ndi M2.0 tisanawerenge M5.2 ndi N4.8.
Pa liwiro la mpweya wa 1.0 ms-1, kutulutsa mphamvu kwa PM1.0, PM2.5, ndi PM10 ya PBS microfiber ndi nanofiber mateti anaphunziridwa popanda static charge (Chithunzi S5, chidziwitso chothandizira).Zikuwoneka kuti kuchotsera kwa PM nthawi zambiri kumawonjezeka ndi kuchuluka kwa makulidwe ndi kukula kwa PM.Kuchotsa bwino kwa N2.5 kuli bwino kuposa M2.0 chifukwa cha ma pores ake ang'onoang'ono.Kuchotsa kwa M2.0 kwa PM1.0, PM2.5 ndi PM10 kunali 55.5%, 64.6% ndi 78.8%, motsatana, pomwe zofananira za N2.5 zinali 71.9%, 80.1% ndi 89.6% (Chithunzi 2f).Tidawona kuti kusiyana kwakukulu pakuchita bwino pakati pa M2.0 ndi N2.5 ndi PM1.0, zomwe zikuwonetsa kuti kusefa kwa mauna a microfiber ndikothandiza kwa ma micron-level PM, koma sizothandiza kwa nano-level PM (Chithunzi. S6, chidziwitso chothandizira)., M2.0 ndi N2.5 onse akuwonetsa kuthekera kotsika kwa PM kochepera 90%.Kuonjezera apo, N2.5 ikhoza kukhala yowonongeka ndi fumbi kuposa M2.0, chifukwa tinthu tating'onoting'ono tingatseke mosavuta pores ang'onoang'ono a N2.5.Popanda static charge, sieving yakuthupi imakhala yocheperako pakutha kukwaniritsa kutsika kofunikira ndikuchotsa bwino nthawi yomweyo chifukwa cha mgwirizano wamalonda pakati pawo.
Electrostatic adsorption ndiyo njira yomwe imagwiritsidwa ntchito kwambiri kujambula PM moyenera.[11] Nthawi zambiri, mtengo wa static umagwiritsidwa ntchito mokakamiza ku fyuluta yopanda nsalu kudzera pamagetsi amphamvu kwambiri;komabe, static charge iyi imatayidwa mosavuta pansi pamikhalidwe yachinyontho, zomwe zimapangitsa kutayika kwa luso la kujambula kwa PM.[4] Monga zamoyo ofotokoza za kusefera electrostatic, ife anayambitsa 200 nm yaitali ndi 40 nm lonse CsW;chifukwa cha magulu awo ammonium ndi magulu a polar amide, nanowhiskers amenewa ali okhazikika milandu cationic.Malipiro abwino omwe alipo pamwamba pa CsW akuimiridwa ndi mphamvu zake za zeta (ZP);CsW imamwazikana m'madzi ndi pH ya 4.8, ndipo ZP yawo imapezeka kuti ndi + 49.8 mV (Chithunzi S7, chidziwitso chothandizira).
CsW-yokutidwa ndi PBS microfibers (ChMs) ndi nanofibers (ChNs) adakonzedwa ndi zokutira zosavuta mu 0.2 wt% CsW kumwazikana kwamadzi, komwe kuli koyenera kumangirira kuchuluka kwa CsWs pamwamba pa ulusi wa PBS, monga momwe tawonetsera mu chithunzi Chowonetsedwa mu Chithunzi 3a ndi Chithunzi S8, chidziwitso chothandizira.Chithunzi cha nitrogen energy dispersive X-ray spectroscopy (EDS) chikuwonetsa kuti pamwamba pa fiber ya PBS imakutidwa mofanana ndi tinthu tating'ono ta CsW, zomwe zimawonekeranso pachithunzi cha scanning electron microscope (SEM) (Chithunzi 3b; Chithunzi S9, chidziwitso chothandizira) .Komanso, izi ❖ kuyanika njira chimathandiza nanomaterials mlandu kuti finely kukulunga CHIKWANGWANI pamwamba, potero maximizing electrostatic PM kuchotsa mphamvu (Chithunzi S10, kuchirikiza zambiri).
Kuchita bwino kwa PM kuchotsa kwa ChM ndi ChN kunaphunziridwa (Chithunzi 3c).M2.0 ndi N2.5 zidakutidwa ndi CSW kupanga ChM2.0 ndi ChN2.5, motsatana.Kuchotsa kwa ChM2.0 kwa PM1.0, PM2.5 ndi PM10 kunali 70.1%, 78.8% ndi 86.3%, motsatana, pomwe zofananira za ChN2.5 zinali 77.0%, 87.7% ndi 94.6% motsatana.Kupaka kwa CsW kumathandizira kwambiri kuchotsa kwa M2.0 ndi N2.5, ndipo zotsatira zomwe zimawonedwa pa PM yaying'ono ndizofunika kwambiri.Makamaka, ma nanowhiskers a chitosan adawonjezera kuchotsera kwa M2.0's PM0.5 ndi PM1.0 ndi 15% ndi 13%, motero (Chithunzi S11, chidziwitso chothandizira).Ngakhale M2.0 ndizovuta kusiya PM1.0 yaying'ono chifukwa cha malo ake ochulukirapo a fibril (Chithunzi 2c), ChM2.0 adsorbs PM1.0 chifukwa ma cations ndi ma amides mu CsWs amadutsa mu ion-ion, kugwirizana kwa Pole-ion , ndi mgwirizano wa dipole-dipole ndi fumbi.Chifukwa cha zokutira zake za CSW, mphamvu yochotsa PM ya ChM2.0 ndi ChN2.5 ndiyokwera kwambiri kuposa M5.2 ndi N4.8 (Table S3, yothandizira zambiri).
Chosangalatsa ndichakuti, ngakhale kuti kutulutsa kwa PM kumakhala bwino kwambiri, zokutira za CSW sizimakhudza kutsika kwamphamvu.Kutsika kwamphamvu kwa ChM2.0 ndi ChN2.5 kunakula pang'ono mpaka 15 ndi 23 Pa, pafupifupi theka la kuwonjezeka komwe kunawonedwa kwa M5.2 ndi N4.8 (Chithunzi 3d; Table S3, chidziwitso chothandizira).Choncho, kuvala ndi zipangizo zochokera ku bio ndi njira yoyenera kukwaniritsa zofunikira za zosefera ziwiri zofunika;ndiye kuti, kugwiritsa ntchito bwino kwa PM ndi kusiyana kwa kuthamanga kwa mpweya, zomwe zimasiyana.Komabe, PM1.0 ndi PM2.5 kuchotsa bwino kwa ChM2.0 ndi ChN2.5 zonse ndizochepa kuposa 90%;mwachiwonekere, kachitidwe kameneka kakufunika kuwongolera.
Dongosolo lophatikizika losefera lomwe lili ndi nembanemba zingapo zosintha pang'onopang'ono ma fiber diameters ndi kukula kwa pore kumatha kuthetsa mavuto omwe ali pamwambawa [12].Chosefera chophatikizika cha mpweya chimakhala ndi zabwino za nanofibers ziwiri zosiyana ndi maukonde apamwamba kwambiri.Pachifukwa ichi, ChM ndi ChN zimangosungidwa kuti zipange zosefera zophatikizika (Int-MNs).Mwachitsanzo, Int-MN4.5 imakonzedwa pogwiritsa ntchito ChM2.0 ndi ChN2.5, ndipo machitidwe ake amafananizidwa ndi ChN4.8 ndi ChM5.2 omwe ali ndi ma aal densities ofanana (ie makulidwe).Mu kuyesa kokwanira kwa PM kuchotsa, mbali ya ultrafine fiber ya Int-MN4.5 idawululidwa mchipinda chafumbi chifukwa mbali ya ultrafine fiber inali yolimba kwambiri kutsekeka kuposa mbali ya nanofiber.Monga momwe tawonetsera pa Chithunzi 4a, Int-MN4.5 imasonyeza bwino kuchotsa kwa PM bwino ndi kusiyana kwapakati kusiyana ndi zosefera ziwiri za chigawo chimodzi, ndi kutsika kwa 37 Pa, komwe kuli kofanana ndi ChM5.2 ndi kutsika kwambiri kuposa ChM5.2 ChN4.8. Kuonjezera apo, PM1.0 kuchotsa bwino kwa Int-MN4.5 ndi 91% (Chithunzi 4b).Kumbali inayi, ChM5.2 sinawonetse kutulutsa kwakukulu kwa PM1.0 chifukwa ma pores ake ndi akulu kuposa a Int-MN4.5.
Nthawi yotumiza: Nov-03-2021
