Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Lisebelisoa tse Tsoetseng Pele le Boenjiniere ba Lik'hemik'hale, Univesithi ea Saense le Theknoloji (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Lisebelisoa tse Tsoetseng Pele le Boenjiniere ba Lik'hemik'hale, Univesithi ea Saense le Theknoloji (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Lisebelisoa tse Tsoetseng Pele le Boenjiniere ba Lik'hemik'hale, Univesithi ea Saense le Theknoloji (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Lisebelisoa tse Tsoetseng Pele le Boenjiniere ba Lik'hemik'hale, Univesithi ea Saense le Theknoloji (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Lisebelisoa tse Tsoetseng Pele le Boenjiniere ba Lik'hemik'hale, Univesithi ea Saense le Theknoloji (UST), Daejeon, 34113 Republic of Korea
Korea Institute of Chemical Technology (KRICT) Biobased Chemistry Research Center, Ulsan, 44429, Rephabliki ea Korea
Lisebelisoa tse Tsoetseng Pele le Boenjiniere ba Lik'hemik'hale, Univesithi ea Saense le Theknoloji (UST), Daejeon, 34113 Republic of Korea
Sebelisa sehokelo se ka tlase ho arolelana mongolo o felletseng oa sengoloa sena le metsoalle le basebetsi-'moho.ithute haholoanyane.
Ka lebaka la seoa sa coronavirus le litaba tse amanang le ntho e itseng (PM) moeeng, tlhoko ea limaske e eketsehile haholo.Leha ho le joalo, li-filters tse tloaelehileng tsa mask tse thehiloeng ho motlakase o tsitsitseng le nano sieve kaofela li ka lahloa, ha li senyehe kapa li ka sebelisoa hape, tse tla baka mathata a tebileng a litšila.Ho phaella moo, ea pele e tla lahleheloa ke mosebetsi tlas'a maemo a mongobo, athe ea morao-rao e tla sebetsa ka ho theoha ho hoholo ha khatello ea moea le ho koala ha pore ka potlako ho tla etsahala.Mona, filthara ea mask ea fiber e ka senyehang, e sa keneleng mongobo, e phefumolohang haholo, e sebetsang hantle haholo e entsoe.Ka bokhuts'oane, likhoele tse peli tsa biodegradable ultrafine le mete ea nanofiber li kenyelelitsoe sefang sa membrane ea Janus, ebe li apesoa ka li-nanowhiskers tsa chitosan tse nang le cationically charged chitosan.Setlhopha sena se sebetsa hantle joalo ka sesefe sa khoebo sa N95 mme se ka tlosa 98.3% ea 2.5 µm PM.Li-nanofibers li hlahisa likaroloana tse ntle tsa 'mele, le likhoele tsa ultrafine li fana ka phapang e tlase ea khatello ea 59 Pa, e loketseng phefumoloho ea motho.Ho fapana le ho fokotseha ho hoholo ha ts'ebetso ea li-filters tsa N95 tsa khoebo ha li pepesehetse mongobo, tahlehelo ea ts'ebetso ea filthara ena ha e na thuso, kahoo e ka sebelisoa ka makhetlo a mangata hobane dipole tse sa feleng tsa chitosan adsorbs ultrafine PM (mohlala, naetrojene).le sulfur oxides).Ho bohlokoa hore sefe ena e bole ka ho feletseng mobung o entsoeng ka moiteli nakong ea libeke tse 4.
Seoa sa hajoale se e-so ka se bonoa sa coronavirus (COVID-19) se tsamaisa tlhokahalo e kholo ea limaske.[1] Mokhatlo oa Lefatše oa Bophelo (WHO) o hakanya hore limaske tsa bongaka tse limilione tse 89 lia hlokahala khoeli le khoeli selemong sena.[1] Ha se feela hore litsebi tsa bophelo bo botle li hloka limaske tsa N95 tse sebetsang hantle, empa limaske tsa sepheo se akaretsang bakeng sa batho bohle le tsona li fetohile lisebelisoa tsa bohlokoa tsa letsatsi le letsatsi bakeng sa thibelo ea lefu lena le tšoaetsanoang la phefumoloho.[1] Ho feta moo, makala a amehang a khothaletsa ka matla tšebeliso ea limaske tse lahloang letsatsi le leng le le leng, [1] sena se lebisitse mathateng a tikoloho a amanang le litšila tse ngata tsa mask.
Kaha particulate matter (PM) hajoale e le bothata bo boholo ka ho fetisisa ba tšilafalo ea moea, limaske e fetohile mokhoa o sebetsang ka ho fetesisa o fumanehang ho batho ka bomong.PM e arotsoe ka PM2.5 le PM10 ho ea ka boholo ba karoloana (2.5 le 10μm ka ho latellana), e amang tikoloho ea tlhaho ka botebo [2] le boleng ba bophelo ba motho ka litsela tse sa tšoaneng.[2] Selemo se seng le se seng, PM e baka mafu a limilione tse 4.2 le kholofalo ea lilemo tse 103.1 tsa bophelo.[2] PM2.5 e beha tšokelo e kholo haholo bophelong bo botle 'me e khethiloe ka molao e le sehlopha sa I carcinogen.[2] Ka hona, ho nakong ebile ho bohlokoa ho etsa lipatlisiso le ho nts'etsapele sefahleho se sebetsang hantle sa mask mabapi le ho kenella ha moea le ho tlosoa ha PM.[3]
Ka kakaretso, li-filters tsa setso tsa fiber li tšoara PM ka mekhoa e 'meli e fapaneng: ka sieving e thehiloeng ho nanofibers le electrostatic adsorption e thehiloeng ho microfibers (Setšoantšo sa 1a).Tšebeliso ea li-filters tse thehiloeng ho nanofiber, haholo-holo li-electrospun nanofiber mats, li ipakile e le leano le sebetsang la ho tlosa PM, e leng phello ea ho fumaneha ha thepa e ngata le sebopeho sa sehlahisoa se laoloang.[3] The nanofiber mat e ka tlosa likaroloana tsa boholo ba sepheo, e bakoang ke phapang ea boholo pakeng tsa likaroloana le li-pores.[3] Leha ho le joalo, likhoele tsa nano-scale li hloka ho phutheloa ka bongata ho etsa li-pores tse nyane haholo, tse kotsi ho phefumoloha ha motho ka boiketlo ka lebaka la phapang e amanang le khatello e phahameng.Ho phaella moo, likoti tse nyenyane li tla thijoa ka potlako ka potlako.
Ka lehlakoreng le leng, meltblown ultra-fine fiber mat e qosoa ka electrostatically ke tšimo ea motlakase e matla haholo, 'me likaroloana tse nyenyane haholo li tšoaroa ke electrostatic adsorption.[4] E le mohlala oa moemeli, mochine oa ho phefumoloha oa N95 ke mochine o hloekisang sefahleho o hloekisang likaroloana o finyellang litlhoko tsa Setsi sa Sechaba sa Tšireletso le Bophelo bo Botle ba Mosebetsi hobane se ka sefa bonyane 95% ea likaroloana tse tsamaisoang ke moea.Mofuta ona oa sefe o monya ultrafine PM, eo hangata e entsoeng ka lintho tsa anionic tse kang SO42− le NO3-, ka ho hoheloa ke motlakase o matla.Leha ho le joalo, tefiso e tsitsitseng e holim'a fiber mat e qhaloa habonolo sebakeng se nang le mongobo, joalo ka ho fumanoa ho phefumoloha ha motho ho nang le mongobo, [4] ho fella ka ho fokotseha ha bokhoni ba adsorption.
E le ho tsoela pele ho ntlafatsa ts'ebetso ea ho hloekisa kapa ho rarolla khoebo pakeng tsa katleho ea ho tlosa le ho theoha ha khatello, li-filters tse thehiloeng ho nanofibers le li-microfibers li kopantsoe le lisebelisoa tse phahameng tsa k'habone tse kang lisebelisoa tsa carbon, metal organic frameworks, le PTFE nanoparticles.[4] Leha ho le joalo, chefo e sa tsitsang ea likokoana-hloko le ho qhalana ha li-additives tsena e ntse e le mathata a ke keng a qojoa.[4] Haholo-holo, mefuta ena e 'meli ea lihloela tsa setso hangata ha e senyehe, ka hona, qetellong li tla patoa libakeng tsa lithōle kapa ho chesoa ka mor'a hore li sebelisoe.Ka hona, nts'etsopele ea li-filters tse ntlafalitsoeng tsa mask ho rarolla mathata ana a litšila mme ka nako e ts'oanang ho hapa PM ka mokhoa o khotsofatsang le o matla ke tlhoko ea bohlokoa ea hajoale.
E le ho rarolla mathata a ka holimo, re entse "membrane filter" ea Janus e kopantsoeng le poly(butylene succinate)-based (PBS-based) [5] microfiber le nanofiber mats.Sesefa sa membrane ea Janus se tlositsoe ka litelu tsa chitosan nano (CsWs) [5] (Setšoantšo sa 1b).Joalo ka ha bohle re tseba, PBS ke moemeli oa polymer ea biodegradable, e ka hlahisang fiber ea ultrafine le nanofiber nonwovens ka electrospinning.Nano-scale fibers 'meleng e tšoasa PM, ha li-micro-scale nano-fibers li fokotsa ho theoha ha khatello le ho sebetsa e le moralo oa CsW.Chitosan ke thepa e thehiloeng ho bio e pakiloeng e na le thepa e ntle ea tlhaho, ho kenyelletsa le biocompatibility, biodegradability le chefo e batlang e le tlase, [5] e ka fokotsang matšoenyeho a amanang le ho hema ka phoso ha basebelisi.[5] Ho phaella moo, chitosan e na le libaka tsa cationic le lihlopha tsa polar amide.[5] Esita le tlas'a maemo a mongobo, e ka hohela likaroloana tsa polar ultrafine (joaloka SO42- le NO3-).
Mona, re tlaleha filthara ea mask e ka senyehang, e sebetsang hantle haholo, e sa keneleng mongobo le ea khatello e tlase e thehiloeng lisebelisoa tse fumanehang habonolo tse ka senyehang.Ka lebaka la motsoako oa 'mele oa sieving le electrostatic adsorption, filthara e kopantsoeng ea CSW-coated microfiber/nanofiber e na le ts'ebetso e phahameng ea ho tlosa PM2.5 (ho fihla ho 98%),' me ka nako e ts'oanang, khatello e phahameng e theoha holim'a sefe e teteaneng ka ho fetisisa. feela Ke 59 Pa, e loketseng phefumoloho ea motho.Ha ho bapisoa le ts'enyehelo e kholo ea ts'ebetso e bonts'itsoeng ke filthara ea khoebo ea N95, sefa sena se bonts'a tahlehelo e sa tsotelleng ea katleho ea ho tlosa PM (<1%) leha e le metsi ka botlalo, ka lebaka la tefiso e sa feleng ea CSW.Ho feta moo, li-filters tsa rona li khona ho senyeha ka ho feletseng mobung o entsoeng ka manyolo ka mor'a libeke tse 4.Ha ho bapisoa le lithuto tse ling tse nang le likhopolo tse tšoanang, tseo karolo ea filthara e entsoeng ka thepa e ka senyehang, kapa e bonts'a ts'ebetso e fokolang ho lisebelisoa tse sa tšoaneng tsa biopolymer, [6] sefa sena se bontša ka ho toba Biodegradability ea likarolo tse tsoetseng pele (filimi S1, boitsebiso bo tšehetsang).
E le karolo ea sefe ea lera la Janus, limmete tsa nanofiber le superfine fiber PBS li ile tsa lokisoa pele.Ka hona, 11% le 12% ea tharollo ea PBS e ne e le electrospun ho hlahisa likhoele tsa nanometer le micrometer, ka ho latellana, ka lebaka la phapang ea bona ea viscosity.[7] Lintlha tse qaqileng tsa litšobotsi tsa tharollo le maemo a nepahetseng a electrospinning li thathamisitsoe ho Table S1 le S2, boitsebisong bo tšehetsang.Kaha faeba ea as-spun e ntse e e-na le mokelikeli o setseng, bate e eketsehileng ea ho kopanya metsi e kenngoa mochine o tloaelehileng oa electrospinning, joalokaha ho bontšitsoe setšoantšong sa 2a.Ho phaella moo, metsi a ho hlapa a ka boela a sebelisa foreimi ho bokella lesela le hloekileng la PBS fiber mat, e fapaneng le matrix a tiileng sebakeng sa setso (Setšoantšo sa 2b).[7] Karolelano ea li-diameter tsa fiber ea microfiber le mats a nanofiber ke 2.25 le 0.51 µm, ka ho latellana, 'me li-diameter tse tloaelehileng tsa pore ke 13.1 le 3.5 µm, ka ho latellana (Setšoantšo sa 2c, d).Ha motsoako oa 9:1 oa chloroform/ethanol o fetoha mouoane ka potlako ka mor'a hore o lokolloe molomong, phapang ea viscosity pakeng tsa tharollo ea 11 le 12 wt% e eketseha ka potlako (Setšoantšo sa S1, boitsebiso bo tšehetsang).[7] Ka hona, phapang ea mahloriso ea 1 wt% feela e ka baka phetoho e kholo ka bophara ba fiber.
Pele o hlahloba ts'ebetso ea filthara (Figure S2, tlhahisoleseding e tšehetsang), e le ho bapisa li-filters tse fapa-fapaneng ka mokhoa o utloahalang, li-electrospun nonwovens tsa botenya bo tloaelehileng li ile tsa etsoa, hobane botenya ke ntho ea bohlokoa e amang phapang ea khatello le katleho ea filtration ea ts'ebetso ea filthara.Kaha li-nonwovens li bonolo ebile li na le masoba, ho thata ho tseba ka ho toba botenya ba li-electrospun nonwovens.Botenya ba lesela ka kakaretso bo lekana le boima ba bokaholimo (boima ka sebaka sa yuniti, boima ba motheo).Ka hona, thutong ena, re sebelisa boima ba motheo (gm-2) e le tekanyo e sebetsang ea botenya.[8] Botenya bo laoloa ka ho fetola nako ea electrospinning, joalokaha ho bontšoa ho Setšoantšo sa 2e.Ha nako ea ho ohla e ntse e eketseha ho tloha ho motsotso o le mong ho ea ho metsotso e 10, botenya ba microfiber mat bo eketseha ho 0.2, 2.0, 5.2, le 9.1 gm-2, ka ho latellana.Ka mokhoa o ts'oanang, botenya ba nanofiber mat bo ile ba eketseha ho 0.2, 1.0, 2.5, le 4.8 gm-2, ka ho latellana.Limmete tsa Microfiber le nanofiber li khethiloe ka boleng ba tsona ba botenya (gm-2) joalo ka: M0.2, M2.0, M5.2 le M9.1, le N0.2, N1.0, N2.5 le N4. 8.
Phapang ea khatello ea moea (ΔP) ea sampole eohle ke sesupo sa bohlokoa sa ts'ebetso ea filthara.[9] Ho phefumoloha ka sefe e nang le khatello e phahameng ea khatello ha ho monate ho mosebedisi.Ka tlhaho, hoa hlokomeloa hore ho theoha ha khatello ho eketseha ha botenya ba filthara bo ntse bo eketseha, joalokaha ho bontšoa ho Setšoantšo sa S3, boitsebiso bo tšehetsang.The nanofiber mat (N4.8) e bontša ho theoha ha khatello e phahameng ho feta microfiber (M5.2) mat ka botenya bo ka bapisoang hobane nanofiber mat e na le li-pores tse nyenyane.Ha moea o feta ka har'a sefa ka lebelo pakeng tsa 0.5 le 13.2 ms-1, ho theoha ha khatello ea mefuta e 'meli e fapaneng ea lihlopha ho eketseha butle-butle ho tloha 101 Pa ho ea ho 102 Pa. Botenya bo lokela ho ntlafatsoa ho leka-lekanya ho theoha ha khatello le ho tlosoa ha PM. bokgoni;lebelo la moea la 1.0 ms-1 lea utloahala hobane nako eo batho ba e nkang ho hema ka molomo ke hoo e ka bang 1.3 ms-1.[10] Tabeng ena, ho theoha ha khatello ea M5.2 le N4.8 ho amoheleha ka lebelo la moea la 1.0 ms-1 (tlase ho 50 Pa) (Setšoantšo sa S4, tlhahisoleseding e tšehetsang).Ka kopo elelloa hore ho theoha ha khatello ea N95 le limaske tse tšoanang tsa filthara ea Korea (KF94) ke 50 ho isa ho 70 Pa, ka ho latellana.Ts'ebetso e tsoelang pele ea CSW le ho kopanngoa ha filthara ea micro/nano ho ka eketsa ho hanyetsa moea;ka hona, e le ho fana ka tekanyo ea khatello ea khatello, re ile ra hlahloba N2.5 le M2.0 pele re hlahloba M5.2 le N4.8.
Sebakeng se lebeletsoeng sa lebelo la moea la 1.0 ms-1, katleho ea ho tlosa PM1.0, PM2.5, le PM10 ea PBS microfiber le mats nanofiber e ile ea ithutoa ntle le tefiso e tsitsitseng (Setšoantšo sa S5, boitsebiso bo tšehetsang).Hoa hlokomeloa hore katleho ea ho tlosa PM ka kakaretso e eketseha ka keketseho ea botenya le boholo ba PM.Ts'ebetso ea ho tlosa N2.5 e molemo ho feta M2.0 ka lebaka la li-pores tsa eona tse nyenyane.Matla a ho tlosa M2.0 bakeng sa PM1.0, PM2.5 le PM10 e ne e le 55.5%, 64.6% le 78.8%, ka ho latellana, ha boleng bo tšoanang ba N2.5 e ne e le 71.9%, 80.1% le 89.6% (Setšoantšo 2f).Re hlokometse hore phapang e kholo ka ho fetisisa ea katleho pakeng tsa M2.0 le N2.5 ke PM1.0, e bontšang hore sieving ea 'mele ea microfiber mesh e sebetsa hantle bakeng sa PM ea boemo ba micron, empa ha e sebetse ho nano-level PM (Figure S6, boitsebiso bo tšehetsang)., M2.0 le N2.5 ka bobeli li bonts'a bokhoni bo tlase ba ho hapa PM bo ka tlase ho 90%.Ho phaella moo, N2.5 e ka 'na ea hlaseloa habonolo ke lerōle ho feta M2.0, hobane likaroloana tsa lerōle li ka thibela habonolo li-pores tse nyenyane tsa N2.5.Ha ho se na tefiso ea static, sieving ea 'mele e lekanyelitsoe bokhoni ba eona ba ho finyella ho theoha ho hlokahalang ha khatello le katleho ea ho tlosa ka nako e le' ngoe ka lebaka la kamano ea khoebo pakeng tsa bona.
Electrostatic adsorption ke mokhoa o sebelisoang haholo ho hapa PM ka mokhoa o nepahetseng.[11] Ka kakaretso, tefiso e tsitsitseng e sebelisoa ka likhoka ho sefa se sa lohiloeng ka tšimo ea motlakase e matla;Leha ho le joalo, tefiso ena e tsitsitseng e senyeha habonolo tlas'a maemo a mongobo, e leng se bakang tahlehelo ea bokhoni ba ho hapa PM.[4] E le lintho tse bonahalang tse thehiloeng bakeng sa filtration electrostatic, re ile ra hlahisa 200 nm bolelele le 40 nm bophara CsW;ka lebaka la lihlopha tsa bona tsa ammonium le lihlopha tsa polar amide, li-nanowhisker tsena li na le litefiso tse sa feleng tsa cationic.Tefiso e ntle e fumanehang holim'a CsW e emeloa ke bokhoni ba eona ba zeta (ZP);CsW e hasane ka metsing ka pH ea 4.8, 'me ZP ea bona e fumanoa e le +49.8 mV (Setšoantšo sa S7, boitsebiso bo tšehetsang).
CsW-coated PBS microfibers (ChMs) le nanofibers (ChNs) li ile tsa lokisoa ka ho roala ha bonolo ka har'a 0.2 wt% CSW ea ho hasana ha metsi, e leng mokhoa o nepahetseng oa ho kopanya boholo ba CsWs holim'a likhoele tsa PBS, joalokaha ho bontšitsoe ho setšoantšo se bontšitsoeng Setšoantšong sa 3a le Setšoantšo sa S8, tlhahisoleseding e tšehetsang.Setšoantšo sa X-ray se nang le nitrogen energy dispersive X-ray spectroscopy (EDS) se bontša hore bokaholimo ba fiber ea PBS bo koahetsoe ka mokhoa o ts'oanang le likaroloana tsa CsW, tse bonahalang le setšoantšong sa electron microscope (SEM) ea setšoantšo (setšoantšo sa 3b; Setšoantšo sa S9, boitsebiso bo tšehetsang) .Ho phaella moo, sena Mokhoa ona oa ho roala o nolofalletsa li-nanomaterials tse qosoang ho phuthela hantle holim'a fiber, ka tsela eo ho eketsa bokhoni ba ho tlosa motlakase oa PM (Figure S10, boitsebiso bo tšehetsang).
Mosebetsi oa ho tlosa PM oa ChM le ChN o ile oa ithutoa (Setšoantšo sa 3c).M2.0 le N2.5 li ne li koahetsoe ka CSW ho hlahisa ChM2.0 le ChN2.5, ka ho latellana.Matla a ho tlosa ChM2.0 bakeng sa PM1.0, PM2.5 le PM10 e ne e le 70.1%, 78.8% le 86.3%, ka ho latellana, athe litekanyetso tse tšoanang tsa ChN2.5 e ne e le 77.0%, 87.7% le 94.6% ka ho latellana.Ho roala ha CsW ho ntlafatsa haholo ts'ebetso ea ho tlosa M2.0 le N2.5, 'me phello e hlokometsoeng bakeng sa PM e nyenyane haholo e bohlokoa haholo.Ka ho khetheha, li-nanowhiskers tsa chitosan li ekelitse katleho ea ho tlosoa ha M2.0's PM0.5 le PM1.0 ka 15% le 13%, ka ho latellana (Setšoantšo sa S11, boitsebiso bo tšehetsang).Le hoja M2.0 e thata ho kenyelletsa PM1.0 e nyenyane ka lebaka la sebaka sa eona se pharaletseng sa fibril (Setšoantšo sa 2c), ChM2.0 e adsorbs PM1.0 hobane li-cations le li-amides ho CsWs li feta ka ion-ion, li kopanya tšebelisano ea Pole-ion. , le ho sebelisana ha dipole-dipole le lerole.Ka lebaka la ho roala ha CSW, katleho ea ho tlosa PM ea ChM2.0 le ChN2.5 e phahame ho feta ea M5.2 le N4.8 e teteaneng (Letlapa la S3, boitsebiso bo tšehetsang).
Ho khahlisang ke hore, leha ts'ebetso ea ho tlosa PM e ntlafalitsoe haholo, ho roala ha CSW ha ho ame ho theoha ha khatello.Ho theoha ha khatello ea ChM2.0 le ChN2.5 ho eketsehile hanyenyane ho 15 le 23 Pa, hoo e batlang e le halofo ea keketseho e hlokometsoeng bakeng sa M5.2 le N4.8 (Setšoantšo sa 3d; Letlapa la S3, tlhahisoleseding e tšehetsang).Ka hona, ho roala ka lisebelisoa tsa bio-based ke mokhoa o loketseng oa ho finyella litlhoko tsa ts'ebetso ea lihlopha tse peli tsa motheo;ke hore, katleho ea ho tlosa PM le phapang ea khatello ea moea, e leng ntho e fapaneng.Leha ho le joalo, katleho ea ho tlosa PM1.0 le PM2.5 ea ChM2.0 le ChN2.5 ka bobeli li tlase ho 90%;ho hlakile hore ts'ebetso ena e hloka ho ntlafatsoa.
Sistimi e kopaneng ea filthara e entsoeng ka li-membrane tse ngata tse fetohang butle-butle li-diameter tsa fiber le boholo ba pore e ka rarolla mathata a ka holimo [12].Sefahla se kopaneng sa moea se na le melemo ea li-nanofiber tse peli tse fapaneng le marang-rang a superfine fiber.Tabeng ena, ChM le ChN li kenngoa feela ho hlahisa li-filters tse kopantsoeng (Int-MNs).Ka mohlala, Int-MN4.5 e lokiselitsoe ho sebelisoa ChM2.0 le ChN2.5, 'me tshebetso ea eona e bapisoa le ChN4.8 le ChM5.2 tse nang le li-areal densities tse tšoanang (ke hore botenya).Tekong ea katleho ea ho tlosa PM, karolo ea ultrafine fiber ea Int-MN4.5 e ile ea pepesoa ka kamoreng e lerōle hobane lehlakore la ultrafine fiber le ne le hanyetsa ho koala ho feta lehlakore la nanofiber.Joalokaha ho bontšitsoe setšoantšong sa 4a, Int-MN4.5 e bonts'a katleho e ntle ea ho tlosa PM le phapang ea khatello ho feta lihlopha tse peli tsa karolo e le 'ngoe, tse nang le khatello ea khatello ea 37 Pa, e tšoanang le ChM5.2 le e tlase haholo ho feta ChM5.2 ChN4.8. Ho phaella moo, katleho ea ho tlosa PM1.0 ea Int-MN4.5 ke 91% (Setšoantšo sa 4b).Ka lehlakoreng le leng, ChM5.2 ha ea ka ea bontša katleho e joalo ea ho tlosa PM1.0 hobane li-pores tsa eona li kholo ho feta tsa Int-MN4.5.
Nako ea poso: Nov-03-2021
