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Kajeno, masela a sebetsang a nang le thepa ea antibacteria a tumme haholo. Leha ho le joalo, tlhahiso e theko e tlaase ea masela a sebetsang a nang le ts'ebetso e tšoarellang le e tsitsitseng e ntse e le phephetso. Polyvinyl alcohol (PVA) e ne e sebelisetsoa ho fetola polypropylene (PP) nonwoven lesela, 'me joale li-nanoparticles tsa silevera (AgNPs) li ne li kenngoa sebakeng sa ho hlahisa PVA-modified AgNPs-loaded PP (e bitsoang AgNPs). /PVA/PP) lesela. Ho koaheloa ha likhoele tsa PP ho sebelisa ho roala ha PVA ho thusa ho ntlafatsa haholo ho khomarela ha Ag NPs tse jereng ho li-fibers tsa PP, 'me li-nonwovens tsa Ag / PVA / PP li bonts'a thepa ea mechine e ntlafetseng haholo le ho hanyetsa Escherichia coli (e bitsoang E. coli). Ka kakaretso, lesela la Ag/PVA/PP le entsoeng ka 30mM silevera ea ammonia le na le thepa e ntle ea mochini, mme sekhahla sa ts'ireletso ea antibacteria khahlanong le E. coli se fihla ho 99.99%. Lesela le ntse le boloka ts'ebetso e ntle ea antibacteria ka mor'a ho hlatsoa ha 40 mme le na le monyetla oa ho sebelisoa khafetsa. Ntle le moo, lesela le sa lohiloeng la Ag/PVA/PP le na le menyetla e mengata ea ts'ebeliso indastering ka lebaka la ho kenella ha lona hantle moeeng le ho kenella ha mongobo. Ho feta moo, re boetse re thehile theknoloji ea roll-to-roll mme ra etsa lipatlisiso tsa selelekela ho leka ho khonahala ha mokhoa ona.
Ka ho teba ha ho hola ha moruo oa lefats'e, metsamao e meholo ea baahi e ekelitse haholo monyetla oa phetiso ea vaerase, e hlalosang hantle hore na hobaneng coronavirus e ncha e na le bokhoni bo matla ba ho hasana lefats'eng ka bophara mme ho thata ho thibela1,2,3. Ka kutloisiso ena, ho na le tlhokahalo e potlakileng ea ho hlahisa lisebelisoa tse ncha tsa antibacterial, tse kang polypropylene (PP) nonwovens, e le lisebelisoa tsa tšireletso ea bongaka. Lesela la polypropylene le sa lohiloeng le na le melemo ea ho fokotseha ho fokolang, ho se sebetse ha lik'hemik'hale le theko e tlaase4, empa ha e na matla a antibacterial, bophelo bo khutšoanyane ba tšebeletso le ts'ireletso e tlaase ea tšireletso. Ka hona, ho bohlokoa haholo ho fana ka thepa ea antibacterial ho thepa e sa loheng ea PP.
Joaloka moemeli oa khale oa antibacteria, silevera e fetile mekhahlelo e mehlano ea tsoelo-pele: tharollo ea silevera ea colloidal, silver sulfadiazine, letsoai la silevera, silevera ea protheine le nanosilver. Li-nanoparticles tsa silevera li ntse li sebelisoa ka ho eketsehileng masimong a kang meriana5,6, conductivity7,8,9, Raman e ntlafalitsoeng ka holim'a metsi10,11,12, tšenyo e senyang ea dyes13,14,15,16 joalo-joalo. ho hanyetsa ha bona baktheria, botsitso, litšenyehelo tse tlaase le ho amoheloa ha tikoloho17,18,19. Ho phaella moo, li-nanoparticles tsa silevera tse nang le sebaka se seholo se khethehileng sa holim'a metsi le ts'ebetso e phahameng ea antibacterial li ka kopanngoa le masela a boea20, masela a k'hothone21,22, masela a polyester le masela a mang ho finyella tokollo e laoloang, e tsitsitseng ea likaroloana tsa silevera tsa antibacteria23,24. Sena se bolela hore ka ho kenyelletsa li-AgNP, hoa khoneha ho theha masela a PP a nang le ts'ebetso ea antibacterial. Leha ho le joalo, li-nonwovens tsa PP ha li na lihlopha tse sebetsang 'me li na le polarity e tlaase, e sa thuseng ho kenngoa ha AgNPs. Ho hlola tšitiso ena, bafuputsi ba bang ba lekile ho beha li-nanoparticles tsa Ag holim'a masela a PP ba sebelisa mekhoa e fapaneng ea ho fetola ho kenyelletsa ho fafatsa ka plasma26,27, radiation grafting28,29,30,31 le top coating32. Ka mohlala, Goli et al. [33] e hlahisitse lesela la protheine holim'a lesela la PP le sa lohiloeng, li-amino acid tse karolong e ka thōko ea protheine lera li ka sebetsa e le lintlha tsa ankora bakeng sa ho tlama ha AgNP, kahoo ho finyella thepa e ntle ea antibacterial. mosebetsi. Li le basebetsi-'moho 34 ba fumane hore N-isopropylacrylamide le N-(3-aminopropyl) methacrylamide hydrochloride e kopantsoeng ke ultraviolet (UV) etching e bontšitse mosebetsi o matla oa antimicrobial, le hoja ts'ebetso ea UV etching e rarahane ebile e ka senya thepa ea mochine. likhoele. . Oliani et al o lokiselitse lifilimi tsa gel tsa Ag NPs-PP tse nang le ts'ebetso e ntle ea antibacterial ka ho lokisa PP e hloekileng pele ka mahlaseli a gamma; leha ho le joalo, mokhoa oa bona le oona o ne o rarahane. Ka hona, e ntse e le phephetso ho hlahisa li-nonwovens tsa polypropylene tse ka sebelisoang hape ka mokhoa o lakatsehang oa antimicrobial.
Thutong ena, joala ba polyvinyl, thepa ea membrane e nang le botsoalle ba tikoloho le e theko e tlaase e nang le bokhoni bo botle ba ho etsa filimi, hydrophilicity e phahameng, le botsitso bo botle ba 'mele le lik'hemik'hale, e sebelisetsoa ho fetola masela a polypropylene. Glucose e sebelisoa e le ntho e fokotsang36. Keketseho ea matla a holim'a metsi a PP e fetotsoeng e khothalletsa ho khethoa ha AgNPs. Ha ho bapisoa le lesela le hloekileng la PP, lesela le lokisitsoeng la Ag / PVA / PP le ile la bontša ho sebelisoa hantle, ts'ebetso e ntle ea antibacterial khahlanong le E. coli, thepa e ntle ea mochine esita le ka mor'a ho hlatsoa ha 40, le ho phefumoloha ho hoholo, thobalano le mongobo.
Lesela la PP le sa lohiloeng le nang le matla a itseng a khoheli a 25 g/m2 le botenya ba 0.18 mm le fanoe ke Jiyuan Kang'an Sanitary Materials Co., Ltd. (Jiyuan, China) mme le khaotsoe ka maqephe a 5 × 5 cm2. Silver nitrate (99.8%; AR) e rekiloe ho Xilong Scientific Co., Ltd. (Shantou, China). Glucose e ile ea rekoa ho tsoa Fuzhou Neptune Fuyao Pharmaceutical Co., Ltd. (Fuzhou, China). Polyvinyl alcohol (sehlahisoa sa boemo ba indasteri) se rekiloe ho tsoa ho Tianjin Sitong Chemical Factory (Tianjin, China). Metsi a hloekisitsoeng a ne a sebelisoa e le solvent kapa rinse 'me a ne a lokisoa laboratoring ea rona. Agar ea limatlafatsi le moro li ile tsa rekoa Beijing Aoboxing Biotechnology Co., Ltd. (Beijing, China). E. coli strain (ATCC 25922) e rekiloe ho Khamphani ea Zhangzhou Bochuang (Zhangzhou, Chaena).
Sehlahisoa sa PP se hlahisitsoeng se ile sa hlatsuoa ka ultrasound ka ethanol ka metsotso e 15. PVA e hlahisoang e ile ea kenngoa metsing 'me ea futhumatsoa ka 95 ° C bakeng sa lihora tsa 2 ho fumana tharollo ea metsi. Joale tsoekere e ile ea qhibiliha ka 10 ml ea tharollo ea PVA ka karoloana e boima ea 0.1%, 0.5%, 1.0% le 1.5%. Lesela le hloekisitsoeng la polypropylene nonwoven le ile la qoelisoa ka har'a motsoako oa PVA/glucose mme le futhumatsoa ka 60 ° C bakeng sa hora e le 'ngoe. Ka mor'a hore ho futhumatsa ho phethoe, lesela le sa lohiloeng la PP le kenngoeng ka PP le ntšoa motsoako oa PVA / glucose mme le omisoa ka 60 ° C bakeng sa 0.5 h ho etsa filimi ea PVA holim'a marang-rang, kahoo ho fumana motsoako oa PVA / PP. textile.
Silver nitrate e qhibiliha ka 10 ml ea metsi ka ho tsitsisa kamehla mocheso oa kamore 'me ammonia e eketsoa ka tsela e fokolang ho fihlela tharollo e fetoha ho tloha ho hlakileng ho ea ho sootho le ho hlaka hape ho fumana tharollo ea silevera ea ammonia (5-90 mm). Beha PVA / PP lesela le sa lohiloeng ka tharollo ea ammonia ea silevera 'me ue chese ka 60 ° C bakeng sa hora ea 1 ho etsa Ag nanoparticles in situ holim'a lesela, ebe oe hlatsoa ka metsi ka makhetlo a mararo ebe o omisa ka 60 ° C. C bakeng sa 0.5 h ho fumana lesela la motsoako oa Ag/PVA/PP.
Ka mor'a liteko tsa pele, re ile ra haha lisebelisoa tsa roll-to-roll ka laboratoring bakeng sa tlhahiso e kholo ea masela a kopantsoeng. Lirolara li entsoe ka PTFE ho qoba liketso tse mpe le tšilafalo. Nakong ea ts'ebetso ena, nako ea ho inregnation le palo ea tharollo ea adsorbed e ka laoloa ka ho fetola lebelo la li-roller le sebaka se pakeng tsa li-roller ho fumana lesela la motsoako oa Ag / PVA / PP le lakatsehang.
The tissue surface morphology e ile ea ithutoa ho sebelisoa VEGA3 scanning electron microscope (SEM; Japan Electronics, Japan) ka motlakase o potlakileng oa 5 kV. Sebopeho sa kristale sa nanoparticles ea silevera se ile sa hlahlojoa ke X-ray diffraction (XRD; Bruker, D8 Advanced, Jeremane; Cu Kα radiation, λ = 0.15418 nm; voltage: 40 kV, hona joale: 40 mA) sebakeng sa 10-80 °. 2θ. Fourier transform infrared spectrometer (ATR-FTIR; Nicolet 170sx, Thermo Fisher Scientific Incorporation) e ile ea sebelisoa ho sekaseka litšobotsi tsa lik'hemik'hale tsa lesela la polypropylene le fetotsoeng holim'a metsi. Likahare tsa PVA tse fetotsoeng tsa masela a kopantsoeng a Ag/PVA/PP li lekantsoe ka tlhahlobo ea thermogravimetric (TGA; Mettler Toledo, Switzerland) tlas'a molapo oa naetrojene. plasma mass spectrometry (ICP-MS, ELAN DRC II, Perkin-Elmer (Hong Kong) Co., Ltd.) e ile ea sebelisoa ho fumana hore na masela a kopantsoeng a Ag/PVA/PP ke silevera.
Sekhahla sa phetisetso ea moea le mouoane oa metsi oa lesela le kopaneng la Ag/PVA/PP (litlhaloso: 78×50cm2) li ile tsa lekanyetsoa ke mokhatlo oa boraro oa tlhahlobo (Tianfangbiao Standardization Certification and Testing Co., Ltd.) ho latela GB/T. 5453-1997 le GB/T 12704.2-2009. Bakeng sa sampole ka 'ngoe, lintlha tse leshome tse fapaneng li khethoa bakeng sa tlhahlobo, 'me lintlha tse fanoeng ke setsi ke karolelano ea lintlha tse leshome.
Mosebetsi oa antibacterial oa lesela la motsoako oa Ag / PVA / PP o ile oa lekanyetsoa ho latela litekanyetso tsa Sechaena GB / T 20944.1-2007 le GB / T 20944.3- ho sebelisa mokhoa oa ho jala lipoleiti tsa agar (tlhahlobo ea boleng) le mokhoa oa ho sisinya flask (tlhahlobo ea bongata). . ka ho latellana ho 2008. Ts'ebetso ea antibacterial ea lesela la motsoako oa Ag / PVA / PP khahlanong le Escherichia coli e ne e khethoa ka linako tse fapaneng tsa ho hlatsoa. Bakeng sa mokhoa oa ho jala poleiti ea agar, lesela la motsoako oa Ag / PVA / PP le phunyeletsoa ka har'a disk (bophara: 8 mm) ho sebelisa punch le ho khomarela sejana sa agar Petri se kenngoeng ka Escherichia coli (ATCC 25922). ; 3.4 × 108 CFU ml-1) ebe e kenngoa ho 37°C le 56% mongobo o lekanyelitsoeng ka lihora tse ka bang 24. Sebaka sa thibelo se ile sa hlahlojoa ka holimo ho tloha bohareng ba disk ho ea ho selikalikoe se ka hare sa likolone tse potolohileng. Ho sebelisoa mokhoa oa shake flask, poleiti e sephara ea 2 × 2 cm2 e ile ea lokisoa ho tloha lesela le entsoeng ka Ag / PVA / PP le lekiloeng 'me le kenngoa sebakeng sa moro ho 121 ° C le 0.1 MPa bakeng sa metsotso ea 30. Ka mor'a autoclaving, sampole e ile ea qoelisoa ka botlolo ea 5-mL Erlenmeyer e nang le 70 mL ea tharollo ea setso sa moro (suspension concentration 1 × 105-4 × 105 CFU / mL) ebe e kenngoa ka mocheso oscillating oa 150 ° C. rpm le 25 ° C bakeng sa lihora tse 18. Ka mor'a ho sisinyeha, bokella palo e itseng ea ho emisoa ha baktheria 'me u e hlapolle ka makhetlo a leshome. Bokella palo e hlokahalang ea ho fanyeha ha baktheria e hlapolotsoeng, e hasane holim'a agar medium le setso ho 37 ° C le 56% ea mongobo o amanang le lihora tse 24. Mokhoa oa ho bala katleho ea antibacteria ke: \(\frac{\mathrm{C}-\mathrm{A}}{\mathrm{C}}\cdot 100\%\), moo C le A e leng palo ea likolone ka mor'a lihora tse 24, ka ho latellana. E lengoa ka sehlopha sa taolo le lithane tse kopaneng tsa Ag/PVA/PP.
Ho tšoarella ha masela a kopantsoeng a Ag/PVA/PP ho ile ha hlahlojoa ka ho hlatsuoa ho latela ISO 105-C10:2006.1A. Nakong ea ho hlatsoa, qoelisa teko ea Ag / PVA / PP lesela la motsoako (30x40mm2) ka tharollo ea metsi e nang le sesepa sa khoebo (5.0g / L) 'me ue hlatsoe ka 40±2 rpm le 40±5 rpm / min. lebelo le phahameng. °C 10, 20, 30, 40 le 50 lipotoloho. Ka mor'a ho hlatsoa, lesela le hlatsuoa ka makhetlo a mararo ka metsi 'me le omisitsoe ka mocheso oa 50-60 ° C ka metsotso e 30. Phetoho ea litaba tsa silevera ka mor'a ho hlatsoa e ile ea lekanyetsoa ho fumana tekanyo ea mosebetsi oa antibacterial.
Setšoantšo sa 1 se bontša setšoantšo sa moralo oa ho etsoa ha lesela la motsoako oa Ag / PVA / PP. Ka mantsoe a mang, thepa ea PP e sa lohang e qoelisoa ka har'a tharollo e tsoakiloeng ea PVA le tsoekere. Thepa e sa lohiloeng ea PP e kentsoeng e omisitsoe ho lokisa mofetoleli le moemeli oa ho fokotsa ho etsa lera le tiisang. Lesela le omisitsoeng la polypropylene nonwoven le qoelisoa ka har'a tharollo ea silevera ea ammonia ho kenya li-nanoparticles tsa silevera sebakeng sa situ. Khatello ea mofetoleli, tekanyo ea molar ea tsoekere ho ammonia ea silevera, bongata ba ammonia ea silevera le mocheso oa karabelo li ama pula ea Ag NPs. ke lintlha tsa bohlokoa. Setšoantšo sa 2a se bonts'a ho itšetleha ha sekhahla sa ho kopana le metsi sa lesela la Ag / PVA / PP holim'a khatello ea mofetoleli. Ha motsoako oa modifier o eketseha ho tloha ho 0.5 wt.% ho ea ho 1.0 wt.%, lehlakoreng la ho kopana le lesela la Ag / PVA / PP le fokotseha haholo; ha khatello ea maikutlo e eketseha ho tloha ho 1.0 wt.% ho ea ho 2.0 wt.%, ha e fetohe. Setšoantšo sa 2 b se bontša litšoantšo tsa SEM tsa likhoele tse hloekileng tsa PP le masela a Ag / PVA / PP a lokiselitsoeng ka 50 mm silver ammonia concentration le likarolo tse fapaneng tsa molar tsa tsoekere ho ammonia ea silevera (1: 1, 3: 1, 5: 1, le 9: 1). . setšoantšo. ). Fiber ea PP e hlahisoang e batla e le boreleli. Ka mor'a ho kenngoa ka filimi ea PVA, likhoele tse ling li kopantsoe hammoho; Ka lebaka la ho beoa ha li-nanoparticles tsa silevera, likhoele li batla li le thata. Ha tekanyo ea molar ea ntho e fokotsang ho tsoekere e eketseha, karolo e behiloeng ea Ag NPs butle-butle e ntse e teteaneng, 'me ha tekanyo ea molar e eketseha ho 5: 1 le 9: 1, Ag NPs e atisa ho theha lihlopha. Litšoantšo tsa macroscopic le microscopic tsa fiber ea PP li fetoha tse ts'oanang haholoanyane, haholo ha tekanyo ea molar ea ho fokotsa tsoekere e le 5: 1. Litšoantšo tsa dijithale tsa lisampole tse tsamaellanang tse fumanoeng ho 50 mM silver ammonia li bonts'oa ho Setšoantšo sa S1.
Liphetoho ka lehlakoreng la ho kopana le metsi la lesela la Ag / PVA / PP ka likarolo tse fapaneng tsa PVA (a), litšoantšo tsa SEM tsa lesela la Ag / PVA / PP tse fumanoang ka bongata ba silevera ea ammonia ea 50 mM le likarolo tse sa tšoaneng tsa molar tsa tsoekere le silevera ea ammonia [(b))); (1) PP fiber, (2) PVA / PP fiber, (3) molar ratio 1: 1, (4) molar ratio 3: 1, (5) molar ratio 5: 1, (6) molar ratio 9: 1], X-ray diffraction pattern (c) le SEM setšoantšo (d) ea Ag / PVA / PP lesela le fumanoang ka silevera (0 M) ammonia (1M) 2 m, 5 m, 5 m) (3) 30 mM, (4) 50 mM , (5) 90 mM le (6) Ag/PP-30 mM. Mocheso oa ho arabela ke 60°C.
Setšoantšong sa 2c se bontša mokhoa oa ho fapana ha X-ray oa lesela le hlahang la Ag/PVA/PP. Ho phaella tlhōrōng ea diffraction ea PP fiber 37, litlhōrō tse 'nè tsa diffraction ho 2θ = ~ ~ 37.8 °, 44.2 °, 64.1 ° le 77.3 ° li lumellana le (1 1 1), (2 0 0), (2 2 0), sefofane sa Crystal (3 cubic silver face 1 1). Ha khatello ea ammonia ea silevera e eketseha ho tloha ho 5 ho isa ho 90 mM, mekhoa ea XRD ea Ag e ba matla haholoanyane, e tsamaellanang le keketseho e latelang ea kristale. Ho latela mokhoa oa Scherrer, boholo ba lijo-thollo tsa Ag nanoparticles tse lokiselitsoeng ka 10 mM, 30 mM le 50 mM silver ammonia li ne li baloa e le 21.3 nm, 23.3 nm le 26.5 nm, ka ho latellana. Lebaka ke hobane khatello ea silevera ea ammonia ke eona e susumetsang karabelo ea phokotso ho theha silevera ea tšepe. Ka khatello e ntseng e eketseha ea ammonia ea silevera, sekhahla sa nucleation le kholo ea Ag NPs lia eketseha. Setšoantšo sa 2d se bonts'a litšoantšo tsa SEM tsa masela a Ag/PVA/PP a fumanoeng libakeng tse fapaneng tsa Ag ammonia. Ka har'a pokello ea ammonia ea silevera ea 30 mm, karolo e behiloeng ea Ag NPs e batla e tšoana. Leha ho le joalo, ha motsoako oa silevera oa ammonia o phahame haholo, ho tšoana ha lera la deposition la Ag NP ho batla ho fokotseha, e leng se ka 'nang sa bakoa ke ho kopana ho matla ho Ag NP deposition layer. Ho phaella moo, li-nanoparticles tsa silevera tse holim'a metsi li na le libopeho tse peli: spherical le scaly. Boholo ba karoloana e chitja e ka ba 20-80 nm, 'me boholo ba lamellar lateral bo ka ba 100-300 nm (Setšoantšo sa S2). Sekhahla sa li-nanoparticles tsa Ag holim'a lesela le sa fetoloang la PP ha se lekane. Ho phaella moo, ho eketsa mocheso ho khothalletsa phokotso ea Ag NPs (sa feiga.
Setšoantšo sa 3a se bonts'a ka mokhoa o hlophisitsoeng kamano pakeng tsa khatello ea ammonia ea silevera, chelete ea silevera e behiloeng, le mosebetsi oa antibacterial oa lesela le lokisitsoeng la Ag / PVA / PP. Setšoantšo sa 3b se bontša mekhoa ea antibacterial ea lisampole ka mekhahlelo e fapaneng ea ammonia ea silevera, e ka bontšang ka ho toba boemo ba antibacterial ba lisampole. Ha khatello ea ammonia ea silevera e eketseha ho tloha ho 5 mm ho ea ho 90 mm, palo ea pula ea silevera e ile ea eketseha ho tloha ho 13.67 g/kg ho ea ho 481.81 g/kg. Ho phaella moo, ha palo ea lichelete tsa silevera e ntse e eketseha, mosebetsi oa antibacterial khahlanong le E. coli qalong oa eketseha ebe o lula o le boemong bo phahameng. Haholo-holo, ha silevera ea ammonia e le 30 mM, chelete ea silevera ka lesela le hlahang la Ag/PVA/PP ke 67.62 g/kg, 'me sekhahla sa antibacteria ke 99.99%. 'me u khethe sampole ena e le moemeli bakeng sa sebopeho se latelang sa sebopeho.
(a) Kamano lipakeng tsa boemo ba ts'ebetso ea antibacteria le palo ea Ag layer e sebelisitsoeng le bongata ba ammonia ea silevera; (b) Litšoantšo tsa lipoleiti tsa baktheria tse nkiloeng ka khamera ea digital tse bontšang lisampole tse se nang letho le lisampole tse lokiselitsoeng ho sebelisoa 5 mM, 10 mM, 30 mM, 50 mM le 90 mM silver ammonia. Mosebetsi oa antibacterial oa lesela la Ag / PVA / PP khahlanong le Escherichia coli
Setšoantšo sa 4a se bontša ponahalo ea FTIR/ATR ea PP, PVA/PP, Ag/PP le Ag/PVA/PP. Lihlopha tsa ho monya tsa fiber e hloekileng ea PP ho 2950 cm-1 le 2916 cm-1 li bakoa ke ho sisinyeha ha asymmetric ho otlolla ha lihlopha tsa -CH3 le -CH2-, 'me ho 2867 cm-1 le 2837 cm-1 li bakoa ke ho sisinyeha ha symmetric stretching of -CH3 le -CH2. –CH3 le –CH2–. Lihlopha tsa ho monya ho 1375 cm–1 le 1456 cm–1 li hlahisoa ke ho sisinyeha ha asymmetric le symmetric shift of –CH338.39. Mofuta oa FTIR oa fiber ea Ag/PP o tšoana le oa fiber ea PP. Ntle le sehlopha sa ho monya sa PP, tlhōrō e ncha ea ho monya ho 3360 cm-1 ea masela a PVA / PP le Ag / PVA / PP e bakoa ke ho otlolloa ha hydrogen bond ea sehlopha sa -OH. Sena se bontša hore PVA e sebelisoa ka katleho holim'a fiber ea polypropylene. Ho phaella moo, tlhōrō ea hydroxyl absorption ea lesela la Ag / PVA / PP e fokola hanyenyane ho feta ea lesela la PVA / PP, e ka 'nang ea bakoa ke ho hokahanya ha lihlopha tse ling tsa hydroxyl tse nang le silevera.
FT-IR spectrum (a), TGA curve (b) le XPS metha spectrum (c) ea PP e hloekileng, lesela la PVA/PP le lesela la Ag/PVA/PP, le C 1s spectrum ea PP e hloekileng (d), PVA/PP PP lesela (e) le Ag 3d tlhoro (f) ea lesela la Ag/PVA/PP.
Setšoantšong sa 4c se bontša ponahalo ea XPS ea masela a PP, PVA / PP, le Ag / PVA / PP. Letšoao le fokolang la O 1s la fiber e hloekileng ea polypropylene le ka hlahisoa ke karolo ea oksijene e bapalitsoeng holim'a metsi; tlhōrō ea C 1s ho 284.6 eV e amahanngoa le CH le CC (sheba setšoantšo sa 4d). Ha ho bapisoa le fiber e hloekileng ea PP, lesela la PVA / PP (setšoantšo sa 4e) se bontša ts'ebetso e phahameng ho 284.6 eV (C-C / C-H), 285.6 eV (C-O-H), 284.6 eV (C-C / C-H), 285.6 eV (C-O-H) le 288-C eO (H) = 288-5. Ho phaella moo, lesela la O 1s la PVA / PP le ka lekanyetsoa ke litlhōrō tse peli ho 532.3 eV le 533.2 eV41 (Fig. S4), litlhōrō tsena tsa C 1s li lumellana le C-OH le H-C = O (lihlopha tsa hydroxyl tsa PVA le aldehyde glucose sehlopha), e lumellanang le data ea FTIR. Lesela la Ag / PVA / PP le sa lohang le boloka lesela la O 1s la C-OH (532.3 eV) le HC = O (533.2 eV) (Figure S5), e nang le 65.81% (liphesente tsa atomic) C, 22. 89. % O le 11.31% Sg. Ka ho khetheha, litlhōrō tsa Ag 3d5 / 2 le Ag 3d3 / 2 ho 368.2 eV le 374.2 eV (Fig. 4f) li paka ka ho eketsehileng hore Ag NPs li doped holim'a lesela la PVA / PP42 le sa lohiloeng.
Li-curve tsa TGA (setšoantšo sa 4b) sa PP e hloekileng, lesela la Ag / PP, le lesela la Ag / PVA / PP le bontša hore li na le mekhoa e tšoanang ea ho senyeha ha mocheso, 'me ho behoa ha Ag NP ho lebisa ho eketseha ho fokolang ha mocheso oa mocheso oa PP. likhoele PVA/PP likhoele (ho tloha 480 ° C (PP fibers) ho ea 495 ° C), mohlomong ka lebaka la ho thehoa ha Ag barrier43. Ka nako e ts'oanang, lipalo tse setseng tsa sampuli tse hloekileng tsa PP, Ag / PP, Ag / PVA / PP, Ag / PVA / PP-W50 le Ag / PP-W50 ka mor'a ho futhumatsa ka 800 ° C e ne e le 1.32%, 16.26% le 13. 86%. % ka ho latellana 9.88% le 2.12% (sehlongoana sa W50 mona se bua ka lipotoloho tse 50 tsa ho hlatsoa). Karolo e setseng ea PP e hloekileng e bakoa ke litšila, 'me karolo e setseng ea lisampole tse setseng ho Ag NPs,' me phapang ea palo e setseng ea lisampole tse jereng silevera e lokela ho ba ka lebaka la mefuta e fapaneng ea li-nanoparticles tsa silevera tse laetsoeng ho tsona. Ho phaella moo, ka mor'a ho hlatsoa lesela la Ag / PP ka makhetlo a 50, lihlahisoa tsa silevera tse setseng li fokotsehile ka 94.65%, 'me karolo e setseng ea silevera ea lesela la Ag / PVA / PP e fokotsehile hoo e ka bang 31.74%. Sena se bontša hore PVA encapsulating coating e ka ntlafatsa ka katleho ho khomarela ha AgNP ho matrix a PP.
Ho lekola ho roala boiketlo, ho kenella ha moea le sekhahla sa phetisetso ea mouoane oa metsi oa lesela le lokisitsoeng la polypropylene li ile tsa lekanyetsoa. Ka kakaretso, ho phefumoloha ho amana le boiketlo ba mosebedisi, haholo-holo libakeng tse chesang le tse mongobo44. Joalokaha ho bontšitsoe setšoantšong sa 5a, moea o kenang ka PP o hloekileng ke 2050 mm / s, 'me ka mor'a ho fetoloa ha PVA e fokotseha ho 856 mm / s. Sena ke hobane filimi ea PVA e entsoeng ka holim'a fiber ea PP le karolo e lohiloeng e thusa ho fokotsa likheo pakeng tsa likhoele. Kamora ho sebelisa li-Ag NPs, ho kenella ha moea hoa lesela la PP hoa eketseha ka lebaka la tšebeliso ea koae ea PVA ha u sebelisa Ag NPs. Ntle le moo, phefumoloho ea masela a Ag/PVA/PP e batla e fokotseha ha khatello ea ammonia ea silevera e eketseha ho tloha ho 10 ho isa ho 50 mmol. Sena se kanna sa bakoa ke taba ea hore botenya ba depositi ea silevera bo eketseha ka bongata bo ntseng bo eketseha ba silevera ea ammonia, e thusang ho fokotsa palo ea li-pores le monyetla oa hore mouoane oa metsi o fete ho tsona.
(a) Ho kenella ha moea ka masela a Ag / PVA / PP a lokiselitsoeng ka mefuta e fapaneng ea ammonia ea silevera; (b) Phetiso ea mouoane oa metsi a masela a Ag/PVA/PP a lokiselitsoeng ka mefuta e fapaneng ea ammonia ea silevera; (c) Li-modifiers tse fapaneng Tensile curve ea Ag Fabric/PVA/PP e fumanoeng maemong a fapaneng; (d) Lesela le tsitsitseng la lesela la Ag / PVA / PP le fumanoang ka mefuta e fapaneng ea ammonia ea silevera (lesela la Ag / PVA / PP le fumanoang ka 30 mM silevera ea ammonia le boetse le bontšoa) (Bapisa likhahla tse tsitsitseng tsa masela a PP ka mor'a ho hlatsoa lipotoloho tse 40).
Sekhahla sa phetisetso ea mouoane oa metsi ke pontšo e 'ngoe ea bohlokoa ea boiketlo ba mocheso oa lesela45. Hoa etsahala hore ho phunyeha ha mongobo oa masela ho susumetsoa haholo ke ho phefumoloha le thepa ea holim'a metsi. Ke hore, ho kenella ha moea haholo-holo ho itšetlehile ka palo ea li-pores; thepa e ka holim'a metsi e ama ho kenella ha mongobo oa lihlopha tsa hydrophilic ka adsorption-diffusion-desorption ea limolek'hule tsa metsi. Joalokaha ho bontšitsoe Setšoantšong sa 5b, ho kenella ha mongobo oa fiber e hloekileng ea PP ke 4810 g / (m2 · 24h). Ka mor'a ho tiisoa ka ho roala ha PVA, palo ea likoti ho fiber ea PP e fokotseha, empa mongobo oa mongobo oa lesela la PVA / PP o eketseha ho 5070 g / (m2 · 24 h), kaha mongobo oa eona oa mongobo o khethoa haholo-holo ke thepa ea holim'a metsi. eseng li-pores. Kamora ho beoa ha li-AgNP, ho kenella ha mongobo oa lesela la Ag/PVA/PP ho ile ha eketseha. Haholo-holo, mocheso o phahameng oa mongobo oa lesela la Ag / PVA / PP le fumanoang sebakeng sa silevera sa ammonia sa 30 mM ke 10300 g / (m2 · 24h). Ka nako e ts'oanang, ho kenella ha mongobo ho fapaneng ha masela a Ag / PVA / PP a fumanoang libakeng tse fapaneng tsa ammonia ea silevera e ka amahanngoa le phapang pakeng tsa botenya ba lesela la ho beha silevera le palo ea li-pores tsa eona.
Thepa ea mochini ea masela e ama bophelo ba bona ba ts'ebeletso haholo, haholo e le lisebelisoa tse ka sebelisoang hape46. Setšoantšo sa 5c se bonts'a sekhahla sa khatello ea maikutlo sa lesela la Ag/PVA/PP. Matla a thata a PP a hloekileng ke 2.23 MPa feela, ha matla a 1 wt% a PVA / PP a eketseha haholo ho 4.56 MPa, e leng se bontšang hore ho kenngoa ha lesela la PVA PP ho thusa ho ntlafatsa haholo thepa ea eona ea mechine. thepa. Matla a tsitsitseng le bolelele nakong ea khefu ea lesela la PVA / PP li eketseha ka khatello e ntseng e eketseha ea PVA modifier hobane filimi ea PVA e ka senya khatello ea kelello le ho matlafatsa fiber ea PP. Leha ho le joalo, ha motsoako oa mofetoleli o nyolohela ho 1.5 wt.%, PVA e khomarelang e etsa hore lesela la polypropylene le be thata, e leng ho amang ho apara boiketlo.
Ha ho bapisoa le masela a hloekileng a PP le PVA / PP, matla a tsitsipano le bolelele nakong ea khefu ea masela a Ag / PVA / PP a ntlafatsoa le ho feta hobane Ag nanoparticles e ajoang ka mokhoa o ts'oanang holim'a likhoele tsa PP li ka tsamaisa mojaro47,48. Ho ka bonoa hore matla a matla a Ag / PP fiber a phahame ho feta a PP a hloekileng, a fihla ho 3.36 MPa (setšoantšo sa 5d), se tiisang phello e matla le e matlafatsang ea Ag NPs. Haholo-holo, lesela la Ag / PVA / PP le hlahisoang ka bongata ba silevera ea ammonia ea 30 mM (ho e-na le 50 mM) le bonts'a matla a maholo le ho lelefatsa nakong ea khefu, e ntseng e le ka lebaka la ho behoa ha junifomo ea Ag NPs hammoho le ho behoa ha junifomo. Aggregation ea silevera NPs tlas'a maemo a phahameng khatello ea ammonia silevera. Ho phaella moo, ka mor'a lipotoloho tse 40 tsa ho hlatsoa, matla a matla le ho lelefatsa ha khefu ea lesela la Ag / PVA / PP le lokiselitsoeng ho 30 mM ea ammonia ea silevera ea ammonia e fokotsehile ka 32.7% le 26.8%, ka ho latellana (setšoantšo sa 5d), se ka 'nang sa amahanngoa le tahlehelo e nyenyane ea nanoparticles ea silevera e behiloeng ka mor'a sena.
Lipalo 6a le b li bonts'a lifoto tsa khamera ea dijithale tsa lesela la Ag / PVA / PP le lesela la Ag / PP kamora ho hlatsoa lipotoloho tsa 0, 10, 20, 30, 40, le 50 ho 30 mM silver ammonia concentration. Lesela le lefifi la Ag / PVA / PP le lesela la Ag / PP butle-butle le fetoha bohlooho bo bobebe ka mor'a ho hlatsoa; 'me phetoho ea' mala oa pele nakong ea ho hlatsoa ha e bonahale eka e tebile joaloka ea bobeli. Ho phaella moo, ha ho bapisoa le lesela la Ag / PP, lihlahisoa tsa silevera tsa lesela la Ag / PVA / PP li fokotsehile butle ka mor'a ho hlatsoa; ka mor'a ho hlatsoa makhetlo a 20 kapa ho feta, ea pele e ile ea boloka lintho tse ngata tsa silevera ho feta tse qetellang (setšoantšo sa 6c). Sena se bontša hore ho kenya likhoele tsa PP tse nang le koae ea PVA ho ka ntlafatsa haholo ho khomarela ha Ag NP ho likhoele tsa PP. Setšoantšo sa 6d se bontša litšoantšo tsa SEM tsa lesela la Ag / PVA / PP le lesela la Ag / PP ka mor'a ho hlatsoa 10, 40, le 50 cycles. Masela a Ag / PVA / PP a na le tahlehelo e fokolang ea Ag NPs nakong ea ho hlatsoa ho feta masela a Ag / PP, hape hobane PVA encapsulating coating e thusa ho ntlafatsa ho khomarela ha Ag NPs ho PP fibers.
(a) Litšoantšo tsa lesela la Ag / PP le nkiloeng ka k'hamera ea digital (e nkiloeng 30 mM silver ammonia concentration) ka mor'a ho hlatsoa bakeng sa 0, 10, 20, 30, 40 le 50 cycles (1-6); (b) Ag / PVA / PP Litšoantšo tsa masela a nkiloeng ka k'hamera ea digital (e nkiloeng ho 30 mM silver ammonia concentration) ka mor'a ho hlatsoa bakeng sa 0, 10, 20, 30, 40 le 50 cycles (1-6); (c) Liphetoho tsa boleng ba silevera ba masela a mabeli ho pholletsa le li-wash cycles; (d) Litšoantšo tsa SEM tsa lesela la Ag / PVA / PP (1-3) le lesela la Ag / PP (4-6) ka mor'a ho hlatsoa ha 10, 40 le 50.
Setšoantšo sa 7 se bontša ts'ebetso ea antibacterial le lifoto tsa lik'hamera tsa digital tsa masela a Ag / PVA / PP khahlanong le E. coli ka mor'a 10, 20, 30 le 40 ho hlatsoa lipotoloho. Kamora ho hlatsoa ha 10 le 20, ts'ebetso ea antibacterial ea masela a Ag / PVA / PP e ile ea lula ho 99.99% le 99.93%, e bonts'a ts'ebetso e ntle ea antibacterial. Tekanyo ea antibacterial ea lesela la Ag / PVA / PP e fokotsehile hanyenyane ka mor'a makhetlo a 30 le a 40 a ho hlatsoa, e leng ka lebaka la tahlehelo ea AgNP ka mor'a ho hlatsoa nako e telele. Leha ho le joalo, tekanyo ea antibacterial ea lesela la Ag / PP ka mor'a ho hlatsoa ha 40 ke 80.16% feela. Ho totobetse hore phello ea antibacterial ea lesela la Ag / PP ka mor'a lipotoloho tse 40 tsa ho hlatsoa li tlase haholo ho feta tsa lesela la Ag / PVA / PP.
(a) Boemo ba tšebetso ea antibacterial khahlanong le E. coli. (b) Ho bapisa, litšoantšo tsa lesela la Ag / PVA / PP tse nkiloeng ka k'hamera ea digital ka mor'a ho hlatsoa lesela la Ag / PP ka 30 mM silver ammonia concentration bakeng sa 10, 20, 30, 40 le 40 cycles le tsona li bontšoa.
Setšoantšong sa 8 se bontša ka mokhoa o hlophisitsoeng ho etsoa ha lesela le leholo la Ag/PVA/PP le sebelisang tsela ea mekhahlelo e 'meli. Ke hore, tharollo ea PVA / glucose e ne e kolobisitsoe ka foreimi ea moqolo ka nako e itseng, ebe e ntšoa, ebe e kenngoa ka tharollo ea silevera ea ammonia ka mokhoa o ts'oanang ho fumana lesela la Ag / PVA / PP. (Setšoantšo sa 8a). Lesela le hlahisitsoeng la Ag/PVA/PP le ntse le boloka ts'ebetso e ntle ea antibacterial le haeba e siiloe selemo se le seng. Bakeng sa tokiso e kholo ea masela a Ag / PVA / PP, li-nonwovens tsa PP tse hlahisitsoeng li ile tsa kenngoa ka mokhoa o tsoelang pele oa ho roala ebe o fetela tharollo ea PVA / glucose le tharollo ea ammonia ea silevera ka tatellano le ho sebetsoa. mekhoa e 'meli. Lifitio tse khomaretsoeng. Nako ea ho inregnation e laoloa ka ho fetola lebelo la rolara, 'me palo ea tharollo ea adsorbed e laoloa ka ho fetola sebaka se pakeng tsa li-roller (setšoantšo sa 8b), ka tsela eo ho fumana sepheo sa Ag / PVA / PP lesela la nonwoven la boholo bo boholo (50 cm × 80 cm). ) le rolara ea pokello. Ts'ebetso eohle e bonolo ebile e sebetsa hantle, e leng se loketseng tlhahiso e kholo.
Setšoantšo sa moralo oa tlhahiso ea lihlahisoa tsa boholo bo boholo tse lebisitsoeng (a) le setšoantšo sa moralo oa ts'ebetso ea moqolo bakeng sa tlhahiso ea lisebelisoa tse sa loheng tsa Ag/PVA/PP (b).
Li-nonwovens tse nang le silevera tsa PVA/PP li hlahisoa ho sebelisoa theknoloji e bonolo ea in-situ liquid phase e kopantsoeng le tsela ea roll-to-roll. Ha ho bapisoa le lesela la PP le lesela la PVA / PP, thepa ea mochine ea lesela le sa lohiloeng la Ag / PVA / PP e ntlafalitsoe haholo hobane lesela la ho tiisa PVA le ka ntlafatsa haholo ho khomarela ha Ag NPs ho likhoele tsa PP. Ho phaella moo, palo ea PVA ea ho laela le likahare tsa li-NP tsa silevera ka lesela la Ag/PVA/PP le sa lohiloeng li ka laoloa hantle ka ho lokisa likhakanyo tsa tharollo ea PVA / glucose le tharollo ea silevera ea ammonia. Haholo-holo, Ag/PVA/PP nonwoven lesela le lokiselitsoeng ho sebelisa 30 mM silver ammonia solution e bontšitse thepa e ntle ka ho fetisisa ea mochini le ho boloka ts'ebetso e ntle ea antibacterial khahlano le E. coli esita le ka mor'a lipotoloho tse 40 tsa ho hlatsoa, ho bonts'a bokhoni bo botle ba ho thibela litšila. PP thepa e sa lohiloeng. Ha ho bapisoa le boitsebiso bo bong ba lingoliloeng, masela ao re a fumaneng ka mekhoa e bonolo a ne a bontša hore a hana ho hlatsuoa hamolemo. Ntle le moo, lesela la Ag / PVA / PP le sa tsoakoang le na le mokhoa o nepahetseng oa ho kenella ha mongobo le ho roala boiketlo, bo ka thusang ts'ebeliso ea lona lits'ebetsong tsa indasteri.
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Nako ea poso: Nov-26-2023