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Taa, akwa na-arụ ọrụ nke nwere ihe ndị na-egbu nje na-ewu ewu karị. Otú ọ dị, mmepụta akwa na-arụ ọrụ nke ọma na-arụ ọrụ nke ọma na-anọgide na-abụ ihe ịma aka. A na-eji Polyvinyl mmanya (PVA) gbanwee akwa polypropylene (PP) na-abụghị nke a na-etinye, wee tinye ọlaọcha nanoparticles (AgNPs) na ebe iji mepụta PVA-gbanwetụrụ AgNPs PP (nke a na-akpọ AgNPs). /PVA/PP) akwa. Encapsulation nke PP emep uta eri iji PVA mkpuchi na-enyere aka imeziwanye adhesion nke loaded Ag NPs na PP emep uta eri, na Ag/PVA/PP nonwovens na-egosipụta budata mma n'ibu Njirimara na iguzogide Escherichia coli (na-ezo aka dị ka E. coli). N'ozuzu, ag / PVA / PP nonwoven ákwà emepụtara na 30mM ọlaọcha amonia ịta ahụhụ nwere mma n'ibu Njirimara, na antibacterial nchebe ọnụego megide E. coli ruru 99.99%. Akwa ahụ ka na-ejigide ọrụ nje antibacterial dị mma mgbe ịsachara 40 ma nwee ike iji ya mee ihe ugboro ugboro. Na mgbakwunye, Ag / PVA / PP akwa na-abụghị kpara nwere atụmanya ngwa ngwa na ụlọ ọrụ n'ihi ịdị mma ikuku ya na mmiri permeability. Na mgbakwunye, anyị ewepụtala teknụzụ mpịakọta na-eme nyocha nke mbido iji nwalee ohere nke usoro a.
Site na mmụba nke ijikọ ụwa ọnụ akụ na ụba, mmegharị ọnụ ọgụgụ buru ibu abawanyela ohere nke mbufe nje, nke na-akọwa nke ọma ihe kpatara coronavirus akwụkwọ akụkọ nwere ikike siri ike ịgbasa gburugburu ụwa ma sie ike igbochi1,2,3. N'echiche a, ọ dị mkpa ngwa ngwa ịmepụta ihe ọhụrụ antibacterial, dị ka polypropylene (PP) nonwovens, dị ka ihe nchebe ahụike. Polypropylene ákwà na-abụghị nke a kpara akpa nwere uru nke njupụta dị ala, kemịkalụ kemịkalụ na ọnụ ala dị ala4, ma enweghị ikike antibacterial, ndụ ọrụ dị mkpirikpi na nchebe dị ala. Ya mere, ọ dị oke mkpa ịnye ihe ndị na-egbu egbu na ihe ndị na-abụghị PP.
Dị ka onye na-ahụ maka nje bacteria oge ochie, ọlaọcha agafewo usoro ise nke mmepe: colloidal silver solution, silver sulfadiazine, nnu ọlaọcha, ọlaọcha protein na nanosilver. Silver nanoparticles na-esiwanye eji na ubi ndị dị otú ahụ dị ka medicine5,6, conductivity7,8,9, elu-akwalite Raman agbasasị10,11,12, catalytic mmebi nke dyes13,14,15,16 wdg akpan akpan, silver nanoparticles ( AgNPs) nwere uru n'elu omenala antimicrobial mmadụ na metal compounds dị ka metal compounds. triclosan n'ihi nguzogide nje ha chọrọ, nkwụsi ike, ọnụ ala dị ala na nnabata gburugburu ebe obibi17,18,19. Na mgbakwunye, ọlaọcha nanoparticles na nnukwu kpọmkwem n'elu ebe na elu antibacterial ọrụ nwere ike itinye na ajị akwa20, owu fabrics21,22, polyester akwa na ndị ọzọ akwa iji nweta akara, nọgidere ntọhapụ nke antibacterial ọlaọcha irighiri23,24. Nke a pụtara na site n'itinye AgNPs, ọ ga-ekwe omume ịmepụta akwa PP na ọrụ antibacterial. Otú ọ dị, PP nonwovens enweghị otu ndị na-arụ ọrụ ma nwee obere polarity, nke na-adịghị mma na encapsulation nke AgNP. Iji merie a drawback, ụfọdụ na-eme nnyocha gbalịrị itinye Ag nanoparticles n'elu nke PP ákwà iji dị iche iche mgbanwe ụzọ gụnyere plasma spraying26,27, radieshon grafting28,29,30,31 na elu cover32. Dịka ọmụmaatụ, Goli et al. [33] webatara mkpuchi protein n'elu akwa PP na-abụghị nke a na-akpa, amino acids dị na mpụta nke oyi akwa protein nwere ike ije ozi dị ka ihe arịlịka maka njikọ nke AgNP, si otú ahụ nweta ezigbo ihe na-egbu nje. ọrụ. Li na ndị ọrụ 34 chọpụtara na N-isopropylacrylamide na N- (3-aminopropyl) methacrylamide hydrochloride jikọtara ya na ultraviolet (UV) etching gosipụtara ọrụ antimicrobial siri ike, ọ bụ ezie na usoro etching UV dị mgbagwoju anya ma nwee ike imebi ihe eji arụ ọrụ. eriri . . Oliani et al kwadebere ihe nkiri Gel Ag NPs-PP nwere ọrụ antibacterial dị mma site na-emezi PP dị ọcha na irradiation gamma; Otú ọ dị, usoro ha dịkwa mgbagwoju anya. Ya mere, ọ ka bụ ihe ịma aka iji rụpụta nke ọma na n'ụzọ dị mfe imepụta polypropylene nonwovens nwere ọrụ antimicrobial chọrọ.
N'ime ọmụmụ ihe a, a na-eji polyvinyl mmanya, ihe mkpuchi gburugburu ebe obibi na nke dị ọnụ ala nke nwere ike ịmepụta ihe nkiri dị mma, nnukwu hydrophilicity, na nkwụsi ike nke anụ ahụ na kemịkal dị mma, iji gbanwee akwa polypropylene. A na-eji glucose dị ka ihe na-ebelata 36. Mmụba nke ike elu nke PP gbanwetụrụ na-akwalite ntinye nhọrọ nke AgNP. N'iji ya tụnyere akwa PP dị ọcha, akwa Ag / PVA / PP a kwadebere na-egosi ezigbo recyclability, ezigbo antibacterial ọrụ megide E. coli, ezigbo ígwè ọrụ ọbụna mgbe 40 ịsa cycles, na ịrịba breathability, mmekọahụ na mmiri permeability.
The PP nonwoven ákwà na a kpọmkwem ike ndọda nke 25 g / m2 na a ọkpụrụkpụ nke 0.18 mm e nyere Jiyuan Kang'an Sanitary Materials Co., Ltd. (Jiyuan, China) na bee n'ime Ibé akwụkwọ tụrụ 5 × 5 cm2. Azụtara nitrate ọla ọcha (99.8%; AR) n'aka Xilong Scientific Co., Ltd. (Shantou, China). A zụtara glucose n'aka Fuzhou Neptune Fuyao Pharmaceutical Co., Ltd. (Fuzhou, China). A zụtara mmanya na-aba n'anya polyvinyl (reagent ọkwa ụlọ ọrụ) na Tianjin Sitong Chemical Factory (Tianjin, China). A na-eji mmiri deionized mee ihe dị ka ihe mgbaze ma ọ bụ kpochaa ma kwadebere ya na ụlọ nyocha anyị. A zụtara agar na broth na-edozi ahụ n'aka Beijing Aoboxing Biotechnology Co., Ltd. (Beijing, China). E. coli strain (ATCC 25922) zụtara na Zhangzhou Bochuang Company (Zhangzhou, China).
A na-eji ultrasound sachaa anụ ahụ PP nke sitere na ethanol maka nkeji iri na ise. A na-agbakwunye PVA nke na-esi na ya pụta na mmiri ma kpoo ọkụ na 95 Celsius maka awa 2 iji nweta ngwọta mmiri. Mgbe ahụ, a gbazere glucose n'ime 10 ml nke ngwọta PVA na oke nha nke 0.1%, 0.5%, 1.0% na 1.5%. A na-emikpu akwa polypropylene a na-adịghị akwa ákwà n'ime ngwọta PVA/glucose wee kpoo ọkụ na 60 ° C maka otu awa. Mgbe emechara ikpo ọkụ, a na-ewepụ ihe ndị na-adịghị edozi PP na ngwọta PVA/glucose ma kpoo ya na 60 ° C maka 0.5 h iji mepụta ihe nkiri PVA n'elu weebụ, si otú ahụ nweta ihe mejupụtara PVA / PP. textile.
A na-agbaze nitrate ọlaọcha na 10 ml mmiri na-akpali akpali mgbe niile na ụlọ okpomọkụ na amonia na-agbakwunye dropwise ruo mgbe ngwọta gbanwere site na nke doro anya na agba aja aja ma doo anya ọzọ iji nweta ngwọta amonia ọlaọcha (5-90 mM). Tinye akwa PVA/PP na-enweghị akwa na ngwọta amonia ọlaọcha ma kpoo ya na 60 ° C maka awa 1 iji mepụta Ag nanoparticles na ebe dị n'elu akwa ahụ, wee kpochaa ya na mmiri ugboro atọ wee kpoo na 60 ° C. C maka 0.5 h iji nweta ihe mejupụtara Ag / PVA / PP.
Mgbe nnwale nke mbụ gasịrị, anyị wuru akụrụngwa mpịakọta na-atụgharị n'ime ụlọ nyocha maka imepụta nnukwu akwa akwa. A na-eme rollers nke PTFE iji zere mmeghachi omume ọjọọ na mmetọ. N'oge usoro a, enwere ike ịchịkwa oge impregnation na ọnụ ọgụgụ nke ngwọta adsorbed site n'ịgbanwe ọsọ nke rollers na anya dị n'etiti rollers iji nweta ihe Ag / PVA / PP na-eme ka ọ bụrụ ihe a chọrọ.
A mụrụ morphology elu anụ ahụ site na iji VEGA3 nyocha eletrọnịkị (SEM; Japan Electronics, Japan) na voltaji na-agba ọsọ nke 5 kV. A na-enyocha usoro kristal nke nanoparticles ọlaọcha site na X-ray diffraction (XRD; Bruker, D8 Advanced, Germany; Cu Kα radieshon, λ = 0.15418 nm; voltaji: 40 kV, ugbu a: 40 mA) na nso nke 10-80 °. 2θ. A na-eji Fourier transform infrared spectrometer (ATR-FTIR; Nicolet 170sx, Thermo Fisher Scientific Incorporation) nyochaa njirimara kemịkalụ nke akwa polypropylene emezigharịrị elu. A tụrụ ihe ngbanwe PVA nke ihe mejupụtara akwa Ag/PVA/PP site na nyocha thermogravimetric (TGA; Mettler Toledo, Switzerland) n'okpuru iyi nitrogen. Ejikọtara ọnụ na plasma mass spectrometry (ICP-MS, ELAN DRC II, Perkin-Elmer (Hong Kong) Co., Ltd.) iji chọpụta ọdịnaya ọlaọcha nke Ag/PVA/PP akwa mejupụtara.
The ikuku permeability na mmiri vapor nnyefe ọnụego nke Ag / PVA / PP mejupụtara ákwà (nkọwa: 78 × 50cm2) tụrụ site a ọzọ ule gị n'ụlọnga (Tianfangbiao Standardization Asambodo na Testing Co., Ltd.) dị ka GB / T. 5453-1997 na GB/T 12704.2-2009. Maka nlele ọ bụla, a na-ahọrọ isi ihe iri dị iche iche maka ule, na data nke ụlọ ọrụ nyere bụ nkezi nke isi iri.
A tụrụ ọrụ antibacterial nke Ag / PVA / PP ihe mejupụtara akwa dị ka ụkpụrụ China si dị GB/T 20944.1-2007 na GB/T 20944.3- na-eji usoro mgbasa ozi agar (nyocha qualitative) na ịma jijiji usoro flask (nyocha nyocha). . n'otu n'otu na 2008. A na-ekpebi ọrụ antibacterial nke Ag / PVA / PP na-emepụta ákwà megide Escherichia coli n'oge dị iche iche ịsacha. Maka usoro mgbasa ozi nke agar, a na-atụba akwa akwa Ag/PVA/PP n'ime diski (dayameta: 8 mm) na-eji ntụmadị ma tinye ya na efere agar Petri nke Escherichia coli (ATCC 25922). ; 3.4 × 108 CFU ml-1) wee tinye ya na 37°C na iru mmiri 56% maka ihe dịka awa 24. A na-enyocha mpaghara mgbochi nke ọma site na etiti diski ahụ ruo n'ime ime nke ndị gbara ya gburugburu. N'iji usoro flask shake, a kwadebere efere dị larịị 2 × 2 cm2 site na akwa ngwakọta Ag/PVA/PP a nwalere ma tinye ya na ebe a na-esi nri na 121 ° C na 0.1 MPa maka nkeji 30. Mgbe autoclaving gasịrị, a na-emikpu ihe nlele ahụ n'ime 5-mL Erlenmeyer flask nwere 70 mL nke ngwọta omenala broth (nkwụsịtụ 1 × 105-4 × 105 CFU / mL) wee tinye ya na okpomọkụ na-ekpo ọkụ nke 150 ° C. rpm na 25 Celsius C maka awa 18. Mgbe ị masịrị, na-anakọta ụfọdụ nkwusioru nje ma gbanye ya okpukpu iri. Chịkọta ego achọrọ nke nkwusioru nje gbazere, gbasaa ya na agar media na 37 Celsius C yana iru mmiri 56% maka awa 24. Usoro maka ịgbakọ irè nje nje bụ: \(\frac{\mathrm{C}-\mathrm{A}}{\mathrm{C}}\cdot 100\%\), ebe C na A bụ ọnụ ọgụgụ nke obodo mgbe awa 24 gachara, n'otu n'otu. Azụlitere na njikwa na anụ ahụ mejupụtara Ag/PVA/PP.
A tụlere ịdịte aka nke akwa ihe mejupụtara Ag/PVA/PP site na ịsacha dịka ISO 105-C10:2006.1A. N'oge ịsa ahụ, mikpuo ule Ag / PVA / PP composite fabric (30x40mm2) n'ime mmiri mmiri nke nwere ncha azụmahịa (5.0g / L) ma saa ya na 40 ± 2 rpm na 40 ± 5 rpm / min. oke ọsọ. Celsius C 10, 20, 30, 40 na 50 okirikiri. Mgbe ịsachara, a na-asacha ákwà ahụ ugboro atọ na mmiri wee kpoo ya na okpomọkụ nke 50-60 ° C maka nkeji 30. A tụrụ mgbanwe nke ọdịnaya ọlaọcha mgbe ịsachara ahụ iji chọpụta ogo ọrụ antibacterial.
Ọnụọgụ 1 na-egosi eserese schematic nke imepụta akwa nke Ag/PVA/PP mejupụtara. Ya bụ, a na-emikpu ihe ndị na-abụghị nke PP n'ime ngwakọta ngwakọta nke PVA na glucose. A na-akpọnwụ PP-impregnated ihe na-abụghị nke a kpara akpa iji dozie onye na-agbanwe ihe na mbenata ụlọ ọrụ iji mepụta akwa mkpuchi. A na-emikpu akwa polypropylene akpọnwụghị n'ime ihe ngwọta amonia ọlaọcha iji tinye nanoparticles ọlaọcha na ọnọdụ. Nleta nke modifier, molar ratio nke glucose na ọlaọcha amonia, ịta nke ọlaọcha amonia na mmeghachi omume okpomọkụ na-emetụta ọdịda nke Ag NPs. bụ ihe ndị dị mkpa. Ọgụgụ 2a na-egosi ndabere nke akụkụ kọntaktị mmiri nke akwa Ag / PVA / PP na ntinye mgbanwe. Mgbe itinye uche na-agbanwe agbanwe na-abawanye site na 0.5 wt.% ruo 1.0 wt.%, akụkụ kọntaktị nke ákwà Ag / PVA / PP na-ebelata nke ọma; mgbe ntinye uche modifier na-abawanye site na 1.0 wt.% ruo 2.0 wt.%, ọ fọrọ nke nta ka ọ ghara ịgbanwe. Ọnụọgụ 2 b na-egosi ihe oyiyi SEM nke eriri PP dị ọcha na akwa Ag / PVA / PP nke a kwadebere na 50 mM ọlaọcha amonia ntinye uche na ọkwa dị iche iche nke glucose na amonia ọlaọcha (1: 1, 3: 1, 5: 1, na 9: 1). . onyonyo. ). Ihe PP fiber pụta dịtụ ire ụtọ. Mgbe encapsulation na ihe nkiri PVA, a na-ejikọta ụfọdụ eriri; N'ihi ntinye nke nanoparticles ọlaọcha, eriri ndị ahụ na-aghọ ihe siri ike. Ka molar ratio nke ndị na-ebelata ihe na-eme ka glucose na-abawanye, akwa oyi akwa nke Ag NP na-eji nwayọọ nwayọọ na-arị elu, na ka molar ratio na-abawanye na 5: 1 na 9: 1, Ag NPs na-etolite mkpokọta. Ihe onyonyo macroscopic na microscopic nke PP fiber na-aghọwanye otu, ọkachasị mgbe oke molar nke ibelata ihe nnọchi anya glucose bụ 5: 1. E gosipụtara foto dijitalụ nke ihe atụ kwekọrọ na amonia ọlaọcha 50 mM na eserese S1.
Mgbanwe n'akụkụ kọntaktị mmiri nke Ag / PVA / PP ákwà na iche iche PVA (a), ihe oyiyi SEM nke Ag / PVA / PP ákwà nwetara na ọlaọcha amonia nke 50 mM na ọnụ ọgụgụ dị iche iche nke glucose na ọlaọcha amonia [(b))); (1) PP eriri, (2) PVA / PP eriri, (3) molar ratio 1: 1, (4) molar ratio 3: 1, (5) molar ratio 5: 1, (6) molar ratio 9: 1], X-ray diffraction ụkpụrụ (c) na SEM image (d) nke Ag / PVA / PP ákwà nwetara na ọlaọcha ammonia: (10M) 5 m (10M) na ọlaọcha (3 m) 30 mm, (4) 50 mm, (5) 90 mm na (6) Ag/PP-30 mM. Okpomọkụ mmeghachi omume bụ 60 Celsius.
Na Fig. Onyonyo 2c na-egosi X-ray diffraction ụkpụrụ nke na-akpata Ag/PVA/PP ákwà. Na mgbakwunye na diffraction ọnụ ọgụgụ kasị elu nke PP fiber 37, anọ diffraction ọnụ ọgụgụ na 2θ = ~ 37.8 °, 44.2 °, 64.1 ° na 77.3 ° kwekọrọ (1 1 1), (2 0 0), (2 2 0), Crystal ụgbọelu (3 1-part) nke cued ihu silver. Dika ntinye amonia ọlaọcha na-abawanye site na 5 ruo 90 mM, usoro XRD nke Ag na-adị nkọ karị, na-adabere na mmụba na-esote na crystallinity. Dị ka usoro Scherrer si kwuo, a gbakọrọ nha ọka nke Ag nanoparticles nke a kwadebere na 10 mM, 30 mM na 50 mM ọlaọcha amonia ka ọ bụrụ 21.3 nm, 23.3 nm na 26.5 nm, n'otu n'otu. Nke a bụ n'ihi na mkpokọta amonia ọlaọcha bụ ihe na-akpata mbelata mmeghachi omume na-etolite ọlaọcha dara. N'ịba ụba nke amonia ọlaọcha, ọnụego nucleation na uto nke Ag NP na-abawanye. Ihe onyonyo 2d na-egosi onyonyo SEM nke akwa Ag/PVA/PP enwetara na ntinye dị iche iche nke Ag amonia. Na mkpokọta amonia ọlaọcha nke 30 mM, akwa akwa akwa nke Ag NP bụ ihe jikọrọ ọnụ. Otú ọ dị, mgbe mkpokọta amonia ọlaọcha dị oke elu, ịdị n'otu nke oghere nkwụnye ego Ag NP na-achọ ibelata, nke nwere ike ịbụ n'ihi agglomeration siri ike na oghere nkwụnye ego Ag NP. Tụkwasị na nke ahụ, nanoparticles ọlaọcha n'elu nwere ọdịdị abụọ: okirikiri na scaly. Ogo urughuru okirikiri bụ ihe dịka 20–80 nm, na nha mpụta lamellar bụ ihe dịka 100-300 nm (Ọnyocha S2). The deposition oyi akwa nke Ag nanoparticles n'elu nke unmodified PP ákwà bụ enweghị isi. Tụkwasị na nke ahụ, ịba ụba okpomọkụ na-akwalite mbelata Ag NP (Fig S3), ma oke mmeghachi omume okpomọkụ adịghị akwalite oke mmiri ozuzo nke Ag NP.
Ọgụgụ 3a na-egosipụta n'ụzọ doro anya mmekọrịta dị n'etiti mkpokọta amonia ọlaọcha, ego ọlaọcha a na-edebe, na ọrụ antibacterial nke akwa Ag/PVA/PP a kwadebere. Onyonyo 3b na-egosi usoro nje bacteria nke ihe atụ na nha dị iche iche nke amonia ọlaọcha, nke nwere ike igosi kpọmkwem ọnọdụ antibacterial nke ihe nlele ahụ. Mgbe mkpokọta amonia ọlaọcha mụbara site na 5 mM ruo 90 mM, ọnụ ọgụgụ nke mmiri ozuzo si na 13.67 g / kg ruo 481.81 g / kg. Tụkwasị na nke ahụ, ka ọnụọgụ ọlaọcha na-abawanye, ọrụ antibacterial megide E. coli na-abawanye na mbụ wee nọgide na-adị elu. Kpọmkwem, mgbe mkpokọta amonia ọlaọcha bụ 30 mM, ego ntinye ego nke ọla ọcha na akwa Ag / PVA / PP na-akpata bụ 67.62 g / kg, yana ọnụego antibacterial bụ 99.99%. ma họrọ ihe nlele a dị ka onye nnọchi anya maka njirimara nhazi usoro na-esote.
(a) Mmekọrịta dị n'etiti ọkwa nke ọrụ antibacterial na ọnụ ọgụgụ nke oyi akwa Ag na ntinye nke amonia ọlaọcha; (b) Foto dị iche iche nke efere omenala nje ndị e were igwefoto dijitalụ na-egosi ihe nlele na ihe nlele ndị a kwadebere site na iji 5 mM, 10 mM, 30 mM, 50 mmM na 90 mM ọlaọcha amonia. Ọrụ Antibacterial nke akwa Ag/PVA/PP megide Escherichia coli
Ọgụgụ 4a na-egosi ụdịdị FTIR/ATR nke PP, PVA/PP, Ag/PP na Ag/PVA/PP. Mkpokọta absorption nke eriri PP dị ọcha na 2950 cm-1 na 2916 cm-1 bụ n'ihi nhịahụ na-agbatị asymmetric nke -CH3 na -CH2- otu, na na 2867 cm-1 na 2837 cm-1 ha bụ n'ihi mgbatị mgbanaka nke -CH3 na -CH2 otu -. –CH3 na –CH2–. A na-ekwu na eriri nnabata ahụ dị na 1375 cm–1 na 1456 cm–1 sitere na ịma jijiji mgbanwe asymmetric na symmetric nke –CH338.39. Ụdị FTIR nke eriri Ag/PP yiri nke PP fiber. Na mgbakwunye na eriri absorption nke PP, a na-ekwu na ọ bụ ihe mgbagwoju anya nke njikọ hydrogen nke otu -OH, nke ọhụrụ absorption kacha elu na 3360 cm-1 nke PVA / PP na Ag / PVA / PP. Nke a na-egosi na a na-etinye PVA nke ọma n'elu eriri polypropylene. Tụkwasị na nke ahụ, ọnụ ọgụgụ kasị elu nke absorption hydroxyl nke ag / PVA / PP dị ntakịrị ike karịa nke PVA / PP ákwà, nke nwere ike ịbụ n'ihi nhazi nke ụfọdụ hydroxyl otu na ọlaọcha.
FT-IR ụdịdị (a), TGA curve (b) na XPS nha ụdịdị dị iche iche (c) nke dị ọcha PP, PVA / PP ákwà na Ag / PVA / PP ákwà, na C 1s ụdịdị dị iche iche nke PP dị ọcha (d), PVA / PP PP ákwà (e) na Ag 3d elu (f) nke Ag / PVA / PP ákwà.
Na Fig. Foto 4c na-egosi ụdị XPS nke PP, PVA/PP, na Ag/PVA/PP ákwà. Ihe mgbaàmà O 1 na-adịghị ike nke eriri polypropylene dị ọcha nwere ike ịpụta na ikuku oxygen na-adaba n'elu; A na-ekwu na ọnụ ọgụgụ C 1s dị na 284.6 eV bụ CH na CC (lee foto 4d). E jiri ya tụnyere eriri PP dị ọcha, akwa PVA / PP (Fig 4e) na-egosi arụmọrụ dị elu na 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) = 288-5 eV Tụkwasị na nke ahụ, O 1s ụdịdị PVA / PP ákwà nwere ike ịdị nso site na elu abụọ na 532.3 eV na 533.2 eV41 (Fig. S4), ọnụ ọgụgụ C 1 ndị a kwekọrọ na C-OH na H-C = O (hydroxyl ìgwè PVA na aldehyde glucose otu), nke kwekọrọ na data IR. The Ag/PVA/PP ákwà na-abụghị nke na-ejigide O 1s ụdịdị dị iche iche nke C-OH (532.3 eV) na HC = O (533.2 eV) (Ọgụgụ S5), nke mejupụtara 65.81% (atomic pasent) C, 22. 89. % O na 11.31% Ag (Fig. S4). Karịsịa, ọnụ ọgụgụ kasị elu nke Ag 3d5/2 na Ag 3d3 / 2 na 368.2 eV na 374.2 eV (Fig. 4f) n'ihu na-egosi na Ag NP na-doped n'elu PVA / PP42 nonwoven ákwà.
Ntugharị TGA (Fig 4b) nke PP dị ọcha, akwa Ag / PP, na ag / PVA / PP na-egosi na ha na-enweta usoro nrụpụta okpomọkụ yiri nke ahụ, na ntinye nke Ag NP na-eduga na ntakịrị mmụba na okpomọkụ mmebi okpomọkụ nke PP. eriri PVA/PP fibers (site na 480 Celsius C (PP fibers) ruo 495 Celsius C), ikekwe n'ihi nhazi nke mgbochi Ag43. N'otu oge ahụ, ihe fọdụrụnụ nke ihe atụ dị ọcha nke PP, Ag / PP, Ag / PVA / PP, Ag / PVA / PP-W50 na Ag / PP-W50 mgbe ikpo ọkụ na 800 ° C bụ 1.32%, 16.26% na 13. 86%. % n'otu n'otu 9.88% na 2.12% (suffix W50 ebe a na-ezo aka na okirikiri ịsa 50). Ihe fọdụrụ nke PP dị ọcha bụ ihe ndị na-adịghị ọcha, na nke fọdụrụ n'ime ihe ndị fọdụrụ na Ag NPs, na ọdịiche dị na ego fọdụrụnụ nke ejiri ọlaọcha mee ihe kwesịrị ịbụ n'ihi ụdị ọla ọcha nanoparticles dị iche iche. Tụkwasị na nke ahụ, mgbe ịsachara akwa Ag/PP ugboro 50, ihe ọlaọcha fọdụrụnụ belatara site na 94.65%, na ihe fọdụrụnụ ọlaọcha nke Ag/PVA/PP ákwà na-ebelata ihe dịka 31.74%. Nke a na-egosi na mkpuchi mkpuchi PVA nwere ike imeziwanye njikọ nke AgNP na matrix PP nke ọma.
Iji nyochaa iyi nkasi obi, a na-atụle ike ikuku na ikuku ikuku mmiri nke akwa polypropylene a kwadebere. N'ikwu okwu n'ozuzu, iku ume na-emetụta nkasi obi okpomọkụ nke onye ọrụ, karịsịa na gburugburu ebe dị ọkụ na iru mmiri44. Dị ka e gosiri na Figure 5a, ikuku permeability nke PP dị ọcha bụ 2050 mm / s, na mgbe mgbanwe nke PVA na-ebelata na 856 mm / s. Nke a bụ n'ihi na ihe nkiri PVA kpụrụ n'elu eriri PP na akụkụ a kpara akpa na-enyere aka belata oghere dị n'etiti eriri. Mgbe etinyere Ag NP, ikuku ikuku nke akwa PP na-abawanye n'ihi oriri nke mkpuchi PVA mgbe ị na-etinye Ag NP. Na mgbakwunye, ume iku ume nke akwa Ag/PVA/PP na-ebelata ka mkpokọta amonia ọlaọcha na-abawanye site na 10 ruo 50 mmol. Nke a nwere ike ịbụ n'ihi n'eziokwu na ọkpụrụkpụ nke nkwụnye ego ọlaọcha na-abawanye ụba nke amonia ọlaọcha, nke na-enyere aka belata ọnụ ọgụgụ nke pores na ohere nke ikuku mmiri na-agafe na ha.
(a) ikuku ikuku nke ag / PVA / PP akwa kwadebere na iche iche nke ọlaọcha amonia; (b) Mbufe ikuku mmiri nke akwa Ag / PVA / PP kwadebere na ihe dị iche iche nke ọlaọcha amonia; (c) Ihe dị iche iche na-agbanwe agbanwe Tensile curve nke Ag Fabric / PVA / PP nwetara na mkpokọta dị iche iche; (d) A na-egosipụtakwa ihe nrịbama nke ag / PVA / PP na-enweta na nha dị iche iche nke ọlaọcha amonia (Ag / PVA / PP akwa enwetara na 30 mM ọlaọcha amonia na-egosipụtakwa) (Tụlee ihe mgbochi nke akwa PP mgbe 40 na-asachapụ okirikiri).
Ọnụego nke nnyefe mmiri bụ ihe ọzọ dị mkpa na-egosi nkasi obi okpomọkụ nke ákwà45. Ọ tụgharịrị na mmiri permeability nke akwa na-emetụtakarị breathability na elu Njirimara. Ya bụ, ikuku permeability tumadi dabere na ọnụ ọgụgụ nke pores; Ihe ndị dị n'elu na-emetụta ike iru mmiri nke ìgwè hydrophilic site na mgbasa ozi-nsogbu-desorption nke mkpụrụ ndụ mmiri. Dị ka e gosiri na Figure 5b, mmiri permeability nke dị ọcha PP eriri bụ 4810 g / (m2 · 24h). Mgbe ejiri mkpuchi PVA mechie, ọnụ ọgụgụ nke oghere dị na eriri PP na-ebelata, ma mmiri permeability nke akwa PVA / PP na-abawanye ruo 5070 g / (m2 · 24 h), ebe ọ bụ na a na-ekpebi njedebe mmiri ya site na njirimara elu. ọ bụghị pores. Mgbe ntinye nke AgNPs, a na-abawanye ike iru mmiri nke akwa Ag/PVA/PP. Karịsịa, oke mmiri permeability nke akwa Ag / PVA / PP nwetara na ntinye amonia ọlaọcha nke 30 mM bụ 10300 g / (m2 · 24h). N'otu oge ahụ, dị iche iche mmiri permeability nke Ag / PVA / PP akwa nwetara na iche iche iche nke ọlaọcha amonia nwere ike jikọọ na ọdịiche dị na ọkpụrụkpụ nke ọlaọcha deposition oyi akwa na ọnụ ọgụgụ nke pores.
Ngwongwo arụrụ arụ nke akwa na-enwe mmetụta siri ike na ndụ ọrụ ha, ọkachasị dịka ihe eji emegharị46. Onyonyo 5c na-egosi mgbakasị mgbakasị ike nke akwa Ag/PVA/PP. The tensile ike nke dị ọcha PP bụ naanị 2.23 MPa, mgbe ike ike nke 1 wt% PVA / PP ákwà na-n'ụzọ dị ukwuu mụbara na 4.56 MPa, na-egosi na encapsulation nke PVA PP ákwà na-enyere aka budata mma ya n'ibu Njirimara. Njirimara. Ike ike na elongation na nkwụsị nke akwa PVA / PP na-abawanye na ntinye uche nke PVA modifier n'ihi na ihe nkiri PVA nwere ike imebi nrụgide ahụ ma mee ka eriri PP sie ike. Otú ọ dị, mgbe ntinye uche na-agbanwe agbanwe na-abawanye ruo 1.5 wt.%, PVA na-egbuke egbuke na-eme ka ákwà polypropylene sie ike, nke na-emetụta nkasi obi nke ukwuu.
E jiri ya tụnyere akwa PP na PVA / PP dị ọcha, ike nkwụsị na elongation na nkwụsị nke akwa Ag / PVA / PP na-emewanyewanye n'ihi na Ag nanoparticles na-ekesa n'otu n'otu n'elu eriri PP nwere ike kesaa ibu47,48. Enwere ike ịhụ na ike nkwụsị nke Ag / PP fiber dị elu karịa nke PP dị ọcha, na-eru 3.36 MPa (Fig 5d), nke na-akwado mmetụta siri ike na ike nke Ag NP. Karịsịa, akwa Ag / PVA / PP na-emepụta na amonia ọlaọcha nke 30 mM (kama 50 mM) na-egosipụta ike kachasị ike na elongation na nkwụsịtụ, nke ka bụ n'ihi ntinye edo nke Ag NPs yana ntinye edo. Nchikota nke ọlaọcha NP n'okpuru ọnọdụ nke nnukwu ntinye nke ọlaọcha amonia. Tụkwasị na nke ahụ, mgbe usoro 40 na-asachapụ, ike nkwụsị na elongation na nkwụsị nke Ag / PVA / PP ákwà a kwadebere na 30 mM ọlaọcha amonia na-ebelata site na 32.7% na 26.8%, n'otu n'otu (Fig 5d), nke nwere ike jikọta ya na obere mfu nke nanoparticles ọlaọcha na-edebe mgbe nke a gasịrị.
Ọnụọgụ 6a na b na-egosi foto igwefoto dijitalụ nke Ag/PVA/PP akwa na akwa Ag/PP mgbe ịsachara maka 0, 10, 20, 30, 40, na 50 cycles na 30 mM silver amonia focus. Akwa isi awọ Ag/PVA/PP na akwa Ag/PP jiri nwayọọ nwayọọ ghọọ isi awọ mgbe ịsachara; na mgbanwe agba nke mbụ n'oge ịsa ahụ adịghị ka ọ dị njọ dị ka nke abụọ. Tụkwasị na nke ahụ, e jiri ya tụnyere ákwà Ag / PP, ihe ọlaọcha nke Ag / PVA / PP ákwà na-ebelata nwayọọ nwayọọ mgbe ịsachara; mgbe ịsachara 20 ma ọ bụ karịa ugboro, nke mbụ na-ejigide ọdịnaya ọlaọcha dị elu karịa nke ikpeazụ (Fig 6c). Nke a na-egosi na ikpuchi eriri PP na mkpuchi PVA nwere ike imeziwanye njikọ nke Ag NP na eriri PP. Ihe oyiyi 6d na-egosi ihe oyiyi SEM nke Ag / PVA / PP akwa na akwa Ag / PP mgbe ịsachara maka 10, 40, na 50 cycles. Ngwongwo Ag/PVA/PP na-enweta obere mfu nke Ag NP n'oge ịsacha karịa akwa Ag / PP, ọzọ n'ihi na mkpuchi mkpuchi PVA na-enyere aka melite adhesion nke Ag NP na PP fibers.
(a) Foto nke akwa Ag / PP ejiri igwefoto dijitalụ (nke a na-ewere na 30 mM ọlaọcha amonia) mgbe ịsachara maka 0, 10, 20, 30, 40 na 50 cycles (1-6); (b) Ag / PVA / PP Foto nke akwa ejiri igwefoto dijitalụ (nke a na-ewere na 30 mM ọlaọcha amonia) mgbe ịsachara maka 0, 10, 20, 30, 40 na 50 cycles (1-6); (c) Mgbanwe na ọdịnaya ọlaọcha nke akwa abụọ n'ofe okirikiri ịsa; (d) SEM oyiyi nke Ag / PVA / PP ákwà (1-3) na Ag / PP ákwà (4-6) mgbe 10, 40 na 50 na-asa okirikiri okirikiri.
Onyonyo 7 na-egosi ọrụ antibacterial na foto igwefoto dijitalụ nke akwa Ag/PVA/PP megide E. coli mgbe 10, 20, 30 na 40 na-asachapụ okirikiri. Mgbe ịsachara 10 na 20, arụmọrụ antibacterial nke akwa Ag / PVA / PP nọgidere na 99.99% na 99.93%, na-egosipụta ọrụ antibacterial dị mma. Ogo nje bacteria nke Ag/PVA/PP na-ebelata ntakịrị mgbe 30 na 40 ugboro ịsacha, nke bụ n'ihi ọnwụ nke AgNP mgbe ịsachara ogologo oge. Otú ọ dị, ọnụ ọgụgụ antibacterial nke Ag / PP ákwà mgbe 40 sachara bụ nanị 80.16%. O doro anya na mmetụta antibacterial nke Ag / PP ákwà mgbe 40 cycles na-asachapụ dị nnọọ obere karịa nke Ag / PVA / PP ákwà.
(a) Ọkwa nke ọrụ antibacterial megide E. coli. (b) Maka ntụnyere, a na-egosikwa foto nke akwa Ag/PVA/PP na igwefoto dijitalụ mgbe ị sachara akwa Ag/PP na 30 mM ọlaọcha amonia maka 10, 20, 30, 40 na 40 cycles.
Na Fig. Nkeji 8 na-egosi n'ụzọ zuru ezu n'ichepụta akwa akwa Ag/PVA/PP buru ibu site na iji ụzọ mpịakọta mpịakọta abụọ. Ya bụ, a na-etinye ihe ngwọta PVA / glucose n'ime mpịakọta mpịakọta ruo oge ụfọdụ, wee wepụ ya, wee tinye ya na ọlaọcha amonia ngwọta n'otu ụzọ ahụ iji nweta akwa Ag / PVA / PP. (Fig. 8a). Ihe a na-emepụta Ag/PVA/PP ka na-ejigide ọrụ nje bacteria dị mma ọbụna ma ọ bụrụ na ọ hapụrụ otu afọ. Maka nkwadebe buru ibu nke akwa Ag / PVA / PP, a na-etinye PP nonwovens n'ime usoro mpịakọta na-aga n'ihu wee gafere site na ngwọta PVA/glucose na ngwọta amonia ọlaọcha n'usoro ma hazie ya. ụzọ abụọ. Vidiyo agbakwunyere. A na-achịkwa oge impregnation site n'ịgbanwe ọsọ nke roller, na ọnụ ọgụgụ nke ngwọta adsorbed na-achịkwa site n'ịgbanwe ebe dị anya n'etiti rollers (Fig. 8b), si otú ahụ nweta ihe mgbaru ọsọ Ag / PVA / PP na-enweghị akwa akwa nke nnukwu nha (50 cm × 80 cm). ) na mkpokọta roller. Usoro dum dị mfe ma dị irè, nke na-eme ka mmepụta ihe dị ukwuu.
Eserese eserese nke mmepụta nke ngwaahịa ebumpụta ụwa buru ibu (a) na schematic eserese nke usoro mpịakọta maka imepụta ihe ndị na-abụghị nke Ag/PVA/PP (b).
A na-emepụta ihe ndị na-abụghị nke PVA/PP nwere ọlaọcha site na iji teknụzụ ntinye mmiri dị n'ime ọnọdụ dị mfe jikọtara ya na ụzọ mpịakọta na-atụgharị. Tụnyere PP ákwà na PVA / PP ákwà, na n'ibu Njirimara nke kwadebere Ag / PVA / PP nonwoven ákwà na-nke ọma n'ihi na PVA sealing oyi akwa nwere ike budata mma nrapado nke Ag NPs na PP emep uta eri. Tụkwasị na nke ahụ, ọnụọgụ PVA na ọdịnaya nke ọlaọcha NP dị na akwa Ag / PVA / PP na-enweghị akwa nwere ike ịchịkwa nke ọma site na ịhazi nhazi nke ngwọta PVA / glucose na ngwọta amonia ọlaọcha. Karịsịa, ag / PVA / PP nonwoven ákwà kwadebere iji 30 mM ọlaọcha amonia ngwọta gosiri kasị mma n'ibu Njirimara na-ejigide magburu onwe antibacterial ọrụ megide E. coli ọbụna mgbe 40 ịsa cycles, na-egosi ezi mgbochi-fouling ikike. PP anaghị kpara ihe. N'iji ya tụnyere data akwụkwọ ndị ọzọ, akwa ndị anyị nwetara site na iji ụzọ dị mfe gosipụtara nguzogide dị mma nke ịsacha. Tụkwasị na nke a, ihe ndị na-emepụta Ag / PVA / PP na-enweghị akwa nwere ezigbo mmiri permeability na iyi nkasi obi, nke nwere ike ịkwado ngwa ya na ngwa mmepụta ihe.
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Emam, HE, Mikhail, MM, El-Serbiny, S., Nagy, KS na Ahmed, HB Metal-based nanocatalysis maka aromatic mmetọ mbelata. Wenezde. sayensị. mmetọ. akụ. mba ụwa. 27, 6459–6475 (2020).
Ahmed HB na Emam HE Triple core-shell (Ag-Au-Pd) nanostructures toro site na mkpụrụ n'ime ụlọ okpomọkụ maka enwere ike ime ka mmiri dị ọcha. polymer. nwale. 89, 106720 (2020).
Oge nzipu: Nov-26-2023