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Uyu munsi, imyenda ikora ifite antibacterial irakunzwe cyane. Nyamara, umusaruro uhenze wimyenda ikora hamwe nibikorwa biramba kandi bihoraho bikomeje kuba ingorabahizi. Inzoga ya Polyvinyl (PVA) yakoreshejwe mu guhindura imyenda ya polypropilene (PP), hanyuma nanoparticles ya silver (AgNPs) ishyirwa mu mwanya kugirango ikore PVA yahinduwe na AgNPs yuzuye PP (yitwa AgNPs). / PVA / PP) umwenda. Encapsulation ya fibre ya PP ikoresheje igipfundikizo cya PVA ifasha kunoza cyane guhuza kwa Ag NPs zipakiye kuri fibre ya PP, kandi Ag / PVA / PP idafite imyenda yerekana uburyo bwiza bwubukanishi no kurwanya Escherichia coli (bita E. coli). Mubisanzwe, Ag / PVA / PP imyenda idoda ikozwe kuri 30mM ya silver ammonia yibanze ifite imiterere yubukanishi, kandi igipimo cyo kurinda antibacterial anti E. coli kigera kuri 99,99%. Imyenda iracyafite ibikorwa byiza bya antibacterial nyuma yo gukaraba 40 kandi ifite ubushobozi bwo kuyikoresha inshuro nyinshi. Byongeye kandi, Ag / PVA / PP imyenda idoda ifite amahirwe menshi yo gukoreshwa mu nganda bitewe n’imyuka ihumeka neza hamwe n’ubushuhe. Mubyongeyeho, twateje imbere tekinoroji yo kuzunguruka no gukora ubushakashatsi bwibanze kugirango tumenye niba ubu buryo bushoboka.
Hamwe n’iterambere ry’ubukungu bw’isi yose, umubare munini w’abaturage wiyongereye cyane ku buryo bwo kwandura virusi, ibyo bikaba bisobanura neza impamvu igitabo cyitwa coronavirus gifite ubushobozi bukomeye bwo gukwira isi yose kandi bigoye gukumira 1,2,3. Ni muri urwo rwego, hakenewe byihutirwa guteza imbere ibikoresho bishya bya antibacterial, nka polypropilene (PP) idoda, nkibikoresho byo kurinda ubuvuzi. Imyenda ya polypropilene idoda idoda ifite ibyiza byubucucike buke, ubudahangarwa bwimiti nigiciro gito4, ariko ntabwo ifite ubushobozi bwa antibacterial, ubuzima bwigihe gito nubushobozi buke bwo kurinda. Kubwibyo, ni ngombwa cyane gutanga imiti igabanya ubukana bwa PP ibikoresho bidoda.
Nka antibacterial antique ya kera, ifeza yanyuze mubyiciro bitanu byiterambere: igisubizo cya silver colloidal, sulfadiazine ya silver, umunyu wa feza, silver protein na nanosilver. Ifeza ya nanoparticles ikoreshwa cyane mubice nkubuvuzi5,6, ubwikorezi 7,8,9, kuzamura Raman ikwirakwiza hejuru ya 10,11,12, kwangirika kwa catalitike y’amabara 13,14,15,16 nibindi. kwemerwa17,18,19. Byongeye kandi, nanoparticles ya feza ifite ubuso bunini bwihariye hamwe nigikorwa kinini cya antibacterial irashobora kwomekwa kumyenda yubwoya20, ibitambara by'ipamba21,22, imyenda ya polyester nibindi bitambaro kugirango bigere kurekurwa, bikomeje kurekurwa kwa feza ya antibacterial 23,24. Ibi bivuze ko mugukurikirana AgNPs, birashoboka gukora imyenda ya PP hamwe nibikorwa bya antibacterial. Ariko, PP idahwitse ibura amatsinda ikora kandi ifite polarite nkeya, ntabwo ifasha enapsulation ya AgNPs. Kugira ngo iki kibazo gikemuke, abashakashatsi bamwe bagerageje gushyira Ag nanoparticles hejuru yimyenda ya PP bakoresheje uburyo butandukanye bwo guhindura harimo gutera plasma 26.27, imishwarara 28,29,30,31 hamwe no gutwikira hejuru32. Kurugero, Goli n'abandi. [33] Yashyizeho poroteyine itwikiriye hejuru y’imyenda ya PP idoda, aside amine iri hafi y’urwego rwa poroteyine irashobora kuba nk'ingingo zifatika zo guhuza AgNPs, bityo zikagera kuri antibacterial nziza. ibikorwa. Li n'abo bakorana 34 basanze N-isopropylacrylamide na N- (3-aminopropyl) methacrylamide hydrochloride ifatanije na ultraviolet (UV) yerekanaga ibikorwa bikomeye bya mikorobe, nubwo inzira ya UV itoroshye kandi ishobora gutesha agaciro imashini. fibre. . Oliani nabandi bateguye firime ya Ag NPs-PP hamwe nibikorwa byiza bya antibacterial mukwiyitirira PP nziza hamwe na irrasiyo ya gamma; ariko, uburyo bwabo nabwo bwari bugoye. Niyo mpamvu, bikomeje kuba ingorabahizi kubyara byoroshye kandi byoroshye kubyara polipropilene idasubirwamo idafite ibikorwa bya mikorobe yifuzwa.
Muri ubu bushakashatsi, inzoga za polyvinyl, zangiza ibidukikije kandi zihenze cyane za membrane zifite ubushobozi bwiza bwo gukora firime, hydrophilique nyinshi, hamwe n’imiterere ihamye y’umubiri n’imiti, ikoreshwa mu guhindura imyenda ya polypropilene. Glucose ikoreshwa nkumukozi ugabanya36. Kwiyongera kwingufu zubuso bwa PP yahinduwe biteza imbere guhitamo kwa AgNPs. Ugereranije nigitambara cyiza cya PP, imyenda yateguwe ya Ag / PVA / PP yerekanaga uburyo bwiza bwo kongera gukoreshwa, ibikorwa byiza bya antibacterial kurwanya E. coli, ibikoresho byiza bya mashini ndetse na nyuma yo gukaraba 40, hamwe no guhumeka gukomeye, guhuza ibitsina nubushuhe.
Imyenda ya PP idoda idakomeye ifite uburemere bwihariye bwa 25 g / m2 n'ubugari bwa mm 0.18 yatanzwe na Jiyuan Kang'an Sanitary Materials Co., Ltd. (Jiyuan, Ubushinwa) hanyuma ikata mo impapuro zipima cm 5 × 5 cm2. Nitrat ya silver (99.8%; AR) yaguzwe muri Xilong Scientific Co., Ltd. (Shantou, Ubushinwa). Glucose yaguzwe na Fuzhou Neptune Fuyao Pharmaceutical Co., Ltd. (Fuzhou, Ubushinwa). Inzoga ya Polyvinyl (reagent yo mu nganda) yaguzwe mu ruganda rukora imiti rwa Tianjin Sitong (Tianjin, Ubushinwa). Amazi ya Deionised yakoreshejwe nk'umuti cyangwa koga kandi yateguwe muri laboratoire yacu. Agar nintungamubiri zaguzwe muri Beijing Aoboxing Biotechnology Co., Ltd. (Beijing, Ubushinwa). E. coli strain (ATCC 25922) yaguzwe na Sosiyete Zhangzhou Bochuang (Zhangzhou, Ubushinwa).
Ibice bya PP byavuyemo byogejwe na ultrasound muri Ethanol muminota 15. PVA yavuyemo yongewe mumazi ashyuha kuri 95 ° C mumasaha 2 kugirango ubone igisubizo cyamazi. Hanyuma glucose yashongeshejwe muri ml 10 yumuti wa PVA hamwe nigice kinini cya 0.1%, 0.5%, 1.0% na 1.5%. Imyenda isukuye ya polypropilene idoda idogejwe mumashanyarazi ya PVA / glucose hanyuma ishyuha kuri 60 ° C kumasaha 1. Nyuma yo gushyushya birangiye, imyenda yatewe na PP yatewe mu mwenda wa PVA / glucose hanyuma yumishwa kuri 60 ° C kuri 0.5 h kugirango ikore firime ya PVA hejuru yurubuga, bityo ibone PVA / PP. imyenda.
Nitrate ya feza ishonga muri ml 10 y'amazi hamwe no guhora bikurura ubushyuhe bwicyumba kandi ammonia ikongerwamo ibitonyanga kugeza igisubizo gihindutse kiva mubururu kijya kumururu kandi cyongeye kugaragara kugirango kibone igisubizo cya amoniya (5-90 mM). Shira umwenda wa PVA / PP mubisubizo bya silver ammonia hanyuma ubishyuhe kuri 60 ° C kumasaha 1 kugirango ube Ag nanoparticles mumwanya hejuru yigitambara, hanyuma ubyoze n'amazi inshuro eshatu hanyuma wumuke kuri 60 ° C. C kuri 0.5 h kugirango ubone Ag / PVA / PP umwenda.
Nyuma yubushakashatsi bwibanze, twubatse ibikoresho byo kuzunguruka muri laboratoire kugirango habeho umusaruro munini wimyenda ikomatanya. Ibizingo bikozwe muri PTFE kugirango birinde ingaruka mbi no kwanduza. Muri iki gikorwa, igihe cyo gutera akabariro hamwe nigisubizo cyibisubizo byamamaza birashobora kugenzurwa muguhindura umuvuduko wibizunguruka hamwe nintera iri hagati yizunguruka kugirango ubone umwenda wifuza Ag / PVA / PP.
Ubuso bwa tissue morphologie bwakozwe hakoreshejwe VEGA3 scanning electron microscope (SEM; Ubuyapani Electronics, Ubuyapani) kuri voltage yihuta ya 5 kV. Imiterere ya kirisiti ya nanoparticles ya silver yasesenguwe no gutandukanya X-ray (XRD; Bruker, D8 Advanced, Ubudage; Imirasire ya Cu Kα, λ = 0.15418 nm; voltage: 40 kV, ikigezweho: 40 mA) mu ntera ya 10-80 °. 2θ. Impinduka ya Fourier ihinduranya infragre (ATR-FTIR; Nicolet 170sx, Thermo Fisher Scientific Incorporation) yakoreshejwe mu gusesengura imiterere yimiti yimyenda ya polipropilene yahinduwe. Ibice bya PVA bihindura imyenda ya Ag / PVA / PP byapimwe nisesengura rya termogravimetric (TGA; Mettler Toledo, Ubusuwisi) munsi yumugezi wa azote. Indangantego ihujwe na plasma mass spectrometrie (ICP-MS, ELAN DRC II, Perkin-Elmer (Hong Kong) Co., Ltd.) yakoreshejwe kugirango hamenyekane ibiceri bya silver bya Ag / PVA / PP.
Ikwirakwizwa ry’ikirere hamwe n’amazi yohereza imyuka y’amazi ya Ag / PVA / PP (ibisobanuro: 78 × 50cm2) byapimwe n’ikigo cy’ibizamini cy’abandi bantu (Tianfangbiao Standardization Certification and Testing Co., Ltd.) hakurikijwe GB / T. 5453-1997 na GB / T 12704.2-2009. Kuri buri cyitegererezo, ingingo icumi zitandukanye zatoranijwe kugirango zipimwe, kandi amakuru yatanzwe nikigo ni impuzandengo y'amanota icumi.
Igikorwa cya antibacterial yimyenda ya Ag / PVA / PP yapimwe hakurikijwe ibipimo byubushinwa GB / T 20944.1-2007 na GB / T 20944.3- hakoreshejwe uburyo bwo gukwirakwiza agar plate (isesengura ryujuje ubuziranenge) hamwe nuburyo bwa shake flask (isesengura ryinshi). . Ibikorwa bya antibacterial ya Ag / PVA / PP umwenda uhuriweho na Escherichia coli wagenwe mugihe cyo gukaraba. Kuburyo bwo gukwirakwiza amasahani ya agar, ikizamini cya Ag / PVA / PP cyimyenda ikubiswe muri disiki (diameter: 8 mm) ukoresheje punch hanyuma ugashyirwa kumasahani ya agar Petri yatewe na Escherichia coli (ATCC 25922). ; 3.4 × 108 CFU ml-1) hanyuma igashyirwa kuri 37 ° C na 56% ugereranije nubushuhe bwamasaha 24. Agace kabujijwe gusesengurwa mu buryo buhagaritse kuva hagati ya disiki kugeza umuzenguruko w'imbere wa koloni ikikije. Hifashishijwe uburyo bwa shake flask, isahani ya 2 × 2 cm2 yateguwe uhereye kumyenda ya Ag / PVA / PP yapimwe hanyuma igashyirwa kuri autoclave ahantu hasukuye kuri 121 ° C na 0.1 MPa muminota 30. Nyuma ya autoclaving, icyitegererezo cyinjijwe mumashanyarazi ya mL 5 ya Erlenmeyer irimo 70 mL yumuti wumuco wumuyonga (guhagarika 1 × 105–4 × 105 CFU / mL) hanyuma ugashyirwa mubushyuhe bukabije bwa 150 ° C. rpm na 25 ° C mu masaha 18. Nyuma yo kunyeganyega, kusanya umubare runaka wa bagiteri ihagarikwa hanyuma uyigabanye inshuro icumi. Kusanya umubare ukenewe wa bagiteri ihindagurika, uyikwirakwize kuri agar medium n'umuco kuri 37 ° C na 56% ugereranije nubushuhe bwamasaha 24. Inzira yo kubara imikorere ya antibacterial ni: \ (\ frac {\ mathrm {C} - \ mathrm {A}} {\ mathrm {C}} \ cdot 100 \% \), aho C na A ari umubare wabakoloni nyuma yamasaha 24. Guhingwa mumatsinda yo kugenzura hamwe na Ag / PVA / PP ibice bigize ibice.
Kuramba kwimyenda ya Ag / PVA / PP yasuzumwe no gukaraba ukurikije ISO 105-C10: 2006.1A. Mugihe cyo gukaraba, shira ikizamini Ag / PVA / PP umwenda wuzuye (30x40mm2) mumuti wamazi urimo ibintu byogucuruza (5.0g / L) hanyuma ubyoze kuri 40 ± 2 rpm na 40 ± 5 rpm / min. umuvuduko mwinshi. ° C 10, 20, 30, 40 na 50. Nyuma yo gukaraba, umwenda wogejwe inshuro eshatu n'amazi hanyuma ukumishwa ku bushyuhe bwa 50-60 ° C muminota 30. Ihinduka ryibintu bya feza nyuma yo gukaraba byapimwe kugirango hamenyekane urugero rwibikorwa bya antibacterial.
Igishushanyo 1 kirerekana igishushanyo mbonera cyo guhimba Ag / PVA / PP umwenda. Nukuvuga ko PP idoda idashizwe mumuti ivanze ya PVA na glucose. PP-yatewe inda idakozwe mububiko yumishijwe kugirango ikosore modifier kandi igabanye agent kugirango ikore kashe. Imyenda yumye ya polypropilene idoze idashizwe mumuti wa ammonia ya silver kugirango ubike nanoparticles ya silver. Ubwinshi bwa modifier, igipimo cya molarike ya glucose na amoniya ya silver, kwibumbira hamwe kwa amoniya ya silver hamwe nubushyuhe bwa reaction bigira ingaruka kumvura ya Ag NPs. ni ibintu by'ingenzi. Igicapo 2a cerekana kwishingira inguni y'amazi yo guhuza Ag / PVA / PP kumyenda ihinduka. Iyo intumbero yo guhindura ibintu yiyongereye kuva kuri 0.5 wt.% Kugeza kuri 1.0 wt.%, Inguni yo guhuza imyenda ya Ag / PVA / PP igabanuka cyane; iyo modifier yibandaho yiyongera kuva 1.0 wt.% kugeza kuri 2.0 wt.%, mubyukuri ntabwo ihinduka. Igishushanyo cya 2 b cyerekana amashusho ya SEM ya fibre nziza ya PP hamwe nigitambara cya Ag / PVA / PP cyateguwe kuri 50 mM ya feza ya ammonia hamwe na rati zitandukanye za glucose na amoniya ya feza (1: 1, 3: 1, 5: 1, na 9: 1). . ishusho. ). Fibre ya PP yavuyemo iroroshye. Nyuma yo gufatana na firime ya PVA, fibre zimwe zifatanije hamwe; Bitewe no gushira kwa nanoparticles ya silver, fibre iba ikabije. Nkuko igipimo cyimyororokere igabanya glucose na glucose cyiyongera, igipimo cyabitswe cya Ag NPs kigenda cyiyongera buhoro buhoro, kandi uko igipimo cyimyororokere cyiyongera kuri 5: 1 na 9: 1, Ag NPs ikunda gukora igiteranyo. Amashusho ya Macroscopique na microscopique ya fibre ya PP ahinduka kimwe, cyane cyane iyo igipimo cyimyororokere yo kugabanya agent na glucose ari 5: 1. Amafoto ya digitale yicyitegererezo yabonetse kuri 50 mM ya silver ammonia yerekanwa mubishusho S1.
Impinduka muburyo bwo guhuza amazi ya Ag / PVA / PP kumyenda itandukanye ya PVA (a), SEM ishusho yimyenda ya Ag / PVA / PP yabonetse kumurima wa amoniya ya feza ingana na mM 50 hamwe na marike itandukanye ya glucose na amoniya ya feza [(b))); (1) Fibre ya PP, (5) 90 mM na (6) Ag / PP-30 mM. Ubushyuhe bwa reaction ni 60 ° C.
Igishushanyo cya 2c cyerekana X-ray itandukanya ishusho yimyenda ya Ag / PVA / PP. Usibye gutandukanya impinga ya PP fibre 37, impinga enye zo gutandukanya kuri 2θ = ∼ 37.8 °, 44.2 °, 64.1 ° na 77.3 ° bihuye na (1 1 1), (2 0 0), (2 2 0), indege ya Crystal (3 1 1) ya cubic face-centre ya silver nanoparticles. Mugihe ifeza ya ammonia yiyongereye kuva kuri 5 kugeza kuri 90 mM, imiterere ya XRD ya Ag igenda ikarishye, bigahuza no kwiyongera kwa kristu. Dukurikije formulaire ya Scherrer, ingano y ingano ya Ag nanoparticles yateguwe na mM 10, 30 mM na 50 mM ya amoniya ya feza yabazwe ni 21.3 nm, 23.3 nm na 26.5 nm. Ni ukubera ko kwibumbira hamwe kwa feza ammonia nimbaraga zitera kugabanuka kwifumbire ya feza. Hamwe no kwiyongera kwa silver ammonia, umuvuduko wa nucleation no gukura kwa Ag NPs uriyongera. Igishushanyo 2d cyerekana SEM amashusho yimyenda ya Ag / PVA / PP yabonetse kubintu bitandukanye bya Ag ammonia. Kuri feza ya ammonia ya 30 mM, igipimo cyabitswe cya Ag NPs ni kimwe. Ariko, iyo ifumbire ya silver ammonia iba myinshi cyane, uburinganire bwikigega cya Ag NP bukunda kugabanuka, ibyo bikaba bishobora guterwa no guhuriza hamwe gukomeye kwa Ag NP. Mubyongeyeho, nanoparticles ya feza hejuru ifite imiterere ibiri: serefegitura na scaly. Ingano ya serefegitura ingana na 20-80 nm, naho ubunini bwa lamellar bungana na 100-300 nm (Ishusho S2). Igice cyo kubika Ag nanoparticles hejuru yimyenda ya PP idahinduwe. Byongeye kandi, kongera ubushyuhe butuma igabanuka rya Ag NPs (Igicap. S3), ariko hejuru cyane ubushyuhe bwa reaction ntabwo buteza imvura ihitamo ya Ag NPs.
Igishushanyo cya 3a cyerekana isano iri hagati yubunini bwa feza ya amoniya, ingano ya feza yabitswe, nigikorwa cya antibacterial yimyenda ya Ag / PVA / PP. Igicapo 3b cerekana uburyo bwa antibacterial yuburyo bwintangarugero muburyo butandukanye bwa amoniya ya feza, ishobora kwerekana neza antibacterial status yintangarugero. Iyo ifumbire ya amoniya ya feza yiyongereye kuva kuri mM 5 ikagera kuri mM 90, ingano yimvura yaguye yavuye kuri 13.67 g / kg igera kuri 481.81 g / kg. Mubyongeyeho, uko ingano ya feza yiyongera, ibikorwa bya antibacterial kurwanya E. coli byabanje kwiyongera hanyuma bikaguma kurwego rwo hejuru. By'umwihariko, iyo ifumbire ya amoniya ya feza ari 30 mM, umubare w'ifeza woherejwe mu mwenda wa Ag / PVA / PP ni 67,62 g / kg, naho antibacterial ni 99,99%. hanyuma uhitemo icyitegererezo nkuhagarariye kubiranga imiterere ikurikira.
(a) Isano iri hagati yurwego rwibikorwa bya antibacterial nubunini bwa Ag layer yakoreshejwe hamwe nubunini bwa amoniya ya silver; . Ibikorwa bya antibacterial ya Ag / PVA / PP umwenda urwanya Escherichia coli
Igicapo 4a cerekana FTIR / ATR yerekanwe ya PP, PVA / PP, Ag / PP na Ag / PVA / PP. Imiyoboro yo kwinjiza fibre yuzuye ya PP kuri cm 2950 cm-1 na 2916 cm-1 biterwa no kunyeganyega kwa asimmetrike kurambura amatsinda ya –CH3 na –CH2-, naho kuri cm 2867 cm-1 na cm 2837 cm-1 biterwa no kunyeganyega kurambuye kwitsinda rya –CH3 na –CH2 -. –CH3 na –CH2–. Imiyoboro yo kwinjiza kuri cm 1375 - 1 na 1456 cm - 1 biterwa no kunyeganyega kwa asimmetrike na simmetrike ya –CH338.39. FTIR spektr ya Ag / PP fibre isa niyya PP fibre. Usibye umurongo wo kwinjiza PP, impinga nshya yo kwinjirira kuri cm 3360 cm-1 yimyenda ya PVA / PP na Ag / PVA / PP biterwa no kurambura imigozi ya hydrogène yitsinda rya –OH. Ibi birerekana ko PVA ikoreshwa neza hejuru ya fibre polypropilene. Byongeye kandi, impanuka ya hydroxyl yo gukuramo imyenda ya Ag / PVA / PP ifite intege nke ugereranije n’igitambara cya PVA / PP, gishobora guterwa no guhuza amatsinda amwe ya hydroxyl hamwe na feza.
Ikirangantego cya FT-IR (a), umurongo wa TGA (b) na XPS yo gupima (c) yimyenda ya PP yera, PVA / PP nigitambara cya Ag / PVA / PP, na C 1s yerekana imyenda yera ya PP (d), imyenda ya PVA / PP PP (e) na Ag 3d impinga (f) yimyenda ya Ag / PVA / PP.
Igishushanyo cya 4c cyerekana XPS yerekanwe ya PP, PVA / PP, na Ag / PVA / PP. Intege nke za O 1s ya fibre nziza ya polypropilene irashobora kwitirirwa kubintu bya ogisijeni yamamajwe hejuru; impinga ya C 1s kuri 284.6 eV yitirirwa CH na CC (reba Ishusho 4d). Ugereranije na fibre nziza ya PP, imyenda ya PVA / PP (Igishusho 4e) yerekana imikorere ikomeye kuri 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) na 288.5 eV (H - C = O) 38. Byongeye kandi, O 1s yerekana imyenda ya PVA / PP irashobora kugereranywa nimpinga ebyiri kuri 532.3 eV na 533.2 eV41 (Igicap. Imyenda ya Ag / PVA / PP idoda imyenda igumana O 1s ya C-OH (532.3 eV) na HC = O (533.2 eV) (Igicapo S5), igizwe na 65.81% (atome ku ijana) C, 22. 89.% O na 11.31% Ag (Ishusho S4). By'umwihariko, impinga ya Ag 3d5 / 2 na Ag 3d3 / 2 kuri 368.2 eV na 374.2 eV (Igishusho 4f) irerekana kandi ko Ag NPs zometse ku mwenda wa PVA / PP42.
Imirongo ya TGA (Igicapo 4b) yimyenda yera ya PP, Ag / PP, hamwe nigitambara cya Ag / PVA / PP yerekana ko bahura nuburyo busa bwo kubora, kandi gushira kwa Ag NPs bituma habaho kwiyongera gake mubushyuhe bwo gutakaza ubushyuhe bwa PP. fibre PVA / PP fibre (kuva 480 ° C (fibre PP) kugeza 495 ° C), bishoboka ko biterwa no gushiraho Ag bariyeri43. Muri icyo gihe, umubare usigaye w'icyitegererezo cyiza cya PP, Ag / PP, Ag / PVA / PP, Ag / PVA / PP-W50 na Ag / PP-W50 nyuma yo gushyuha kuri 800 ° C wari 1.32%, 16.26% na 13. 86%. % ukurikije 9.88% na 2,12% (umugereka W50 hano bivuga 50 yo gukaraba). Ibisigaye bya PP byera byitirirwa umwanda, naho ibisigaye byintangarugero kuri Ag NPs, kandi itandukaniro ryumubare usigaye wintangarugero zuzuye ifeza zigomba guterwa nubwinshi butandukanye bwa nanoparticles zipakiye. Byongeye kandi, nyuma yo koza imyenda ya Ag / PP inshuro 50, ifeza isigaye yagabanutseho 94,65%, naho ifeza isigaye y’ibitambaro bya Ag / PVA / PP yagabanutseho hafi 31,74%. Ibi birerekana ko PVA ikubiyemo igifuniko gishobora kunoza neza guhuza AgNPs kuri matrike ya PP.
Kugirango dusuzume kwambara neza, hapimwe igipimo cyo guhumeka ikirere hamwe n’amazi yohereza imyuka ya polipropilene yateguwe. Muri rusange, guhumeka bifitanye isano nubushyuhe bwumukoresha, cyane cyane ahantu hashyushye nubushuhe44. Nkuko bigaragara ku gishushanyo cya 5a, umwuka woguhumeka wa PP ni 2050 mm / s, hanyuma nyuma yo guhindura PVA igabanuka kugera kuri 856 mm / s. Ni ukubera ko firime ya PVA yakozwe hejuru ya fibre ya PP nigice kiboheye gifasha kugabanya icyuho kiri hagati ya fibre. Nyuma yo gukoresha Ag NPs, umwuka wimyuka ya PP wiyongera bitewe no gukoresha igifuniko cya PVA mugihe ukoresheje Ag NPs. Byongeye kandi, guhumeka imyenda ya Ag / PVA / PP ikunda kugabanuka mugihe ifumbire ya amoniya ya silver yiyongera kuva kuri mm 10 kugeza kuri 50. Ibi birashobora guterwa nuko umubyimba wububiko bwa feza wiyongera hamwe no kongera ifumbire ya silver ammonia, ifasha kugabanya umubare wimyenge ndetse no kuba imyuka y'amazi inyuramo.
. (b) Gukwirakwiza imyuka y'amazi ya Ag / PVA / PP imyenda yateguwe hamwe na amoniya ya feza itandukanye; (c) Impinduka zinyuranye Tensile curve ya Ag Fabric / PVA / PP yabonetse mubitekerezo bitandukanye; (d.
Igipimo cyo kwanduza imyuka y'amazi nikindi kimenyetso cyingenzi cyerekana ubushyuhe bwumuriro wigitambara45. Bigaragara ko ubuhehere bwimyenda yimyenda buterwa ahanini no guhumeka hamwe nubutaka. Ni ukuvuga, uburyo bwo guhumeka ikirere biterwa ahanini numubare wa pore; Imiterere yubuso igira ingaruka kumyunyu ngugu ya hydrophilique binyuze muri adsorption-diffusion-desorption ya molekile y'amazi. Nkuko bigaragara ku gishushanyo cya 5b, ubwinshi bw’amazi ya fibre ya PP ni 4810 g / (m2 · 24h). Nyuma yo gufunga igifuniko cya PVA, umubare wibyobo biri muri fibre ya PP uragabanuka, ariko ubwinshi bwamazi yimyenda ya PVA / PP bwiyongera kuri 5070 g / (m2 · 24 h), kubera ko ubwinshi bw’amazi bugenwa ahanini nubutaka. ntabwo ari imyenge. Nyuma yo gushira kwa AgNPs, ubwinshi bwamazi yimyenda ya Ag / PVA / PP yarushijeho kwiyongera. By'umwihariko, ubushuhe ntarengwa bw’imyenda ya Ag / PVA / PP yabonetse ku gipimo cya amoniya ya feza ya mM 30 ni 10300 g / (m2 · 24h). Muri icyo gihe, ubuhehere butandukanye bw’imyenda ya Ag / PVA / PP yabonetse ku buryo butandukanye bwa ammonia ya feza irashobora kuba ifitanye isano n’itandukaniro ryubunini bwikigero cya feza n'umubare wa pore yacyo.
Imiterere yimyenda yimyenda igira uruhare runini mubuzima bwabo bwa serivisi, cyane cyane nkibikoresho bisubirwamo46. Igicapo 5c cerekana umurongo uhangayikishije umurongo wa Ag / PVA / PP. Imbaraga zingana za PP nziza ni 2,23 MPa gusa, mugihe imbaraga zingana zingana na 1 wt% umwenda wa PVA / PP wiyongereye cyane kugera kuri MPa 4.56, byerekana ko gufunga imyenda ya PVA PP bifasha kuzamura cyane imiterere yubukanishi. imitungo. Imbaraga zingana no kuramba mugihe cyo kumena imyenda ya PVA / PP byiyongera hamwe no kongera imbaraga za modifike ya PVA kuko firime ya PVA irashobora guhagarika imihangayiko no gushimangira fibre ya PP. Ariko, iyo modifier yibintu byiyongereye kugera kuri 1.5 wt.%, PVA ifatanye ituma imyenda ya polypropilene ikomera, bigira ingaruka zikomeye kwambara neza.
Ugereranije nigitambara cyiza cya PP na PVA / PP, imbaraga zingana no kuramba mugihe cyo kumena imyenda ya Ag / PVA / PP irusheho kunozwa kuko Ag nanoparticles ikwirakwizwa kimwe hejuru ya fibre PP irashobora gukwirakwiza umutwaro 47,48. Birashobora kugaragara ko imbaraga zingutu za fibre ya Ag / PP iruta iyo PP isukuye, igera kuri 3.36 MPa (Igishusho 5d), ibyo bikaba byemeza ingaruka zikomeye kandi zikomeye za Ag NPs. By'umwihariko, umwenda wa Ag / PVA / PP wakozwe kuri feza ya amoniya ya feza ya mM 30 (aho kuba 50 mM) ugaragaza imbaraga ntarengwa no kuramba mu kiruhuko, ibyo bikaba bikomeje guterwa na Ag NPs kimwe no kubitsa kimwe. Gukusanya ifeza NPs mubihe byinshi bya amoniya ya silver. Byongeye kandi, nyuma yo gukaraba 40, imbaraga zingana no kurambura igihe cyo kumena umwenda wa Ag / PVA / PP wateguwe kuri 30 mM ya feza ya amoniya yagabanutseho 32.7% na 26.8%, (Ishusho 5d), ibyo bikaba bishobora kuba bifitanye isano no gutakaza bike kwa nanoparticles ya silver yabitswe nyuma yibi.
Igishushanyo cya 6a na b byerekana amafoto ya kamera yububiko bwa Ag / PVA / PP nigitambara cya Ag / PP nyuma yo gukaraba 0, 10, 20, 30, 40, na 50 kuri 30 mM ya feza ya amoniya. Imyenda yijimye Ag / PVA / PP nigitambara cya Ag / PP buhoro buhoro ihinduka imvi nyuma yo gukaraba; kandi ibara ryahindutse ryambere mugihe cyo gukaraba ntabwo bisa nkibikomeye nkibya kabiri. Mubyongeyeho, ugereranije nigitambara cya Ag / PP, ifeza yibikoresho bya Ag / PVA / PP byagabanutse buhoro nyuma yo gukaraba; nyuma yo koza inshuro 20 cyangwa zirenga, iyambere yagumanye ifeza irenze iyanyuma (Ishusho 6c). Ibi byerekana ko gukuramo fibre ya PP hamwe na PVA ishobora gutera imbere cyane guhuza Ag NPs kuri fibre ya PP. Igishushanyo cya 6d cyerekana amashusho ya SEM yimyenda ya Ag / PVA / PP nigitambara cya Ag / PP nyuma yo gukaraba 10, 40, na 50. Imyenda ya Ag / PVA / PP igira igihombo gike cya Ag NP mugihe cyo gukaraba kuruta imyenda ya Ag / PP, na none kuko PVA ikubiyemo igifuniko ifasha kunoza imiterere ya Ag NPs kuri fibre PP.
. . (c) Guhindura mubintu bya feza biri mubitambaro byombi murwego rwo gukaraba; (d) SEM amashusho yimyenda ya Ag / PVA / PP (1-3) na Ag / PP umwenda (4-6) nyuma yo gukaraba 10, 40 na 50.
Igicapo 7 cerekana ibikorwa bya antibacterial hamwe namafoto ya kamera ya digitale yimyenda ya Ag / PVA / PP irwanya E. coli nyuma yo gukaraba 10, 20, 30 na 40. Nyuma yo gukaraba 10 na 20, imikorere ya antibacterial yimyenda ya Ag / PVA / PP yagumye kuri 99,99% na 99,93%, byerekana ibikorwa byiza bya antibacterial. Urwego rwa antibacterial yimyenda ya Ag / PVA / PP yagabanutseho gato nyuma yinshuro 30 na 40 yo gukaraba, byatewe no gutakaza AgNPs nyuma yo gukaraba igihe kirekire. Nyamara, igipimo cya antibacterial yimyenda ya Ag / PP nyuma yo gukaraba 40 ni 80.16%. Biragaragara ko ingaruka za antibacterial yimyenda ya Ag / PP nyuma yo gukaraba 40 ari nke cyane ugereranije nigitambara cya Ag / PVA / PP.
(a) Urwego rwibikorwa bya antibacterial kurwanya E. coli. .
Igishushanyo cya 8 Igishushanyo cyerekana ibihimbano binini bya Ag / PVA / PP ukoresheje ibyiciro bibiri bizunguruka. Nukuvuga ko igisubizo cya PVA / glucose cyashizwe mumuzingo mugihe runaka, hanyuma kigakuramo, hanyuma kigaterwa hamwe nigisubizo cya amoniya ya silver muburyo bumwe kugirango ubone umwenda wa Ag / PVA / PP. (Isanamu 8a). Imyenda yavuyemo Ag / PVA / PP iracyafite ibikorwa byiza bya antibacterial nubwo byasigara umwaka 1. Kugirango hategurwe cyane imyenda ya Ag / PVA / PP, ibisubizo bya PP bitavanze byatewe mu buryo bukomeza hanyuma bizanyuzwa mu gisubizo cya PVA / glucose n'umuti wa amoniya wa feza bikurikiranye kandi bitunganywa. uburyo bubiri. Kumugereka. Igihe cyo gutera akabariro kigenzurwa no guhindura umuvuduko wikiziga, kandi umubare wibisubizo byamamajwe bigenzurwa no guhindura intera iri hagati yizingo (Igicapo 8b), bityo ukabona intego Ag / PVA / PP idoda idoda yubunini (cm 50 × 80 cm). ) hamwe no gukusanya. Inzira yose iroroshye kandi ikora neza, ifasha umusaruro munini.
Igishushanyo mbonera cy'umusaruro wibicuruzwa binini bigamije (a) nigishushanyo mbonera cyibikorwa byo kuzunguruka kugirango habeho ibikoresho bya Ag / PVA / PP bidafite imyenda (b).
Ifeza irimo PVA / PP idahimbano ikorwa hifashishijwe uburyo bworoshye bwo gutondekanya ibintu byamazi yoherejwe hamwe ninzira yo kuzunguruka. Ugereranije nigitambara cya PP nigitambara cya PVA / PP, imiterere yubukanishi bwimyenda yateguwe Ag / PVA / PP idoze idoze neza kuko igipande cya kashe ya PVA gishobora kunoza cyane guhuza Ag NPs na fibre PP. Byongeye kandi, ingano yipakurura ya PVA hamwe nibiri muri silver NPs muri Ag / PVA / PP imyenda idoda irashobora kugenzurwa neza muguhindura umurego wa PVA / glucose hamwe nigisubizo cya amoniya ya silver. By'umwihariko, Ag / PVA / PP imyenda idoda ikozwe hifashishijwe 30 mM ya silver ammonia yumuti yerekanaga imiterere myiza yubukanishi kandi igumana ibikorwa byiza bya antibacterial kurwanya E. coli na nyuma yo gukaraba 40, byerekana ubushobozi bwiza bwo kurwanya ikosa. PP ibikoresho bidoda. Ugereranije nandi makuru yubuvanganzo, imyenda twabonye dukoresheje uburyo bworoshye yerekanaga uburyo bwiza bwo gukaraba. Mubyongeyeho, imyenda yavuyemo Ag / PVA / PP idoda idoda ifite uburyo bwiza bwo gutembera neza no kwambara neza, bishobora koroshya ikoreshwa mubikorwa byinganda.
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Igihe cyo kohereza: Ugushyingo-26-2023