I-Hielscher Ultrasound Technology

Umzila we-Green Sonochemical kuya eNanoparticles yesiliva

I-nanoparticles yesiliva (ama-AgNPs) ajwayele ukusetshenziselwa ama-nanomaterials ngenxa yezindawo zabo eziphikisana namagciwane, izindawo ezibonakalayo kanye nokuqhuba okuphezulu kagesi. Umzila we-sonochemical usebenzisa i-kappa carrageenan iyindlela elula, elula neyomvelo-friendly yokwenza ama-nano izinhlayiya zesiliva. I-κ-carrageenan isetshenziswa njenge-stabilizer yemvelo yemvelo, kuyilapho amandla e-ultrasound enza njenge-agent yokuncipha okuluhlaza.

Green Ultrasonic Synthesis of nanoparticles zesiliva

Elsupikhe et al. (2015) baye bahlakulela i-ultrasonically-assisted synthesis umzila wokuqala wokulungiselela ama-nanoparticles esiliva (AgNPs). I-Sonochemistry yaziwa kahle ngokugqugquzela ukuphendula okuningi kwamakhemikhali. I-Sonication inika amandla ukuhlanganisa ama-AgNP ne-κ-carrageenan njenge-stabilizer yemvelo. Ukusabela kugijima ekamelweni lokushisa futhi kuveza nanoparticles zesiliva nge fcc crystal structure ngaphandle kokungcola. Ukusabalalisa usayizi wezinhlayiyana ze-AgNPs kungathonywa ukuhlushwa kwe-κ-carrageenan.

I-green sonochemical synthesis ye-NP yesiliva. (Chofoza ukuze ukhulise!)

I-Scheme yokuxhumana phakathi kwamaqembu ahlaselwe ama-Ag-NP afakwe nge-κ-carrageenan ngaphansi kwe-sonication. [Elsupikhe et al. 2015]

Inqubo

    Ama-Ag-NP ahlanganiswa ngokunciphisa i-AgNO3 usebenzisa ultrasonication phambi kwe-κ-carrageenan. Ukuze uthole amasampuli ahlukene, ukumiswa okuyisihlanu kwakulungisiwe, ngokungeza u-10 ml we-0.1 M AgNO3 kuya ku-40-mL κ-carrageenan. Izixazululo ze-κ-carrageenan ezisetshenziswe zaziyi-0.1, 0.15, 0.20, 0.25, ne-0.3 wt%, ngokulandelana.
    Izixazululo zavuswa ngo-1h ukuthola i-AgNO3/ κ-carrageenan.
    Khona-ke, amasampula avulelwe ukuxiliswa okukhulu kwe-ultrasonic: I-amplitude yedivayisi ye-ultrasonic UP400S (400W, 24kHz) ibekwe ku-50%. I-Sonication isetshenziselwe i-90min ekamelweni lokushisa. I-sonotrode yamaphrosesa we-ultrasonic liquid UP400S wabhapathizwa ngqo kwisisombululo sokuphendula.
    Ngemuva kokubeletha, ukumiswa kwakuyi-centrifuged for 15min futhi yahlanza ngamanzi amabili okucwiliswa ama-distilled izikhathi ezine ukuze ususe isiliva se-ion esiliva. I-nanoparticles enqanyuliwe yayomisiwe ngo-40 ° C ngaphansi kokugcoba ngobusuku bonke ukuthola ama-Ag-NPs.

Ukulinganisa

  1. nH2O —Sonication–> + H + OH
  2. OH + RH –> R + H2O
  3. I-AgNo3–i-hydrolysis–> Ag + + CHA3
  4. R + Ag+ —> Ag ° + R’ + H+
  5. Ag+ + H –ukunciphisa–> Ag °
  6. Ag+ + H2O —> Ag ° + OH + H+

Ukuhlaziywa kanye nemiphumela

Ukuhlola imiphumela, amasampuli ahlaziywa ngukuhlaziywa okubonakalayo kwe-UV, i-X-ray diffraction, ukuhlaziywa kwamakhemikhali e-FT-IR, izithombe ze-TEM ne-SEM.
Inombolo yama-Ag-NP yanda ngokugxila kwe-κ-carrageenan. Ukwakhiwa kwe-Ag / κ-carrageenan kunqunywe yi-spectroscopy ebonakalayo ye-UV lapho ukuphakama kwe-plasmon ukuphakama kubonakala ku-402 kuya ku-420nm. Ukuhlaziywa kwe-X-ray diffraction (XRD) kubonise ukuthi i-Ag-NPs isakhiwo se-cubic ebusweni. I-spectrum ye-Fourier yashintsha i-infrared (FT-IR) ibonise ukuthi kukhona ama-Ag-NPs ku-κ-carrageenan. Isithombe se-Transmission electron microscopy (TEM) sokuhlushwa okuphezulu kakhulu kwe-κ-carrageenan kubonise ukusatshalaliswa kwama-Ag-NPs usayizi wezinhlayiya ezilinganiselwa ku-4.21nm. Iskrini se-electron microscopy (SEM) sichaza isimo se-Ag-NPs. Ukuhlaziywa kwe-SEM kubonisa ukuthi ngokukhushulwa kwe-κ-carrageenan okwandayo, izinguquko ebusweni buka-Ag / κ-carrageenan zenzeka, ukuze Ama-Ag-NP amancane amancane afane nesimo shlangothi zatholakala.

TEM izithombe ze-sonochemically zokwenziwa kwe-Ag / κ-carrageenan. (Chofoza ukuze ukhulise!)

Izithombe ze-TEM nokusabalalisa usayizi ohambisanayo we-ag / κ-carrageenan okwenziwe ngezakhi ezihlukahlukene ze-κ-carrageenan. [0.1%, 0.2%, no-0.3%, ngokulandelana (a, b, c)].

Synthesis Sonochemical of silver nanoparticles (AgNPs) ne ultrasonicator UP400S

I-Ag + / κ-carrageenan (kwesobunxele) ne-Ag / κ-carrageenan ene-sonicated (kwesokudla). I-Sonication yenziwa nge-UP400S nge-90min. [Elsupikhe et al. 2015]

Isicelo solwazi




Qaphela kwethu Inqubomgomo yobumfihlo.


I-UP400S i-homogenizer ye-ultrasonic (Chofoza ukuze ukhulise!)

UP400S – idivayisi ultrasonic esetshenziselwa synthesis sonochemical of Ag nanoparticles

SEM izithombe ze ultrasonically zokwenziwa isiliva nanoparticles (Chofoza ukuze ukhulise!)

Izithombe ze-SEM ze-Ag / κ-carrageenan ezingxenyeni ezahlukene ze-κ-carrageenan. [0.1%, 0.2%, no-0.3%, ngokulandelana (a, b, c)]. [Elsupikhe et al. 2015]

Xhumana Nathi / Cela Ukwaziswa Olwengeziwe

Khuluma nathi mayelana nezidingo zakho zokucubungula. Sizosikisela ukusetha nokulungiswa kwemingcele efanele yephrojekthi yakho.





Sicela uqaphele wethu Inqubomgomo yobumfihlo.




Ulwazi oluyisisekelo

Sonochemistry

Uma i-ultrasound enamandla isetshenziselwa ukusabela kwamakhemikhali kusixazululo (isimo se-liquid noma slurry), inikeza amandla okusebenza okusebenzayo ngenxa yesimo somzimba, esibizwa ngokuthi i-acoustic cavitation. I-cavitation idala amabutho aphezulu we-shear nezimo ezimbi kakhulu njengamazinga okushisa aphakeme kakhulu namazinga okupholisa, ukucindezela kanye nama-jet liquid. Lezi zinamandla ezinamandla zingabangela ukusabela futhi zibhubhise amandla anhlobonhlobo ama-molecule esigabeni samanzi. Ukuphendula okuningi kuyaziwa ukuthi kuzuzwa ku-ultrasonic irradiation, isib sonolysis, umzila we-sol-gel, synthesis sonochemical of i-palladium, i-latex, i-hydroxyapatite nezinye izinto eziningi. Funda kabanzi mayelana sonochemistry lapha!

Silver Nanoparticles

I-nano-particles yesiliva ibonakala ngobukhulu obuphakathi kuka-1nm no-100nm. Ngenkathi evame ukuchazwa ngokuthi 'isiliva’ ezinye ziqukethe amaphesenti amakhulu e-silver oxide ngenxa yobukhulu bawo bama-athomu esiliva phezulu. I-nanoparticles yesiliva ingavela ngezakhiwo ezahlukene. Ngokuvamile, ama-nanoparticles esiliva ayingqimba ayakhiwa, kepha idayimane, ama-octagonal kanye namashidi amancane nawo asetshenzisiwe.
I-nanoparticles yesiliva ijwayele kakhulu kwizicelo zezokwelapha. Ions zesiliva ziyi-bioactive futhi zinezici ezinamandla zokulwa namagciwane kanye ne-germicidal. Indawo yabo enkulu kakhulu ivumela ukuhlanganiswa kwemigqa eminingi. Ezinye izici ezibalulekile ukuqhuba kanye nezakhiwo eziyingqayizivele ze-optical.
Ngezici zabo zokuziphatha, ama-nanoparticles esiliva avame ukuhlanganiswa ezingxenyeni, amaplastiki, ama-epoxies nama-adhesive. Izinhlayiya zesiliva zanda ukwenziwa komshini kagesi; ngakho-ke ama-pastes esiliva nama-inks avame ukusetshenziswa ekukhiqizeni i-electronics. Njengoba i-nanoparticles yesiliva isekela phezulu amaplasmoni, ama-AgNPs anempahla evelele ye-optical. Ama-nanoparticles wesiliva e-Plasmonic asetshenziselwa izinzwa, izimboni kanye nemishini yokuhlaziya njenge-Surface Enhanced Raman Spectroscopy (SERS) ne-Surface Plasmon Sprostracic Spluroscence (SPFS) ebizwa nge-Field Plasmon Field.

I-Carrageenan

I-Carrageenan iyi-polymer yemvelo engabizi, etholakala ezinhlobonhlobo zezinhlanzi ezibomvu zasolwandle. Ama-Carrageenans angama-polysaccharide e-sulphated e-sarfine ajwayelekile asetshenziselwa kakhulu embonini yokudla, ngenxa yokugaya, ukuqina nokuqinisa izindawo. Isicelo sabo esiyinhloko sisemikhiqizo yobisi nemikhiqizo, ngenxa yokubopha kwabo okuqinile emaprotheni okudla. Kunezinhlobo ezintathu eziyinhlobonhlobo ze-carrageenan, ezihlukile ngezinga lazo lokubulala. I-Kappa-carrageenan ineqembu elilodwa le-sulphate ngalinye elingavumelekile. I-Iota-carrageenan (i-carrageenen) inezinhlaka ezimbili ze-sulfathi ngayinye. I-Lambda carrageenan (λ-carrageenen) inezinhlaka ezintathu ze-disaccharide ngayinye.
I-Kappa carrageenan (i-κ-carrageenan) inesakhiwo esihambisanayo se-polysaccharide esakhiwe nge-D-galactose ne-3,6-anhydro-D-galactose.
I-κ- carrageenan isetshenziselwa kabanzi embonini yokudla, isib. njenge-agel agent kanye nokuguqulwa kokuthutha. Ingatholakala njengokwengeza ku-ayisikhilimu, ukhilimu, ushizi we-cottage, ukushaywa ubisi, ukugqoka isaladi, amakhekhe aphethwe yisiphuzo, ubisi lwe-soy & nezinye izimbiza zezitshalo, namasoso ukwandisa i-viscosity yomkhiqizo.
Ngaphezu kwalokho, i-κ-carrageenan ingatholakala kwimikhiqizo engewona ukudla njenge-thickener ekuhlanjeni imithi kanye nezikhwama zezitho zomzimba, kumathambo wokugcoba (njengesiqiniseko sokuvimbela izakhiwo ezihlukanisayo), i-foam yokulwa nomlilo (njengoba i-thickener yenza ubumpofu bubambeke), ama-gel , isihlangu se-polish (ukwandisa i-viscosity), ku-biotechnology ukuvimbela amaseli / ama-enzyme, emithini yemithi (njenge-excipient engasebenzi emaphilisi / amaphilisi), kokudla kwesilwane njll.