Ukuqothulwa kwamanzi okususelwa emanzini

Ukukhishwa kwe-Ultrasonic kuvumela ukukhiqiza i-graphene enezingqimba ezimbalwa ngaphandle kokusebenzisa ama-solvents anokhahlo kusetshenziswa amanzi amsulwa kuphela. I-sonication enamandla amakhulu ihlanza amashidi e-graphene ngaphakathi kokwelashwa okufushane. Ukugwema izinyibilikisi kuguqula ukukhishwa kwe-graphene kunqubo eluhlaza, eqhubekayo.

Ukukhiqizwa kweGraphene nge-Liquid Phase Exfoliation

Ultrasonic disperser UIP4000hdT for commercial graphene exfoliation in continuous flowIGraphene yenziwa ngezebhizinisi ngokwenza lokho okuthiwa yi-liquid phase exfoliation. Ukukhishwa kwesigaba sikaketshezi kwe-graphene kudinga ukusetshenziswa kwamakhemikhali awuketshezi anobuthi, ayingozi emvelweni, futhi abizayo, asetshenziswa njengokwelashwa ngaphambi kwamakhemikhali noma ngokuhlangana / ngenqubo yokusabalalisa yomshini. Ngokusatshalaliswa kwamashidi e-graphene, i-ultrasonication isungulwe njengenqubo ethembeke kakhulu, esebenza kahle futhi ephephile ukukhiqiza amashidi we-graphene asezingeni eliphakeme kakhulu ngobuningi bezinga lezimboni ngokuphelele. Njengoba ukusetshenziswa kwamakhemikhali awuketshezi abukhali kuhlala kuhambisana nezindleko, ukungcoliswa, ukususwa nokulahlwa okuyinkimbinkimbi, ukukhathazeka ngokuphepha kanye nomthwalo wezemvelo, enye indlela engeyona enobuthi nephephe kakhulu inenzuzo enkulu. Ukukhishwa kweGraphene usebenzisa amanzi njenge-solvent kanye ne-ultrasound yamandla wokukhipha imishini amashidi ambalwa we-graphene ngakho-ke kuyindlela ethembisayo yokwenziwa kwe-graphene eluhlaza.
Amakhemikhali awuketshezi avamile, avame ukusetshenziswa njengesigaba esingamanzi ukusabalalisa ama-nanosheets e-graphene, afaka iDimethyl sulfoxide (DMSO), N, N-dimethylformamide (DMF), N-methyl-2-pyrrolidone (NMP), Tetramethylurea (TMU), Tetrahydrofuran (THF ), I-propylene carbonateacetone (PC), i-ethanol, ne-formamide.
Njengendlela esivele isungulwe isikhathi eside yokukhishwa kwe-graphene ngezinga lezebhizinisi, i-ultrasonication inika amandla ukukhiqiza i-graphene esezingeni eliphakeme yokuhlanzeka okuphezulu ngezindleko eziphansi. Njengoba ukukhishwa kwe-graphene kwe-ultrasonic kungalinganiswa ngokuphelele kunoma yiliphi ivolumu, isivuno sokukhiqizwa kwama-flaphene flakes asezingeni eliphakeme singenziwa kalula ekukhiqizweni kwe-graphene.

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Qaphela kwethu Inqubomgomo yobumfihlo.


Ultrasonic disperser UIP2000hdT, a 2000 watts powerful sonic system, for graphene exfoliation and dispersion.

I I-UIP2000hdT i-2kW i-disperser enamandla ye-ultrasonic yokuqothula i-graphene nokusabalalisa.

Ukukhishwa kwe-Ultrasonic kweGraphene emanzini

UTyurnina et al. (2020) uphenye imiphumela yokuqina kwe-amplitude kanye ne-sonication kuzixazululo ezihlanzekile zamanzi-grafite kanye nokukhishwa kwe-graphene. Esifundweni, basebenzise iHielscher UP200S (200W, 24kHz). Ukukhishwa kwe-Ultrasonic kusetshenziswa amanzi kusetshenziswe njengenqubo yesinyathelo esisodwa yezingqimba ezimbalwa ze-graphene delamination. Ukwelashwa okufishane kwe-2h kwakwanele ukukhiqiza i-graphene enezingqimba ezimbalwa kusethaphu le-beaker sonication evulekile.

Ultrasonic graphene exfoliation in water

Ukulandelana kwejubane elikhulu (kusuka ku-a kuya ku-f) kozimele ababonisa ukukhishwa kwe-sono-mechanical ye-graphite flake emanzini kusetshenziswa ama-UP200s, i-24 kHz ultrasonicator ene-3-mm sonotrode. Imicibisholo ikhombisa indawo yokuqhekeka (ukukhishwa) ngamabhamuza e-cavitation angena ekuhlukaneni.
© UTyurnina et al. 2020 (I-CC BY-NC-ND 4.0)

Ukusebenziseka kahle kwe-Ultrasonic Graphene Exfoliation

Iprosesa ye-ultrasonic UP200St ene-sonotrode ne-ground glass ingxenye.Ukusetha kwe-ultrasonic okusetshenziswe nguTyurnina et al. (2020) ingenziwa kalula ukuze isebenze kahle futhi isuswe ngokushesha ngokusebenzisa i-reactor evaliwe ye-ultrasonic kwimodi yokugeleza. Ukwelashwa kwe-Ultrasonic emugqeni kuvumela ukwelashwa okufana nokufana kakhulu kwe-ultrasonic kwayo yonke impahla eluhlaza ye-graphite: ukondla isisombululo se-graphite / samanzi ngqo esikhaleni esivinjelwe se-ultrasonic cavitation, yonke i-graphite iba i-sonicated ngokufanayo okuholela ekukhiqizweni okuphezulu kwama-graphene flakes.
Amasistimu we-Hielscher Ultrasonics avumela ukulawula okuqondile phezu kwazo zonke izinhlaka ezibalulekile zokucubungula ezinjenge-amplitude, isikhathi / ukugcinwa, ukufaka amandla (Ws / mL), ingcindezi, nokushisa. Ukusetha amapharamitha we-ultrasonic amakhulu kubangela isivuno esiphezulu, ikhwalithi nokusebenza kahle okuphelele.

Ingabe i-Ultrasonication ikukhuthaza kanjani ukukhishwa kweGraphene

Lapho amagagasi e-high-power ultrasound ahlanganiswa nesilayidi se-graphite powder namanzi noma iyiphi i-solvent, amandla we-sonomechanical anjenge-shear ephezulu, iziphithiphithi ezinamandla kanye nengcindezi ephezulu kanye nokwehluka kwamazinga okushisa kudala izimo ezinamandla. Lezi zimo ezinamandla amakhulu ziwumphumela wesimo se-acoustic cavitation. Funda kabanzi mayelana ne-ultrasonic cavitation lapha!
I-power ultrasound iqala ukunwetshwa kwe-graphite powder, ngoba uketshezi luyacindezelwa phakathi kwezingqimba ze-graphene, okwakhiwa i-graphite yayo. Amandla we-shear ultrasonic ahlanza amashidi owodwa we-graphene bese ewasabalalisa njengama-flaphene flakes kwisisombululo. Ukuthola ukuqina kwesikhathi eside kwe-graphene emanzini, umuntu osebenza ngokuthintekayo uyadingeka.

i-ultrasonicator UP200St (200W) kuhlakazeka amashidi e-graphene

Isicelo solwazi




Qaphela kwethu Inqubomgomo yobumfihlo.


Ama-Ultrasonicators Wokusebenza Okuphezulu weGraphene Exfoliation

Izici ezihlakaniphile zama-Hielscher ultrasonicators zenzelwe ukuqinisekisa ukusebenza okuthembekile, imiphumela yokuzala kanye nobungani bomsebenzisi. Amasethingi wokusebenza angafinyeleleka kalula futhi ashayelwe ngemenyu enembile, engatholakala nge-digital color touch-display nange-remote control yesiphequluli. Ngakho-ke, zonke izimo zokucubungula ezinjenge-net energy, amandla aphelele, i-amplitude, isikhathi, ingcindezi nokushisa kuqoshwa ngokuzenzakalela ekhadini le-SD elakhelwe ngaphakathi. Lokhu kukuvumela ukuthi ubuyekeze futhi uqhathanise ama-sonication wangaphambilini futhi ukwandise inqubo yokukhishwa kwe-graphene ekusebenzeni okuphezulu kakhulu.
Hielscher's industrial processors of the hdT series can be comfortable and user-friendly operated via browser remote control.Izinhlelo ze-Hielscher Ultrasonics zisetshenziswa emhlabeni wonke ekwenzeni amashidi aphezulu we-graphene nama-graphene oxides. Ama-ultrasonicators ezimboni zeHielscher angasebenza kalula ama-amplitudes aphezulu ngokuqhubeka nokusebenza (24/7/365). Amplitudes angafika ku-200µm angenziwa kalula ngokuqhubekayo ngama-sonotrode ajwayelekile (ama-ultrasonic probes / izimpondo kanye cascatrodesTM). Ngama-amplitudes aphakeme kakhulu, ama-sonotrode e-ultrasonic enziwe ngokwezifiso ayatholakala. Ngenxa yokuqina nokugcinwa kwabo okuphansi, izinhlelo zethu ze-ultrasonic exfoliation zivame ukufakwa kuzicelo zomsebenzi osindayo nasezindaweni ezifuna kakhulu.

Amaprosesa we-Hielscher ultrasonic we-graphene exfoliation asevele efakiwe emhlabeni wonke ngezinga lokuhweba. Xhumana nathi manje ukuxoxa ngenqubo yakho yokukhiqiza i-graphene! Abasebenzi bethu abanolwazi oluningi bazokujabulela ukwabelana ngolwazi oluthe xaxa ngenqubo yokukhishwa kwamafutha, izinhlelo ze-ultrasonic kanye namanani entengo!

Ithebula elingezansi linikeza isibonakaliso somthamo wokucubungula we-ultrasonicators wethu:

Iqoqwana Ivolumu flow Rate Amadivayisi ezinconyiwe
1 kuya ku-500mL 10 kuya ku-200mL / min UP100H
10 kuya ku-2000mL 20 kuya ku-400mL / min UP200Ht, UP400St
0.1 kuya ku-20L 0.2 kuya ku-4L / min I-UIP2000hdT
10 kuya ku-100L 2 kuya ku-10L / iminithi I-UIP4000hdT
na 10 kuya ku-100L / iminithi UIP16000
na sikhulu yinhlanganisela UIP16000

Xhumana nathi! / Cela Us!

Cela ulwazi oluthe xaxa

Uyacelwa ukuthi usebenzise ifomu elingezansi ukucela ulwazi olungeziwe mayelana nezinhlelo zokusebenza ze-ultrasonic, izinhlelo zokusebenza nentengo. Sizokujabulela ukuxoxa ngenqubo yakho nawe futhi sikunikeze uhlelo lwe-ultrasonic oluhlangabezana nezidingo zakho!









Sicela uqaphele wethu Inqubomgomo yobumfihlo.


Ultrasonic high-shear homogenizers are used in lab, bench-top, pilot and industrial processing.

I-Hielscher Ultrasonics ikhiqiza ama-homogenizers asebenza ngokusebenza okuphezulu wokuxuba izinhlelo, ukusabalalisa, ukumisa nokukhipha ilebhu, umshayeli kanye nesikali sezimboni.

Izincwadi / Izikhombo

  • U-Anastasia V. Tyurnina, Iakovos Tzanakis, Justin Morton, Jiawei Mi, Kyriakos Porfyrakis, Barbara M. Maciejewska, Nicole Grobert, Dmitry G. Eskin (2020): Ukukhishwa kwe-Ultrasonic kwe-graphene emanzini: Isifundo sepharamitha esibalulekile. ICarbon Vol. 168, 2020. 737-747.
    (Kutholakala ngaphansi kwe-Creative Commons Attribution 4.0: CC BY-NC-ND 4.0. Bona imigomo ephelele lapha.)
  • Štengl V., Henych J., Slušná M., Ecorchard P. (2014): Ukukhishwa kwe-Ultrasound kokufaniswa okungahleliwe kwe-graphene. Izincwadi Zokucwaninga ZaseNanoscale 9 (1), 2014.
  • I-Unalan IU, i-Wan C., i-Trabattoni S., i-Piergiovannia L., i-Farris S. (2015): I-polysaccharide esisizwa ngokuphuthumayo ngokushesha kwama-graphite platelets ibe ngamakhredithi aphezulu angenawo amanzi. Ukuthuthukiswa kwe-RSC 5, 2015. 26482-26490.
  • Bang, JH; Suslick, KS (2010): Izicelo ze-Ultrasound kuya ku-synthesis of Materials Nanostructured. Izinto ezithuthukisiwe 22/2010. k. 1039-1059.
  • Stengl, V .; I-Popelková, D.; Vlácil, P. (2011): TiO2-Graphene Nanocomposite njenge-High Performance Photocatalysts. Ku: Journal of Physical Chemistry C 115/2011. iphe. 25209-25218.



Amaqiniso Okufanele Ukwazi

I-Graphene

Ishidi le-graphene I-Graphene i-monolayer ye-sp2ama-athomu e-carbon. I-Graphene inikeza izici ezibonakalayo ezibonakalayo njengendawo enkulu engavamile engaphezulu (2620 m2g-1), izakhiwo eziphambili ze-mechanical ne-Young's modulus ye-TPa kanye namandla angaphakathi ka-130 GPa, ukuqhutshwa kwe-elekthronikhi ephakeme ngokweqile (ukuhamba kwamakamelo okushisa ama-2.5 × 105 cm2 V-1s-1), conductivity eliphezulu kakhulu (ngaphezu kuka 3000 W m K-1), ukubiza izakhiwo ezibaluleke kakhulu. Ngenxa yezinto zayo eziphakeme, i-graphene isetshenziswe kakhulu ekuthuthukiseni nasekukhiqizweni kwamabhethri asebenza kahle, amaseli kagesi, amangqamuzana elanga, i-supercapacitor, i-hydrogen storages, izihlangu zamagesi namadivayisi kagesi. Ngaphezu kwalokho, i-graphene ihlanganiswa nanocomposites amaningi nezinsimbi ezihlanganisiwe njengokuqinisa isithasiselo, isib. Ku-polymers, i-ceramics ne-metal matrices. Ngenxa yokuqhutshwa kwayo okuphezulu, i-graphene iyisici esibalulekile samapayipi asebenzayo nama-inks.
Ukushesha nokuphephile Ukulungiselela i-ultrasonic ye-graphene engenalutho ngokwezimali ezinkulu ngezindleko eziphansi kuvumela ukwandisa izicelo ze-graphene ezimbonini eziningi.
I-Graphene ingqimba elincane le-carbon, elingachazwa njenge-single-layer noma i-2D isakhiwo se-graphene (ungqimba olulodwa lwe-graphene = SLG). I-Graphene inendawo engavamile kakhulu futhi izakhiwo eziphakeme kakhulu (I-Young's modulus ye-TPa neamandla angaphakathi ka-130 GPa), inikeza ukuqhuba kahle kwe-elektroniki nokushisa, ukushayela ukuhamba kwezokuthutha, ukukhanya, nokungahambisani namagesi. Ngenxa yalezi zimpawu zezinto ezibonakalayo, i-graphene isetshenziselwa ukuqinisa isithasiselo sokunikeza izingqikithi amandla ayo, ukuqhuba, njll. Ukuze uhlanganise izici ze-graphene nezinye izinto zokwakha, i-graphene kufanele isakazwe ku-compound noma isetshenziswe njengesembozo se-thin-film ungene kwi-substrate.


Hielscher Ultrasonics supplies high-performance ultrasonic homogenizers from lab to industrial size.

Ukusebenza okuphezulu kwe-ultrasonics! Uhla lomkhiqizo kaHielscher lumboza isibonisi esigcwele kusuka ku-compact lab ultrasonicator ngaphezulu kwamayunithi ebhentshini-phezulu kuya ezinhlelweni ezigcwele zezimboni ze-ultrasonic.