I-Hielscher Ultrasound Technology

Ukukhishwa kwe-ultrasonic kwe-Water-Dispersible Graphene

  • I-Mono- ne-bi-layer ye-graphene nanosheets ingakhiqizwa ngokushesha nge-exfoliation ye-ultrasonic nge-throughput esezingeni eliphezulu nasezindleko eziphansi.
  • I-ultrasonically exfoliated graphene ingenziwa ukusebenza nge-biopolymers ukuze uthole i-graphene yamanzi engahlakazeki.
  • Nge-cavitation ye-ultrasonic, i-graphene yokwenziwa komsebenzi ingaqhutshwa phambili ibe yindawo ehlakazekile emanzini asekelwe.

 

I-ultrasonic Exfoliation ye-High-Quality Graphene

I-ultrasonication iyindlela enokwethenjelwa yokukhiqiza izingqimba ze-graphene (i-mono-, i-bi- kanye ne-layer-layer-graphene) kusuka kuma-flakes ama-flakes noma izinhlayiya. Nakuba ezinye izindlela ezijwayelekile zokuqothula njengama-ball- ne-roll roll noma ama-mixer aphezulu ahlanganiswa nekhwalithi ephansi kanye nokusetshenziswa kwama-reagents nama-solvents, i-ultrasonic exfoliation indlela eqinisekisayo ngokuphuma kwayo kwekhwalithi ephezulu, ukukhishwa kwenqubo ephezulu kanye nezimo zokucubungula kahle.
cavitation ultrasonic idala amandla amakhulu e-shear, ahlukanisa izitha ze-graphite ezibekiwe zibe mono-, bi- futhi ezimbalwa-izingqimba ze-graphene ezingenalutho.

AmaSpredishithi aseGraphene ahlakazeka ngamanzi

Ngaphansi kwezimo ezivamile, i-graphene ayinasakazeka kalula emanzini futhi ifaka ama-aggregates nama-agglomerate uma ehlakazeka emkhatsini we-medium. Njengoba amasu aqueous anezinzuzo eziphawulekayo zokungabizi kakhulu, okungezona ezinobuthi, ezemvelo, ezinamanzi-based based graphene izinhlelo zikhangisa kakhulu abakhiqizi be-graphene nomkhakha ophansi.
Ukuze uthole ama-nanosheet, a-ultrasonically exfoliated nanosheets, alungiswa nge-polysaccharides / biopolymers njenge-pullulan, i-chitosan, i-alginate, i-gelatine noma i-gum arabic.

Izinzuzo:I-Graphene exfoliation ne-ultrasonic disperser UP400St

  • high quality graphene
  • isivuno high
  • ukuhlakazeka kwamanzi
  • ukuhlushwa okukhulu
  • ukusebenza kahle
  • inqubo esheshayo
  • izindleko eziphansi
  • i-high-passput
  • ukuphathwa kwemvelo
I-7kW uhlelo lokusabalalisa lwe-ultrasonic lokukhiqizwa kwe-graphhene eline-inline (Chofoza ukuze ukhulise!)

Uhlelo lwe-Ultrasonic lwe-graphene exfoliation

Isicelo solwazi




Qaphela kwethu Inqubomgomo yobumfihlo.


I-Protocol ye-Exfoliation eqondile ye-Graphite

I-non-ionic pullulan ne-alginate ye-anionic (i-1.0 g) yahlukaniswa ngokwehlukana ku-20 ml wamanzi a-distilled (i-DI), kanti i-cationic chitosan (0.4 g) yaqedwa ngo-20 ml we-DI nge-1 wt% acetic acid. I-graphite powder yahlakazeka ngezixazululo eziphilayo ze-biopolymer futhi iphathwa ngokusebenzisa i-a iprosesa ye-ultrasonic UP200S (amandla angaphezu kuka-200 W, imvamisa 24 kHz, i-Hielscher Ultrasonics, eJalimane) eneziqu ze-cone frustum i-titot sonotrode (i-tip micro tip S3, ububanzi be-tip 3 mm, ubukhulu bamamitha angu-210m, ubukhulu bamandla obukhulu noma ububanzi bomhlaba 460 W cm-2) ngaphansi kwezimo ezilandelayo: 0.5 umjikelezo kanye no-50% amplitude, isikhathi esiyi-10, 20, 30, no-60, ngokulandelana. Imiphumela emihle yatholakale ku-30min sonication. I-Sonication isetshenzisiwe ngamandla ka-16.25 W imizuzu engama-30, ngokusetshenziswa kwamandla (amandla okukhipha ngeyunithi ngayinye) ka-731 Ws ml-1.
Ngemuva kwalokho, ukuxubana kwakusungulwe nge-1500 rpm ngamaminithi angu-60 ukususa izinhlayiya ze-graphite ezingaxhunyiwe futhi kwahlanza izikhathi ezingu-5 ku-5000 rpm ngeminithi engu-20 ukususa ama-biopolymers ngokweqile. Izixazululo ezimnyama eziphumela emgodini zagesi zimile-40 ° C kuze kube yilapho kungekho-ukulahleka okukhulu. I-polymeri-graphene powders eyabangelwa yabuye yavuselelwa emanzini (1 mg ml-1 for pullulan kanye chitosan; 0.18 mg ml-1 ngokuba i-alginate) yokwenza izibalo. Ama-graphene amashidi atholakala yi-pullulan-, alginate-, ne-chitosan-aided ultrasonication aboniswe njenge-pull-G, i-alg-G, ne-chit-G ngokulandelanayo.
Kulezi zinhlelo ezintathu, i-pullulan ne-chitosan zaziphumelela kakhulu ekukhuliseni i-graphite kune-alginate. Le ndlela yanikeza ama-mono-, bi-, namaqabunga ambalwa-graphene amashidi aneziphambeko eziphansi kuphela ezingemuva. Ukuhlungwa kwe-biopolymers kwi-graphene surface kunikeza ukuzinza okuhlala njalo (ngaphezu kwezinyanga ezingu-6) kokuhlakazeka okunamandla.
(Unal et al 2015)

Ukukhishwa kwe-ultrasonic yamanzi-ama-nanosheets ahlakazekayo (i-Unalan et al. 2015)

TEM images of pull-G for: (a) iminithi 10; (b) iminithi engu-20; (c) 30 iminithi; (d) iminithi engama-60; (e) chit-G ngamaminithi angu-30; (f) i-alg-G ngamaminithi angu-30. (Unal et al 2015)

Izinhlelo ze-Ultrasonic

Amaprosesa ase-Hielscher aphezulu-ultrasonic asetshenziselwa umhlaba wonke ukuphumelela kokuphumelela nokusabalalisa kwe-graphite ne-graphene. Abahlakazeli bethu be-ultrasonic bayatholakala ematheni nasebhentshini-phezulu kuze kube yizikhungo zokukhiqiza ezimbonini ezigcwele. Ngaphandle kokuqina, ukusebenza kwe-24/7 nokugcinwa okuphansi, ama-ultrasonicators ama-Hielscher akhuthaza ngokukhululeka okukhulu kokucubungula nokulingana okulinganayo.
Izinqubo zingabuyekezwa kalula futhi zenziwe kahle ebhodini. Ngemuva kwalokho, yonke imiphumela yokucubungula ingafakwa ngokulingana ngokuphelele nezinga lokukhiqiza ezentengiselwano. Lokhu kwenza i-sonication ibe indlela ephumelelayo yokukhiqiza yevolumu ephakeme yamashidi aphezulu we-graphene.
Hielscher Ultrasonics’ ama-processor ultrasonic ama-industriel angaletha ama-amplitudes aphakeme kakhulu. Amplitudes angafika ku-200μm angaqhutshwa ngokuqhubekayo ku-24/7 ukusebenza. Nge-amplitudes ephakeme nakakhulu, i-sonotrode e-ultrasonic eyenziwe ngezifiso iyatholakala. Ukulinganisa amakhemikhali e-ultrasound ukuqinisekisa ukuthi amandla okukhiqizwa okukhulu okuphephile nokuphephile kwama-nanosheets ephezulu wekhwalithi ye-graphene.

I-ultrasonic disperser iyatholakala kusuka kudivayisi encane egcinwe ngesandla kuze kube yilabhenki-phezulu kanye nezimo ezigcwele zezimboni ze-ultrasonic zokucubungula ivolumu enkulu (Chofoza ukuze ukhulise!)

Ama-homogenizers ama-ultrasonic high-power ama-ultrasonic atholakalayo kunoma iyiphi inqubo yesilinganiso – kusuka ebhodini kuya ekukhiqizeni.

Ukuqina kwemishini ye-ultrasonic ye-Hielscher kuvumela ukusebenza komsebenzi we-24/7 emsebenzini obuthakathaka nasezindaweni ezinzima.
Ithebula elingezansi linikeza isibonakaliso somthamo wokucubungula we-ultrasonicators wethu:

Iqoqwana Ivolumu flow Rate Amadivayisi ezinconyiwe
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 UIP4000
na 10 kuya ku-100L / iminithi UIP16000
na sikhulu yinhlanganisela UIP16000

Cela ulwazi oluthe xaxa

Sicela usebenzise ifomu elingezansi, uma ufisa ukucela ulwazi oluthe xaxa mayelana ne-homogenization yama-ultrasonic. Sizojabula ukukunikeza uhlelo lwe-ultrasonic ukuhlangabezana nezidingo zakho.









Sicela uqaphele wethu Inqubomgomo yobumfihlo.


Izincwadi / Izinkomba

  • 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.


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.