I-Hielscher Ultrasound Technology

I-Oxyde ye-Graphene – I-Ultrasonic Exfoliation nokusabalalisa

I-Graphene oxide i-soluble enamanzi, i-amphiphilic, ayinayo ubuthi, i-biodegradable futhi ingahlakazeka kalula kuma-colloids azinzile. Ukuxoshwa kwe-Ultrasonic kanye nokuhlakazeka kuyindlela ephumelela kakhulu, esheshayo futhi engabizi yokuhlanganisa, yokusabalalisa nokusabalalisa i-graphene oxide esikalini sezimboni. Ekucutshungweni osezansi komfula, abahlanzayo be-ultrasonic bakhiqiza ukusebenza okuphezulu kwe-graphene oxide-polymer composites.

I-ultrasonic Exfoliation ye-Graphene Oxide

Ukuze ulawule usayizi we-graphene oxide (GO) ama-nanosheets, indlela yokukhipha i-exfoliation idlala isici esiyinhloko. Ngenxa yemigomo yayo yokulawula ngokucophelela, i-ultrasonic exfoliation iyindlela yokusebenzisa i-delamination kakhulu yokukhiqizwa kwe-high quality graphene ne-graphene oxide.
Ukuze i-exfoliation ye-ultrasonic ye-graphene oxide esuka ku-graphite oxide izivumelwano ezihlukahlukene ziyatholakala. Thola incazelo eyodwa engezansi ngezansi:
I-graphite oxide powder ixubene ne-KOH ene-pH ne-value ye-pH 10. Ukuze uphenywe nokusabalalisa okulandelayo, uhlobo lwe-probe i-ultrasonicator UP200St (200W) isetshenziswa. Ngemuva kwalokho, i-K + ions ifakwe endizeni ye-baspen graphene ukudala inqubo yokuguga. Ukuguga kutholakala ngaphansi kokuphuma kwe-rotary (2 h). Ukuze ususe ama-K + i-K + excess, i-powder igezwa futhi ihlanganiswe ngezikhathi ezihlukahlukene.
Ingxube etholakalayo i-centrifuged futhi iqhwa-eyomile, ukuze i-powder-graphene oxide engasakazeki igwebe.
Ukulungiselela i-GO adhetive GO okunamathiselwe: I-graphene oxide powder ingahlakazeka ku-dimethylformamide (i-DMF) ngaphansi kwe-sonication ukuze kuvezwe unamathisela ophetheyo. (Han et al.2014)

I-7kW uhlelo lokusabalalisa lwe-ultrasonic lokukhiqizwa kwe-graphhene eline-inline (Chofoza ukuze ukhulise!)

Uhlelo lwe-Ultrasonic lwe-graphene oxide exfoliation

Isicelo solwazi




Qaphela kwethu Inqubomgomo yobumfihlo.


(I-Pic .: Potts et al. 2011)

I-Oxyde ye-Graphene – Ukuxhunyaniswa (i-Pic .: Potts nango-2011)

Ultrasonic Ukuhlakazeka kwe-Graphene Oxide

Ukusebenza kwe-Ultrasonic ye-Graphene Oxide

I-Sonication isetshenziswa ngokuphumelelayo ukufaka i-graphene oxide (GO) ibe yi-polymers kanye nezinhlanganisela.
Izibonelo:

  • i-graphene oxide-i-TiO2 i-microsphere composite
  • i-polystyrene-magnetite-graphene oxide composite (i-core-shell ehlelwe)
  • i-polystyrene yanciphisa izakhi ze-graphene oxide
  • i-polyaniline i-polystyrene ene-polystyrene / i-graphene oxide (i-PANI-PS / GO) igobolondo eliyisisekelo segobolondo
  • polystyrene-intercalated graphene oxide
  • p-phenylenediamine-4vinylbenzen-polystyrene eguquliwe i-graphene oxide
I-Graphene exfoliation ne-ultrasonic disperser UP400St

Izinhlelo ze-Ultrasonic ze-Graphene ne-Graphene Oxide

I-Hielscher Ultrasonics inikeza izinhlelo eziphezulu zamandla ultrasonic ze-exfoliation, ukusabalalisa kanye nokwehlisa phansi kwe-graphene ne-graphene oxide. Amaprosesa ase-ultrasonic anokwethenjelwa kanye nezigameko eziyinkimbinkimbi zanikeza amandla adingekayo, inqubo yokucubungula njenge-wel njenge-control eqondile, ukuze imiphumela ye-ultrasonic ihlelwe kahle kunenhloso yemigomo eyifunayo.
Enye yezinqubo ezibaluleke kunazo zonke yi-amplitude ye-ultrasonic, okuyinto yokwandisa nokunyakaza kwesiphakamiso se-ultrasonic. Hielscher's izinhlelo ze-industrial ultrasonic yakhelwe ukuletha ama-amplitudes aphakeme kakhulu. Amplitudes angafika ku-200μm angaqhutshwa ngokuqhubekayo ku-24/7 ukusebenza. Nge-amplitudes ephakeme nakakhulu, i-Hielscher inikeza ama-proso ultrasonic afakwe ngokwezifiso. Zonke izinqubo ze-ultrasonic zethu zingahle zilungiswe kahle ezimweni ezidingekayo zenqubo futhi zihlolwe kalula nge-software eyakhelwe ngaphakathi. Lokhu kuqinisekisa ukuthembeka okuphakeme kakhulu, ikhwalithi ehambisanayo kanye nemiphumela ephindaphindiwe. Ukuqina kwemishini ye-ultrasonic ye-Hielscher kuvumela ukusebenza komsebenzi we-24/7 emsebenzini obuthakathaka nasezindaweni ezinzima. Lokhu kwenza i-sonication ubuchwepheshe obukhiqizayo bokukhiqiza ukulungiswa okukhulu kwe-graphene, i-graphene oxide nempahla ye-graphitic.
Ukunikeza ububanzi bemikhiqizo yama-ultrasonicators nezesekeli (ezifana ne-sonotrodes nama-reactors anezilinganiso ezihlukahlukene kanye ne-geometries), izimo zokuphendula ezifanele kakhulu nezici (isib. Ama-reagents, i-ultrasonic energy input ivolumu ngalinye, ingcindezi, izinga lokushisa, izinga lokugeleza njll) okhethiwe ukuze uthole izinga eliphakeme kakhulu. Njengoba izinsimbi zethu ze-ultrasonic zingagonywa kuze kube yizinkulungwane ezingamakhulu ezinhlanu, i-sonication ye-pastes kakhulu ene-viscous ne-250,000 centipoise ayiyona inkinga kuma-Hielschers ama-ultrasonic systems.
Ngenxa yalezi zici, i-ultrasonic delamination / exfoliation kanye nokuhlakazeka kunezici ezijwayelekile zokuxuba nokukhwabanisa.

Xhumana nathi! / Cela Us!

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.


Hielscher Ultrasonics

  • amandla aphezulu
  • amabutho avela phezulu
  • izingcindezi eziphezulu ezisebenzayo
  • ukulawula okuqondile
  • ukusabalalisa okunamandla (okulinganayo)
  • batch futhi eqhubekayo
  • imiphumela ye-reproducible
  • ukuthembeka
  • ukuqina
  • ukusebenza kahle kwamandla

Izincwadi / Izinkomba



Amaqiniso Okufanele Ukwazi

I-Ultrasound ne-Cavitation: Yeka ukuthi i-Graphite i-Exfoliated kanjani ku-Graphene Oxyde ngaphansi kwe-Sonication

Ukukhipha i-ultrasonic ye-graphite oxide (GrO) kusekelwe ekhanda eliphakeme le-shear elibangelwa yi- i-acoustic cavitation. I-cavitation ye-Acoustic iphakama ngenxa yezingcindezi eziphakeme ezicindezelayo / eziphansi zomshoshaphansi, ezikhiqizwa ukuhlanganiswa kwamagagasi amakhulu anama-ultrasound ku-liquid. Ngesikhathi imijikelezo ephansi yokucindezela idala ama-voids amancane kakhulu noma amabhulovu avumayo, okukhula phezu kwemijikelezo ephansi engaphansi kokucindezela. Lapho ama-bubbles avulekile afinyelela usayizi lapho bengenakukwazi ukuthola khona amandla amaningi, awela phansi ngesihluku ngesikhathi somjikelezo ophezulu we-pressure. I-bubble implosion iholela emagodini okugcoba ama-cavitational kanye namagagasi okucindezela, ukushisa okwedlulele kuze kufike ku-6000K, amazinga okupholisa ngokweqile ngaphezu kwe-1010I-K / s, ukucindezelwa okukhulu kakhulu kuze kube ngu-2000, ukuhluka okucindezela ngokweqile kanye nama-jets e-liquid afika ku-1000km / h (~280m / s).
Lezo zithonya ezinamandla zithinta izinqolobane ze-graphite, ezihlanjululwa zibe yi-single-or-layer-layer-graphene oxide kanye nama-nanosheets amancane.

I-Oxyde ye-Graphene

I-ultrasonic exfoliation isetshenziselwa ukuhlanza ama-nanosheets e-graphite oxide ne-grayene-grayhene ambalwa.I-Graphene oxide (GO) isetshenziselwa ukukhipha i-graphite oxide (GrO). Ngenkathi i-graphite oxide iyinhlangano ye-3D ehlanganisa izigidi zezingxenye ze-graphene izendlalelo ezine-oxgens ezihlanganisiwe, i-graphene oxide iyi-graphhene e-mono- noma embalwa engqimba e-oksijini enhlangothi zombili.
I-graphene oxide ne-graphene ziyahlukahluka komunye nomunye kulezi zici ezilandelayo: i-graphene oxide i-polar, kanti i-graphene ayiyona inhlawulo. I-graphene oxide i-hydrophilic, kuyilapho i-graphene i-hydrophobic.
Lokhu kusho ukuthi i-graphene oxide iyinhlanganisela yamanzi, i-amphiphilic, engeyona enobuthi, i-biodegradable kanye namafomu okumiswa okuqinile kwe-colloidal. Ubuso be-graphene oxide luqukethe ama-epoxy, ama-hydroxyl, nama-carboxyl, atholakalayo ukuze ahlangane nama-cations nama-anion. Ngenxa yesakhiwo sabo esiyingqayizivele semvelo esiyingqayizivele nesakhiwo esiyingqayizivele, izingqungquthela ze-GO-polymer zinikeza amandla aphezulu okusebenza kwezimboni eziningi. (Tolasz et al. 2014)

Ukunciphisa i-Oxyde ye-Graphene

I-oxygen ye-graphene encishisiwe (rGO) ikhiqizwa yi-ultrasonic, amakhemikhali noma ukunciphisa okushisayo kwe-graphene oxide. Phakathi nesinyathelo sokunciphisa, iningi le-oksijeni esebenzayo ye-graphene oxide isuswe ukuze i-graphene oxide enciphise ifakwe (i-rGO) ibe nezici ezifanayo kakhulu ukuze i-graphene ecacile. Kodwa-ke, ukunciphisa i-graphene oxide (rGO) ayinasici futhi ilula njenge-graphene ehlanzekile.