Imọ-ẹrọ olutirasandi Hielscher

Ẹtọ CNT ti a tuka nipasẹ Ultrasonication

Lati lo nilokulo awọn iṣẹ iyasọtọ ti awọn nanotubes erogba (CNTs), wọn gbọdọ wa ni isọnmọ ni ọna kanna.
Awọn olutipalẹ Ultrasonic jẹ ohun elo ti o wọpọ julọ lati kaakiri awọn CNT sinu awọn ifura orisun ati epo-igbẹkẹle.
Imọ-ẹrọ fifa ultrasonic n ṣẹda agbara rirẹ-kuru to ga lati ṣe aṣeyọri pipin ti CNT laisi iparun wọn.

Pipasẹ ti ultrasonic ti Erogba Nanotubes

Sonication ti o ni agbara pẹlu ẹrọ-Iru ultrasonicator. (Tẹ lati tobi!)Erogba nanotubes (CNTs) ni ipin ipin ti o ga pupọ ati ṣafihan iwuwo kekere bi daradara bi agbegbe agbegbe titobi pupọ (ọpọlọpọ awọn ọgọrun m2 / g), eyiti o fun wọn ni awọn ohun-ini alailẹgbẹ bii agbara fifẹ giga giga, lile, ati lile ati pupọ ina mọnamọna ati iṣẹ iba ina mọnamọna ga. Nitori awọn ipa Van der Waals, eyiti o ṣe ifamọra awọn ẹyọ nanotubes carbon (CNTs) si ara wọn, CNT ṣe eto deede ni awọn edidi tabi awọn iṣan. Awọn ipa intermolecular wọnyi ti ifamọra da lori ohun iyasọtọ acking-bond stacking larin awọn nanotubes nitosi ti a mọ si π-stacking. Lati ni anfani kikun lati awọn nanotubes erogba, agglomerates wọnyi gbọdọ wa ni ipinya ati pe a gbọdọ pin pinpin CNT ni boṣeyẹ ni pipinka isodipọ kan. Intense ultrasonication ṣẹda cavitation acoustic ninu awọn olomi. Nitorinaa ti ipilẹṣẹ rirẹ-kuru agbegbe ti fọ awọn apejọ CNT ati fọn wọn ni iṣọkan ni idaduro isọdọkan. Imọ-ẹrọ fifa ultrasonic n ṣẹda agbara rirẹ-kuru to ga lati ṣe aṣeyọri pipin ti CNT laisi iparun wọn. Paapaa fun sonication SWNTs sonication ti wa ni ifijišẹ loo lati disentangle wọn leyo. Ultrasonication kan nṣe idamu ipele ti o to lati ṣe iyasọtọ awọn akopọ SWNT laisi nfa fifọ pupọ si awọn nanotubes kọọkan (Huang, Terentjev 2012).

Awọn anfani ti Itanna Ultrasonic CNT

  • Awọn CNT ti o tuka
  • Yiyalo kaakiri
  • Agbara pipinka pupọ
  • Awọn ẹru CNT giga
  • Ko si ibajẹ CNT
  • ṣiṣe fifẹ
  • ilana iṣakoso gangan
UIP2000hdT - 2kW ultrasonicator fun awọn pipinka awọn erogba nanotubes.

UIP2000hdT – Ultrasonicator alagbara 2kW fun awọn itankale CNT

Ibere ​​Alaye




Akiyesi wa Ìpamọ Afihan.


Awọn ohun elo Igbara-iṣẹ Ultra-giga fun Awọn ifunni CNT

Hielscher Ultrasonics pese awọn ohun elo ultrasonic ti o lagbara ati ti o gbẹkẹle fun pipinka daradara ti awọn CNT. Boya o nilo lati mura awọn ayẹwo CNT kekere fun onínọmbà ati R&D tabi o ni lati ṣe iṣelọpọ ọpọlọpọ awọn fifin awọn ọja pupọ, Iwọn ọja Hielscher nfun eto ultrasonic to dara julọ fun awọn ibeere rẹ. Lati 50W ultrasonicators fun lab to Awọn sipo ultrasonic 16kW fun iṣelọpọ iṣowo, Hielscher Ultrasonics ti bo.
Lati gbe awọn pipinka erogba nanotube ti o ni agbara giga, awọn ilana ilana gbọdọ wa ni iṣakoso daradara. Iwọn titobi, iwọn otutu, titẹ ati akoko idaduro jẹ awọn ayelẹ pataki julọ fun pinpin CNT paapaa. Awọn ultrasonicators ti Hielscher kii ṣe gba laaye fun iṣakoso kongẹ ti paramita kọọkan, gbogbo awọn ilana ilana ni a gbasilẹ laifọwọyi lori kaadi SD ti a ti ṣakopọ ti awọn ọna ṣiṣe ẹrọ oni-nọmba oni-nọmba Hielscher. Ilana ti ilana sonication kọọkan ṣe iranlọwọ lati rii daju awọn abajade ẹda ati didara deede. Ni iṣakoso aṣàwákiri latọna jijin olumulo olumulo le ṣiṣẹ ati ṣe abojuto ẹrọ ultrasonic laisi wa lori ipo ti eto ultrasonic.
Niwọn igba nanotubes carbon nanotled (SWNTs) ati awọn nanotubes erogba pupọ-walled (MWNTs) bakanna bi olooru ti a yan tabi alabọde ti nbeere awọn agbara ṣiṣe ni pato, titobi ultrasonic jẹ ipin bọtini nigbati o de ọja ikẹhin. Hielscher Ultrasonics’ awọn ilana ultrasonic ile-iṣẹ le fi giga ga bi daradara bi awọn amplitudes pupọ. Ṣeto titobi titobi fun awọn ibeere ilana rẹ. Paapaa awọn ohun amorindun ti o to 200µm le jẹ irọrun ni igbagbogbo ni iṣiṣẹ 24/7. Fun paapaa awọn titobi giga, awọn sonotrodes ultrasonic ti adani wa o si wa. Agbara ti ohun elo ultrasonic Hielscher ngbanilaaye fun iṣẹ 24/7 ni iṣẹ ẹru ati ni agbegbe awọn ibeere.
Awọn onibara wa ni itẹlọrun nipasẹ ṣiṣe agbara pataki ati igbẹkẹle ti awọn eto Hielscher Ultrasonic. Fifi sori ẹrọ ni awọn aaye ti awọn ohun elo ti o wuwo pupọ, nbeere awọn agbegbe ati iṣẹ 24/7 rii daju ṣiṣe ati ilana iṣuna ọrọ-aje. Ilọsiwaju ilana Ultrasonic dinku akoko sisẹ ati ṣaṣeyọri awọn abajade to dara julọ, ie didara ti o ga julọ, awọn eso ti o ga julọ, awọn ọja imotuntun.
Awọn tabili ni isalẹ yoo fun ọ ni itọkasi ti agbara gbigbe agbara ti wa ultrasonicators:

ipele iwọn didun Oṣuwọn Tisan Niyanju awọn ẹrọ
0.5 si 1.5mL na VialTweeter
1 si 500mL 10 si 200mL / min UP100H
10 si 2000mL 20 si 400mL / min UP200Ht, UP400St
0.1 si 20L 0.2 si 4L / min UIP2000hdT
10 si 100L 2 si 10L / min UIP4000hdT
na 10 si 100L / min UIP16000
na tobi oloro ti UIP16000

Pe wa! / Beere Wa!

Bere fun alaye sii

Jowo lo awọn fọọmu isalẹ, ti o ba fẹ lati beere afikun alaye nipa homogenization ultrasonic. A yoo dun lati fun ọ ni eto ultrasonic kan ti n ṣe awọn ibeere rẹ.









Jọwọ ṣe akiyesi wa Ìpamọ Afihan.


Hielscher Ultrasonics ṣe awọn iṣẹ ultrasonic-giga ultrasonic fun awọn ohun elo sonochemical.

Awọn oniṣẹ ultrasonic agbara giga lati laabu lọ si awọn ọkọ ofurufu ati iṣẹ-ṣiṣe iṣẹ.

Iwe-iwe / Awọn itọkasi

  • Biver T.; Criscitiello F.; Di Francesco F.; Minichino M.; Swager T.; Pucci A. (2015): MWCNT/Perylene bisimide Water Dispersions for Miniaturized Temperature Sensors. RSC Advances 5: 2015. 65023–65029.
  • Chiou K.; Byun S.; Kim J.; Huang J. (2018): Additive-free carbon nanotube dispersions, pastes, gels, and doughs in cresols. PNAS Vol. 115, No. 22, 2018. 5703–5708.
  • Huang, Y.Y:; Terentjev E.M. (2012): Dispersion of Carbon Nanotubes: Mixing, Sonication, Stabilization, and Composite Properties. Polymers 2012, 4, 275-295.
  • Krause B.; Mende M.; Petzold G.; Pötschke P. (2010): Characterization on carbon nanotubes’ dispersability using centrifugal sedimentation analysis in aqueous surfactant dispersions. Conference paper ANTEC 2010, Orlando, USA, May 16-20 2010.
  • Paredes J.I.; Burghard M. (2004): Dispersions of Individual Single-Walled Carbon Nanotubes of High Length. Langmuir 2004, 20, 5149-5152.
  • Santos A.; Amorim L.; Nunes J.P.; Rocha L.A.; Ferreira Silva A.; Viana J.C. (2019): A Comparative Study between Knocked-Down Aligned Carbon Nanotubes and Buckypaper-Based Strain Sensors. Materials 2019, 12, 2013.
  • Szelag M. (2017): Mechano-Physical Properties and Microstructure of Carbon Nanotube Reinforced Cement Paste after Thermal Load. Nanomaterials 7(9), 2017. 267.



Awọn Otitọ Tita Mọ

erogba nanotubes

Awọn nanotubes erogba (CNTs) jẹ apakan ti kilasi pataki kan ti awọn ohun elo erogba onisẹpo kan, ṣafihan ẹrọ ti a ko mọ, itanna, igbona, ati awọn ohun-elo opitika. Wọn jẹ paati pataki ti a lo ninu idagbasoke ati iṣelọpọ awọn nanomaterials ti ilọsiwaju gẹgẹbi awọn ohun elo nano-com, awọn polima ti a fi agbara mu ati bẹbẹ lọ ati nitorinaa a lo ninu awọn imọ-ẹrọ ti ilu. CNTs ṣe afihan agbara fifẹ giga kan ti o ga julọ, awọn ohun-ini gbigbe gbigbe gaju to ga julọ, awọn eegun ẹgbẹ kekere ati iduroṣinṣin kemikali ati iduroṣinṣin ti ara, eyiti o jẹ ki awọn nanotubes jẹ afikun afikun ileri fun awọn ohun elo lọpọlọpọ.
O da lori eto wọn, CNTS ṣe iyasọtọ sinu awọn nanotubes erogba ẹyọ-olodi (SWNTs), awọn nanotubes erogba oni-meji ti o ni ẹbun (DWCNTs), ati awọn nanotubes carbon pupọ ti o ni walẹ (MWNTs).
SWNTs jẹ ṣofo, awọn iwẹlidi gigun gigun ti a ṣe lati odi atomu kan ti o nipọn. Atọka atomiki ti awọn carbons ti wa ni idayatọ ni latissi oyin. Nigbagbogbo, wọn ṣe afiwewe pẹlu awọn apo-iwe ti a yiyi ti ayaworan-alawọ tabi graphene.
DWCNTs jẹ awọn nanotubes meji ti o ni ẹyọkan, pẹlu itẹ-ẹiyẹ kan laarin ekeji.
MWNTs jẹ fọọmu CNT kan, nibiti ọpọlọpọ awọn nanotubes erogba ti o ni ẹyọ-ara ti wa ni itosi si ara wọn. Niwọn iwọn ila opin wọn laarin 3-30 nm ati bi wọn ṣe le dagba pupọ cm gigun, ipin ipin wọn le yatọ laarin 10 si mẹwa mẹwa. Ti a ṣe afiwe si awọn nanofibers erogba, MWNTs ni ọna odi ti o yatọ, iwọn ila opin ti o kere, ati inu inu ti o ṣofo. Nọmba MWNT ti o wa ni iṣọpọ ti iṣọpọ ti iṣọpọ ti o wọpọ fun apẹẹrẹ jẹ Baytubes® C150P, Nanocyl® NC7000, Arkema Graphistrength® C100, ati FutureCarbon CNT-MW.
Iṣelọpọ ti CNT: CNT le ṣe nipasẹ ọna iṣelọpọ ti ipilẹ pilasima tabi ọna eepo fifa sita omi, ọna itọsi ina lesa, ilana iṣelọpọ ọfin, ifipamọ kẹmika kẹmika (CVD) tabi ipasẹ imulẹ imudara elektiriki igbelaruge.
Iṣẹ-iṣe ti CNTs: Lati mu awọn abuda ti awọn nanotubes erogba ṣiṣẹ ki o jẹ ki wọn ni ibamu diẹ sii si ohun elo kan pato, CNTs nigbagbogbo ni iṣẹ ṣiṣe, fun apẹẹrẹ nipa fifi afikun acid (-COOH) tabi awọn ẹgbẹ hydroxyl (-OH).

Awọn ifikun Awọn ifunni CNT

Awọn ohun kekere diẹ bi awọn acids super, awọn olomi ionic, ati N-cyclohexyl-2-pyrrolidnone ni o lagbara lati mura awọn pipinka ifọkansi giga ti CNTs, lakoko ti awọn nkan ti o wọpọ julọ fun awọn nanotubes, gẹgẹ bi N-methyl-2-pyrrolidone (NMP ), dimethylformamide (DMF), ati 1,2-dichrolobenzene, le tuka awọn nanotubes nikan ni awọn ifọkansi kekere pupọ (fun apẹẹrẹ, ojo melo <0.02 wt% of single-walled CNTs). The most common dispersion agents are polyvinylpyrrolidone (PVP), Sodium Dodecyl Benzene Sulfonate (SDBS), Triton 100, or Sodium Dodecyl Sulfonate (SDS). Cresols are a group of industrial chemicals which can process CNTs at concentrations up to tens of weight percent, resulting in a continuous transition from dilute dispersions, thick pastes, and free-standing gels to an unprecedented playdough-like state, as the CNT loading increases. These states exhibit polymer-like rheological and viscoelastic properties, which are not attainable with other common solvents, suggesting that the nanotubes are indeed disaggregated and finely dispersed in cresols. Cresols can be removed after processing by heating or washing, without altering the surface of CNTs. [Chiou et al. 2018]

Awọn ohun elo ti Awọn fifin CNT

Lati lo awọn anfani ti CNTs, wọn gbọdọ wa ni kaakiri sinu omi bi polima, Paapaa CNT ti tuka jẹ lilo fun iṣelọpọ ti awọn pilasitik oludari, awọn ifihan gara gara omi, awọn ilana imukuro ina Organic, awọn iboju ifọwọkan, awọn ifihan to rọ, awọn sẹẹli oorun, awọn inki inira, awọn ohun elo iṣakoso aimi, pẹlu awọn fiimu, awọn irọ, awọn okun, ati awọn aṣọ, awọn aṣọ ibora ti polima ati awọn ifunmọ, awọn eroja iṣelọpọ giga ti polima pẹlu agbara ohun elo apọju ati lile, awọn okun idapọ polymer / CNT, bi daradara bi iwuwo ati awọn ohun elo antistatic.