Multi-walledcarbonnanotubes(MWCNTs)areaspecialformofcarbonnanotubesinwhichmultiplesingle-walledcarbonnanotubesarenestedinsideoneanother.AlthoughMWCNTsarestillclassedasa1-dimenionalformofcarbon,theuniquepropertiesthatareseenwithinsingle-walledanddouble-walledcarbonnanotubesarenotasprominent.ThereasonforthisisthehigherprobABIlityof defectsoccurring.ThesedisadvantagesareoffsetbytheincreaseddispersabilityofMWCNTs,andthereducedcostinsynthesisandpurificationofthesematerials. AtossilawesellarangeofMWCNT"swithdifferentpuritiesandanddiameters.Additionally,wesell-carbolicacid(COOH)andhydroxyl(-OH)functionalisednanotubesinarangeofdifferentdiameters. |  | |
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ProductList
AllourMWCNTscomepackedasdrypowders,whichcanbedispersedwithintheuserssolventofchoice.
Multi-WalledCarbonNanotube Powders
| Productcode | M2008D1 | M2008D2 | M2008D3 | M2008D4 | M2008D5 |
| InternalDiameter | 2-5nm | 5-10nm | 5-10nm | 5-12nm | 5-15nm |
| OuterDiameter | <8nm | 15nm | 25nm | 40nm | >50nm |
| Length | 10-30μm | 10-30μm | 10-30μm | 10-30μm | 10-30μm |
| SpecificSurfaceArea | >500m2.g-1 | >200m2.g-1 | >110m2.g-1 | >60m2.g-1 | >40m2.g-1 |
| Purity | >95% | >95% | >95% | >95% | >95% |
| MSDS |  | ||||
| SaleQuantities | 500mg,1g,5g | ||||
| PackagingInformation | Light-resistantbottle | ||||
*Forlargerorders,pleaseemailustodiscussprices
High-PurityMulti-WalledCarbonNanotube Powders
| Productcode | M2009D1 | M2009D2 | M2009D3 | M2009D4 | |
| InternalDiameter | 5-10nm | 5-10nm | 5-12nm | 5-15nm | |
| OuterDiameter | 15nm | 25nm | 40nm | >50nm | |
| Length | 10-30μm | 10-30μm | 10-30μm | 10-30μm | |
| SpecificSurfaceArea | >100m2.g-1 | >55m2.g-1 | >30m2.g-1 | >20m2.g-1 | |
| Purity | >99.9% | >99.9% | >99.9% | >99.9% | |
| MSDS | | ||||
| SaleQuantities | 500mg,1g,5g | ||||
| PackagingInformation | Light-resistantbottle | ||||
*Forlargerorders,pleaseemailustodiscussprices.
COOHFunctionalisedMulti-WalledCarbonNanotubePowders
| Productcode | M2010D1 | M2010D2 | M2010D3 | M2010D4 | |
| InternalDiameter | 5-10nm | 5-10nm | 5-12nm | 5-15nm | |
| OuterDiameter | 15nm | 25nm | 40nm | >50nm | |
| Length | 10-20μm | 10-20μm | 10-20μm | 10-20μm | |
| COOHContent | 1.0% | 0.6% | 0.4% | 0.3% | |
| SpecificSurfaceArea | >120m2.g-1 | >55m2.g-1 | >30m2.g-1 | >30m2.g-1 | |
| Purity | >99.9% | >99.9% | >99.9% | >99.9% | |
| MSDS | | ||||
| SaleQuantities | 500mg,1g,5g | ||||
| PackagingInformation | Light-resistantbottle | ||||
*Forlargerorders,pleaseemailustodiscussprices.
OHFunctionalisedMulti-WalledCarbonNanotubePowders
| Productcode | M2011D1 | M2011D2 | M2011D3 | M2011D4 | |
| InternalDiameter | 5-10nm | 5-10nm | 5-12nm | 5-15nm | |
| OuterDiameter | 15nm | 25nm | 40nm | >50nm | |
| Length | 10-20μm | 10-20μm | 10-20μm | 10-20μm | |
| OHContent | 1.3% | 0.8% | 0.5% | 0.4% | |
| SpecificSurfaceArea | >100m2.g-1 | >55m2.g-1 | >30m2.g-1 | >20m2.g-1 | |
| Purity | >99.9% | >99.9% | >99.9% | >99.9% | |
| MSDS | | ||||
| SaleQuantities | 500mg,1g,5g | ||||
| PackagingInformation | Light-resistantbottle | ||||
*Forlargerorders,pleaseemailustodiscussprices.
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WhatareMulti-WalledCarbonNanotubes?
MWCNTsconsistofmultiplecarbonnanotubesnestedwithinoneanother.ThenumberofnanotubesthatarewithinaMWCNTcanvary-fromaslittleas3,toover20.Atthesametimethediameterofboththeinternalnanotubeandtheexternalmostnanotubecanvary-from2nmfortheinnermosttube,toover50nmfortheouterwall.Justlikesingle-wallednanotubes,theyexhibitexceptionalelectrical,thermal,andmechanicalproperties.However,duetotheincreasednumberofwalls,thereisahigherlikelihoodofdefectsbeingpresentcomparedtosingle-wallednanotubes-resultinginreducedperformances.TheouterwallsofMWCNTscanbemodifiedwithfunctionalgroupssuchashydroxides,carboxylicacids,oramidestoproduceadditionalfunctionality(e.g.improveddispersability,ortheabilitytoattachbindingsitesforuseinbiomedicalapplications). MWCNTscanbeproducedinhighquantitiesandareeasiertopurify (incomparisontosinglewalledanddouble-wallednanotubes).Thismakestheirproductioncostssignificantlylower,andisareasonfortheiradoptioninmultipleareasofscientificresearch.ApplicationsofMWCNTshavebeenmainlyfocusedaroundtheiruseincompositeswheretheycanbeusedasanadditive.eitherto:i)improvethemechanicalpropertiesofamaterial,orii)toimprovetheelectricalpropertiesofamaterial.Asidefrombeingusedasadditives,functionalisedMWCNTsarebeingutilisedinavarietyofmedicalandbiotechnologicalapplications.Thisis duetotheirhighbiocompatibilityofcarbonnanotubesandtheabilitytoattachspecificproteinstofunctionalgroups.Thiscanprovideawidevarietyoftargetedtherapiessuchasdrugdelivery,localisedheatingfortriggeringcelldeath,orevenminiaturebiosensorsforin-situmeasurements. |
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DispersionGuides
Likesinglewalledcarbonnanotubes,MWCNT"sareinsoluble.Fordispersinginaqueoussolutionswerecommendtheuseof sodium dodecylbenzenesulfonateifanionicsurfactantissuitableifanonionicsurfactantisneededwerecommendsurfactantswithhighmolecularweights.
- Weighoutthedesiredamountofnanotubes.
- Mixtogetheryoursolventandsurfactantofchoiceatthedesiredsurfactantconcentration.Thisshouldbebelowthecriticalmicelleconcentrationofthesurfactant.
- Addthesolvent-surfactantmixtothedrypowderandshakevigorouslytomix.
- Eitherplaceanultrasonicprobeintothesolutionorplacethesolutionintoanultrasonicbath.Becarefulaboutthelengthoftimeandpowerused,asdamagetothecarbonnanotubescanoccur,shorteningtheiraveragelength.
- TheresultingsolutionwillbeamixtureofsUSPendednanotubesandbundlesofnanotubes,furthersonicationwillhelpbreakupthebundles.
- Toseparateouttheindividualnanotubesinsolutionfromthebundlesthesolutionshouldbeplacedwithinacentrifuge.Ifthesolutioniscentrifugedforalongertimeand/oratahigherthesmallerbundleswillberemovednarrowingthedistributionofsuspendednanotubes.
ForfunctionalisednanotubesitispossIBLetodispersethemwithouttheuseofanysurfactants.However,thetotalconcentrationofdispersednanotubeswillbelower.Amaximumof0.1mg/mlcanbeachievedforCOOHandOH.
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TechnicalData
GeneralInformation
| CASnumber | 7440-44-0 |
| Chemicalformula | CxHy |
| RecommendedDispersants | DIWater,DMF,THF,Ethanol,Acetone |
| Synonyms | Multi-WalledCarbonNanotubes,MultiWallCarbonNanotube, CarbonNanotube,MWNT,MWCNT |
| Classification/Family | 1Dmaterials,Carbonnanomaterials,Nanomaterials,Polycyclicaromatichydrocarbons, thin-filmelectronics. |
| Colour/Appearance | Blackfibrouspowder |
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1DRelatedProducts
Single-WallCarbonNanotubes
Double-WalledCarbonNanotubes
Multi-WalledCarbonNanotubes
Multi-WalledCarbonNanotubePublications
- ThermalandElectricalConductivityofSingleandMulti-WalledCarbonNanotube-EpoxyComposites,AMoisalaet.al.,Compos.Sci.Technol.,66,1285-1288(2006)DOI:10.1016/j.compscitech.2005.10.016
- 99.9%PurityMulti-WalledCarbonNanotubesbyVacuumHigh-TemperatureAnnealing,W.Huang,et.al.,Carbon,41,2585-2590,(2003)DOI:10.1016/S0008-6223(03)00330-0
- ElasticModuliofMulti-WalledCarbonNanotubesandtheEffectofVanderWaalsForces,C.Li,et.al.,63,1517-1524,(2003)DOI:10.1016/S0266-3538(03)00072-1
- LowPercolationThresholdofElectricalConductivityandRheologyinpoly(EthyleneTerephthalate)ThroughtheNetworksofMulti-WalledCarbonNanotubes,G.Hu, et.al.,47,480-488,(2006)DOI:10.1016/j.polymer.2005.11.028
- MechanicalBehaviourandMicrostructureofCementCompositesIncorporatingSurface-TreatedMulti-WalledCarbonNanotubes,G.Ying,et.al.,43,1239-1245,(2005)DOI:10.1016/j.carbon.2004.12.017
- SurfaceModifiedMulti-WalledCarbonNanotubesinCNT/EpoxyComposites,F.H.Gojny,et.al.,Chem.Phys.Lett.,370,820-824,(2003)DOI:10.1016/S0009-2614(03)00178-8
- ChemicalOxidationofMulti-WalledCarbonNanotubes,V.Datsyuk, et.al.,Carbon,46,833-840,(2008)DOI:10.1016/j.carbon.2008.02.012
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Tothebestofourknowledge,thetechnicalinformationprovidedhereisaccurate.However,Ossilaassumenoliabilityfortheaccuracyofthisinformation.Thevaluesprovidedherearetypicalatthetimeofmanufactureandmayvaryovertimeandfrombatchtobatch.
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