carbon nanotubes : an additive with multi- functional
TRANSCRIPT
Carbon Nanotubes : Carbon Nanotubes : An additive with multiAn additive with multi--
functional properties and current functional properties and current commercial applicationscommercial applications
Andrew RichAndrew RichNanocyl s.aNanocyl s.a
Contact: Contact: [email protected]@nanocyl.comwww.nanocyl.comwww.nanocyl.com
SPE Automotive Composites Conference and Exposition , Troy MI 2006
Outline
1. Introduction to carbon nanotubes2. Overview of Nanocyl3. Current commercial applications for
carbon nanotubes4. Reviewing their benefits in polymers5. Automotive applications of CNTs
Two Forms:Single Wall (SWNT) and
Multi Wall(MWNT)
• Nanotubes are, with C60, the third Crystaline form of Carbon• Basically just a tube made from hexagonally bonded Carbon
Courtesy of J. Coleman, Trinity College of Dublin
Carbon black
MWNT 10 nm
Carbon nanotubesCarbon nanotubesMechanical propertiesMechanical properties
MaterialMaterial SpecificSpecificDensityDensity
E (TPa)E (TPa) Strength Strength (GPa)(GPa)
Strain at beakStrain at beak(%)(%)
CNT CNT (SW&MW)(SW&MW)
1.3 1.3 -- 22 11 10 10 -- 6060 > 10> 10
Silicate Silicate nanoplateletnanoplatelet
2.8 2.8 -- 33 0.170.17 11 < 10< 10
Carbon Carbon nanofiber nanofiber
(VGCF)(VGCF)
22 0.4 0.4 -- 0.60.6 3 3 -- 77 < 10< 10
Unique combination of Unique combination of stiffness, strength stiffness, strength and tenacityand tenacity
Carbon nanotubesCarbon nanotubesTransport propertiesTransport properties
MaterialMaterial ThermalThermalConductivityConductivity
(W /m.K)(W /m.K)
ElectricalElectricalConductivityConductivity
(S/m)(S/m)
CNTCNT 30003000 101055 –– 10107 7 (axial)(axial)
SilverSilver 429429 6.3 x 106.3 x 1077
CopperCopper 400400 5.9 x 105.9 x 1077
Carbon Carbon nanofiber nanofiber
(VGCF)(VGCF)19501950 2 x 102 x 1033
High thermal & electrical conductivityHigh thermal & electrical conductivity
Catalyst support
The challenge: To disperse
Nanocyl ® 7000/3100Multi-wall CNT
D: 9.5 nm L = 1.3 micronNC7000 C purity = 90%
NC3100 C purity = 99+%BET : 300 m2/g
Nanocyl ® 2100Double Wall CNT
D: 3.7 nm L = several micronsC Purity 90+%
BET : 550 m2/g
Product lines -Double-wall, Multi-wall,
dispersions, and surface treatments
Capacity developmentCapacity development
Laboratory scale and
continuous prototype
2002
Commercial pilot Operation5+ Tonnes
2005
Industrial Unit100+ Tonnes
2008
2004
2006
2007
Intermediate 30+ Tonnes
Product development Product development assistanceassistance
nn InIn--house applications laboratoryhouse applications laboratory
nnDSM microDSM micro--extruder with films & injection molding extruder with films & injection molding devicesdevices
nn InIn--situ polymerization unitsitu polymerization unitnn Inks, slurries & films manufacturingInks, slurries & films manufacturingnnTensile properties, MFI, electrical measurementsTensile properties, MFI, electrical measurements
nn External External
nnPilot twinPilot twin--screw extruder and injection moldingscrew extruder and injection moldingnnAssociate research laboratoriesAssociate research laboratories
Markets and products Markets and products DevelopmentDevelopment-- Short termShort term
nn Thermoplastic & Thermoset Thermoplastic & Thermoset CompoundsCompounds
nnESD ESD nn AutomotiveAutomotivenn ElectronicsElectronicsnn Chemical processing Chemical processing
industryindustrynnElectrostatic paintingElectrostatic paintingnnStructural & ThermalStructural & Thermal
nn Specialty films and coatingsSpecialty films and coatingsnnTransparent electrodesTransparent electrodesnnConductive coatingsConductive coatingsnnStructural & ThermalStructural & Thermal
Markets and products Markets and products Development Development -- Medium Medium
to Long termto Long term
nn Electron sourcesElectron sourcesnnField Emission DisplayField Emission DisplaynnSolar panel coatingsSolar panel coatings
nn PEM Fuel cells and batteriesPEM Fuel cells and batteriesnnElectrode materialElectrode materialnnCatalyst supportCatalyst support
Commercializing of Commercializing of carbon nanotubes carbon nanotubes ––
Current status Current status
Carbon nanotubesCarbon nanotubesCommercialization of their propertiesCommercialization of their properties
nn MechanicalMechanical
nn Babolat VS Nanotube Drive tennis racket (Babolat VS Nanotube Drive tennis racket (20012001))
nn Völkl DNX tennis racket (Völkl DNX tennis racket (20052005))
www.voelkl-tennis.com
Carbon nanotubesCarbon nanotubesCommercialisation of their propertiesCommercialisation of their properties
nn MechanicalMechanicalnn Bicycles (Bicycles (20052005))
nn Baseball Bats (Baseball Bats (20062006))
The Benefits of CNTs in The Benefits of CNTs in polymers and how to polymers and how to
increase their efficiency increase their efficiency
nn Electrically conductiveElectrically conductivenn ESD & conductive polymersESD & conductive polymers
nn Thermally conductiveThermally conductivenn Thermal managementThermal management
nn Flame retardantFlame retardantnn FireFire--proof compoundsproof compounds
nn High strength & stiffnessHigh strength & stiffnessnn Structural & tribological compoundsStructural & tribological compounds
Properties of interest in Properties of interest in polymer applicationspolymer applications
Structure of the nanotubes after synthesis - Nanocyl ® 7000
Aggregates are large: they need to be disentangled during the dispersion process – Strong influence of the texture of the
aggregates on the dispersion process
Manufacturing Manufacturing carbon nanotubes compoundscarbon nanotubes compounds
Source: IPF Dresden
Electrical resistivity of polycarbonate vs. Carbon loading
1,E+001,E+021,E+041,E+061,E+081,E+101,E+121,E+141,E+161,E+181,E+20
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Carbon loading, wt %
Nanocyl 7000
Cabot VulcanXC-72Akzo Ketjenblack300J
Res
istiv
ity, O
hm.c
m
Carbon Nanotubes for Carbon Nanotubes for ESD applicationsESD applications
Carbon Nanotubes for Carbon Nanotubes for ESD applicationsESD applications
Influence of the additive on Impact strengthConductive PC/ABS compounds designed with Rv < 103 Ohm.cm
0% additive
0
10
20
30
40
50
60
PC/ABS MWNT CF CB
Not
ched
Cha
rpy
(kJ/
m2)
Source: CRIF
Carbon Nanotubes for Carbon Nanotubes for structural compoundsstructural compounds
nn Superior mechanical properties of the carbon Superior mechanical properties of the carbon nanotubesnanotubes
High expectationsHigh expectations Results are PROCESS dependantResults are PROCESS dependant ScaleScale--up of laboratory dataup of laboratory data-- challengingchallenging
nn Increased properties reported in the literatureIncreased properties reported in the literaturenn Wear resistanceWear resistancenn Stiffness & strength of elastomersStiffness & strength of elastomersnn Adhesion in fibre reinforced compositesAdhesion in fibre reinforced compositesnn Interlaminar shear strength and stiffnessInterlaminar shear strength and stiffness
nn Surface modification increases efficiencySurface modification increases efficiency
Application in Application in Epoxy composites Epoxy composites
N
Source: F. Gojny et al. , TU Hamburg
Improvement of epoxy toughness by ~ 45% at Improvement of epoxy toughness by ~ 45% at only 0.5% loading !only 0.5% loading !
Fracture toughness KIC (MPa m1/2) enhancement of epoxy resin using very low loading of carbon nanotubes
0
0,2
0,4
0,6
0,8
1
1,2
0 wt.% CNT 0.5 wt.% Nanocyl 2152 (DWNT-NH2)
Application to Application to Epoxy composites Epoxy composites
NSource: F. Gojny et al. , TU Hamburg
Epoxy toughness improved by crack bridging Epoxy toughness improved by crack bridging mechanismmechanism
Epoxy composites Epoxy composites --Application inApplication in
Glass Fiber Reinforced Composites made by Resin Glass Fiber Reinforced Composites made by Resin Transfer MoldingTransfer Molding
N
Source: F. Gojny et al. , TU Hamburg
Improvement of ILSS by 20% at only 0.3% Improvement of ILSS by 20% at only 0.3% loading in the resin !loading in the resin !
Interlaminar Shear Strength (MPa) enhancement of Glass Fiber Reinforced Epoxy using very low loading of carbon nanotubes
25
27
29
31
33
35
37
39
41
0 wt.% CNT 0.3 wt.% Nanocyl 2152 (DWNT-NH2)
Polypropylene Polypropylene –– Exxon MobilExxon Mobil (HP MFI 4.5)(HP MFI 4.5)
CarbonCarbonloadingloading
Tensile Tensile ModulusModulus(MPa)(MPa)
Tensile Tensile Strength at Strength at
breakbreak(MPa)(MPa)
Elongation at Elongation at breakbreak(%)(%)
Charpy Impact Charpy Impact –– NotchedNotched(kJ/m(kJ/m22))
0 %0 % 16721672 20.720.7 114.1114.1 5.25.2
NC7000NC70001 %1 % 17911791 24.824.8 13.813.8 5.95.9
3 %3 % 20562056 35.935.9 13.613.6 5.15.1
5 %5 % 22112211 3838 10.610.6 5.25.2
Carbon nanotubesCarbon nanotubesas reinforcementas reinforcement
Carbon nanotubes as Carbon nanotubes as flame retardantsflame retardants
MechanismMechanism
Source: Dr. Beyer, Carbon Nanotubes as a New Class of Flame Retardants for PolymersSource: Dr. Beyer, Carbon Nanotubes as a New Class of Flame Retardants for Polymers
Clays-based nanocomposites char
+ MWNT =
Nanotubes/Clays composite char
Carbon nanotubes addition promotes strong char formation Improved flame retardancy properties
Carbon Nanotubes in Carbon Nanotubes in Automotive applicationsAutomotive applications
CurrentCurrentnn Fuel systems Fuel systems –– fuel pumps, filters and lines, fuel pumps, filters and lines,
which need to dissipate staticwhich need to dissipate staticnn Electrostatic PaintElectrostatic Paint--able body exterior plasticsable body exterior plasticsFutureFuturenn AdhesivesAdhesivesnn FlameFlame--retardant interior reinforcementretardant interior reinforcementnn Heat reflective / dissipative coatingsHeat reflective / dissipative coatingsnn PEMPEM fuel cell componentsfuel cell components
Review of Applications for Review of Applications for Carbon nanotubesCarbon nanotubes
nn Carbon nanotubes are being used today in commercial Carbon nanotubes are being used today in commercial applicationsapplications
nn ConductiveConductive thermoplastics & coatings (automotive & thermoplastics & coatings (automotive & electronics)electronics)
nn Sporting goodsSporting goods
nn They can meet technical specifications from below 0.5% They can meet technical specifications from below 0.5% up to 2.5% loading depending on applicationup to 2.5% loading depending on application
nn Effectiveness vs. loading can be increased by specific preEffectiveness vs. loading can be increased by specific pre--treatments or posttreatments or post--treatmentstreatments
nn Larger availability and better price/performance ratio will Larger availability and better price/performance ratio will enable larger uses in polymer applicationsenable larger uses in polymer applications
Thank you for your interest Thank you for your interest !!