Your SlideShare is downloading. ×
Hvmg14oladislaus
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Hvmg14oladislaus

26
views

Published on

www.hvm-uk.com 2014 Talk at HVM Graphene+ Oxford

www.hvm-uk.com 2014 Talk at HVM Graphene+ Oxford

Published in: Technology, Business

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
26
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. A New Industrially Relevant Route to High Quality Graphene Paul Ladislaus Advanced Materials Division HVM Graphene+ 2014 Conference Oxford, United Kingdom 15 May 2014 www.hvm-uk.com
  • 2. Thomas  Swan  &  Co.  Ltd.   •  Independently  owned   •  Medium  sized  enterprise  (SME)   •  168  employees   •  ca.  £27M  revenue  (2012/13)   •  UK  manufacturing  base   •  Conse=,  Co.  Durham,UK.   •  Export  performance   •  UK/EU/Outside  EU   •  Commitment  to  highest  standards    
  • 3. Performance  Chemicals   •  Proven  reliability  in  tyre  &  rubber,  coaGng  addiGves  &    household  care.     Custom  Manufacture   •  Flexible  and  responsive  with  over  100  custom   manufacturing  products.     Advanced  Materials   •  Excited  by  new  opportuniOes  for  high  performance   materials  in  emerging  markets.     Thomas  Swan  Group   •  AppeOte  for  venturing  and  early  investors  in  new    technologies.   Our  Business   Performance Chemicals / Custom Manufacture / Advanced Materials
  • 4. Our  CapabiliGes   • Established  manufacturing   infrastructure   • Capital  Engineering   • Quality  Control   • Environmental  Control   • Scheduling/LogisGcs   • Regulatory  Affairs   • Process  Engineering     • Process  design  and  piloGng   • Flexible  chemistries   • Proven  scale-­‐up  experience   • Underpinned  by  recognised   accreditaGons   • ISO  9001   • ISO  14001   • OHSAS  18001   • Responsible  Care   …….and  Customer  Care  excellence.  
  • 5. Advanced  Materials  Division   Reliability  &  Quality  in  carbon  nanomaterials.      
  • 6. Advanced  Materials  –  Carbon  Nanotubes   Elicarb®  Carbon  Nanotubes:   Single  wall  (SW)  and  mulO-­‐wall  (MW)  products:   From  iniGal  investments  with  the  University  of   Cambridge  in  2004  to  .......   •  World  leading  SW  manufacturing  capability.   •  Scaled  to  support  both  exisGng  and  emerging    opportuniGes.   •  Proven  ability  to  supply  mulG-­‐kg  quanGGes  at    compeGGve  pricing  to  global  customers.    •  high  quality  nanotubes    •  low  catalyst  residues    •  high  surface  area           500kg/yr  washing  facility  for  Elicarb®  SW  Low  Residue   products  at  Thomas  Swan's  Consee  site.    
  • 7. Elicarb®  SW  products   •  Elicarb®  SW  and  Elicarb®  SW  Low  Residue  are  market  leading  SWNT   products  for  advanced  electronics.   Raman  shows  high  graphiGc  carbon  content   TGA  shows  high  carbon  content   SEM  shows  high  SW  carbon   nanotube  content.   TEM  shows  high  SWNT  &  DWNT   content.  
  • 8. Elicarb®  MW  products   •  Elicarb®  MW  is  a  specialist  MWNT  product  which  Thomas  Swan  provides  in   development  &  prototyping  quanGGes.   Raman  shows  typical  MW  graphiGc  carbon  content   TGA  shows  high  carbon  content   SEM  shows    high  MW   carbon  nanotube  content.   TEM  shows  mulG-­‐wall   structure.  
  • 9. Advanced  Materials  –  Graphene     •  Thomas  Swan  selected  liquid  phase   exfoliaGon  of  graphite  as  a  route  to   graphene.   •  Aiming  for  Graphene  Nanoplatelets  which   are  substanGally  non-­‐oxidised  with  no   catalyst  residues.   •  Process  developed  in  collaboraGon  with   Prof.  J.  Coleman  at  CRANN,  Trinity  College   Dublin  (TCD).   •  Exclusively  licensed  to  Thomas  Swan  &  Co.   Ltd.   •  Target  applicaGons  include:   •  ConducGve  inks   •  Super-­‐capacitors  &  baeeries   •  Barrier  &  separaGons   •  Thermal  management   Elicarb®  Graphene:     “Industrially  relevant  route  to  high   quality  graphene”.      
  • 10. Graphene  -­‐  TCD  Lab  Exfoliated   Graphene  platelets  produced  by   liquid  phase  exfoliaOon  at  TCD  are   non-­‐oxidised,  with  typical  X-­‐Y  size  of   1000nm  and  5-­‐7  carbon  layers  in   depth.     Transmission  electron  micrograph   showing  typical  graphene  platelets.  The   average  platelet  diameter  is  1000nm.   Raman  spectrum  shows  a  strong  graphite   band  (D/G  raOo  =  0.36)  when  compared   with  the  compeOtor  material  prepared  by   ion  intercalaOon  (D/G  raOo  =  0.75).   XPS  analysis  of  solvent   exfoliated  graphene.  The  N,  O,   and  H  signals  are  consistent   with  the  presence  of  solvent   residues.   0 5 10 15 20 25 30 0 4 8 12 16 AFMCount(%) Thickness, N <N>=6.6 AFM  analysis  of  mean  thickness   in  NMP  exfoliated  GNPs  shows   an  average  plate  thickness   between  5  and  7  carbon  layers.        
  • 11. TCD  -­‐  High  Shear  Liquid  ExfoliaGon   • Liquid  phase  exfoliaGon  by  high   shear  mixing.   • No  ultrasonics   • No  aggressive  chemistry   • Ambient  condiGons.   • Range  of  solvents  –  including  water.   • Stabilised  graphene  dispersions.   • Patented  process.   • Full  scienGfic  details  published  in   April  2014:   Paton  et  al.,  Scalable  producGon  of  large  quanGGes  of   defect-­‐free,  few-­‐layer  graphene  by  shear-­‐exfoliaGon  in   liquids,  Nature  Materials  (2014)     Typical  Rotor/Stator  equipment  used  for  preparing   graphene  dispersions.     •  Liquid  phase  exfoliaGon   process  is  being  scaled  at   Thomas  Swan,  Consee.     •  Current  status  is  g/day  pilot   which  will  reach  kg/day  by  end   2014.  
  • 12. 2 4 Re / 10Mixer ND ρ η= = Turbulence !γ ≈ π DN d =104 s−1 Minimum  shear  rate  more  important  than  turbulence   What  is  the  ExfoliaGon  Mechanism?  
  • 13. Scale  Up  Parameters  are  Available  
  • 14. GeneraGon  of  Significant  Public  Interest  
  • 15. Thomas  Swan  Elicarb®  Graphene     Raman  spectra  of  Elicarb®  Graphene  Powder   (514  nm  excitaOon  laser  wavelength).   The  Raman  spectrum  shows  high  quality  sp2   network  with  D/G  raOo  of  0.23  and  D/D’  of  4.8    TGA  to  1100oC  in  air    of  Elicarb®  Graphene   Powder  exfoliated  in  water/surfactant  shows    a   small    surfactant  residue  (loss  at  ca.  300oC).    Primary  decomposiOon  of  graphene  at    800oC.  
  • 16. Thomas  Swan  Elicarb®  Graphene     TEM  analysis  of    typical    Elicarb®  Graphene  Powders.  
  • 17. Thomas  Swan  Elicarb®  Graphene     TEM  Image    parOcle  size  analysis  of  Elicarb®   Graphene  Powder.  Average  X-­‐Y  dimension  is   ca.  1  micron.     TEM  analysis  of  Elicarb®  Graphene  Powder   shows  very  consistent  flake  size  between   batches.   500nm  scale  bar   100nm  scale  bar  
  • 18. Thomas  Swan  Elicarb®  Graphene     Sheet  Resistance:   •  4  point  probe   •  Filtered  solids   10  Ω/□  for  25µm  film.     Graphene  platelet  thickness:   •  5-­‐7  carbon  layers.         Elicarb®  Graphene  Products:   Products  are  available  commercially   Elicarb®Graphene   Powder   Elicarb®Graphene   Dispersion  (AQ)  
  • 19. Summary:  Elicarb®  Graphene  Products     •  We  have  developed  a  scalable  route  to  prisGne  graphene   nanoplatelets.   •  Typical  parGcle  size  is  1000nm  in  X-­‐Y  dimension  and  5-­‐7   carbon  layers  in  Z  dimension.   •  The  products  have  low  defect  levels  and  high  conducGvity  /   low  sheet  resistance.   •  Development  products  are  now  available  for  evaluaGon.  
  • 20. Follow  up  QuesGons   Many  thanks  for  your  aeenGon.   I  am  happy  to  answer  quesGons.   pladislaus@thomas-­‐swan.co.uk     We  would  be  delighted  to  discuss  the  needs  of  your  applicaGon.    
  • 21. Advanced  Materials  Division   Reliability  &  Quality  in  carbon  nanomaterials.      
  • 22. Appendix  
  • 23. Nanomaterial  Safety  &  Regulatory   ConGnuing  safe  commercialisaGon  of  new  nanomaterials  remains  a   priority  for  the  materials  industry.    This  is  an  evolving  framework  and   Thomas  Swan  takes  a  pro-­‐acGve  role……       •  Compliance   .....with  exisGng  legislaGon…..plus  external  verificaGon.   •  Awareness   …..of  new  scienGfic  publicaGon  and  changing  regulatory  requirements.   •  Support   .....increased  understanding  through  in-­‐house  studies  and  collaboraGons  (eg.   NanoReg).   •  Engagement   …..with  Industry  associaGons    such  as  CIA  Nanomaterials  Issue  Team.   •  CommunicaGon   …..of  new  informaGon  as  we  enhance  our  understanding.    

×