Embed Size (px)
DESCRIPTION
At the fifth annual HiPerNano conference and exhibition the Technical Manager for Haydale, Martin Williams, held a presentation entitled 'Advances in Surface Functionalisation of Graphene Materials'.
Citation preview
HiPerNano 2013 Advances in Surface Functionalisation of Graphene Materials
Introductions
Martin Williams Technical Manager at Haydale
2 of 12
Brand Name
Company
Removing the barriers to practical use of Industrial Nano-Carbons
Products
3 of 12
HDPlas™ GNPs - Graphene Nanoplatelets HDPlas™ MWCNTs - Multi-Walled Carbon Nanotubes HDPlas™ ZnOP - Zinc Oxide Nanoplatelets
HDPlas™ FLG700 - Few Layered Graphene HDPlas™ SWCNTs - Single-Walled Carbon Nanotubes HDPlas™ ZnOBs - Zinc Oxide Nanobelts
Services
4 of 12
Functionalisation Service Bespoke plasma treatments Application driven development Analysis Chemical Physical Mechanical Prototyping Engineering Materials Paints and Coatings Electrically Conductive Polymers Electro-Chemical Components Conductive Inks
Graphene(s)
Not all Graphene is created equal - Angstron Advertisement – JEC magazine March 2013
Manufacturing Method – Top down, bottom up
Chemistry – Purity, catalytic residue, doping, sp3/sp2 hybridisation
Structure – Crystallinity, substrate, flatness
Functionality – Electrical conductivity, mechanical properties,
Applications – Electronic, optical, mechanical, barrier, thermal
5 of 12
Material Layers Thickness SSA (BET)
HDPlas™ GNPs ~25 < 50 nm ~25 m2/g
HDPlas™ FLG700 ~5 < 10 nm ~ 700 m2/g
2D Graphene 1 < 0.5 nm ~ 2,630 m2/g
Graphene Functionalisation
Why Functionalise?
Pristine graphene and graphene like materials are inert
Help with dispersion, thickness reduction, segregation of particles
Application improvements
6 of 12
Fang et al. J. Mater. Chem., 2009,19, 7098-7105 DOI: 10.1039/B908220D
7 of 12 Video Slide
Plasma Functionalisation Robust and massively tailor-able
(gases, liquids, metals)
High yield and scalable
Environmentally friendly
Almost any substrate
(including nano powders)
8 of 12
Fraunhofer: www-alt.igb.fraunhofer.de/www/gf/grenzflmem/plasma/en/PlasmaImpact.en.html
HDPlas™ Standard Functionalisation
Product Process Gas Functionalities Applications
O2 Oxygen
Carbonyl [C=O]
Hydroxyl [OH]
Ether [R-O-R]
Cleaning, activation, etching, reducing undesirable inclusions.
Improves compatibility with polar solvents.
Dot Argon Radicals Cleaning, activation, pre-cursor for further treatments.
NH2 Ammonia
Primary Amine [NH2]
Amide [RCONH2]
Nitrile [C≡N]
Compatibility with some epoxy composites, solvent dispersions,
electrochemical applications.
N Nitrogen
Nitrous Oxide [NOx]
Imine [=C=N]
Amines [NHx]
Polymer compatibility, solvent dispersions, surface cleaning,
semiconductor doping.
F Tetrafluoromethane Fluorinated Carbon
(CF)n
Producing hydrophobic surfaces; aggressive pre-treatment; insulating
properties (characteristics similar to Teflon).
COOH Acid Vapour Carboxyl [COOH] Polymer compatibility, reactive surfaces, pre-treatments.
9 of 12
HDPlas™ Special Functionalisation
Product Process Gases Functionalities Applications
Metallic Sputtering N/A
Metallic solutions
Gold
Silver
Platinum
Conductivity enhancements,
electrochemical applications
Epoxide Plasma Epoxide glycidol Epoxy Groups Epoxy Composites
Silicon Plasma Silanes C-Si Li-Ion batteries
Pure Graphene Hydrocarbons
(Reducing agents) Inert Defect free graphene?
Plasma
Polymerisation Monomers Polymers Seamless nano-matrix composites
10 of 12
As materials approach the nano-scale, their surfaces play a more and more important role. Modifying these surfaces allows us to improve the compatibility between the nano material and the matrix, to enhance the electrical or electrochemical properties and enable our graphenes in applications.
HDPlas™ Graphenes in Action
FLG700 NH2 – Platinum Replacement in DSSC
FLG700 O2 – Conductive Transparent Films (ITO Replacement)
GNP COOH – Corrosion inhibitors in coatings
GNP O2 – Barrier properties in PE, PP, Epoxy
GNP NH2 – Conductivity enhancer in conductive inks
GNP O2 – Mechanical enhancer in PE, PP, Epoxy Adhesives
GNP COOH – Mechanical enhancement in fibre composites
GNP dot – Thermally conductive additive for thermal adhesives
Don’t forget MWCNTs, SWCNTs, Zinc Oxides!
11 of 12
Thanks for Listening
Any Questions?
Martin Williams:
Tel: +44 (0) 753 606 5637
Email: [email protected]
Web: www.haydale.com
Blog: haydale.wordpress.com – download
12 of 12
