nanotechnology in coatings dr. peter venturini, assistant professor helios domžale, d.d. research...
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Nanotechnology in coatings
Dr. Peter VENTURINI, Assistant Professor
Helios Domžale, d.d. Research and Development
one of the largest producers of paint, lacquers and synthetic resins in Central Europe
STRUCTURE OF SALES
Powder coatings3%
Boat paints 1%
Masterbatch0%
Metal coatings13%
Wood coatings6%
Decorative coatings
28%
Refinishing coatings
14%
Adhesives and straches
4%Road-marking
paints3%
Industrial Coatings27%
Synthetic resins23%
Automotive OEM5%
INCREASE OF SALES
0
20.000
40.000
60.000
80.000
100.000
120.000
140.000
160.000
180.000
200.000
IN T
ON
S
0
50.000
100.000
150.000
200.000
250.000
300.000
350.000
400.000
in 0
00 E
UR
Total in TONS Total in 000 EUR
Total in TONS 39.422 42.363 45.357 49.176 54.116 66.350 72.134 92.802 127.438 142.968 152.392 163.830 173.997
Total in 000 EUR 66.782 71.717 73.091 82.110 91.568 114.324 133.160 169.054 229.595 259.364 311.796 350.904 353.622
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 est. 2008 pl.2009
• World paint market 85,7 billion USD.
• Coatings with nanomaterials around 1 billion USD.
Nanoposts.com 2007
Challenges in the coatings market• Customers expectations
• Eco-efficiency and sustainability
• New scientific discoveries
INNOVATION, CHANGE(Water-borne systems!)
Lycurgus chalice 4th Century A.D. Appears green in reflected light and red if light is directed through it (70 nm particles of silver and gold in the glass)
Lycrugus cup with diffused light
Lycrugus cup with focused light
History of Nanomaterials
Expectations for Nanotechnology in coatings
• Scratch resistance• Abrasion resistance• Mechanical properties• UV-Protection• Antimicrobial• (Self-cleaning)• (Water repellence)• Conductivity / Antistatic• IR-Absorption / IR-Reflection• Fluorescence• Gas Barrier• Flame retardency• Magnetic properties• Carrier• ……
25%
6%
6%12%6%
45%
Scratch resistance Water-repellenceUV Protection Self cleaningAntimicrobial Others
Source: IRL
• TiO2
• Al2O3
• SiO2
• ZnO• Fe2O3
• CeO2
• CuO• ATO, ITO • Ag• ZrO2
• etc.
ZnO
TRANSPARENT!
Scratch resistance, UV Protection, Antimicrobial
Nanomaterials in coatings
Synthesis of nanomaterials
vezivo
Titanium dioxide (TiO2):
• micronized – white pigment
nano TiO2
ANATASEPhotocatalytic effect
RUTILEUV-protection
Nano rutile TiO2 transparent
formulation for wood UV protection
TiO2
cotrolWith nano rutile TiO2
ZnO for UV protection
Photocatalytic activity of TiO2
ANATASE
water contact angles of the surfaces before and after titania film deposition upon day-light illumination
without TiO2 with TiO2 thin film
Nanoadditives to improve Scratch Resistance
without nano SiO2
3,8% nano SiO2
After TA abrasion test After reflow efect
Inorganic nanoparticles are difficult to stabilize in dispersion and in the resin.
Compatibility problems during processing: agglomeration, turbidity, increased viscosity
Limitating scope of applicability
Coated metal oxides (example from flame synthesis)
TiO2
SiO2
Nanoparticle functionalization
John Texter et al . 2009
Gerhard Jonschker et al , Merck KGaA,Si O Si
O
SiOSiH3
OO
O
Si
Si
O
SiO
O
O Si
O
O
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
i-Oc(H2C)3NH2
i-Oc
i-Oc
i-Oc(H2C)3NH2
M. Steinbücher et al. HeliosM. Steinbücher et al. Helios
Easy to clean surfaces: wetting bahaviour
Inka Henze, Schott AG
Hydrophobic silane surface
Bioinspired materials for self-cleaning and self-healing
Mechanical stabilityregenaration of nano structure is a challenge
On awnings finished with Mincor® TX TT, dirt and water simply roll off - without leaving a trace.
Cho, S.H., White, S.R. and Braun, P.V., Self-Healing Polymer Coatings, Advanced Materials 21, 645-649 (2009).
Self-healing coatings for corrosion protection
Estimated cost of corrosion 300 billion USD per year
nanostructures diffract the light, interference eliminate all the colors except blue
Nature is beautiful!