5World paint market 85,7 billion USD. Coatings with nanomaterials around 1 billion USD.Nanoposts.com 2007
6Challenges in the coatings market Customers expectationsEco-efficiency and sustainabilityNew scientific discoveriesINNOVATION, CHANGE(Water-borne systems!)Customers ecpect more from the coating than protect and beautyfy a surface, Higher performance products, easier to use ,Together with legislators and regulators, Customers increasingly expect a greater level eco efficiency of sustainability of products and the way they are producedin the production. Industry has to look to alternatives to petrochemical raw materials, reduce the carbon footprint and is facing a lot of regulatory attention connectet to VOC limits and REACHscientific discoveries and fast development of material sciance is setting new targets and possibitities
7History of Nanomaterials Lycrugus cup with diffused lightLycrugus cup with focused lightLycurgus 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)
8Expectations for Nanotechnology in coatings Scratch resistanceAbrasion resistanceMechanical propertiesUV-ProtectionAntimicrobial(Self-cleaning)(Water repellence)Conductivity / AntistaticIR-Absorption / IR-ReflectionFluorescenceGas BarrierFlame retardencyMagnetic propertiesCarrier……Source: IRL
23Inorganic nanoparticles are difficult to stabilize in dispersion and in the resin. Compatibility problems during processing: agglomeration, turbidity, increased viscosityLimitating scope of applicability
24Coated metal oxides (example from flame synthesis) TiO2SiO2
25Nanoparticle functionalization Gerhard Jonschker et al , Merck KGaA,M. Steinbücher et al. HeliosJohn Texter et al
26Easy to clean surfaces: wetting bahaviour Superhydrofobic surfaces are characterized by low surface energy and the structuring that allows hardly any wettabilityHydrofilic surfaces are formed using TiO2 surfaces and require sun light for activation- outside aplicationFor inside use eg kitchen – oven hydrofobic surfaces are requiredInka Henze, Schott AG
28Bioinspired materials for self-cleaning and self-healing In practice regenaration of nano structure is a challenge
29Mechanical stability regenaration of nano structure is a challenge On awnings finished with Mincor® TX TT, dirt and water simply roll off - without leaving a trace.
30Self-healing coatings for corrosion protection Estimated cost of corrosion 300 billion USD per yearProf Braun Beckman Institute University of Illinois at UrbanaMechanical damageChemical mechanical limitationsCho, S.H., White, S.R. and Braun, P.V., Self-Healing Polymer Coatings, Advanced Materials 21, (2009).
31Nature is beautiful! nanostructures diffract the light, Butterfly wing: Color without dye is the mystery presented by the luminous blueMorpho butterfly. Its wings are covered with tiny. Unlike chemicalpigments, these physical colors never fade. This property also makes them interestingfor BASF researchers who are engaged in reproducing the effect with crystallinedispersion coatings. The distance between the crystal layers determines the interferenceand ultimately the color of the coating. Other applications for films thatchange their color when stretched are now being evaluated at BASF.nanostructures diffract the light,interference eliminate all the colors except blue