Commercially Available Nanomaterials for Inclusion

Session Correction

Wednesday, June 8 Session 31: Commercially Available Nanomaterials for Inclusion in Forest Products, Session Chair—B. Lyne Report on Pilot Plant, W. Hamad, FP Innovations

Plans for a Pilot Plant at AIFT, Y. Boluk, Univ of Alberta Nanomaterials from the Minerals Industry, P. Jones, IMERYS Efforts in Supplying Nanomaterials, A. Franey, Biovision

Change in properties at nanoscale • opaque substances become transparent (copper, TiO2) • inert materials attain catalytic properties (platinum, gold) • stable materials turn combustible (aluminum) • solids turn into liquids at room temperature (gold) • insulators become conductors (silicon)

Optical Applications transparent HRI inorganic-organic nano-composites, antireflective coatings, inorganic phosphors, UV absorption, IR absoption

Other thermal expansion, Magnetic Applications magnetic separation, drug delivery, MRI contrast agents

Nanomaterials for functional applications

barrier properties, HT and corrosion resistance viscoelastic properties, PSA Adhesives,

flame retardancy, Friction

Mechanical Applications Strong composite materials made from incorporating inorganic nano-fillers (carbon fibers, nanowires, nanorods, nanoplatelets) into organic matrix. Scratch resistant materials, hard materials etc.

Controlling the shape of nanoparticles with surfactants

rod

sphere

12nm iron oxide nanocubes (Scale bar is 20nm)

platelet

13 nm iron oxide nanospheres (Scale bar is 20nm)

Courtesy of Anwar Ahniyaz, YKI

Nanoparticle-based Clear Coat for UV Protection Newly developed ceria nanoparticlebased clear coat

Commercial clear coat with organic UV absorber

High refractive index transparent nanocomposite

Incorporation of HRI nanoparticle, for example, TiO2, into hydrogel effectively increases both mechanical strength and refractive index while still keeping its transparency

Superhydrophobic coatings

Lotus leaf

• •

One-step coating procedure to produce required hydrophobicity and roughness to achieve a contact angle of 150° Both macro and microscale roughness important (scale bar 20 μm) Courtesy of Agne Swerin,YKI

Superhydrophobic surfaces

Water repellency and self-cleaning via patented self assembly coatings Next step is oil repellency through advanced surface chemistry – avoiding the use of fluorocarbons.

New photonic bandgap pigments

Applications in: - camouflage - IR reflection - cosmetics - novel coatings Courtesy, Peter Alberius, YKI

Quantum dots • Confining electrons to smaller wells creates higher energies and bigger bandgaps • Fluorescence from decay of electrons excited by photons from UV to NIR varies in color depending on particle size • Thus, fluorescence of quantum dots can be tuned to wavelength of light

• Quantum dots can be functionalized to adsorb on tumors and size variation can give better definition

Available from sigma-aldrich Atomic No. Element Name Particle Size (nm) Nanopowder/Dispersion Prod. No. 6 C Carbon 99+% 30 nanopowder 633 100 Diamond 95+% ~3.2 nanopowder 63644 4 Diamond 97+% 3.5-6.5 nanopowder 63642 8 12 Mg Magnesium hydroxide 99.9%