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Nanocapsules as controlled release systems for coatings
Describes membrane emulsification and LBL (layer-by-layer) formation of nanocapsules which have possible use in very thin coatings and for drug delivery. Graphs show reflectance data over 6000sec during alternating deposition of species in presence of zinc, barium & sodium cations. Zeta potential meas'ts shown as function of alternating layers on capsule core, ellipsometry measures layer thickness. pH tuneable capsule layers are detailed and controlled release can be remote, light-triggered. Sketches show metal coated with corrosion-resisting nanocapsules and medical coatings. 7 refs
Nanocapsules for controlled release from coating systems
Sketches show layer-by-layer deposition techniques for shell formation around an emulsion droplet, & principle of emulasion preparation by membrane emulsification. Zeta potentials & reflectance are discussed. Sketch shows capsules with pH-tunable shells. Remotely-triggered release by light emission from a fluorescent dye. Metal-matrix composite coating with nano-capsules for corrosion protection & coatings for medical applications with anti-proliferating properties. 7 refs
Nanocarbon/aluminium composite material, process for producing the same, and plating liquid for use in said process.
Electrodeposition of title composite from aprotic electrolyte, imidazolium halide deriv. (ionic liquid) at temperatures up to 300°C. Graph shows hardness vs. deposition conditions.
Nanoceramic coatings produced by laser treatment
Ceramic titania, silica and alumina coatings were produced by depositing sol-gel coatings on a substrate and then densifying with furnace or laser treatment. Failure mechanisms are discussed.
Nanoceramic conversion coating
Note on new Henkel patented nanoceramic coating aimed as replacement for iron phosphating. Free from phosphates & heavy metals, it offers better corrosion protection & paint adhesion than Fe phosphates. Operates at RT and required reduced effluent treatment investment.
Nanoceramic treatment instead of phosphating and chromating.
The principles of a proprietary system are described. The system includes nanoceramic particles, and provides a reduction in costs relative to conventional phosphating processes. Some examples of the system are presented.
Nanoceramic-Based Conversion Coating in the Paint Shop.
New generation of conversion seeks to replace phosphating and allows production of thin nanometer range coatings, (phosphate layers are within the micrometre range). The new system is based on the combination of a nanostructured metallic oxide of ceramic type, with metals such as titanium and zirconium. The application process for coating the metal surface is described together with the performance of the nanoceramic coating.
Nanocoating for electronics of the future: OrmeSTAR Ultra Nanofinish
So-called organic metal conductive polymer is described. Derived from Ormecon technology, e.g for passivation of copper. Coulometric potential-time plots are shown for electroless copper, silver, and Nanofinish, incl. effect of variable deposition time of the Nanofinish. XPS depth profile data are plotted. Chart shows effect of metallic and oxidised copper on solder reflow. Meas't of Kelvin potentials is described, table lists values for copper, fresh & oxidised, and silver coated. Various aspects of solderability are detailed, photo shows press-fit, force-displacement diagrams are shown. Disc'n of the environmental impact of the process. 7 refs
Nanocoating on filaments by electrospinning.
SURF Coatings by different techniques, mainly in the form of films or particles, have been extensively used to functionalize filaments in the textile industry. In this study, electrospinning was employed to coat polymeric nanofibres on Poly (ethylene terephthalate) multi- and mono-filaments. The parameters in the coating process including solution concentration, coating time, coating distance, electric field and flow rate, were systematically investigated to determine their effects on the resultant coating. The coating morphology and durability were examined by means of scanning electron microscopy and abrasion testing, respectively. Results showed that nanofibres coating on filaments with various morphologies, exhibiting some degree of durability was achieved.
Nanocoatings for corrosion protection
Overview of EU Multiprotect project which exists to develop nanoparticle-based corrosion protective coatings. 3 types of amorphous oxide particles were developed, typically based on titanium & cerium, 4-5nm in size. Photos show scribed coated panels after 3000 hrs salt spray. In another strategy, sol-gel coatings with nanoparticles were developed. Also nickel-matrix composites with nm c-boron nitride particles as hard chromium alternative. Self-healing was noted in some coatings & multilayer systems were also reported. Use of some of these in aerospace (EADS) applications is shown. 20 refs
Nanocoatings for Engine Application.
SURF Review of engineering coating for engine application addresses issues relating to dimensional stability, tribological properties, lubrication, coefficient of friction, hot hardness, amenability for honing, surface roughness and topography, residual stress, adherence, damage toleranjce and resistance, pores density and conditions and cost. Advantages and limitations of conventional materials systems and techniques such as chemical-vapor-deposited diamond-like carbon (DLC) coating, plasma sprayed metal matrix composite coating, tribologically functional ceramic coatings, etc are noted. Nano-grains of a crystalline phase promise to solve several problems present in conventional coatings. In addition, surface-related problems for high performance engines and hydrogen powered automotive engines are examined.
Nanocomposite and nanostructured films with plasma polymer matrix.
Nanocomposite coatings of Ti/C:H plasma polymer particles providing a surface with variable nanoroughness.
Nanocomposite films prepared by arc-plasma deposition of titanium and carbon.
PROT The composition, structure, and properties of films prepared by depositing both titanium and carbon have been investigated. It was found that the films consist of an amorphous carbon matrix with uniformly distributed therein nanoparticles of titanium carbide (less than or equal to 20 nm in size). With increasing carbon concentration above 20 wt %, the film density decreases and the microhardness of the films increases, which reflects the diamond-like nature of the amorphous constituent of the composite film.
Nanocomposite gold/poly(ethylene oxide)-like plasma polymers prepared by plasma-assisted vacuum evaporation and magnetron sputtering.