We are proud to have supplied nanomaterials to many researchers all over the world, who in turn have published fascinating work using these nanoparticles and nanotubes. On this section of our website, we highlight some of this research, highlighting interesting techniques and applications that are achievable with our products, focusing in particular on areas of mechanical, thermal, electrical and biological properties. You can also check out a listing of a vast number of scientific papers that have used our materials.
Improved Mechnical Properties
Spurred by the promise of SiC nanowires' mechanical properties, M. Wieligor et al. used NanoAmor silicon carbide nanoparticles to develop two novel manufacturing protocols for the synthesis of silicon carbide nanowires. These SiC nanowire synthesis methods are based directly on SiC nanopowders and thus do not require catalysts or very high temperatures, providing a significant advantage over other methods such as carbothermal reduction (Si and CNTs), chemical vapor deposition, SiCl3 and CCl4 reactions, and so on. Roughly speaking, the authors' experimental method involved dispersion by ultrasonication in ethyl alcohol, sintering, heat treatment in air and KOH, and ultimately rinsing with alcohol and distilled water. Final results indicated that between the bulk crystal form and nanopowder form of SiC, there are no significant changes in Raman spectra dependencies with respect to temperature or pressure, but that once SiC nanowires are formed, differences do begin to appear. XRD was used to monitor the synthesis of the SiC nanowires during the process, and TEM images indicated that different nanowire diameters (20 nm and 200 nm) can be achieved as a function of sintering conditions.
Luoyang Tongrun silicon carbide nanoparticles were also used by W.L.E. Wong and M. Gupta, in their study of silicon carbide reinforcement of magnesium. Such composites are of interest because magnesium has lower density than even aluminum, providing a lightness that can be combined with exceptional strength and toughness if the appropriate type of nanoparticle reinforcement is chosen when designing a composite. The authors were the first to study the effect that different SiC length scales - i.e., different particle sizes - have on such a composite, looking at various mixtures of microscale and nanoscale SiC reinforcement particles. W.L.E. Wong and M. Gupta first used mechanical alloying to mix the magnesium and silicon carbide, followed by compacting, sintering and hot extruding. Testing (by thermomechanical analysis, microstructural characterization, X-Ray diffraction and Vickers microhardness) found that the nanoscale-based composites gave the best strength and ductility, and that a mixture of both microscale and nanoscale SiC will give the greatest overall microhardness.
Improved Thermal Properties
Z. Xia with the Eastman Chemical Company recently patented a composite polymer that uses NanoAmor titanium carbide nanoparticles. These polyester polymers and copolymers achieve improved reheating properties via the TiC particles, thereby addressing of the main challenges faced by the polymer industry, which is the processing of thermoplastics during manufacturing or packaging processes that require increased temperatures. Specifically, in reheat blow-molding the heat absorption efficiency of the polymer is improved through the addition of particles that absorb well in the wavelength region of 500 nm to 1500 nm, where the polymer by itself performs poorly. Using TiC particle sizes on the order of 50 nm, and with concentrations of 1 ppm to 500 ppm, a process was developed for the improvement of polyethylene-terephthalate-based beverage bottle molding, improving the reheating temperature by at least 5 degrees centigrade, which significantly reduces energy costs and increases production throughput.
Improved Electrical Properties
S. Ahmad et al. used the addition of nanosized TiO2 to improve the polymer electrolytes used in Li-ion batteries, an important research area that may yeild great breakthroughs in novel energy sources, with applications such as hybrid electric cars and electronic devices. The research team started with a gel-polymer electrolyte based on PMMA (polymethylmethacrylate), which allows for a solid-state device with high ionic conductivity and tunable mechanical stability, both of which are very important attributes for effective batteries. One of the existing problems with such polymer-based electrolytes is their viscosity, which can lead to some undesirable flow. By adding TiO2 nanoparticles to act as inert chemical fillers - they chose our TiO2-anatase for its stability and high surface area - the team found that ionic conductivity can be increased, without any negative effects on other electrochemical properties. Furthermore, the viscosity was increased by over 10 times, greatly reducing the previous flow problems of polymer-based electrolytes. Such improvements point the way to exciting future Li-ion batteries, based on TiO2-nanocomposite polymer electrolytes.
Improved Biological Properties
Zinc oxide nanoparticles, in suspension form, were used by L. Zhang et al. as antibacterial agents against the E. Coli disease-causing bacterium. The ZnO particles actually damage the E. Coli's membrane walls, while also being generally regarded as safe for human beings and animals. By studying the effect of varying particle sizes and concentration, the authors found that as one decreases the ZnO's diameter, the bacteriostatic activity is improved. Further advantages are brought by an increased ZnO concentration. Finally, the authors also note that dispersing the solution via PEG (polyethylene glycol) or via PVP (polyvinylpyrolidone) polymers allows for an improvement in solution stability, while at the same time maintaining the antibacterial benefits of ZnO. Such results have great promise for industries such as food, textiles, packaging and healthcare, as nanostructured inorganics' high-temperature, high-pressure stability begins to be fully exploited.
Yttrium Aluminum Oxide Nanopowder, Zinc Iron Oxide Nanopowder, Nanocrystalline Ribbons, Silicone Oxide Nanopowder, Iron Oxide Nanopowder, Cobalt Iron Oxide Nanopowder and many more are available here.