Showing posts from November, 2011

Zeolite nanosheets

Zeolites Zeolites are materials that are traditionally used as absorbents, catalysts and as a filter for several decades. Zeolites are micro porous crystalline alumino silicates and widely used in petrochemistry and fine-chemical synthesis because strong acid sites within their uniform micro pores enable size- and shape-selective catalysis. In spite of this there have been substantial challenges in processing zeolitic materials into extended sheets that remain intact. Zeolite nanosheets Efforts to create zeolite nanosheets which are very small sieves to separate molecules from one another have proved rather fruitless as the processes used so far tend to result in the creation of holes in the sheet that are too large to capture the desire molecules. The result of blending the two layered zeolites silicate and its other component by melting them together is a nanocomposite that has two unique kinds of nanosheets. When making zeolites, the polystyrene in the mix is removed and this result

Nanotechnology helps devise Anti-Fog Glass

Fog problems There has never been a good solution for clearing fogged-up windshields of vehicles. Car windows, eyeglasses, camera lenses, a windscreen or a pair of glasses even bathroom mirrors keep fogging up. More than just a nuisance, fogging can pose a driving hazard. Glass fogs up when warm, moist air comes into contact with glass and cools so that thousands of tiny water droplets form on the glass. The droplets scatter light, making oncoming traffic hard to see. Most current solutions don't work: anti-fogging sprays are short-lived; and windshields coated with titanium dioxide require exposure at least every few hours to ultraviolet light to work. Eliminating fog The existing technologies for example put different types of materials onto that lens that promote this spreading of water using materials that really like water, in fact in some cases the very same materials that are used in diapers are used on the surfaces of lenses, for example, because they love to draw water and

Nanocoating to resists explosion and fire

The US Navy wanted to find new ways to protect ships using coatings and polymers that could shield against explosions and fire. A research took off after the 9/11 attacks, with the new coating applied to rebuilt sections of the Pentagon. Office of Naval Research developed the coating with NanoSonic Inc., of Pembroke, VA. Harnessing nanotechnology and polymer science, the Navy has helped develop a spray-on protective coating that, depending on application thickness, makes surfaces blast-, ballistic- and fire-resistant. Technology NanoSonic makes the material using a patented, environmentally friendly, room-temperature nano-technology manufacturing process. The surface technology is called HybridSil Fire/Blast and acts like a force field that surrounds to protect any type of surface. Any existing material can be completely changed to make it more useful for the warfighter. Properties Few available materials provide explosions and fire resistant feature, but not both, since the propertie