Tech Exchange

Super Bulk Production of Single-Walled Carbon Nanotubes

Japan Industrial Technology Association Highly pure, single-walled carbon nanotubes (SWNTs) are mass-produced in bulk forms such as vertically aligned “forests” through a process called Super CVD, a supercharged chemical vapor deposition (CVD) process. Structures of carbon SWNT are patterned and their growth controlled using specialized methods and furnaces.

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Ruggedized Micro Spectrometer Module

Mutoh America Inc. Developed originally for color-matching inks on digital printers, Mutoh’s spectrometer modules offer a plug-in solution that carries its own ADC, MCU, and memory onboard. These devices employ an optical system different from most other spectrometers sold today: Mutoh’s patent-pending DP1 “digital prism” spectral sensor. This sensor replaces the traditional slit/grating/imager design with a single spectral imaging chip in a 1 × 9-mm footprint. Current designs can deliver 3-nanometer resolution with >4000:1 dynamic range and low signal-to-noise ratio. Deconvolution of the raw sensor data is handled by the integrated logic, delivering calibrated spectral data without the need for a back-end processor. These modules are rugged, highly customizable, low-cost even in small volumes, and offer a high degree of design versatility.

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Low-Cost “Green” Coatings Modify Metal Surfaces

GreenKote Greenkote coating technology is a coating method for steel and other metals that can replace a range of existing coating methods. The coating is environmentally friendly, and it is applicable to a range of base materials. In the process, parts are introduced to a rotating oven, along with powder. The powder content and the thermal cycle define the characteristics of the coating and surface. Atoms of the desired metal diffuse into the surface of the part, growing the coating from within the surface. The Greenkote technology has the following advantages over regular diffusion coatings: uses 90% less powder, uses 50% less energy and thermal cycle time, and there is a virtually infinite number of possible coatings.

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Positive-Locking Fastener

Phil-Lok Fastener Most locking fastener systems use some sort of vibrationresistant method to prevent fastener loosening. The most common method is the lock washer, in use for over 100 years. Although lock washers will inhibit rotation of the nut by increasing friction, they do not provide a positive rotation stopping force. Similarly, nylon inserts can increase frictional forces.

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Xyloy™ Injection-Molded Zinc/Aluminum Alloy

Cool Polymers Xyloy™ is an injection-molded zinc/aluminum alloy processed in conventional plastic injection-molding equipment and molds. The Xyloy technology enables 3D netshaped metal parts right from the mold. Xyloy requires no carriers or binders, and — unlike die-cast metal parts — imposes no secondary processing steps for out-of-the-mold finished parts. Strong, lightweight parts with walls as thin as 0.010" are obtainable, with no porosity, and are dimensionally stable to machined tolerances. The Xyloy technology enables existing plastic injection molding businesses to build new metal-based business within their existing injection-molding infrastructure.

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Low-Cost Conductive Papers and Nonwovens for Consumer Goods

Kimberly-Clark Inexpensive, easy-to-manufacture conductive papers, tissues, and nonwovens open new areas for resistively heated and disposable electronic consumer goods. The technology allows electric and electronic features previously too expensive for disposables to be built into consumer goods with lowcost, non-metallic materials. Applications include printed antennas, RFID technology as part of packaging, and disposable electronics such as single-use keypads. The material can be cut, sheeted, folded, or formed in conventional ways.

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Needle-Free Injection System Using Pyrotechnical Propulsion

PYROFAST is a needle-free injection system with pyrotechnical gas propulsion that provides accurate and comfortable drug delivery through the skin for intra-dermal, subcutaneous, and intra-muscular injections of liquid and solid (lyophilized) drugs. The needle-free injection occurs within 40 msec; a very fine, high-pressure jet stream of liquid medication painlessly penetrates the skin, depositing medication in the tissue beneath. Needle-free injection reduces skin trauma and pain, and leads to better patient compliance by eliminating the patient’s phobia of needles. PYROFAST technology does not cause bleeding, which is often experienced with a needle injection, thus eliminating the risk of transmission of bloodborne diseases. The gas generator of the PYROFAST system uses a chemical substance that, after activation, generates a gas to create a well-defined and reliable pressure profile suitable for the injection of liquid drugs. The gas puts pressure on a plunger in the injection ampoule of the Medication Unit, which pushes the liquid through the orifice of the nozzle. Get the complete report on this technology at: www.techbriefs.com/tow/200911b.html Email: nasatech@yet2.com Phone: 781-972-0600

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