Disperse & align carbon nanotubes.NASA NASA: see National Aeronautics and Space Administration. NASA in full National Aeronautics and Space Administration Independent U.S. and mechanical engineers at the University of' Maryland (College Park) say they have achieved "nearly perfect" dispersion of alumina alumina (əl  `mĭnə) or aluminum oxide, Al2O3, chemical compound with m.p. about 2,000°C; and sp. gr. about 4.0. micro-particles and uniform dispersion of carbon nanotubes in polystyrene on a twin-screw extruder. They used a Werner & Pfleiderer machine with special high-shear screws from Coperion Corp., Ramsey, N.J. Particularly remarkable was the uniform dispersion of carbon nanotubes, which normally cling to Verb 1. cling to - hold firmly, usually with one's hands; "She clutched my arm when she got scared"hold close, hold tight, clutch hold, take hold - have or hold in one's hands or grip; "Hold this bowl for a moment, please"; "A crazy idea took hold of each other. Data were presented tat this year's SPE SPE - Software Practice and Experience ANTEC meeting by graduate student Arun Kota. He extruded film test strips with a 3-in.-wide die built by NASA. The die has 30-micron square micro-channels designed to orient the nanotubes. Results so far indicate a 1000-fold increase in film strength and [10.sup.8] times higher electrical conductivity. Kota: (301) 405-8870/e-mail: arunkota@umd.edu * Coperion: (201) 327-6300/PT Direct: 789LZ |
|
||||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion