Today's best molecular filters, siliceous zeolites, filter gases too slowly to be of much use for everyday applications. So researchers at Carnegie Mellon University in Pittsburgh, PA, have an alternative solution: carbon nanotubes. Using atomistic simulations, David Sholl and associates calculated both self- and transport diffusivities of light gases in carbon nanotubes and in two zeolites with comparable pore sizes. The carbon nanotube filter gases 100 to 1,000 times faster than siliceous zeolites or any microporous material for which experimental data are available. This increased speed implies that nanotubes could provide a practical way to make large-scale gas filters, says Sholl. For more information, e-mail David S. Sholl at firstname.lastname@example.org.
The new composites manufacturing innovation center is intended to be a source of grand challenges for industry, like the kind that got us to the moon under JFK. These aren't the words its new CEO Craig Blue used, but that's the idea and the vision behind the Institute for Advanced Composites Manufacturing Innovation (IACMI).
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.