But, simply building larger blades isn't a smart answer. In order to achieve the expansion expected in the market for wind energy, turbines need a bigger share of the wind. "The idea behind all this is the need to develop stronger and lighter materials which will enable manufacturing of blades for larger rotors," Loos said. Using a small commercial blade as a template, he manufactured a 29-inch blade that is substantially lighter, more rigid and tougher. He wanted to be sure the composite that was scoring best on preliminary tests could be molded into the right shape and maintain properties. On his own, Loos went to the lab on weekends and built the world's first polyurethane blade reinforced with carbon nanotubes. in Ashtabula, Ohio, comparing the properties of new materials with the current standards used in blade manufacturing. Marcio Loos, a post-doctoral researcher in the Department of Macromolecular Science and Engineering, works with colleagues at Case Western Reserve, and investigators from Bayer MaterialScience in Pittsburgh, and Molded Fiber Glass Co.
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