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Journal of the American Chemical Society, 2005 , accepted

2.5nm. Reinforced Biopolymers for Nanocomposite Construction and Materials Science and Engineering Curriculum Development Darrin J. Pochan, University of Delaware DMR-0348147.

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Journal of the American Chemical Society, 2005 , accepted

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  1. 2.5nm Reinforced Biopolymers for Nanocomposite Construction and Materials Science and Engineering Curriculum Development Darrin J. Pochan, University of DelawareDMR-0348147 In the first 1.5 years of the award, we have accomplished two preliminary objectives. First, we have developed the first designs of synthetic peptides that controllably assemble into rigid, fibrillar morphologies. These fibrils are similar to structures observed in natural diseases such as Alzheimer’s disease. We will soon use these structures for reinforcement of polymer matrices to make nanocomposites. Second, we have produced nanocomposites from biodegradable polymers and natural clays and studied the matrix crystallization behavior. Understanding this behavior will be critical in understanding the behavior of these same “green” polymers when they are reinforced with the peptide fibrils for completely biodegradable composites. 2.5nm 7nm Fibril Growth Axis (b-Sheet Formation) 4.7 Å Lamination Direction (Filament Stacking) Journal of the American Chemical Society, 2005, accepted Macromolecules, 2004, 37 (17), 6480 -6491 Macromolecules, 2005, 38 (15), 6520 -6527 Transmission electron micrographs and schematic of peptide fibrils assembled from designed peptides. The local nanostructure is a bilayer of extended peptide with hydrophobic interior.

  2. Reinforced Biopolymers for Nanocomposite Construction and Materials Science and Engineering Curriculum Development Darrin J. Pochan, University of DelawareDMR-0348147 Education Under this grant, two students, Matthew Lamm and Rohan Hule, are being supported towards their Ph.D. dissertations. The students are getting experience in an interdisciplinary fashion, learning peptide synthesis and biomaterials research in the lab of a peptide collaborator. In addition, they are working on constructing and characterizing engineering materials. In addition, the grant has partially supported a recent Ph.D. student who has graduated and is currently performing post-doctoral research at MIT with Prof. Edwin Thomas. In addition, curriculum development in the young (originated in 1998) MSEG department at U. of Delaware is expanding with a new advanced polymer science course in the process of being created. • Outreach • To this point, 3 peer-reviewed publications have been published to disseminate the results from this research and provide an educational tool for the students involved. • Each Ph.D. student supported by this CAREER award has given at least two oral presentations at external scientific conferences.

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