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Engineering Robust Nanocomposite Networks
Final rept. 1 Sep 2009-31 Aug 2014
GEORGETOWN UNIV WASHINGTON DC
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In this grant period we were able to make significant advances in our understanding of a number of issues related to the processing and proper ties of nanocomposite networks. We showed that a non-Brownian suspension of micron scale rods exhibits reversible shear-driven formation of disordered aggregates resulting in dramatic viscosity enhancement at low shear rates. We also developed a new technique, Boundary Stress Microscopy, to quantify the non-uniform surface stresses in sheared collagen gels. In our collaborations with other AFOSR supported research, we were able to show that native silk solutions can for fibers directly as a result of applied shear, that silk e-gels show remarkable elasticity and work hardening, and that the luminous mucous secreted by the marine worm Chaetopterus sp. behaves rheologically as a yield stress gel.
APPROVED FOR PUBLIC RELEASE