Please follow this link to Juliana's current resume.
My current work focuses on applying design concepts found in nature to the creation of new materials for personnel protective systems. In particular, we are focusing on creating materials that exhibit (i) sacrificial bonds and hidden lengths, (ii) graded structures and (iii) order at several length scales. For goal (i), we are working with a poly(N-vinyl imidazole) polymer system which can be readily complexed with metal ions. In particular, we want to characterize the effect of metal-ion complexation on the mechanical properties of the polymeric material. In order to do this, we have developed a method that allows us to create samples with macroscopic dimensions and are currently developing a technique to complex these samples.
Efforts (ii) and (iii) are in collaboration with Tony Evans and Frank Zok at UCSB and with HRL Laboratories. We hope to create a composite material that combines the energy-absorbing capabilities of a lattice with the smooth compression behaviour of a stochastic foam. In order to achieve this, we are using polymeric microtruss lattices created by HRL and incorporating them into a composite.
bernalostos [at] engineering.ucsb.edu