ME Faculty Candidate Lewis Cox Research Seminar
- Wednesday, February 14, 2018 at 3:10pm
- Roberts Hall, Room 307 - view map
Network Reconfiguration in Smart Polymeric Materials
Abstract: Smart polymeric materials, including shape-memorizing, shape-morphing, and dual-curing polymer networks exhibit different network reconfiguration mechanisms that produce unique, stimuli-responsive behaviors. Network reconfiguration, wherein chain conformation and crosslink topology can be explicitly controlled, is a broadly applicable, but rarely exploited tool to connect material structure and properties to bulk performance. It provides the mechanical building blocks needed to turn rudimentary as-polymerized specimens into novel, advanced materials and devices. In this talk, control over energy storage and dissipation mechanisms, microstructure characterization, and bulk material testing techniques are combined to comprehensively measure and illustrate the capabilities of emerging polymeric materials. Shape memory Janus particles, optically tunable surface topographies, composite fillers with covalent adaptive interfaces, crack guiding heterostructures and the future of additive manufacturing processes are all discussed within the context of polymer network reconfigurations.
Bio: Dr. Lewis Cox received B.S. and M.S. degrees in the Engineering Mechanics department at Virginia Tech in 2009 and 2011, following a mechanics of materials track. In 2016, he completed his Ph.D. in the Mechanical Engineering Department at the University of Colorado Boulder. During this time, Lewis received the Dean’s Outstanding Merit Fellowship and the Material Science Engineering Fellowship awarded by the National Institute of Standards and Technology (NIST) to research energy storage and dissipation in smart polymer microparticles. He worked as a postdoctoral researcher in the University of Colorado’s Chemical Engineering Department in 2016, characterizing mechanical performance of emerging smart polymer chemistries poised to impact additive manufacturing industries. Lewis was awarded the National Research Council’s Research Associateship Award and began working at NIST in 2017 where he currently serves as a Postdoctoral Fellow and Materials Research Engineer, leveraging atomic force microscopy techniques to understand structure, adhesion and fracture of network-reconfigurable soft materials.
- Department of Mechanical & Industrial Engineering