Particle and Particle-Polymer Suspensions in Confined Geometries
Mon, Mar 11
2:00 PM — 3:15 PM
Steinman HallSteinman Hall 160 - Lecture Hall
Steinman Hall, 160
The Chemical Engineering Department would like to welcome Jacinta Conrad from the Univ. of HoustonUnderstanding the structure and transport properties of complex fluids in confined geometries, including micro- and nanochannels, pores, and drops, is important for technological, environmental, and physiological processes such as extrusion, water remediation, and drug delivery. When complex fluids are confined, the resultant changes in accessible volume and hence in entropy can affect the structural or flow properties. In this talk, I will discuss recent microscopy experiments exploring the effects of confining geometries on two types of model particulate systems. First, I will show how confinement affects the structure, dynamics, and flow properties of colloid-polymer mixtures, which are commonly used as models for attractive suspensions. Second, I will describe how confinement by porous media or by viscoelastic polymeric dispersions affects the diffusion of nanoparticles.
Jacinta Conrad received an S.B. in Mathematics from the University of Chicago (1999) and her M.A. (2002) and Ph.D. (2005) in Physics from Harvard University. From 2005--2009 she was a postdoctoral research associate in Materials Science and Engineering at the University of Illinois at Urbana-Champaign. She joined the Department of Chemical and Biomolecular Engineering at the University of Houston in 2010 as an Assistant Professor. Her current research focuses on the phase behavior, dynamics, and structure of particulate systems near surfaces. Systems studied include colloids, nanoparticles, bacteria, and bacteriophage, for applications in rapid prototyping, enhanced oil recovery, antifouling materials, and biosensing. She received an NSF CAREER award in 2012.