Graduate Seminars"Complex Dynamic Behavior of Macromolecules at Fluid-Solid Interfaces: The Utility of the Chemical Engineering Approach"Professor Maria Santore Thursday, November 12, 1998 1175 BENEDUM HALL - 11:00 a.m.When polymers or proteins adsorb onto surfaces from liquid solution, they acquire a variety of configurations, not all of which represent the true equilibrium state. As a result, the dynamic aspects of adsorbed polymers can be difficult to anticipate. This talk describes our attempts at measuring adsorption and exchange kinetics of adsorbed polymers, and demonstrates the utility of the classical chemical engineering approach to developing predictive treatments for dynamic behavior. Polyethylene oxide (PEO) is chosen as a model system, and it is shown that there are indeed a number of instances where simple transport-limited models accurately described the interfacial kinetics. In other instances, with PEO, adsorbed chain dynamics are more sluggish and require a more detailed polymer-physics perspective. |
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