Collapsing Colloidal Gels: How and When?

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dc.contributor.author Russel, William B.
dc.date.accessioned 2012-04-12T19:55:45Z
dc.date.available 2012-04-12T19:55:45Z
dc.date.issued 2012-03-15
dc.identifier.uri http://hdl.handle.net/1853/43263
dc.description The 25th annual Ashton Cary Lecture was presented on March 14, 2012 from 4-5 pm in room G011 of the Molecular Science and Engineering Building on the Georgia Tech Campus. en_US
dc.description William B. Russel is the A.W. Marks ’19 Professor in the Department of Chemical Engineering and Dean of the Graduate School at Princeton University. He joined the faculty at Princeton in 1974 after receiving BA and MChE degrees from Rice University and a doctoral degree from Stanford University. During his tenure at Princeton, Russel has served as chairman of the Department of Chemical Engineering and director of the Princeton Materials Institute. Additionally, he was president of the Society of Rheology and chair of the board of the directors of the Council of Graduate Schools. Currently, Russel is on the board of trustees of the Bermuda Institute of Ocean Sciences and the international advisory panel of the A*STAR Graduate Academy. Russel’s research focuses on the field of complex fluids, with primary emphasis on concentrated colloidal dispersions. He explores the effects of hard-sphere electrostatic depletion and adhesive interactions on phase behavior and rheological properties. Russel has directed the research of 36 PhD graduates and a dozen postdoctoral fellows who are now successful in industrial and academic careers. The author of The Dynamics of Colloidal Systems and a co-author of Colloidal Dispersions, Russel also served as the 2001 Debye Lecturer at Van’t Hoff Laboratory at Utrecht University. Sabbaticals have taken him to the Australian National University, the University of Wisconsin, Bristol University, Twente University, and Utrecht University. Consulting engagements with Rohm and Haas, the DuPont Marshall Laboratory, the W.R. Grace Washington Research Center, and Essilor have complemented his academic research. Among his numerous awards and honors, Russel received the 1992 William H. Walker Award from the American Institute of Chemical Engineers (AIChE), the 1999 Bingham Award from the Society of Rheology, the 2007 Award for Colloid and Surface Science from the American Chemical Society, and the 2010 Alpha Chi Omega Award from the AIChE. In 1992, he was inducted into the National Academy of Engineering, and in 1995, he was elected a member of the American Academy of Arts and Sciences.
dc.description Runtime: 50:44 minutes
dc.description.abstract Drying colloidal dispersions by evaporating the liquid to create particulate solids, porous coatings, or continuous films is common to a number of important technologies, ranging from applying latex paint and manufacturing photographic film to depositing highly porous coatings on ink jet papers and fabricating photonic crystals from silica sols. The objective is generally to create a layer of specified thickness and controlled porosity with permeability, strength, transparency, or other physical properties. Both the understanding and implementation of drying processes have advanced considerably in the past two decades. Yet processing still raises a number of interesting and difficult issues because of conflicting constraints and performance properties. The focus of this talk is the complex phenomena that emerge as evaporation drives fluid flow in the thin film. Rapid evaporation can segregate binary mixtures or create an impermeable skin at the surface. Slower evaporation produces a porous packing subject to a rising capillary pressure that deforms the particles. Elastic deformation can cause cracking and peeling, while a viscous response can produce a pore-free solid. en_US
dc.format.extent 50:44 minutes
dc.language.iso en_US en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Chemical engineering en_US
dc.subject Colloidal films en_US
dc.subject Continuous films en_US
dc.subject Particulate solids en_US
dc.subject Porous coatings en_US
dc.subject Silica sols en_US
dc.title Collapsing Colloidal Gels: How and When? en_US
dc.type Lecture en_US
dc.type Video en_US
dc.contributor.corporatename Georgia Institute of Technology. School of Chemical and Biomolecular Engineering
dc.contributor.corporatename Princeton University


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