MSE Seminar - Eugenia Kumacheva - University of Toronto

MSE Seminar
Event Date:
Monday, November 10, 2014 - 4:00pm to 5:00pm
Location:
Boggs B6

Title:  From Fibrous Biological Tissues to Adaptable Hydrogel Materials

Affiliation: The University Of Toronto

When:       November 10, 2014 @ 4:00PM (Refreshments in Lobby @ 3:30pm)

Where:      BOGGS B6

Host:          Vladimir Tsukruk

Abstract:

Plants possess a unique ability to adapt their shape to the changing ambient environment. Shape transformations are governed by the non-uniform accumulation of elastic energy and the release of localized stresses in plant tissue. The self-shaping behaviour of plants offers a useful paradigm for creating adaptable, actuating soft matter materials by-design, however currently, complex 3D shape transformations in soft matter are challenging and are limited mostly to simple folding or buckling. Being inspired by the remarkable structure-property relations in fibrous tissues of plants, we developed a nature-inspired strategy for the generation of complex 3D structures by stimuli-responsive composite hydrogels. In comparison with earlier works, large-scale shape transitions were achieved by utilizing small-scale fiber-like modulations in composition and structure of planar hydrogel sheets. A combination of different materials and stimuli was used to program well-defined shape transitions. Furthermore, small-scale features allowed us to "program" multiple stable shapes, each realized under a specific stimulus. This work constitutes a major step towards the preprogrammed design of adaptable soft materials with applications in sensing and actuation.

Biography:  Eugenia Kumacheva received her M.Sc. degree from the Institute of Chemical Technology (now Technical University) in Saint Petersburg (Russia). She did her Ph.D. research in Physical Chemistry of Polymers at the Institute of Physical Chemistry (Russian Academy of Science). After PhD defence, she joined the Department of Chemistry at the Moscow State University.

In 1991-1994 Eugenia Kumacheva was a postdoctoral fellow in the laboratory of Professor Jacob Klein at the Weizmann Institute of Science (Israel), where she studied surface forces in thin layers of simple liquids and polymers.

In 1995 she joined the group of Professor Mitchel Winnik in the Department of Chemistry at the University of Toronto, where she was involved in studies of morphology of multicomponent polymer systems.

In 1996 Eugenia Kumacheva joined the Department of Chemistry at the University of Toronto as an Assistant Professor. In 2005 she became a Full Professor.

She spent her first sabbatical in 2002 in Harvard University with Professor George Whitesides. She was Visiting Professor in Oxford University (2003), the University Louis Pasteur (Strasbourg) (2006), Moscow State University (2009), the University of Cambridge (2010) and the University of Bayreuth (Germany) (2011).

Eugenia Kumacheva serves or served on Advisory Boards in the Max Planck Institute for Polymer Research (Germany), Waterloo Institute of Nanotechnology (Canada), Advanced Science Institute (RIKEN) (Japan), Brookhaven National Laboratory (USA), Triangle Materials Science and Engineering Center (USA), and the Leibnitz Institute (Germany).

Host: Vladimir Tsukruk

Reception at 3:30 preceeding seminar outside Boggs B6