Wrinkling and snapping polymer surfaces

PMSE 147

Douglas P. Holmes, dholmes@mail.pse.umass.edu, Derek Breid, dbreid@mail.pse.umass.edu, Edwin P. Chan, epc@mail.pse.umass.edu, and Alfred J. Crosby, crosby@mail.pse.umass.edu. Department of Polymer Science and Engineering, University of Massachusetts, 120 Governors Drive, Amherst, MA 01003
For many current and future applications, it is desirable to have surface properties that adapt to their environment or change upon command. We have developed robust strategies to create patterns that can adapt their shape, distribution, or length scale to modify properties using mechanisms similar to “contact splitting” or “lotus-leaf” effects. These patterning methods not only display responsive mechanisms, but also demonstrate new, scaleable, and robust strategies for surface patterning, achieving patterns that are difficult if not impossible to attain with conventional methods. In this presentation, we briefly overview our research on surface wrinkling driven by osmotic pressure, and then focus on a new instability-driven patterning technique based on the buckling and crumpling of a surface-attached sheet.