Detailed Information

Biomimetic microactuator powered by polymer swelling

Cited 3 time in Web of Science Cited 4 time in Scopus

Lee, Howon; Xia; Fang

Issue Date
American Society of Mechanical Engineers
ASME International Mechanical Engineering Congress and Exposition, Proceedings, Vol.13 No.PART B, pp.765-769
We propose novel biomimetic polymer microactuators. The actuation mechanism is inspired by nastic movement of the moving plant, Mimosa pudica, which folds its leaves upon external stimulus by regulating turgor pressure of cells in specific location. Photo-cured poly(ethylene glycol) diacrylate (PEGDA) microactuator is fabricated using projection microstereolithography (PμSL) capable of complex 3D micro fabrication. The swelling effect of PEG in water and organic solvent is exploited as an actuation mechanism of the device. Stress relaxation in the structure due to solvent absorption is controlled locally by delivering solvent through microfluidic channels embedded in the actuator, thereby generating a net movement in the device. Timescale of the motion derived from analytical swelling model suggests that actuation speed can be effectively increased by scaling down the actuator because the characteristic swelling time depends on the length as L2, which is verified experimentally. Copyright © 2008 by ASME.
Files in This Item:
There are no files associated with this item.
Appears in Collections:

Related Researcher

  • College of Engineering
  • Department of Mechanical Engineering
Research Area Additive Manufacturing, Architected Materials, Programmable Matter


Item View & Download Count

  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.