(774c) Bio-Inspired Design of Stimuli Responsive Materials Based on a Bilayer Structure | AIChE

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(774c) Bio-Inspired Design of Stimuli Responsive Materials Based on a Bilayer Structure

Authors 

Sun, L. - Presenter, University of Connecticut
Zeng, S., University of Connecticut
Li, R., University of Connecticut
Zhang, D., University of Connecticut
Huang, W., Heyuan Polytechnic
Wang, Z., University of Connecticut
Freire, S., University of Connecticut
Smith, A., University of Connecticut
Huang, E., University of Connecticut
Nguon, H., University of Connecticut
Yu, X., South China Agricultural University
A bilayer structure composed of polyvinyl alcohol (PVA) or PVA composite thin film atop thick polydimethylsiloxane (PDMS) substrate was prepared. The bilayer structure shows dynamic strain-responsive optical properties. The transition between a transparent state to an opaque state can be easily achieved by uni-axially stretching and releasing the device. Also, a series of derivative mechanochromisms with capabilities of switch “on/off” fluorescence, change fluorescent color, reveal/hide information upon mechanical stimuli are prepared. Mechanical or/and moisture responsive wrinkling surface can also be achieved in a similar manner. By altering the chemical structure of the PVA top layer, three different moisture responsive dynamic wrinkling surfaces can be prepared. Selectively inducing chemical modification on the PVA surface can create moisture responsive patterned wrinkles, which can lead to applications in encryption, anti-counterfeit tab, and water indicator for circuits.

Topics 

Materials
Chemicals & Materials

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