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Photo-Crosslinked Side-Chain Liquid-Crystalline Elastomers for Microsystems

✍ Scribed by Antoni Sánchez-Ferrer; Tamás Fischl; Mike Stubenrauch; Helmut Wurmus; Martin Hoffmann; Heino Finkelmann

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
461 KB
Volume
210
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Photo‐crosslinkable side‐chain liquid‐crystalline polymers (LCPs) containing photoreactive benzophenone cores are synthesized in order to obtain their corresponding side‐chain liquid‐crystalline elastomers (LCEs). This strategic synthesis allows thin elastomeric films and their integration into microsystems for actuators and micromachines to be obtained. As an example of this principle, a gripper was developed. The position of its arms can be changed by applying voltages from 1.5 to 3.5 V at different rates. Small changes in the liquid‐crystalline elastomer film cause strains of up to 150% in the microdevice and the capacity to move up to 400 times its own mass due to the nematic‐to‐isotropic transformation.

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