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Issue 9, 2014
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Shape-responsive liquid crystal elastomer bilayers

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Monodomain liquid crystal elastomers (LCEs) are shape-responsive materials, but shape changes are typically limited to simple uniaxial extensions or contractions. Here, we demonstrate that complex surface patterns and shape changes, including patterned wrinkles, helical twisting, and reversible folding, can be achieved in LCE–polystyrene (PS) bilayers. LCE–PS bilayer shape changes are achieved in response to simple temperature changes and can be controlled through various material parameters including overall aspect ratio and LCE and polystyrene film thicknesses. Deposition of a patterned PS film on top of an LCE enables the preparation of an elastomer that reversibly twists and a folding leaf-like elastomer, which opens and closes in response to temperature changes. The phenomena are captured through finite element simulations, in quantitative agreement with experiments.

Graphical abstract: Shape-responsive liquid crystal elastomer bilayers

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The article was received on 15 Jun 2013, accepted on 15 Nov 2013 and first published on 26 Nov 2013

Article type: Paper
DOI: 10.1039/C3SM51654G
Soft Matter, 2014,10, 1411-1415

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    Shape-responsive liquid crystal elastomer bilayers

    A. Agrawal, T. Yun, S. L. Pesek, W. G. Chapman and R. Verduzco, Soft Matter, 2014, 10, 1411
    DOI: 10.1039/C3SM51654G

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