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Título

Accordion-like actuators of multiple 3D patterned liquid crystal polymer films

AutorHaan, L. T. de; Sánchez-Somolinos, Carlos; Broer, Dirk, J.; Schenning, Albertus P. H. J.
Palabras claveLiquid crystals
Actuators
Finite-element analysis
Polymer networks
Fecha de publicación2014
EditorWiley-VCH
CitaciónAdvanced Functional Materials 24(9): 1251-1258 (2014)
ResumenThis work describes the fabrication, characterization, and modelling of liquid crystalline polymer network films with a multiple patterned 3D nematic director profile, a stimuli-responsive material that exhibits complex mechanical actuation under change of temperature or pH. These films have a discrete alternating striped or checkerboard director profile in the plane, and a 90-degree twist through the depth of the film. When actuated via heating, the striped films deform into accordion-like folds, while the film patterned with a checkerboard microstructure buckles out-of-plane. Furthermore, striped films are fabricated so that they also deform into an accordion shaped fold, by a change of pH in an aqueous environment. Three-dimensional finite element simulations and elasticity analysis provide insight into the dependence of shape evolution on director microstructure and the sample's aspect ratio.
URIhttp://hdl.handle.net/10261/118029
DOI10.1002/adfm.201302568
Identificadoresdoi: 10.1002/adfm.201302568
issn: 1616-301X
e-issn: 1616-3028
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