Accordion- like Actuators of Multiple 3D Patterned Liquid Crystal Polymer Films

作者：de Haan Laurens T^*; Gimenez Pinto Vianney; Konya Andrew; Thanh Son Nguyen; Verjans Julien M N; Sanchez Somolinos Carlos; Selinger Jonathan V; Selinger Robin L B; Broer Dirk J; Schenning Albertus P H J

来源：Advanced Functional Materials, 2014, 24(9): 1251-1258.

DOI：10.1002/adfm.201302568

• polymer networks
• liquid crystals
• actuators
• finite-element analysis

This 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%26apos;s aspect ratio.

• 出版日期2014-3