[HTML][HTML] Layered liquid crystal elastomer actuators

T Guin, MJ Settle, BA Kowalski, AD Auguste… - Nature …, 2018 - nature.com
T Guin, MJ Settle, BA Kowalski, AD Auguste, RV Beblo, GW Reich, TJ White
Nature communications, 2018nature.com
Liquid crystalline elastomers (LCEs) are soft, anisotropic materials that exhibit large shape
transformations when subjected to various stimuli. Here we demonstrate a facile approach to
enhance the out-of-plane work capacity of these materials by an order of magnitude, to
nearly 20 J/kg. The enhancement in force output is enabled by the development of a room
temperature polymerizable composition used both to prepare individual films, organized via
directed self-assembly to retain arrays of topological defect profiles, as well as act as an …
Abstract
Liquid crystalline elastomers (LCEs) are soft, anisotropic materials that exhibit large shape transformations when subjected to various stimuli. Here we demonstrate a facile approach to enhance the out-of-plane work capacity of these materials by an order of magnitude, to nearly 20 J/kg. The enhancement in force output is enabled by the development of a room temperature polymerizable composition used both to prepare individual films, organized via directed self-assembly to retain arrays of topological defect profiles, as well as act as an adhesive to combine the LCE layers. The material actuator is shown to displace a load >2500× heavier than its own weight nearly 0.5 mm.
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