NDLI: Natural fibres actuators for smart bio-inspired hygromorph biocomposites

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Natural fibres actuators for smart bio-inspired hygromorph biocomposites

Content Provider	Semantic Scholar
Author	Duigou, Antoine Le Réquilé, Samuel Beaugrand, Johnny Scarpa, Fabrizio Castro, Mickaël
Copyright Year	2017
Abstract	Hygromorph biocomposite (HBC) actuators make use of the transport properties of plant fibres to generate an out-of-plane displacement when a moisture gradient is present. HBC actuators possess a design based on the bilayer configuration of natural hygromorph actuators (like pine cone, wheat awn, Selaginella lepidophyll). In this work we present a series of design guidelines for HBCs with improved performance, low environmental footprints and high durability in severe environments. We develop a theoretical actuating response (curvature) formulation of maleic anhydride polypropylene (MAPP)/plant fibres based on bimetallic actuators theory. The actuation response is evaluated as a function of the fibre type (flax, jute, kenaf and coir). We demonstrate that the actuation is directly related to the fibre microstructure and its biochemical composition. The jute and flax fibres appear to be the best candidates for use in HBCs. Flax/MAPP and jute/MAPP HBCs exhibit similar actuating behaviours during the sorption phase (amplitude and speed), but different desorption characteristics due to the combined effect of the lumen size, fibre division and biochemical composition on the desorption mechanism. During hygromechanical fatigue tests the jute/MAPP HBCs exhibit a drastic improvement in durability compared to their flax counterparts. We also provide a demonstration on how HBCs can be used to trigger deployment of more complex structures based on Origami and Kirigami designs.
Starting Page	125009
Ending Page	125009
Page Count	1
File Format	PDF HTM / HTML
DOI	10.1088/1361-665X/aa9410
Alternate Webpage(s)	https://research-information.bristol.ac.uk/files/133462827/2017_09_11_manuscript_final.pdf
Alternate Webpage(s)	https://research-information.bris.ac.uk/files/133462827/2017_09_11_manuscript_final.pdf
Alternate Webpage(s)	https://doi.org/10.1088/1361-665X%2Faa9410
Volume Number	26
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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