Bioinspired multifunctional composites with morphing capabilities
Hortense Le Ferrand a
a NTU Singapore - Nanyang Technological University, School of Materials Science and Engineering, Nanyang Avenue, 50, Singapore, Singapore
Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe Fall Meeting 2021 (NFM21)
#NanoPrint21. Engineered Nanomaterials and Inks for Printed, Flexible and Interfacial Electronics
Online, Spain, 2021 October 18th - 22nd
Organizers: Shweta Agarwala and Victor Sans Sangorrin
Invited Speaker, Hortense Le Ferrand, presentation 001
DOI: https://doi.org/10.29363/nanoge.nfm.2021.001
Publication date: 23rd September 2021

Inspired by plants systems, such as the Venus flytrap that closes in a few milliseconds under mechanical trigger, and the seedpods that open up under hydration, we developed methods to create multifunctional morphing composites. To achieve morphing and functionality, we control the microstructure of composite materials using magnetic orientation or shear-induced 3D printing. Supported by finite element modelling and experimental tests, the materials created can morph into predicted shapes. Including electrical particles inside the composite, at concentrations close to their percolation, the changes in the electrical conductivity can inform about the change in shape and the triggers that caused it. Indeed, morphing create local compression or extension that modifies the interparticle distance in the electrically conductive network. Specifically, 2 examples will be discussed. In the first one, stiff epoxy laminates are made to snap reversibly under mechanical or magnetic trigger. In the other, stiff 3D printed epoxy composites are able to morph reversibly into several preprogrammed configurations, in response to temperature and mechanical force. Combining the electrical response with the morphing, this strategy can create new kinds of computational materials for applications as sensors or actuators in robotics or aerospace.Inspired by plants systems, such as the Venus flytrap that closes in a few milliseconds under mechanical trigger, and the seedpods that open up under hydration, we developed methods to create multifunctional morphing composites. To achieve morphing and functionality, we control the microstructure of composite materials using magnetic orientation or shear-induced 3D printing. Supported by finite element modelling and experimental tests, the materials created can morph into predicted shapes. Including electrical particles inside the composite, at concentrations close to their percolation, the changes in the electrical conductivity can inform about the change in shape and the triggers that caused it. Indeed, morphing create local compression or extension that modifies the interparticle distance in the electrically conductive network. Specifically, 2 examples will be discussed. In the first one, stiff epoxy laminates are made to snap reversibly under mechanical or magnetic trigger. In the other, stiff 3D printed epoxy composites are able to morph reversibly into several preprogrammed configurations, in response to temperature and mechanical force. Combining the electrical response with the morphing, this strategy can create new kinds of computational materials for applications as sensors or actuators in robotics or aerospace.

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