Post-doctoral - Bio-based programmable materials from papersAucun fichierBy taking inspiration from the living world, engineers have a wide range of possibilities for designing structures capable of shape changing under the effect of external stimuli (variations in humidity, temperature, pH, light etc.). The anisotropic architecture that can be controlled and the hygro-sensitive nature of cellulosic fibrous media make papers the materials of choice for developing structures capable of substantial geometric transformations in contact with liquid water or moisture. These transformations result from the establishment of a local gradient of hygro/hydro-expansive properties in the thickness of the material. In this project, we propose to develop papers that can take a folded 3D shape when in contact with liquid water, based on papers that have been made hydrophobic by chromatogeny. The approach is to deactivate the hydrophobicity along lines up to a certain thickness by printing enzymes.
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