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Solvent-triggered shape change in gradient-based 4D printed bilayers: case study on semi-crystalline polymer networks
Lorenzo Bonetti1, Aron Cobianchi1, Daniele Natali2
1Department of Civil Engineering and Architecture, University of Pavia, Via Ferrata 3, Pavia 27100, Italy. lorenzo.bonetti@unipv.it.
Soft Matter
|May 8, 2024
Abstract:
We propose an approach to 4D print solvent-triggered, gradient-based bilayers made of semi-crystalline crosslinked polymer networks. Out-of-plane bending is obtained after immersion in the solvent, exploiting the different swelling degrees of the layers resulting from crosslinking gradients. Lastly, a beam model of the shape transformation is applied and experimentally validated.

