KES3-1498
Hierarchical Design of Sustainable and Long-Range Ordered 3D-Printed Materials
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Cyrille Boyer (UNSW Sydney)
Co-Author(s)
Abstract
Additive manufacturing enables complex three-dimensional (3D) geometries, yet achieving long-range ordered nanostructures within these architectures remains a fundamental challenge. This limitation stems from rapid crosslinking kinetics, which prematurely arrest block copolymers in disordered states. Here, we introduce Polymerization-Induced Arrangement of Nanostructures with Order-tunability (PIANO), a strategy that overcomes this kinetic mismatch by decoupling nanoscale ordering from network formation. By employing a mobility mediator (e.g., ethylene glycol) to enhance chain diffusion, PIANO facilitates rapid in situ self-assembly into tunable lamellar and hexagonally packed cylindrical morphologies, while simultaneously maintaining a robust hydrogen-bonding network compatible with 3D printing stresses. Crucially, the mediator acts as a latent crosslinker during post-printing annealing, "locking" the ordered nanostructures while reinforcing macroscopic mechanical strength. Finally, to ensure material circularity, we integrate dynamic bonds that enable controlled chemical decomposition without compromising initial structural integrity or printing resolution. By reconciling the divergent timescales of molecular self-assembly, fabrication, and degradation, the PIANO platform establishes a robust framework for the hierarchical design of sustainable, highly ordered functional materials.
