About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Multi-Material Additive Manufacturing of Polymeric Composites With Seamless Soft-Hard Interface Integration From Molecular Bonding |
Author(s) |
Daniel Andrew Rau, Baiqiang Huang, Emmanuel Oduro , Liheng Cai |
On-Site Speaker (Planned) |
Daniel Andrew Rau |
Abstract Scope |
Multi-material additive manufacturing (AM) enables functionally graded 3D structures integrating materials with dramatically different properties. However, developing robust multi-material AM processes for joining parts with distinct mechanical properties remains a grand challenge. We report multi-material vat photopolymerization (VP) printing of polymeric composites achieving seamless soft-hard interface integration via molecular bonding. Exploiting foldable bottlebrush polymer networks, we developed resins with Young’s moduli spanning over three orders of magnitude (~40 kPa to ~150 MPa). Importantly, the different materials sharing the same cure chemistry enables molecular-level bonding between polymers of dramatically different stiffness. Using a customized VP platform, we printed multi-material tensile bars exhibiting remarkable stretchability (breaking strain >700%) determined primarily by the softer component. We further demonstrate printing of multi-material composites with spatially resolved mechanical properties and seamless interface integration. This multi-material VP process and resin system open an avenue for manufacturing functional 3D polymeric structures and devices for diverse applications. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |