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)
|
Presentation Title |
Freeform Fabrication of Two-Part Silicones via Reactive Extrusion Additive Manufacturing |
Author(s) |
Hongtao Song, Brandon Yu, Martha Leach, Carolyn Seepersad |
On-Site Speaker (Planned) |
Hongtao Song |
Abstract Scope |
Extrusion-based additive manufacturing (AM) of silicones faces tremendous challenges in terms of geometric accuracy, since the extrudate's shape integrity relies on the liquid precursor's rheological properties. However, this challenge can be addressed by reactive extrusion additive manufacturing (REAM) with greatly accelerated curing speed. REAM is a highly precise and repeatable AM process in which liquid resin precursors are mixed, deposited, and cured in-situ, resulting in parts exhibiting near-isotropic mechanical properties. By controlling the curing temperature, the gelation time of a wide range of commercially available two-part silicones can be controlled to the order of minutes without additional modifications in curing chemistry, making them compatible with REAM. In this work, two types of two-part silicones are characterized and printed via REAM, and the effects of relevant process parameters are investigated. The result expands the materials available to REAM and offers a new path to fabricate elastomeric components via extrusion-based AM processes. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |