On the cogent formulation of an elastomeric silicone ink material for direct ink write ( DIW ) 3D printing
[1];
[2];
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- Department of Macromolecular Sciences and Engineering Case Western Reserve University Cleveland Ohio USA
- Department of Macromolecular Sciences and Engineering Case Western Reserve University Cleveland Ohio USA, Department of Chemical and Biomolecular Engineering, Department of Materials Science and Engineering and Institute for Advanced Materials and Manufacturing University of Tennessee Knoxville Tennessee USA, Center for Nanophase Materials and Sciences Oak Ridge National Laboratory Oak Ridge Tennessee USA
Abstract Adhesives and sealants show fine rheology with good physical and mechanical properties as viscous pastes, a possible starting point for developing direct ink writing (DIW) 3D printing ink. However, many commercial adhesives and sealants take days or weeks to cure fully. DIW 3D‐printed parts made directly from these sealants are not designed for a scalable manufacturing process and high‐volume production. Moreover, most of these adhesives and sealants have volume shrinkage during cure. A systematic understanding of formulation methods and design principles for an elastomeric silicone DIW ink can overcome these issues. This study presents the cogent formulation development of a 3D printable thermoset elastomer silicone that gels and cures isotropically in minutes, reducing cycle time for rapid ink development with no shrinkage during cure. More specifically, we outline the principles of raw material selection of a formulation to achieve excellent rheology, printability, synchronized working, and gel time fitting requirements closer to scalable manufacturing. The reaction kinetics and their corresponding 3D‐printed structural properties are also described. Interest in future work is toward a rational DIW 3D printing ink material development protocol and use of machine learning (ML). Highlights Formulation method flexibility and design principle of DIW ink. Raw material selection principle to achieve optimal rheology for DIW printing. Ink gel kinetics for large‐scale DIW manufacturing. Hydrosilylation conversion over time at different ambient temperatures. Structural properties of DIW 3D printed parts.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 2329350
- Alternate ID(s):
- OSTI ID: 2447274
- Journal Information:
- Polymer Engineering and Science, Journal Name: Polymer Engineering and Science Journal Issue: 6 Vol. 64; ISSN 0032-3888
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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