|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Recent Advances in Printed Electronics and Additive Manufacturing: 2D/3D Functional Materials, Fabrication Processes, and Emerging Applications
||Imbibition Control of Polymer Solutions via Molecular Weight and Surface Functionalization onto Nanoporous Metal Media
||Amm Hasib, Bruno Azeredo
|On-Site Speaker (Planned)
Imbibition of polymeric fluid in nanoporous media is a key strategy driven by surface tension (e.g. capillary effect) that enables densification of polymer-metal nanocomposites for 3D printing such as binder jetting and fused filament deposition. This presentation first examines the wetting characteristics of a thermoplastic dissolved in a solvent onto a nanoporous copper powder bed as a function of its molecular weight and concentration, and the surface functionalization of the host metal. It is found that molecular weight and the solvent’s transient concentration regulates its viscosity which inhibits imbibition and densification, and that acidic or alkaline surface treatments regulate its contact angle and, consequently, its imbibition. Finally, composites formed are casted and dried to evaluated for their density, dynamic viscosity and microstructure, and its results are correlated with its wettability characteristics, effectively validating a materials design approach for enabling printing of conductive nanoporous metal tracks for 3D printing of electronics.
||Additive Manufacturing, Composites, Nanotechnology