In this presentation, we will cover some of the latest work in advanced and custom additive manufacturing processes for the fabrication of architected and functional materials. The concept of architected materials revolves around the notion that material properties are traditionally governed by the chemical composition and spatial arrangement of constituent elements at multiple length-scales. This usually limits material properties with respect to each other creating trade-offs when selecting materials for specific applications.  For example, strength and density are inherently linked so that, in general, the more dense the material, the stronger it is in bulk form. We will review the latest in design methods such as topology optimization, as well as advanced additive micro- and nanomanufacturing techniques to create new material systems with previously unachievable property combinations. These processes include projection microstereolithography (PuSL), direct ink writing (DIW), and electrophoretic deposition (EPD) as well as new advanced concepts such as volumetric additive manufacturing (VAM), computed axial lithography (CAL), parallel two-photon polymerization, liquid metal jetting, and diode-based additive manufacturing of metals (DiAM). The performance of the resulting material constructs is fundamentally controlled by geometry at multiple length-scales, from the nano- to the macroscale, rather than chemical composition alone. We have fabricated materials systems with these features and will review the resulting properties of these mechanical metamaterials in polymers, metals, ceramics, and combinations thereof. These new processes and concepts can also be applied to functional materials such as those for supercapacitor electrodes, optical components, and even for fluidic system such as the recently published cellular fluidics concept.

Additive manufacturing of architected and functional materials

ACS Spring 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.