Description:

Webinar

Rheological Considerations for Materials and Process Design in Dense Suspension 3D Printing

Prof. Michael J. Bortner

Department of Chemical Engineering

Virginia Tech

Tuesday, March 26,  Webinar at 6:00 PM Pacific time

Abstract

Additive manufacturing (AM) is revolutionizing manufacturing by enabling complex geometries and multimaterial structures that cannot be fabricated using traditional approaches. Extrusion additive manufacturing is one of the most identifiable modes of AM that implements predominantly polymeric materials. However, the technology is limited in terms of material availability and corresponding process design. Researchers have been pushed by consumers and industry to stretch the capabilities of AM across many different modalities.

Polymer extrusion AM, which encompasses modalities commonly referred to as pellet fed AM (BAAM), fused filament fabrication (FFF) and direct ink write (DIW), has differing and unique rheological requirements that can guide both materials and process design for enabling “printable” polymers and polymer composites. In this talk, I will focus on probing fundamental rheological considerations to enable polymer extrusion AM of dense polymer matrix suspensions across multiple extrusion platforms. I will highlight both experimental and modeling efforts in our research group to address commonly encountered considerations in extrusion AM processes, including interlayer diffusion, property anisotropy, and extrusion failure modes. I will present our recent work in dual-cure matrix technologies to enable DIW based processing with very high loading levels of rigid fillers. Further, methods for enabling FFF of functional materials for environmental remediation will be discussed. Finally, I want to pose the question on how to consider “successful” printing, with application focused examples that make us question how to define considerations for material formulations, process design, and rheology “requirements”.

Speaker Background

Registration deadline: Monday, March 25, 1:00 PM.

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Webinar Timing: 6:00 PM.

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