The effect of extrusion temperature and cycles on electrical resistivity in carbon nanofiber-modified PLA filament for multi-functional additive manufacturing

Cole M. Maynard; J. A. Hernandez; D. Gonzalez; T. N. Tallman; J. Garcia; B. Newell

doi:10.1117/12.2557298

23 April 2020 The effect of extrusion temperature and cycles on electrical resistivity in carbon nanofiber-modified PLA filament for multi-functional additive manufacturing

Cole M. Maynard, J. A. Hernandez, D. Gonzalez, T. N. Tallman, J. Garcia, B. Newell

Author Affiliations +

Proceedings Volume 11379, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2020; 113791O (2020) https://doi.org/10.1117/12.2557298
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

Multi-functional additive manufacturing is a promising route to achieving exciting new rapid prototyping and in-the-field manufacturing capabilities. Ideally, multi-functionality could be imparted to materials that can be used with existing additive manufacturing hardware with little-to-no modification of the hardware. However, because much of the additive manufacturing hardware currently available is highly sensitive to the properties of the input material, it is important to understand the relationship among the processing/development of the input material, its physical properties, and quality and properties of the additively manufactured part. To that end, this project explores the effects of processing conditions on the electrical properties and printability of nanofiller-modified fused deposition modeling (FDM) filament. Specifically, pulverized polylactic acid (PLA) is dry mixed with carbon nanofibers (CNFs) and extruded through a commercially available single-screw filament extruder. Filament resistivity and diameter are then statistically characterized as a function of extrusion temperature and number of extrusions. Printability is also quantitatively and qualitatively characterized using a commercial FDM printer. Insights developed through this work could be of considerable significance to next-generation additively manufactured piezoresistive-based sensors, actuators, and electrical components.

Conference Presentation

Citation Download Citation

Cole M. Maynard, J. A. Hernandez, D. Gonzalez, T. N. Tallman, J. Garcia, and B. Newell "The effect of extrusion temperature and cycles on electrical resistivity in carbon nanofiber-modified PLA filament for multi-functional additive manufacturing", Proc. SPIE 11379, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2020, 113791O (23 April 2020); https://doi.org/10.1117/12.2557298

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