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Article

Compounding a High-Permittivity Thermoplastic Material and Its Applicability in Manufacturing of Microwave Photonic Crystals

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Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
2
Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA
3
Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Douglas E. Smith and Chad Duty
Materials 2022, 15(7), 2492; https://doi.org/10.3390/ma15072492
Received: 8 February 2022 / Revised: 18 March 2022 / Accepted: 24 March 2022 / Published: 28 March 2022
(This article belongs to the Special Issue Advances in Polymer Composite Deposition Additive Manufacturing)
Additive Manufacturing (AM) techniques allow the production of complex geometries unattainable through other traditional technologies. This advantage lends itself well to rapidly iterating and improving upon the design of microwave photonic crystals, which are structures with intricate, repeating features. The issue tackled by this work involves compounding a high-permittivity material that can be used to produce 3D microwave photonic structures using polymer extrusion-based AM techniques. This material was acrylonitrile butadiene styrene (ABS)-based and used barium titanate (BaTiO3) ceramic as the high-permittivity component of the composite and involved the use of a surfactant and a plasticizer to facilitate processing. Initial small amounts of the material were compounded using an internal batch mixer and studied using polymer thermal analysis techniques, such as thermogravimetric analysis, rheometry, and differential scanning calorimetry to determine the proper processing conditions. The production of the material was then scaled up using a twin-screw extruder system, producing homogeneous pellets. Finally, the thermoplastic composite was used with a screw-based, material extrusion additive manufacturing technique to produce a slab for measuring the relative permittivity of the material, as well as a preliminary 3D photonic crystal. The real part of the permittivity was measured to be 12.85 (loss tangent = 0.046) in the range of 10 to 12 GHz, representing the highest permittivity ever demonstrated for a thermoplastic AM composite at microwave frequencies. View Full-Text
Keywords: additive manufacturing; material extrusion; compounding; topological structures; twin-screw extrusion additive manufacturing; material extrusion; compounding; topological structures; twin-screw extrusion
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MDPI and ACS Style

Mazzei Capote, G.A.; Montoya-Ospina, M.C.; Liu, Z.; Mattei, M.S.; Liu, B.; Delgado, A.P.; Yu, Z.; Goldsmith, R.H.; Osswald, T.A. Compounding a High-Permittivity Thermoplastic Material and Its Applicability in Manufacturing of Microwave Photonic Crystals. Materials 2022, 15, 2492. https://doi.org/10.3390/ma15072492

AMA Style

Mazzei Capote GA, Montoya-Ospina MC, Liu Z, Mattei MS, Liu B, Delgado AP, Yu Z, Goldsmith RH, Osswald TA. Compounding a High-Permittivity Thermoplastic Material and Its Applicability in Manufacturing of Microwave Photonic Crystals. Materials. 2022; 15(7):2492. https://doi.org/10.3390/ma15072492

Chicago/Turabian Style

Mazzei Capote, Gerardo Andres, Maria Camila Montoya-Ospina, Zijie Liu, Michael Sabatini Mattei, Boyuan Liu, Aidan P. Delgado, Zongfu Yu, Randall H. Goldsmith, and Tim Andreas Osswald. 2022. "Compounding a High-Permittivity Thermoplastic Material and Its Applicability in Manufacturing of Microwave Photonic Crystals" Materials 15, no. 7: 2492. https://doi.org/10.3390/ma15072492

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