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Bidirectional and Stretchable Piezoresistive Sensors Enabled by Multimaterial 3D Printing of Carbon Nanotube/Thermoplastic Polyurethane Nanocomposites.
Polymers (Basel). 2018 Dec 21; 11(1)P

Abstract

Fabricating complex sensor platforms is still a challenge because conventional sensors are discrete, directional, and often not integrated within the system at the material level. Here, we report a facile method to fabricate bidirectional strain sensors through the integration of multiwalled carbon nanotubes (MWCNT) and multimaterial additive manufacturing. Thermoplastic polyurethane (TPU)/MWCNT filaments were first made using a two-step extrusion process. TPU as the platform and TPU/MWCNT as the conducting traces were then 3D printed in tandem using multimaterial fused filament fabrication to generate uniaxial and biaxial sensors with several conductive pattern designs. The sensors were subjected to a series of cyclic strain loads. The results revealed excellent piezoresistive responses with cyclic repeatability in both the axial and transverse directions and in response to strains as high as 50%. It was shown that the directional sensitivity could be tailored by the type of pattern design. A wearable glove, with built-in sensors, capable of measuring finger flexure was also successfully demonstrated where the sensors are an integral part of the system. These sensors have potential applications in wearable electronics, soft robotics, and prosthetics, where complex design, multi-directionality, embedding, and customizability are demanded.

Authors+Show Affiliations

Advanced Composites Laboratory, School of Mechanical and Materials Engineering, Washington State University, 2710 Crimson Way, Richland, WA 99354, USA. josef.christ@wsu.edu.Advanced Composites Laboratory, School of Mechanical and Materials Engineering, Washington State University, 2710 Crimson Way, Richland, WA 99354, USA. nahal.aliheidari@wsu.edu.Department of Functional Nanocomposites and Blends, Leibniz Institute of Polymer Research Dresden, Hohe Straβe 6, Dresden D-01069, Germany. poe@ipfdd.de.Advanced Composites Laboratory, School of Mechanical and Materials Engineering, Washington State University, 2710 Crimson Way, Richland, WA 99354, USA. a.ameli@wsu.edu.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30959995

Citation

Christ, Josef F., et al. "Bidirectional and Stretchable Piezoresistive Sensors Enabled By Multimaterial 3D Printing of Carbon Nanotube/Thermoplastic Polyurethane Nanocomposites." Polymers, vol. 11, no. 1, 2018.
Christ JF, Aliheidari N, Pötschke P, et al. Bidirectional and Stretchable Piezoresistive Sensors Enabled by Multimaterial 3D Printing of Carbon Nanotube/Thermoplastic Polyurethane Nanocomposites. Polymers. 2018;11(1).
Christ, J. F., Aliheidari, N., Pötschke, P., & Ameli, A. (2018). Bidirectional and Stretchable Piezoresistive Sensors Enabled by Multimaterial 3D Printing of Carbon Nanotube/Thermoplastic Polyurethane Nanocomposites. Polymers, 11(1). https://doi.org/10.3390/polym11010011
Christ JF, et al. Bidirectional and Stretchable Piezoresistive Sensors Enabled By Multimaterial 3D Printing of Carbon Nanotube/Thermoplastic Polyurethane Nanocomposites. Polymers. 2018 Dec 21;11(1) PubMed PMID: 30959995.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bidirectional and Stretchable Piezoresistive Sensors Enabled by Multimaterial 3D Printing of Carbon Nanotube/Thermoplastic Polyurethane Nanocomposites. AU - Christ,Josef F, AU - Aliheidari,Nahal, AU - Pötschke,Petra, AU - Ameli,Amir, Y1 - 2018/12/21/ PY - 2018/11/27/received PY - 2018/12/19/revised PY - 2018/12/19/accepted PY - 2019/4/10/entrez PY - 2019/4/10/pubmed PY - 2019/4/10/medline KW - 3D printing KW - additive manufacturing KW - carbon nanotubes KW - functional nanocomposites KW - fused filament fabrication KW - piezoresistivity KW - strain sensing JF - Polymers VL - 11 IS - 1 N2 - Fabricating complex sensor platforms is still a challenge because conventional sensors are discrete, directional, and often not integrated within the system at the material level. Here, we report a facile method to fabricate bidirectional strain sensors through the integration of multiwalled carbon nanotubes (MWCNT) and multimaterial additive manufacturing. Thermoplastic polyurethane (TPU)/MWCNT filaments were first made using a two-step extrusion process. TPU as the platform and TPU/MWCNT as the conducting traces were then 3D printed in tandem using multimaterial fused filament fabrication to generate uniaxial and biaxial sensors with several conductive pattern designs. The sensors were subjected to a series of cyclic strain loads. The results revealed excellent piezoresistive responses with cyclic repeatability in both the axial and transverse directions and in response to strains as high as 50%. It was shown that the directional sensitivity could be tailored by the type of pattern design. A wearable glove, with built-in sensors, capable of measuring finger flexure was also successfully demonstrated where the sensors are an integral part of the system. These sensors have potential applications in wearable electronics, soft robotics, and prosthetics, where complex design, multi-directionality, embedding, and customizability are demanded. SN - 2073-4360 UR - https://www.unboundmedicine.com/medline/citation/30959995/Bidirectional_and_Stretchable_Piezoresistive_Sensors_Enabled_by_Multimaterial_3D_Printing_of_Carbon_Nanotube/Thermoplastic_Polyurethane_Nanocomposites_ L2 - https://www.mdpi.com/resolver?pii=polym11010011 DB - PRIME DP - Unbound Medicine ER -
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