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Piezoresistive Properties of 3D-Printed Polylactic Acid (PLA) Nanocomposites
University of Borås, Faculty of Textiles, Engineering and Business. NSAIT, ULR 2461-GEMTEX-Génie et Matériaux Textiles, Université de Lille, F-59000 Lille, France; .College of Textile and Clothing Engineering, Soochow University, Suzhou 215006, China.. (Textile Materials Technology)ORCID iD: 0000-0002-9275-9991
ENSAIT, ULR 2461—GEMTEX—Génie et Matériaux Textiles, Université de Lille, F-59000 Lille, France.ORCID iD: 0000-0001-5031-3396
College of Textile and Clothing Engineering, Soochow University, Suzhou 215006, China.
College of Textile and Clothing Engineering, Soochow University, Suzhou 215006, China.
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2022 (English)In: Polymers, E-ISSN 2073-4360, Vol. 14, no 15, article id 2981Article in journal (Refereed) Published
Abstract [en]

An increasing interest is focused on the application of 3D printing for sensor manufacturing. Using 3D printing technology offers a new approach to the fabrication of sensors that are both geometrically and functionally complex. This work presents the analysis of the 3D-printed thermoplastic nanocomposites compress under the applied force. The response for the corresponding resistance changes versus applied load is obtained to evaluate the effectiveness of the printed layer as a pressure/force sensor. Multi-walled carbon nanotubes (MWNT) and high-structured carbon black (Ketjenblack) (KB) in the polylactic acid (PLA) matrix were extruded to develop 3D-printable filaments. The electrical and piezoresistive behaviors of the created 3D-printed layers were investigated. The percolation threshold of MWNT and KB 3D-printed layers are 1 wt.% and 4 wt.%, respectively. The PLA/1 wt.% MWNT 3D-printed layers with 1 mm thickness exhibit a negative pressure coefficient (NPC) characterized by a decrease of about one decade in resistance with increasing compressive loadings up to 18 N with a maximum strain up to about 16%. In the cyclic mode with a 1 N/min force rate, the PLA/1 wt.% MWNT 3D-printed layers showed good performance with the piezoresistive coefficient or gauge factor (G) of 7.6 obtained with the amplitude of the piezoresistive response (Ar) of about -0.8. KB composites could not show stable piezoresistive responses in a cyclic mode. However, under high force rate compression, the PLA/4 wt.% KB 3D-printed layers led to responses of large sensitivity (Ar = −0.90) and were exempt from noise with a high value of G = 47.6 in the first cycle, which is a highly efficient piezoresistive behavior.

Place, publisher, year, edition, pages
MDPI, 2022. Vol. 14, no 15, article id 2981
Keywords [en]
piezoresistive properties, 3D printing, fused deposition modelling (FDM), polylactic acid (PLA), multi-walled carbon nanotubes (MWNT), high-structured carbon black (KB)
National Category
Textile, Rubber and Polymeric Materials Polymer Technologies
Identifiers
URN: urn:nbn:se:hb:diva-28412DOI: 10.3390/polym14152981ISI: 000840231400001PubMedID: 35893945Scopus ID: 2-s2.0-85137106152OAI: oai:DiVA.org:hb-28412DiVA, id: diva2:1690180
Note

(This article belongs to the Special Issue Polymers and Their Application in 3D Printing)

Available from: 2022-08-25 Created: 2022-08-25 Last updated: 2024-01-17Bibliographically approved

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Hashemi Sanatgar, RaziehNierstrasz, Vincent

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