2026-06-29T02:34:20Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1183322025-02-27T00:55:35Zcom_20.500.14352_14col_20.500.14352_15

Flexible 3d printed acrylic composites based on polyaniline/multiwalled carbon nanotubes for piezoresistive pressure sensors Arias-Ferreiro, Goretti Lasagabaster Latorre, Aurora Ares-Pernas, Ana Dopico-García, M. Sonia Pereira, N. Costa, P. Lanceros-Méndez, S. Abad Martínez, María José The development of tunable UV-curable polymeric composites for functional applications, taking into consideration environmental issues and additive manufacturing technologies, is a research topic with relevant challenges yet to be solved. Herein, acrylic composites filled with 0–3 wt.%. polyaniline/ multiwalled carbon nanotubes (PANI/MWCNT) are prepared by Digital Light Processing (DLP) in order to tailor morphology, thermal, mechanical, and electromechanical properties. Viscosity, real-time infrared spectroscopy, and cure depth tests allow optimizing resin composition for suitable DLP printing. 2 wt.% is the maximum filler content reproducibly embedded in the polymer matrix. The advantages of PANI/MWCNT (50/50 wt.%) compared with single-component composites include safety issues, enhanced printability, increased electrical conductivity and thermal stability, and lower electrical percolation threshold (0.83 wt.%). Above this threshold the composites display excellent piezoresistive response, no hysteresis, and stability for over 400 compression cycles. The pressure sensibility (PS) of 2 wt.% composites decreases with applied pressure from PS ≈ 15 to 0.8 Mpa−1 for maximum pressures of 0.02 and 0.57 MPa, respectively. A proof-of-concept of the functionality of the novel materials is developed in the form of a tactile sensor, demonstrating their potential for pressure sensing applications as cost-effective, sustainable, and flexible materials for printed electronics. 2025-02-26T13:49:29Z 2025-02-26T13:49:29Z 2025-02-26T13:49:29Z 2022 journal article https://hdl.handle.net/20.500.14352/118332 2199-160X 10.1002/aelm.202200590 eng ED481A-2019/001 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116976RB-I00/ES/REVALORIZACION DE LIGNINA EN COMPUESTOS POLIMERICOS CONDUCTORES PARA IMPRESION 3D / ED431C 2019/17 UIDB/00319/2021, SFRH/BPD/110914/2015 Arias‐Ferreiro, Goretti, et al. «Flexible 3D Printed Acrylic Composites Based on Polyaniline/Multiwalled Carbon Nanotubes for Piezoresistive Pressure Sensors». Advanced Electronic Materials, vol. 8, n.o 12, diciembre de 2022, p. 2200590. DOI.org (Crossref), https://doi.org/10.1002/aelm.202200590 http://creativecommons.org/licenses/by/4.0/ open access Attribution 4.0 International Wiley