Arias-Ferreiro, GorettiLasagabaster Latorre, AuroraAres-Pernas, AnaDopico-García, M. SoniaPereira, N.Costa, P.Lanceros-Méndez, S.Abad Martínez, María José2025-02-262025-02-262022Arias‐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.2022005902199-160X10.1002/aelm.202200590https://hdl.handle.net/20.500.14352/118332The 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.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/journal articlehttps://doi.org/10.1002/aelm.202200590open access544Digital light processingFlexible electronicsMulti-walled carbon nanotubesPiezoresistive pressure sensorPolyanilineStereolithographyCienciasElectrónica (Física)Materiales22 Física2203.09 Piezoelectricidad2304.03 Polímeros Compuestos