RT journal article
T1 Photocurable Carbonaceous Composites with Tunable Piezoresistive Response
A1 Mendes-Felipe, Cristian
A1 Rubio Peña, Luis
A1 Costa, Pedro
A1 Petrenko, Viktor
A1 Passos Cavalcanti, Leide
A1 Zbiri, Mohamed
A1 Golub, Maksym
A1 Pieper, Jörg
A1 Sangermano, Marco
A1 Lanceros Méndez, Senentxu
A2 Ingeniería en AutomáticaElectrónica, Arquitectura y Redes de Computadores
K1 Photocurable composites
K1 Carbon nanotubes
K1 Reduced graphene oxide
K1 Neutron scattering
K1 Electrical conductivity
K1 Piezoresistive behavior
AB Photocurable polymer composites with tailored electrical and mechanical properties is of growing interest for advancedmanufacturing and (multi)functional applications. This study investigates how two carbonaceous fillers, carbon nanotubes(CNT) and reduced graphene oxide (rGO), affect the photopolymerization, nanoscale structure, and macroscopic propertiesof two photocurable resins with distinct mechanical nature: an elastic polyurethane acrylate (SPOT-E) and a rigid biobasedacrylated epoxidized soybean oil (AESO). Photorheology reveals that CNT strongly inhibit curing above 0.6 wt.%due to optical shielding, while rGO enables complete curing up to 5 wt.%. Dispersion analysis indicates homogeneousdistributions for both fillers, whereas mechanical analysis exhibits network deterioration at high filler contents. Quasielasticneutron scattering shows that fillers incorporation significantly restricted SPOT-E dynamics but enhanced AESOmobility, the effect depending on filler type and loading filler contents. These multiscale effects translate into electricalconductivities of 0.014 S/m (SPOT-E/CNT) and 7.5·10–5 S/m (AESO/rGO). Finally, piezoresistive assessment revealedmaximum gauge factors of ~ 0.9 for SPOT-E/CNT and ~ 50 for AESO/rGO systems and stability over 700 cycles. Theseresults provide essential insights into the interplay between filler morphology, photopolymerization, and multifunctionalperformance in UV-curable composites, enabling the rational design of materials with predefined properties for additivemanufacturing and electronics applications.
PB Springer
SN 2522-0136
YR 2026
FD 2026-04-18
LK http://hdl.handle.net/10498/40341
UL http://hdl.handle.net/10498/40341
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026