Autor segons l'article: Russo C; Ramírez JL; Fernández-Francos X; De la Flor S
Departament: Enginyeria Mecànica
Autor/s de la URV: De la Flor Lopez, Silvia / Ramírez Falo, José Luis / Russo, Claudio
Paraules clau: Thermal-conductivity Shape-memory polymers Electro-responsive actuators Dual-curing Conductive heater systems shape-memory polymers nanofiber electro-responsive actuators efficiency dual-curing carbon nanotube boron-nitride actuation
Resum: In this work, electro-responsive shape-memory actuators were developed by incorporating a conductive heater in a dual-curing thiol-acrylate-epoxy shape-memory polymer (SMP). A conductive heater, consisting of an electrically conductive silver-ink track printed on Kapton® substrate, was assembled to the SMP, taking advantage of the dual-curing processing. The shape-memory effect (SME) was activated by the heat dissipated by the Joule effect in the conductive track. Boron nitride agglomerates were dispersed in the thiol-acrylate-epoxy layers to increase thermal conductivity and achieve faster shape-recovery. A thermoelectric control unit was developed to control the shape recovery of the electro-responsive actuators and provide different activation strategies. The electrically activated SME was investigated and compared to a traditional SME based on an external heating source given by the dynamic mechanical analyzer (DMA) apparatus. Electro-responsive actuators were found extremely faster than the conventional SMPs based on external heating. The fastest recovery was obtained by the 15% boron nitride actuator, which recovered the 100% of the original shape in only 8 s. The thermoelectric controlling device provided an optimal control of the shape recovery speed based on the pulse width modulation of the heating current under the application of a low voltage (5 V).
Àrees temàtiques: Química Polymers and plastics Polymer science Materiais Interdisciplinar Engenharias ii Ciência de alimentos Biotecnología Astronomia / física
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: silvia.delaflor@urv.cat joseluis.ramirez@urv.cat
Identificador de l'autor: 0000-0002-6851-1371 0000-0001-8231-4019
Data d'alta del registre: 2024-01-13
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://onlinelibrary.wiley.com/doi/10.1002/pat.5634?af=R
URL Document de llicència: http://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Polymers For Advanced Technologies. 33 (5): 1715-1726
Referència de l'ítem segons les normes APA: Russo C; Ramírez JL; Fernández-Francos X; De la Flor S (2022). Electro-responsive shape-memory composites obtained via dual-curing processing. Polymers For Advanced Technologies, 33(5), 1715-1726. DOI: 10.1002/pat.5634
DOI de l'article: 10.1002/pat.5634
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2022
Tipus de publicació: Journal Publications
Repositori URV