Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/82051
Título: | Carrageenan based printable magnetic nanocomposites for actuator applications |
Autor(es): | Macedo, V. M. Pereira, N. Tubio, C. R. Martins, P. Costa, C. M. Lanceros-Méndez, S. |
Palavras-chave: | A. Nano composites A. Polymer matrix composites (PMCs) A. Smart materials B. Magnetic properties E. 3D printing Nano composites Polymer matrix composites (PMCs) Smart materials Magnetic properties 3D printing |
Data: | 2022 |
Editora: | Elsevier 1 |
Revista: | Composites Science and Technology |
Citação: | Macedo, V. M., Pereira, N., Tubio, C. R., Martins, P., Costa, C. M., & Lanceros-Mendez, S. (2022, June). Carrageenan based printable magnetic nanocomposites for actuator applications. Composites Science and Technology. Elsevier BV. http://doi.org/10.1016/j.compscitech.2022.109485 |
Resumo(s): | The digitalization of the society in the context of the Internet of Things (IoT) demands a new generation of sustainable materials and processes to reduce the environmental impact of technological advances. This work reports on sustainable multifunctional nanocomposites based on carrageenan and magnetic cobalt ferrite (CoFe2O4-CFO) nanoparticles, processed by direct-ink-writing and on their applicability as magnetic actuators. The nanocomposites exhibit a compact morphology with CFO nanoparticles well distributed within the polymer matrix. The incorporation of CFO nanoparticles significantly improves the thermal and mechanical properties of the polymer: the onset degradation temperature increases 30ºC and the Young's modulus increases from 1 MPa in the pristine polymer to 17 MPa for the composite with 5 wt.% CFO content. CFO magnetic nanoparticles are also responsible for increasing the dielectric constant of carrageenan from ≈1000 up to ≈9000 (10wt.% CFO composite), and for the magnetic properties, with a maximum magnetization of ≈16 emu.g -1 and coercive field of ≈3.4 kOe in the 30 wt.% CFO composite. A magnetic actuator has been developed with excellent maximum displacement. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/82051 |
DOI: | 10.1016/j.compscitech.2022.109485 |
ISSN: | 0266-3538 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0266353822002275 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: |