Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/65505
Título: | Development of poly(l-Lactic Acid)-based bending actuators |
Autor(es): | Correia, Daniela Maria Silva Fernandes, Liliana C. Cruz, Bárbara D.D. Botelho, Gabriela de Zea Bermudez, Verónica Lanceros-Méndez, S. |
Palavras-chave: | PLLA ionic liquid composites degree of crystallinity thermal treatments |
Data: | 22-Mai-2020 |
Editora: | Multidisciplinary Digital Publishing Institute |
Revista: | Polymers |
Citação: | M. Correia, D.; C. Fernandes, L.; Cruz, B.D.; Botelho, G.; de Zea Bermudez, V.; Lanceros-Méndez, S. Development of Poly(l-Lactic Acid)-Based Bending Actuators. Polymers 2020, 12, 1187. |
Resumo(s): | This work reports on the development of bending actuators based on poly(<span style="font-variant: small-caps;">l</span>-lactic acid) (PLLA)/ionic liquid (IL) blends, through the incorporation of 40% wt. of the 1-ethyl-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Emim][TFSI]) IL. The films, obtained by solvent casting at room temperature and 50 °C, were subjected to several post-thermal treatments at 70, 90, 120 and 140 °C, in order to modify the crystallinity of the films. The influence of the drying temperature and of [Emim][TFSI] blending on the morphological, structural, mechanical and electrical properties of the composite materials were studied. The IL induced the formation of a porous surface independently of the processing conditions. Moreover, the [Emim][TFSI] dopant and the post-thermal treatments at 70 °C promoted an increase of the degree of crystallinity of the samples. No significant changes were observed in the degree of crystallinity and Young Modulus for samples with thermal treatment between 70 and 140 °C. The viability of the developed high ionic conductive blends for applications as soft actuators was evaluated. A maximum displacement of 1.7 mm was achieved with the PLLA/[Emim][TFSI] composite prepared at 50 °C and thermally treated at 140 °C, for an applied voltage of 10 Vpp, at a frequency of 100 mHz. This work highlights interesting avenues for the use of PLLA in the field of actuators. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/65505 |
DOI: | 10.3390/polym12051187 |
e-ISSN: | 2073-4360 |
Versão da editora: | https://www.mdpi.com/2073-4360/12/5/1187 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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polymers-12-01187-v2.pdf | 4,97 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons