Autor(es): Cruz, B. D. D. ; Pereira, N. ; García Díez, Ander ; Botelho, G. ; Lanceros-Méndez, S. ; Bermudez, V. de Zea ; Correia, Daniela M.
Data: 2024
Identificador Persistente: https://hdl.handle.net/1822/93929
Origem: RepositóriUM - Universidade do Minho
Assunto(s): Composites; Ionic liquids; PVDF; Photoluminescence; Sensors
Smart multifunctional materials have been increasingly applied in different fields of knowledge. In particular, photoluminescent materials have been explored for displays, radiation detection, lamps or anti-counterfeiting applications, among others. This work reports the development of photoluminescent materials based on poly (vinylidene fluoride) (PVDF) polymer incorporating different contents (0, 5, 10, and 20 % w/w) of the lumi nescent ionic liquid (IL) 1-butyl-3-methylimidazolium tetrakis(thenoyltrifluoroacetonato)europate(III) ([Bmim] [Eu(tta)4]). The inclusion of the IL induced an increase of roughness and a slightly porous structure. No changes occur in the PVDF chemical structure and thermal behaviour. A decrease in the Young Modulus was observed, from 1.75×103 ± 1.56×102 to 5.09×102 ± 2.07×102 MPa for the sample incorporating 20 % w/w of IL which acted as a plasticizer. Further, the presence of ionic charges promoted an increase in electrical conductivity. The influence of IL content on the luminance was evaluated and a proof of concept demonstrating the potential of the composites as a UV–vis filter converter is provided.
