10 documents found, page 1 of 1
Solid electrolytes based on i-carrageenan and different ionic liquids for susta...
Polícia, R.; Serra, J. P.; del Campo, Francisco Javier; Vilas-Vilela, J. L.; Correia, Daniela M.; Costa, Carlos Miguel Silva; Lanceros-Méndez, S.The increase in electronic waste (e-waste) is a significant global concern due to fast technological development in which products rapidly become obsolete. To mitigate this problem in the field of electrochromic devices, four different types of solid polymer electrolytes (SPEs) were developed based on iota-carrageenan, a water-soluble biopolymer, and 40 wt% concentration of different ionic liquids (ILs): 1-buty...
The new silk road: Silk fibroin blends and composites for next generation funct...
Reizabal, A.; Costa, Carlos Miguel Silva; Pérez-Álvarez, L.; Vilas-Vilela, J. L.; Lanceros-Mendez, S.Silk Fibroin (SF), a protein typically extracted from Bombyx mori cocoons, is considered to play an essential role in advancing the development of a more sustainable generation of multifunctional materials. The unique properties of SF have led to its widespread application in various fields, including energy harvesting, electronics, and biomedicine. However, to further expand SF's potential and tailor it for sp...
Reusable nanocomposite membranes for highly efficient arsenite and arsenate dua...
Salazar, H.; Martins, Pedro Manuel Abreu; Valverde, A.; Fernández de Luis, R.,; Vilas-Vilela, J. L.; Ferdov, S.; Botelho, Gabriela; Lanceros-Méndez, S.Nanocomposite membranes (NCMs) of poly(vinylidene fluoride-hexafluoropropylene), PVDF-HFP, with different yttrium carbonate and magnetite loadings, are prepared, and their dual adsorption capacity over neutral arsenite and anionic arsenate species is evaluated. The nanoparticles (NPs) and the corresponding NCMs are fully characterized in morphology, microstructure, thermal, and surface properties. The nanocompo...
High dielectric constant poly(vinylidene fluoride-trifluoroethylene-chlorofluor...
Pereira, N.; Gonçalves, S.; Barbosa, J. C.; Gonçalves, Renato Ferreira; Tubio, C. R.; Vilas-Vilela, J. L.; Costa, Carlos Miguel SilvaPoly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene), P(VDF-TrFE-CFE), samples were prepared by solvent casting by varying polymer concentration and solvent evaporation temperature. Different sample morphologies were obtained depending on the processing conditions, as well as different physical-chemical properties such as degree of crystallinity, mechanical and dielectric properties. On the other ha...
Lithium bis(trifluoromethanesulfonyl)imide blended in polyurethane acrylate pho...
Mendes-Felipe, Cristian; Barbosa, J. C.; Gonçalves, Renato Ferreira; Miranda, D.; Costa, Carlos Miguel Silva; Vilas-Vilela, J. L.; Lanceros-Méndez, S.The increased demand of electronic devices promotes the development of advanced and more efficient energy storage devices, such as batteries. Lithium-ion batteries (LIBs) are the most studied battery systems due to their high performance. Among the different battery components, the separator allows the control of lithium ion diffusion between the electrodes. To overcome some drawbacks of liquid electrolytes, in...
Thermal degradation behavior of ionic liquid/ fluorinated polymer composites: E...
Dias, J. C.; Correia, Daniela Maria Silva; Costa, C. M.; Botelho, G.; Vilas-Vilela, J. L.; Lanceros-Méndez, S.This work reports on the evaluation of the thermal degradation of poly(vinylidene fluoride) (PVDF) and PVDF co-polymer (PVDF-TrFE, PVDF-HFP and PVDF-CTFE) composite films with different imidazolium ionic liquids (ILs). The influence of the IL type, including cation and anion type, cation chain length and content up to 40 wt% were evaluated. Independently of the fluorinated polymer type, all neat samples present...
Photocurable temperature activated humidity hybrid sensing materials for multif...
Mendes-Felipe, C.; Salado, M.; Fernandes, L. C.; Correia, Daniela Maria Silva; Ruiz-Rubio, L.; Tariq, M.; Esperança, J. M. S. S.; Vilas-Vilela, J. L.Photocurable thermochromic and humidity responsive materials based on polyurethane acrylated (PUA) and bis(1-butyl-3-methylimidazolium) tetrachloronickelate ([Bmim]2[NiCl4]) ionic liquid (IL) have been prepared with varying IL content up to 40 wt% within the polymer matrix. The influence of IL content on the photopolymerization process, morphology, Young modulus and electrical conductivity of the materials was ...
Processing strategies to obtain highly porous silk fibroin structures with tail...
Reizabal, A.; Costa, Carlos Miguel Silva; Saiz, P. G.; Gonzalez, B.; Pérez-Álvarez, L.; Fernández de Luis, R.; Garcia, A.; Vilas-Vilela, J. L.The present work reports on the control of silk fibroin (SF) porous structures performance through various processing methods. The study includes the analysis of two dissolving techniques (CaCl2/H2O/EtOH ternary and LiBr/H2O binary solutions), three regeneration methods (gelation, lyophilization and gas foaming) and one post-processing (EtOH). In all the cases, followed steps lead to SF structures with porosity...
High dielectric constant UV curable polyurethane acrylate/indium tin oxide comp...
Mendes-Felipe, C.; Barbosa, J. C.; Gonçalves, Sérgio; Rodrigues, Nelson Ricardo Pereira; Costa, Carlos Miguel Silva; Vilas-Vilela, J. L.Taking into consideration environmental issues and additive manufacturing technologies, the development of advanced UV curable polymers and polymer composites is an area of increasing interest. In this scope, polyurethane acrylate (PUA) composites with Indium Tin Oxide (ITO) were produced in order to tune morphology, optical, thermal, mechanical and dielectric properties. It is shown that ITO particles are well...
Optimized silk fibroin piezoresistive nanocomposites for pressure sensing appli...
Reizabal, A.; Gonçalves, Sérgio Abílio Pereira; Brito-Pereira, R.; Costa, P.; Costa, Carlos Miguel Silva; Pérez-Álvarez, L.; Vilas-Vilela, J. L.Environmental issues promote the development of sensors based on natural polymers which are becoming an area of increasing interest. Piezoresistive sensors based on silk fibroin with carbon nanotubes (CNTs) as fillers were produced by solvent-casting in order to tune their electrical conductivity and electromechanical responses. It is shown that the carbonaceous fillers are well dispersed in the polymer matrix ...