4 documents found, page 1 of 1
Environmentally friendlier printable conductive and piezoresistive sensing mate...
Franco, Miguel Alexandre Martins; Motealleh, Azadeh; Costa, Carlos Miguel Silva; Perinka, Nikola; Ribeiro, Clarisse Marta Oliveira; Tubio, Carmen R.Flexible and conformable conductive composites have been developed using different polymers, including water-based polyvinylpyrrolidone (PVP), chemical-resistant polyvinylidene fluoride (PVDF), and elastomeric styrene-ethylene-butylene-styrene (SEBS) reinforced with nitrogen-doped reduced graphene oxide with suitable viscosity in composites for printable solutions with functional properties. Manufactured by scr...
Environmentally friendly conductive screen‐printable inks based on N‐Doped grap...
Franco, Miguel; Motealleh, Azadeh; Costa, Carlos M.; Hilliou, L.; Perinka, Nikola; Ribeiro, Clarisse; Viana, Júlio César; Costa, PedroThe development of polymer-based conductive inks has gained increasing interest in the areas of printed and molded electronics. Graphene-based materials are explored in this scope, reduced graphene oxide (rGO) being among the most used conductive filler components of the inks. Herein, rGO is doped with nitrogen to obtain N-rGO; the replacement of oxygen atoms by nitrogen ones increases the electrical conductivi...
Robocasting of 45S5 bioactive glass scaffolds for bone tissue engineering
Eqtesadi, Siamak; Motealleh, Azadeh; Miranda, Pedro; Pajares, Antonia; Lemos, Alexandra; Ferreira, Jose M. F.Three dimensional scaffolds with controlled pore architecture were prepared from 45S5 Bioglass (R) powders by robocasting (direct-writing) using carboxymethyl cellulose (CMC) as the single processing additive. A comprehensive sintering study of the resulting structures was performed within the temperature range 500-1050 degrees C. Robocast scaffolds with interconnected porosities ranging from 60 to 80% were obt...
A simple recipe for direct writing complex 45S5 Bioglass (R) 3D scaffolds
Eqtesadi, Siamak; Motealleh, Azadeh; Miranda, Pedro; Lemos, Alexandra; Rebelo, Avito; Ferreira, Jose M. F.Direct-writing fabrication techniques, such as robocasting, have been ignored up to date for the production of scaffolds from 45S5 Bioglass (R), probably due to difficulties in the preparation of stable high solids loading colloidal suspensions (inks) from 45S5 Bioglass (R) powders using traditional approaches. Here, we report how these difficulties can be overcome. Aqueous suspensions containing 45 vol% of 45S...