Ricerc@Sapienza

The use of dispersions of poly(vinyl alcohol) PVA and detonation nanodiamond (DND) as novel inks for 3D printing
of variously shaped objects using a layer-by-layer additive manufacturingmethod is reported. In parallelwith
the nanocomposites preparation, we designed a 3D printing apparatus and settled protocols for the shaping of
hybrid materials, choosing PVA-DND inks as a model system to test the performances of the 3D apparatus.
Along with material design and preparation, we discuss the main factors influencing the quality of the final

The development of an electrochemical cell based on poly(vinyl alcohol) (PVA) hydrogel as polymer electrolyte for electrochemical impedance spectroscopy analysis (EIS) is discussed. PVA hydrogel is prepared with different cycles of freeze/thawing (F/T) employing distillated and mineral water as solutions. The PVA-disks obtained are compared for their conductivities in order to employ it in an appropriate cell for diagnostic purposes, reducing the invasiveness of the analysis on the sample.