Abstract
Niobium pentoxide (Nb2O5) sub-micrometric fibers were produced by Solution Blow Spinning (SBS) from oxide nanoparticles as starting material dispersed in polymer solutions used as a spinning aid. It was observed that the thermo-physical properties of poly(vinyl pyrrolidone) (PVP) and poly(vinyl alcohol) (PVA) significantly influenced the consolidation of the fibrillar morphology after thermal treatment by calcination. However, the nanometric size of the oxide particles plays the leading role due to the kinetics of neck formation during sintering, according to the molecular dynamic simulations, being up to five orders of magnitude more efficient for nanoparticles of 6.5 nm in size. This work demonstrates the proof of concept of engineering metal-oxide fibers directly from nanopowder oxides used as precursors.
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