NiO Nanofibers Research Articles

Novel mechanism to improve toughness of the hydroxyapatite bioceramics using high-frequency induction heat sintering

Abstract Novel technique was introduced to improve fracture toughness of hydroxyapatite (HAp) bioceramics. Composites of HAp/NiO with 1–5 wt% of electrospun NiO nanofibers were synthesized by wet-milling technique and the mixtures were consolidated rapidly to full density by high-frequency induction heat sintering (HFIHS). Effect of electrospun NiO nanofibers content on the toughness, hardness and microstructure properties was studied. The resulting composites showed good sintering behaviors, high toughness and hardness. Compared with the toughness of pure HAp, the heat sintered HAp/NiO nanofiber composites showed 200% increase in the toughness by the addition of 5 wt% NiO nanofibers. This can be related to the homogeneous dispersion of NiO nanoparticles in HAp at nanometer scales.

Observation of Toughness Improvement of the Hydroxyapatite Bioceramics Densified Using High‐Frequency Induction Heat Sintering

A novel nanocomposite has been introduced to improve the fracture toughness of hydroxyapatite (HAp) bioceramics. Composites of HAp/NiO with 1–5 wt% of electrospun NiO nanofibers were developed and studied. The mixtures were consolidated very rapidly to full density by high‐frequency induction heat sintering (HFIHS). The role of NiO nanofibers in enhancing the toughness, hardness, and microstructure properties of the HAp bioceramic was investigated. Field emission scanning electron microscopy was used to examine the morphology of the bioceramic composites and fracture surfaces to reveal the dominant toughening mechanisms. The results showed that the sintering behaviors, toughness, and hardness of the resulting composites were significantly enhanced by the inclusion of NiO nanofibers. The fracture toughness of the heat sintered HAp/NiO electrospun nanofiber composites was 1.8 times higher, as the concentration of NiO electrospun nanofibers reached 5 wt%.

Synthesis of Porous Nickel Oxide Nanofiber

Abstract Porous nickel oxide (NiO) nanofibers, structured with and composed of linearly oriented NiO nanoparticles, were synthesized via a simple method using a solution containing ethanol, H2O, NiCl2, and P123 (Pluronic P123, a triblock copolymer H(OCH2CH2)20(OCH(CH3)CH2)70(OCH2)20OH). By adjusting the concentration of P123, this method allows for the control of the fiber morphology and the nanoparticle size.