Effects of Electrospinning Parameters on the Microstructure of PVP/TiO2 Nanofibers

Abstract

Titanium dioxide has excellent chemical, electrical, and optical properties, as well as good chemical stability. For that reason, it is widely used in many fields of study and industry, such as photocatalysts, organic solar cells, sensors, dental implants, and other applications. Many nanostructures of TiO2 have been reported, and electrospinning is an efficient practical technique that has a low cost and high efficiency. In various studies on improving performance, the researchers created nanofibers with suitable microstructures by changing various properties and the many process parameters that can be controlled. In this study, PVP/TiO2 nanofibers were fabricated by the electrospinning process. The diameters of the nanofibers were controlled by various parameters. To understand the effects on the diameter of the nanofibers, various process parameters were controlled: the molecular weight and concentration of the polymers, deionized water, applied voltage, fluid velocity, and concentration of titanium precursor. The average diameter of the PVP nanofibers was controlled in a range of 42.3 nm to 633.0 nm. The average diameter of the PVP/TiO2 nanofibers was also controlled in a range of 63.5 nm to 186.0 nm after heat treatment.

Influence of Electrospinning Setup Parameters on Properties of Polymer-Perovskite Nanofibers

“…determine their application area [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. The properties of nanofibers can be optimized by manipulating their thickness, diameter, and orientation of nanofibers (their structure) [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. Beads and drops lead to inhomogeneous properties of nanofibers and could result in a strong drop in their properties [ 17 , 18 , 19 ].…”

Dyeable PAN/CuS Nanofiber Membranes with Excellent Mechanical and Photothermal Conversion Properties via Electrospinning

“…The average diameters of composite fiber membranes with different CuS@QCS contents (0, 0.5, 1, 2, 5, and 10 wt %) are 275.1 ± 67.7, 248.8 ± 49.2, 248.3 ± 45.7, 229.7 ± 35.4, 190.6 ± 38.5, and 265.1 ± 53.4 nm, respectively, showing a trend of initially increasing and then decreasing. The decrease in the fiber diameter is mainly caused by strong electrostatic repulsion due to the charge accumulated in the spinning jet. , However, when the additive amount is more than 5 wt %, the average diameter of fiber increases (Figure S7f), which is attributed to CuS particle agglomeration.…”

“…The decrease in the fiber diameter is mainly caused by strong electrostatic repulsion due to the charge accumulated in the spinning jet. 35,36 However, when the additive amount is more than 5 wt %, the average diameter of fiber increases (Figure S7f), which is attributed to CuS particle agglomeration.…”

Development and Characterization of pH-Dependent Cellulose Acetate Phthalate Nanofibers by Electrospinning Technique

“…When the voltages were 15 and 20 kV, the NF diameter changed but was not significant; however, the diameter increased significantly as the voltage decreased to 10 kV. They concluded that the effect of voltage on the formation of fibers is small when they are above a critical value, but when it is not reached, the instability resulting from the electric field usually has a significant effect [59].…”

“…Recently, Kim et al (2021) reported the influence of the variation of the voltage and flow velocity on the diameter of NF. They prepared PVP-NF under specific conditions, testing voltages from 10 to 20 kV and flow rates from 0.2 to 1.0 mL/h and showed that the average diameter of NF tended to decrease when the fluid velocity decreased.…”