Electrospinning is an electrostatic process for formation of polymer
fibers with nano/microscale diameter from solution. In this study, poly(vinyl pyrrolidone)
(PVP) dissolved at 4 wt% concentration in dichloromethane (DCM) containing
titanium oxide (
TiO2) nanoparticles was used as polymer feed solution for
electrospinning under pressurized carbon dioxide (
CO2) at temperature of 30 °C,
pressure of 5 MPa, and applied voltage of 10–14 kV. Scanning electron microscopy
(SEM) revealed that the PVP fibers electrospun with and without TiO2
nanoparticles
exhibited the same morphology with hollow structure and average pore diameter of
2–7 μm. Fourier-transform infrared (FT-IR) spectroscopy revealed that the electrospun
PVP fibers had properties similar to the PVP starting material. X-ray photoelectron
spectroscopy (XPS) revealed that the TiO2
nanoparticles were present in
the residue after thermogravimetric (TG) analysis of electrospun fibers.

EB00000003457K

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• Electrospinning of poly(vinyl pyrrolidone) fibers containing metal oxide nanoparticles under dense CO2