Abstract
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.
Graphical Abstract
SEM images of PVP with 25-nm TiO2 nanoparticles, electrospun at 5 MPa and various applied voltages, exhibiting hollow fiber morphology
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Ozawa, H., Machmudah, S., Wahyudiono et al. Electrospinning of poly(vinyl pyrrolidone) fibers containing metal oxide nanoparticles under dense CO2 . Res Chem Intermed 44, 2215–2230 (2018). https://doi.org/10.1007/s11164-017-3224-9
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DOI: https://doi.org/10.1007/s11164-017-3224-9