Surface Reconstruction on Electro-Spun PVA/PVP Nanofibers by Water Evaporation

Tailoring the secondary surface morphology of electro-spun nanofibers has been highly desired, as such delicate structures equip nanofibers with distinct functions. Here, we report a simple strategy to directly reconstruct the surface of polyvinyl alcohol/polyvinylpyrrolidone (PVA/PVP) nanofibers by...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2022-02, Vol.12 (5), p.797
Main Authors: Wang, Feipeng, Zhang, Zheng, Yan, Yuyang, Shen, Zijia, Wang, Qiang, Gerhard, Reimund
Format: Article
Language:English
Subjects:
Communication
Compression
Ethanol
Evaporation
Fourier transforms
intermolecular force
Intermolecular forces
Morphology
Nanofibers
Photoelectrons
Polymers
Polyvinyl alcohol
Polyvinylpyrrolidone
Scanning electron microscopy
Spectroscopy
surface reconstruction
surface-roughened nanofiber
Vacuum drying
Water vapor
X ray photoelectron spectroscopy
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Summary:Tailoring the secondary surface morphology of electro-spun nanofibers has been highly desired, as such delicate structures equip nanofibers with distinct functions. Here, we report a simple strategy to directly reconstruct the surface of polyvinyl alcohol/polyvinylpyrrolidone (PVA/PVP) nanofibers by water evaporation. The roughness and diameter of the nanofibers depend on the temperature during vacuum drying. Surface changes of the nanofibers from smooth to rough were observed at 55 °C, with a significant drop in nanofiber diameter. We attribute the formation of the secondary surface morphology to the intermolecular forces in the water vapor, including capillary and the compression forces, on the basis of the results from the Fourier-transform infrared (FTIR) and X-ray photoelectron (XPS) spectroscopy. The strategy is universally effective for various electro-spun polymer nanofibers, thus opening up avenues toward more detailed and sophisticated structure design and implementation for nanofibers.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano12050797