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Highly stable coated polyvinylpyrrolidone nanofibers prepared using modified coaxial electrospinning

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Abstract

Hydrophobic polyvinylpyrrolidone (PVP) nanofibers, which is intensely hygroscopic, has been successfully prepared to improve their moisture resistance using a modified coaxial electrospinning process. A stearic acid (SA) solution was exploited as the sheath fluid to coat the fibers. Scanning electron microscopy demonstrated that the SA-coated PVP nanofibers became increasingly small with a rise in the sheath-to-core flow rate ratio; continuing to increase the sheath flow rate beyond a cut-off point resulted in nanofibres with very complicated morphologies. Transmission electron microscope images showed that SA formed a thin layer on the PVP nanofibers, with SA nanoparticles present on the fiber surfaces when a sheath-to-core flow rate ratio of 0.2:0.8 was used. Attenuated total reflectance-Fourier transform infrared spectroscopy verified the coating of SA onto the PVP nanofibers, and also the formation of hydrogen bonds between the SA and PVP molecules. The SA-coated PVP nanofibers were found to have much enhanced moisture resistance over pure PVP fibers. Modified coaxial electrospinning hence comprises a novel and powerful strategy for nanocoating and surface modification of polymer nanofibers.

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Authors and Affiliations

  1. Department of Chemistry, Zhengzhou Normal University, Zhengzhou, 450044, China

    Jiangang Xie & Hairong Mao

  2. School of Materials Science & Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China

    Deng-Guang Yu

  3. UCL School of Pharmacy, University College London, London, WC1N 1AX, UK

    Gareth R. Williams & Miao Jin

Authors
  1. Jiangang Xie
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  2. Hairong Mao
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  3. Deng-Guang Yu
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  4. Gareth R. Williams
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  5. Miao Jin
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Correspondence to Deng-Guang Yu.

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Xie, J., Mao, H., Yu, DG. et al. Highly stable coated polyvinylpyrrolidone nanofibers prepared using modified coaxial electrospinning. Fibers Polym 15, 78–83 (2014). https://doi.org/10.1007/s12221-014-0078-2

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  • DOI: https://doi.org/10.1007/s12221-014-0078-2

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