Titanium Oxide Sol–Gel Induced Wrinkling of Electrospun Nanofibers

Yaewon Park, Ericka Ford

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


TiO2 sol–gel reaction induces nanowrinkling along the surface of electrospun poly(vinyl alcohol) (PVA) nanofibers. Nanowrinkling along nanofibers is influenced by electrospinning voltage, degree of nanofiber crosslinking, and the repetitive immersion of nanofibers in TiO2 precursors. Crosslinked nanofibers are dipped in alternating solutions of titanium tetraisopropoxide (TTIP) and water for up to five cycles. Interestingly, nanowrinkles only form along nanofibers that are spun at 45 kV and treated with three or more cycles of sol–gel precursor. Spectroscopy reveals that more PVA hydroxyl groups populate the nanofiber surface when electrospinning occurs at 45 kV than at 15 kV. In turn, surface PVA hydroxyl groups appear to nucleate TiO2 growth. Scanning probe phase micrographs confirm modulus differences between the attached TiO2 particles and PVA's surface. Those moduli differences result in wrinkling, as TTIP-treated nanofibers undergo repetitive cycles of water swelling and isopropanol deswelling.

Original languageEnglish
Article number1800028
JournalMacromolecular Chemistry and Physics
Issue number13
Publication statusPublished - 2018 Jul

Bibliographical note

Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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