Morphology transformations of electrospun polymer fibers annealed on polymer films with thickness-controlled growth rates of undulation

Tyng Yow Kuo, Hsiao Fan Tseng, Yu Jing Chiu, Jiun-Tai Chen*

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Electrospun polymer fibers have attracted great attention in recent years because of their unique properties and applications in various areas such as tissue engineering and drug delivery. It remains a great challenge, however, to understand the morphology and property changes of electrospun polymer fibers induced by post-treatment, especially thermal annealing. In this work, we investigate the morphology evolution of electrospun polystyrene (PS) fibers thermally annealed on poly(vinyl alcohol) (PVA) films. Driven by the surface and interfacial tensions, the PS fibers transform to a series of regularly aligned anisotropic particles embedded in the PVA films via a Rayleigh instability-type transformation. From the in-situ observed optical microscopy (OM) images, higher growth rates of undulated amplitude can be obtained for thinner PVA films, revealing the effect of the underlying glass substrates.

Original languageEnglish
Pages (from-to)181-186
Number of pages6
Journalpolymer
Volume134
DOIs
StatePublished - 3 Jan 2018

Keywords

  • Anisotropic particle
  • Electrospun fiber
  • Thermal annealing

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