Effect of thermal annealing on the surface properties of electrospun polymer fibers

Jiun-Tai Chen*, Wan Ling Chen, Ping Wen Fan, I. Chun Yao

*Corresponding author for this work

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Electrospun polymer fibers are gaining importance because of their unique properties and applications in areas such as drug delivery, catalysis, or tissue engineering. Most studies to control the morphology and properties of electrospun polymer fibers focus on changing the electrospinning conditions. The effects of post-treatment processes on the morphology and properties of electrospun polymer fibers, however, are little studied. Here, the effect of thermal annealing on the surface properties of electrospun polymer fibers is investigated. Poly(methyl methacrylate) and polystyrene fibers are fist prepared by electrospinning, followed by thermal annealing processes. Upon thermal annealing, the surface roughness of the electrospun polymer fibers decreases. The driving force of the smoothing process is the minimization of the interfacial energy between polymer fibers and air. The water contact angles of the annealed polymer fibers also decrease with the annealing time. The effect of thermal annealing on the properties of electrospun polymer fibers is investigated. Poly(methyl methacrylate) and polystyrene fibers are fist prepared by electrospinning, followed by thermal annealing processes. After the electrospun fibers are thermally annealed, the roughness of the surfaces of the fibers decreases. The water contact angles of the annealed polymer fibers also decrease with the annealing time.

Original languageEnglish
Pages (from-to)360-366
Number of pages7
JournalMacromolecular Rapid Communications
Volume35
Issue number3
DOIs
StatePublished - 1 Feb 2014

Keywords

  • annealing
  • contact angle
  • electrospinning
  • nanofibers
  • polymers

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