Fluorine-Enriched Melt-Blown Fibers from Polymer Blends of Poly(butylene terephthalate) and a Fluorinated Multiblock Copolyester

Zaifei Wang, Christopher W. Macosko, Frank S. Bates

Research output: Contribution to journalArticle

14 Scopus citations


Melt-blown fibers (dav ∼1 μm) were produced from blends of poly(butylene terephthalate) (PBT) and a partially fluorinated random multiblock copolyester (PFCE) leading to enhanced hydrophobicity and even superhydrophobicity (static water contact angle = 157 ± 3°) of the associated fiber mats. XPS measurements demonstrated quantitatively that the surface fluorine content increased systematically with the bulk loading of PFCE, rising to nearly 20 atom %, which corresponds to 41 wt % PFCE at a bulk loading of 10 wt %. The PBT/PFCE fibers exhibit greater fluorine surface segregation than either melt-blown PBT/poly(ethylene-co-chlorotrifluoroethylene) (PBT/PECTFE) fibers or electrospun fibers obtained from blends of poly(styrene) and fluoroalkyl end-capped polystyrene (PS/PSCF). Dynamic contact angle measurements further demonstrated decreased surface adhesion energy of the melt-blown PBT/PFCE fiber mats due to the blooming of PFCE to the surface.

Original languageEnglish (US)
Pages (from-to)754-761
Number of pages8
JournalACS Applied Materials and Interfaces
Issue number1
StatePublished - Jan 13 2016



  • fluorinated copolyester
  • melt-blown
  • PBT fibers
  • superhydrophobic
  • surface segregation

How much support was provided by MRSEC?

  • Shared

Reporting period for MRSEC

  • Period 2

PubMed: MeSH publication types

  • Journal Article
  • Research Support, Non-U.S. Gov't

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