Tensile deformation of polytetrafluoroethylene hollow fiber membranes used for water purification

Akio YONEZU*, Shouichi IIO, Takehiro ITONAGA, Hiroshi YAMAMURA, Xi CHEN

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

8 Citations (Scopus)


The tensile deformation behavior of polytetrafluoroethylene (PTFE) hollow fiber membranes is studied. PTFE membranes at present have sub-micron pores with an open cell structure, which plays a critical role in water purification. One of the main challenges in water purification is that the pore structure becomes covered with biofouling, leading to blocked pores. To maintain the capacity for water purification, physical cleaning along with mechanical deformation is usually conducted. Thus, it is crucial to understand the mechanical properties, in particular the deformation behavior, of the membrane fibers. Using uniaxial tension experiments, we established a fundamental discrete model to describe the deformation behavior of a porous structure using a finite element method. The present model enables the prediction of the macroscopic deformation behavior of the membrane, by taking into account the changes of pore structure. The insight may be useful for porous membrane fabrication and provide insights for the reliable operation of water purification. © IWA Publishing 2014.
Original languageEnglish
Pages (from-to)1244-1250
Number of pages7
JournalWater Science and Technology
Issue number7
Early online date22 Aug 2014
Publication statusPublished - Oct 2014
Externally publishedYes


  • Finite element method
  • Hollow fiber membranes
  • Mechanical property
  • Porous polymer material
  • Tensile deformation


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