Fabrication of a silver-ragwort-leaf-like super-hydrophobic micro/nanoporous fibrous mat surface by electrospinning

Yasuhiro Miyauchi, Bin Ding, Seimei Shiratori

Research output: Contribution to journalArticle

142 Citations (Scopus)

Abstract

Inspired by the self-cleaning silver ragwort leaf, we have recently fabricated a biomimetic super-hydrophobic fibrous mat surface comprising micro/nanoporous polystyrene (PS) microfibres via electrospinning. The rough surface of the silver ragwort leaf fibres, with nanometre-sized grooves along the fibre axis, was imitated by forming micro-and nanostructured pores on the electrospun fibre surface. The solvent composition ratios of tetrahydrofuran (THF) to N,N-dimethylformamide (DMF) in PS solutions were proved to be the key parameter to affect the fibre surface structures due to the various phase separation speeds of the solvents from PS fibres during electrospinning. The combination of the hierarchical surface roughness inherent in electrospun microfibrous PS mats and the low surface free energy of PS yielded a stable super-hydrophobicity with water contact angles as high as 159.5° for a 12mg water droplet, exceeding that (147°) of the silver ragwort leaf. Moreover, the hydrophobicity of the porous PS mat surface was found to increase on increasing the surface roughness of the microfibres.

Original languageEnglish
Article number019
Pages (from-to)5151-5156
Number of pages6
JournalNanotechnology
Volume17
Issue number20
DOIs
Publication statusPublished - 2006 Oct 28

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Polystyrenes
Electrospinning
Silver
leaves
polystyrene
silver
Fabrication
fabrication
fibers
Fibers
microfibers
Hydrophobicity
hydrophobicity
surface roughness
Surface roughness
Dimethylformamide
Water
biomimetics
Biomimetics
tetrahydrofuran

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Fabrication of a silver-ragwort-leaf-like super-hydrophobic micro/nanoporous fibrous mat surface by electrospinning. / Miyauchi, Yasuhiro; Ding, Bin; Shiratori, Seimei.

In: Nanotechnology, Vol. 17, No. 20, 019, 28.10.2006, p. 5151-5156.

Research output: Contribution to journalArticle

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