Spontaneous multiscale phase separation within fluorinated xerogel coatings for fouling-release surfaces

A Sokolova, JJ Bailey, GT Waltz, LH Brewer, John Finlay, J Fornalik, DE Wendt, Maureen Callow, James Callow, FV Bright, MR Detty

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Four-component xerogel films consisting of 1 mole-% n-octadecyltrimethoxysilane (C18) and 50 mole-% tetraethoxysilane (TEOS) in combination with 1-24 mole-% tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane (TDF) and 25-48 mole-% n-octyltriethoxysilane (C8) and a 1: 49: 50 mole-% C18/TDF/TEOS were prepared. Settlement of barnacle cyprids and removal of juvenile barnacles, settlement of zoospores of the alga Ulva linza, and strength of attachment of 7-day sporelings (young plants) of Ulva were compared amongst the xerogel formulations. Several of the xerogel formulations were comparable to poly(dimethylsiloxane) elastomer with respect to removal of juvenile barnacles and removal of sporeling biomass. The 1: 4: 45: 50 and 1: 14: 35: 50 C18/TDF/C8/TEOS xerogels displayed some phase segregation by atomic force microscopy (AFM) pre- and post-immersion in water. Imaging reflectance infrared microscopy showed the formation of islands of alkane-rich and perfluoroalkane-rich regions in these same xerogels both pre-and post-immersion in water. Surface energies were unchanged upon immersion in water for 48 h amongst the TDF-containing xerogel coatings. AFM measurements demonstrated that surface roughness on the 1: 4: 45: 50 and 1: 14: 35: 50 C18/TDF/C8/TEOS xerogel coatings decreased upon immersion in water.
Original languageEnglish
Pages (from-to)143-157
Number of pages15
JournalBiofouling
Volume28
Issue number2
DOIs
Publication statusPublished - 1 Jan 2012

Keywords

  • barnacle settlement
  • xerogels
  • topography
  • biofouling
  • fouling release
  • barnacle removal
  • Ulva zoospore settlement
  • perfluoroalkyl
  • macrofouling
  • Ulva sporeling removal

Fingerprint

Dive into the research topics of 'Spontaneous multiscale phase separation within fluorinated xerogel coatings for fouling-release surfaces'. Together they form a unique fingerprint.

Cite this