N. Terasawa et al., PREPARATION AND SURFACE CHARACTERISTICS OF PERFLUOROALKANE LANGMUIR-BLODGETT-FILMS, Journal of fluorine chemistry, 82(2), 1997, pp. 189-191
Surface pressure-area curves for the perfluoroalkanes C16F34, C20F42 a
nd C24F50 showed that monolayers were formed on the surface of water.
The monolayers of C20F42 and C24F50 were deposited on various substrat
es by the Langmuir-Blodgett (LB) technique; LB films on hydrophobized
mica show excellent water repellency with contact angles of water of 1
55 degrees and 153 degrees respectively. It was shown by comparison of
the reflection-absorption and transmission IR spectra that difluorome
thylene chains in the perfluoroalkane LB films are oriented perpendicu
lar to the substrate.