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Properties of Siloxane Coatings Deposited in a Reel‐to‐Reel Atmospheric Pressure Plasma System
Author(s) -
Twomey Barry,
Dowling Denis,
Byrne Gerry,
O'Neill Liam,
O'Hare LesleyAnn
Publication year - 2007
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200731205
Subject(s) - reel , atmospheric pressure plasma , atmospheric pressure , materials science , siloxane , plasma , ambient pressure , composite material , mechanical engineering , engineering , physics , meteorology , nuclear physics , polymer
Abstract This study reports on the deposition of nanometre thick siloxane coatings on a poly(ethylene terephthalate) (PET) film using a reel‐to‐reel atmospheric pressure plasma system. Coatings were deposited in a helium/oxygen plasma, from the siloxane precursors poly(dimethylsiloxane), tetraethylorthosilicate, octamethylcyclotetrasiloxane and hexamethyldisiloxane. Through control of the processing conditions the chemistry of the deposited coatings were tailored to provide a range of hydrophilic (SiO x type) and hydrophobic [SiO(CH 3 ) x ] surfaces. The silicon‐containing coating surface energies were in the range of 28–70 mN · m −1 and these values were correlated with the surface chemistry. An increase in the hydrophilicity of the coating was found to be associated with a decrease in the concentration of methyl functional groups.