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Silicon‐Modified Carbohydrate Surfactants V: The Wetting Behaviour of Low‐Molecular‐Weight Siloxane, Carbosilane, Silane and Polysilane Precursors on Low‐Energy Surfaces
Author(s) -
Wagner R.,
Richter L.,
Wu Y.,
Weißmüller J.,
Reiners J.,
Hengge E.,
Kleewein A.,
Hassler K.
Publication year - 1997
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/(sici)1099-0739(199708)11:8<645::aid-aoc600>3.0.co;2-0
Subject(s) - siloxane , chemistry , wetting , polysilane , silane , contact angle , silanes , surface tension , polymer chemistry , surface energy , silicon , acceptor , molecule , chemical engineering , organic chemistry , thermodynamics , polymer , physics , engineering , condensed matter physics
The surface tensions, wetting tensions, contact angles and solid/liquid interfacial tensions of defined siloxanes as well as those of analogous carbosilanes, polysilanes and neopentyl substituted silanes were determined. The wetting experiments were carried out on a glass plate coated with perfluoroalkyl methacrylate (FC 722 ® ). The siloxanes possess the lowest surface tensions. Due to the presence of oxygen atoms in the siloxane backbone, a donor–acceptor portion (γ +/− lv ) of the surface tension of about 1–2 mN/m was determined. The solid/liquid interfacial tension also contains a donor–acceptor portion (γ +/− sl ). Its value is almost identical to that of γ +/− lv . The γ +/− sl differences between individual molecules of the same surface tension are responsible for contact angle differences of up to 4°. © 1997 John Wiley & Sons, Ltd.