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Surface characteristics and wetting properties of sol–gel coated base paper
Author(s) -
Wang Shaoxia,
Mahlberg Riitta,
Nikkola Juha,
Mannila Juha,
Jämsä Saila,
Ritschkoff AnneChristine,
Peltonen Jouko
Publication year - 2012
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.3841
Subject(s) - wetting , contact angle , scanning electron microscope , secondary ion mass spectrometry , x ray photoelectron spectroscopy , materials science , base (topology) , coating , sol gel , chemical engineering , porosity , surface roughness , analytical chemistry (journal) , mass spectrometry , thin film , composite material , chemistry , nanotechnology , chromatography , mathematical analysis , mathematics , engineering
Two hybrid coatings synthesized by using alkoxysilanes as precursors in a sol–gel process, differing from each other in terms of the organic components in alkoxysilanes, have been developed to improve the water repellent properties of base paper. The sol–gel‐coated base paper samples were characterized by scanning electron microscopy, atomic force microscopy, confocal laser scanning microscopy, X‐ray photoelectron spectroscopy, time‐of‐flight secondary ion mass spectrometry, and contact angle measurements. The sol–gel coatings were found to clearly change the surface properties of base paper. Thin coating layers were formed on base paper surfaces. The topographical data indicated the formation of discontinuous thin films; the time‐of‐flight secondary ion mass spectrometry analyses confirmed that the coatings were covering the fibres but only partially covered the fibre–fibre intersections. Water and the subsequent heat treatment used as a reference treatment reduced the surface roughness and porosity and slightly changed the surface chemistry of the base paper. The wettability and absorptivity of base paper was clearly reduced by the applied coatings. Copyright © 2011 John Wiley & Sons, Ltd.