Surface characteristics and wetting properties of sol-gel coated base paper

S. Wang (Corresponding Author), Riitta Mahlberg, Juha Nikkola, Juha Mannila, Saila Jämsä, Anne Ritschkoff, J. Peltonen

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)539-547
Number of pages9
JournalSurface and Interface Analysis
Volume44
Issue number5
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • sol-gel coating
  • wetting
  • base paper
  • surface property

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