Wettability and spectroscopic characterization of silylated wood samples

Ildikó Mohammed-Ziegler, Z. Hórvölgyi, A. Tóth, Willis Forsling, Allan Holmgren

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Surfaces of three European wood species (namely, English oak, Hungarian oak, and Scots pine) and two tropical wood species (namely, teak and cloves) were silylated with dichlorodimethylsilane (DDS), dichlorodiphenylsilane (DPS) and octadecyltrichlorosilane (OTS) in the first step, and with chlorotrimethylsilane (CTMS) as a monofunctional reagent in a second step. Attenuated total reflection-Fourier transform infrared (ATR-FT-IR) and electron spectroscopy for chemical analysis (ESCA) measurements were performed in order to characterize the surface composition of the treated samples. The progress of surface modification was also monitored by contact angle measurements of different test liquids (water, formamide and diiodomethane). The water contact angles were found to be in the range of 80° to 145°. The most hydrophobic surface was obtained by two-step silylation by OTS and CTMS (water contact angles were between 131° and 140°). Interestingly, the hydrophobicity of DDS-treated samples showed a significant decrease after additional silylation by CTMS. The surface free energy values were evaluated in terms of the Lifshitz-van der Waals/acid-base theory. The results obtained by the surface analytical methods (i.e. FT-IR and ESCA measurements) were compared with the contact angle data. These results suggest that in the case of DDS-treated samples, CTMS molecules substitute partly the DDS molecules, thus only physisorption of the silylating agents is supposed at room temperature.

Original languageEnglish
Pages (from-to)932-939
Number of pages8
JournalPolymers for Advanced Technologies
Volume17
Issue number11-12
DOIs
Publication statusPublished - Nov 2006

Fingerprint

Contact angle
Wetting
Wood
Electron spectroscopy
Water
Molecules
Physisorption
Hydrophobicity
Angle measurement
Chemical analysis
Surface structure
Free energy
Fourier transform infrared spectroscopy
Surface treatment
Infrared spectroscopy
Acids
trimethylchlorosilane
dichlorodimethylsilane
Liquids
Temperature

Keywords

  • ESCA/XPS
  • FT-IR
  • Silylation
  • Wood

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Wettability and spectroscopic characterization of silylated wood samples. / Mohammed-Ziegler, Ildikó; Hórvölgyi, Z.; Tóth, A.; Forsling, Willis; Holmgren, Allan.

In: Polymers for Advanced Technologies, Vol. 17, No. 11-12, 11.2006, p. 932-939.

Research output: Contribution to journalArticle

Mohammed-Ziegler, Ildikó ; Hórvölgyi, Z. ; Tóth, A. ; Forsling, Willis ; Holmgren, Allan. / Wettability and spectroscopic characterization of silylated wood samples. In: Polymers for Advanced Technologies. 2006 ; Vol. 17, No. 11-12. pp. 932-939.
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