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One aim of this work was the chemical modification of surfaces of Scots pine ( Pinus sylvestris  L.) sapwood veneer chips by covalently bonded substances for improved hydrophobicity. The durable attachment of organosilyl moieties to the surface was in focus. Several benzotriazolyl-activated  p -silylated benzoic acid derivatives were applied to the esterification of OH groups at different temperatures and reaction times. The reactions resulted in weight percent gains from 8% to 43% and corresponding quantities of covalently bonded organomaterials of 0.3–2.1 mmol g -1  wood. The hydrophobicity was significantly increased as indicated by contact angles from 121° to 142°. All modified wood samples were analyzed by attenuated total reflection-infrared, contact angle measurements, and X-ray photoelectron spectroscopy.

holzforschung

Chemical improvement of surfaces. Part 4: Significantly enhanced hydrophobicity of wood by covalent modification with  p -silyl-functionalized benzoates