Increasing hydrophobicity of surfaces of wood is essential to protect wood against weather. With the combination of different materials, we can significantly increase the effect of hydrophobicity. In this report, there are the results of testing of hydrophobicity of various cured products, which were prepared by mixing the linseed oil and compounds or formulations based on silanes. The hydrophobicity of the coating film was determined by measuring the contact angle of water droplets with automatic goniometer. To achieve water-repellency of spruce wood, the best performance was provided by the commercial product Silles and by the solution of octadecyltrichlorosilane (OTS) in hexane. Protective films from a mixture of linseed oil and OTS and OTS in the hexane solution were proved to be slightly worse, but they still provided adequate protection against the sorption of water. An attempt with the mixture of Silles and linseed oil was not successful, because the formulations were not miscible and the prepared emulsion rapidly separated into two layers.
|
