Abstract
The present research deals with a simple dipping method to insert octadecyltrichlorosilane (OTS) into cell walls of spruce wood and to deposit OTS layers on its inner and outer surfaces. Distribution and chemical interactions of OTS with wood polymers has been investigated by scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy. The OTS/n-hexane solution penetrated into wood via capillary forces through ray tracheids and bordered pits and was deposited as OTS organic-inorganic layers on wood cell walls. The hypothesis is supported by the results, according to which the OTS molecules are hydrolysed by the wood moisture and by free OH groups of the cell wall components. The hydrolysed OTS molecules react with the OH groups and elevate the hydrophobicity of wood.
Acknowledgments
The authors wish to acknowledge Project LO1605 funded by the Ministry of Education, Youth and Sports within National Sustainability Programme I, the Czech Republic. Financial support of the Slovenian Research Agency through the research programme P4-0015 “Wood and lignocellulose composites” is also gratefully acknowledged. The authors acknowledge the support of Dr. Andrijana Sever Škapin and Dr. Janez Kovač for conducting the SEM and XPS analyses of the wood samples.
References
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