Abstract
The results of investigating the effect of ZnO nanoparticles in the structure of natural wood of silver birch on its physical-mechanical properties were presented. The possibility of synthesis of nanosized ZnO particles within the cavities of wood after ultrasound activated impregnation of an amorphous Zn(OH)2 gel into wood and subsequent drying at 110 oC was established. It was found out that doping with nanosized ZnO contributed hydrophobization of natural birch wood. It was observed that moisture absorbance of the wood doped with ZnO decreased in 4 times, water absorbance — by 30 % and swelling in radial and tangential directions — in 3,5 and 6 times correspondingly. An increase in the contact angle of wetting in 3,5 times was determined.
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