Furfurylation of tropical wood species with and without silver nanoparticles: Part II: Evaluation of wood properties

The purpose of the work was to assess the combined effect of furfurylation, along with the addition of silver nanoparticles (NPsAg), on the thermal stability, density, water absorption, hardness and biological durability of juvenile tropical woods originating from Costa Rican forest plantations. It was demonstrated that the weight percentage gain (WPG) of wood treated with furfuryl alcohol (FA) varied from 14.44% to 44.26%, and from 12.92% to 44.52% after the addition of NPsAg. Additionally, for species with WPG over 25%, thermal stability as well as durability was greater, while water absorption was lower, compared to species with lower WPGs. Improvement of hardness was only achieved with WPG values over 35%; therefore, only species of high permeability (V. ferruginea, V. guatemalensis, C. odorata, S. saman and E. cyclocarpum) showed improvement regarding this property. The addition of NPsAg induced the same behaviour as when using plain FA treatment, however, regarding wood durability, the addition of NPsAg was effective only for species with WPG under 20%.

Automated summary

The purpose of this study was to assess the combined effect of furfurylation and the addition of silver nanoparticles on the properties of tropical woods. The results showed that higher weight percentage gain improved thermal stability and durability, and reduced water absorption. Improvement in hardness was only observed in species with high permeability. The addition of silver nanoparticles only effectively enhanced wood durability in species with weight percentage gain below 20%.