Effect of Furfurylation on Hierarchical Porous Structure of Poplar Wood

Some wood properties (such as permeability and acoustic properties) are closely related to its hierarchical porous structure, which is responsible for its potential applications. In this study, the effect of wood impregnation with furfuryl alcohol on its hierarchical porous structure was investigated by microscopy, mercury intrusion porosimetry and nuclear magnetic resonance cryoporometry. Results indicated decreasing lumina diameters and increasing cell wall thickness of various cells after modification. These alterations became serious with enhancing weight percent gain (WPG). Some perforations and pits were also occluded. Compared with those of untreated wood, the porosity and pore volume of two furfurylated woods decreased at most of the pore diameters, which became more remarkable with raising WPG. The majority of pore sizes (diameters of 1000 similar to 100,000 nm and 10 similar to 80 nm) of macrospores and micro-mesopores of two furfurylated woods were the same as those of untreated wood. This work could offer thorough knowledge of the hierarchical porous structure of impregnatedly modified wood and pore-related properties, thereby providing guidance for subsequent wood processing and value-added applications.

Automated summary

The study investigated the effect of wood impregnation with furfuryl alcohol on its hierarchical porous structure. Results showed that lumina diameters decreased, cell wall thickness increased, and some perforations and pits were occluded. Porosity and pore volume decreased in furfurylated woods compared to untreated wood, with the alterations becoming more remarkable with higher weight percent gain.