Evaluation of the antifungal effects of bio-oil prepared with lignocellulosic biomass using fast pyrolysis technology.
This study was performed to investigate the utility of bio-oil, produced via a fast pyrolysis process, as an antifungal agent against wood-rot fungi. Bio-oil solutions (25-100 wt.%) were prepared by diluting the bio-oil with EtOH. Wood block samples (yellow poplar and pitch pine) were treated with diluted bio-oil solutions and then subjected to a leaching process under hot water (70°C) for 72 h. After the wood block samples were thoroughly dried, they were subjected to a soil block test using Tyromyces palustris and Trametes versicolor. The antifungal effect of the 75% and 100% bio-oil solutions was the highest for both wood blocks. Scanning electron microscopy analysis indicated that some chemical components in the bio-oil solution could agglomerate together to form clusters in the inner part of the wood during the drying process, which could act as a wood preservative against fungal growth. According to GC/MS analysis, the components of the agglomerate were mainly phenolic compounds derived from lignin polymers.
Department of Forest Sciences and Research Institute for Agriculture and Life Science, Seoul National University, Seoul 151-921, South Korea.
Kwang Ho
KH
Kim
Han Seob
HS
Jeong
Jae-Young
JY
Kim
Gyu Seong
GS
Han
In-Gyu
IG
Choi
Joon Weon
JW
Choi
D000935:Antifungal Agents / Q000737:chemistry / Q000494:pharmacology*; D018533:Biomass; D000431:Ethanol / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D008031:Lignin / Q000737:chemistry*; D031567:Liriodendron / Q000737:chemistry; D009821:Oils / Q000737:chemistry / Q000494:pharmacology*; D010636:Phenols / Q000737:chemistry; D028223:Pinus / Q000737:chemistry; D020072:Polyporales / Q000187:drug effects; D055454:Trametes / Q000187:drug effects; D014934:Wood / Q000737:chemistry
D000935:Antifungal Agents; D009821:Oils; D010636:Phenols; C036909:lignocellulose; D000431:Ethanol; D008031:Lignin