Lignins as agents for bio-protection of wood

被引：35
作者：
Chirkova, Jelena [1 ]
Andersone, Ingeborga [1 ]
Irbe, Ilze [1 ]
Spince, Baiba [1 ]
Andersons, Bruno [1 ]
机构：
[1] Latvian State Inst Wood Chem, LV-1006 Riga, Latvia
来源：
HOLZFORSCHUNG | 2011年 / 65卷 / 04期
关键词：
decay resistance; density; lignin; modification; phenols; pinewood; water sorption; wood rot; WATER-RELATED PROPERTIES; THERMALLY MODIFIED WOOD; SCOTS PINE SAPWOOD; FAGUS-SYLVATICA L; ROT FUNGI; TREATED WOOD; PART; GLUTARALDEHYDE; PRESERVATIVES; CALORIMETRY;
D O I：
10.1515/HF.2011.092
中图分类号：
S7 [林业];
学科分类号：
0829 ; 0907 ;
摘要：
Pinewood was modified by vacuum impregnation with various aqueous lignin solutions of low concentration (0.5-1.0%) and its decay resistance was tested by the standard procedure EN 113. Five lignin types were tested against three brown rot and one white rot fungi. The bio-durability of wood was considerably increased by the treatment. The highest effect of modification was for alkali, kraft, hydrolysis lignins and industrial lignosulfonate, when mass losses of wood for brown-rot fungi were negligible. The effect of the modification with certified lignosulfonates was insignificant. Chemical analysis revealed that phenols, which are leached from lignin and are adsorbed by wood in the impregnation process, could act as a biocide. The hydrophilic properties of wood either did not change (certified lignins) or were enhanced because of some change in the pore structure (industrial lignins). Further tests are needed to verify the positive effects of this technologically simple and environmentally friendly treatment.
引用
收藏
页码：497 / 502
页数：6
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