Moisture diffusion coefficient of reaction woods: compression wood of Picea abies L. and tension wood of Fagus sylvatica L.

被引：35

作者：

Tarmian, Asghar ^{[2
]}

Remond, Romain ^{[1
]}

Dashti, Hadi ^{[2
]}

Perre, Patrick ^{[1
]}

机构：

[1] AgroParisTech, LERFOB 14 UMR1092, F-54042 Nancy, France

[2] Univ Tehran, Fac Nat Resources, Dept Wood Sci & Technol, Karaj, Iran

来源：

WOOD SCIENCE AND TECHNOLOGY | 2012年 / 46卷 / 1-3期

关键词：

PART; 2; WATER; HOMOGENIZATION; PERMEABILITY; KINETICS; STEAM; PINE;

D O I：

10.1007/s00226-011-0413-3

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The moisture diffusion coefficient of compression wood in spruce (P. abies) and tension wood in beech (F. sylvatica) was examined. The results indicated that the diffusion coefficient measured under steady-state condition (cup method) could well characterize the drying kinetics of the reaction woods. The compression wood offered more resistance to the moisture diffusivity when compared with the corresponding normal wood. The thick cell wall rich in lignin explains the small mass diffusivity in compression wood. In contrast, the mass diffusivity in beech is almost always higher in tension wood than in normal wood, in spite of similar density values. The high moisture diffusion in tension wood can be explained by the ease of bound water diffusion in the gelatinous layers (G-layers).

引用

页码：405 / 417

页数：13

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