Studying thermal conductivity of wood at cell wall level by scanning thermal microscopy (SThM)

被引：34

作者：

Vay, Oliver ^{[2
]}

Obersriebnig, Michael ^{[1
]}

Mueller, Ulrich ^{[2
]}

Konnerth, Johannes ^{[1
]}

Gindl-Altmutter, Wolfgang ^{[1
]}

机构：

[1] Univ Nat Resources & Life Sci, BOKU, Dept Mat Sci & Proc Technol, Vienna, Austria

[2] Kompetenzzentrum Holz GmbH, Linz, Austria

来源：

HOLZFORSCHUNG | 2013年 / 67卷 / 02期

关键词：

scanning thermal microscopy (SThM); thermal conductivity; wood cell wall; MECHANICAL-PROPERTIES; FORCE MICROSCOPY; NANOINDENTATION; FIBERS; AFM;

D O I：

10.1515/hf-2012-0052

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

Local variability in the thermal conductivity of the cell wall of beech wood fibers was studied by means of scanning thermal microscopy (SThM). In the cross section, the thermal conductivity of the secondary cell wall was essentially higher than that of the compound middle lamella (CML). In sections parallel to the cell axis, the overall conductivity of the Si layer was lower than that of the secondary cell wall, but the S2 layer and the CML showed similar conductivities. This is attributed to the orientation of the cellulose microfibrils playing a key role in the observed anisotropies concerning the thermal conductivity. The deviating thermal conductivities on different sections are attributed to the depth effect of the thermal scanning. SThM proves to be a technique with considerable potential for wood research.

引用

页码：155 / 159

页数：5

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