Quasi-static and dynamic nanoindentation to determine the influence of thermal treatment on the mechanical properties of bamboo cell walls

被引：44

作者：

Li, Yanjun ^{[2
,3
]}

Yin, Liping ^{[2
,3
]}

Huang, Chengjian ^{[2
,3
]}

Meng, Yujie ^{[1
]}

Fu, Feng ^{[4
]}

Wang, Siqun ^{[1
]}

Wu, Qiang ^{[2
,3
]}

机构：

[1] Univ Tennessee, Ctr Renewable Carbons, Knoxville, TN 37996 USA

[2] Zhejiang Agr & Forestry Univ, Sch Engn, Linan, Zhejiang, Peoples R China

[3] Key Lab Wood Sci & Technol, Linan, Zhejiang, Peoples R China

[4] Chinese Acad Forestry, Res Inst Wood Ind, Beijing, Peoples R China

来源：

HOLZFORSCHUNG | 2015年 / 69卷 / 07期

关键词：

bamboo; dynamic nanoindentation; heat treatment; quasi-static nanoindentation; VISCOELASTIC PROPERTIES; INSTRUMENTED INDENTATION; VIBRATIONAL PROPERTIES; MOISTURE-CONTENT; MODIFIED WOOD; CELLULOSE; FIBERS; HARDNESS; PERFORMANCE; STIFFNESS;

D O I：

10.1515/hf-2014-0112

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

Bamboo was thermally treated at 180 degrees C and 200 degrees C, and the micromechanical properties of its cell walls were investigated by means of quasi-static and dynamic nanoindentation experiments. With increasing treatment temperatures, the average dry density and mass of the bamboo decreased, whereas the already reduced elastic modulus at 180 degrees C of the fiber cell walls did not change, but the hardness showed increasing tendencies. Dynamic nanoindentation revealed reduced storage modulus (E-r') and loss modulus (Er '') for the thermotreated bamboo cell walls compared with the untreated bamboo fibers in all frequency regions. Moreover, E-r', E-r '', and loss tangent (tan delta) of treated bamboo decreased with increasing treatment temperature.

引用

页码：909 / 914

页数：6

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