Effect of the amount of lignin on tensile properties of single wood fibers  

作　　者：Shuang-Yan ZHANG Ben-Hua FEI Yan YU Hai-Tao CHENG Chuan-Gui WANG 

机构地区：[1]School of Forestry and Landscape Architecture, Anhui Agricultural University [2]State Forestry Administration Key Laboratory on Bamboo and Rattan Science and Technology [3]International Center for Bamboo and Rattan

出　　处：《Forestry Studies in China》2013年第1期56-60,共5页中国林学（英文版）

基　　金：supported by the Key Program of the National Natural Science Foundation of China (Grant No. 30730076)

摘　　要：Chemical components are the main factors affecting the mechanical properties of wood fibers. Lignin is one of the main components of wood cell walls and has a critical effect on the mechanical properties of paper pulp and wood fiber based composites. In this study, we carried out tensile tests on single mature latewood tracheids of Chi- nese fir （Cunninghamia lanciolata （Lamb.） Hook.）, using three different delignified treatment methods to obtain different amounts of lignin. We applied single fiber tests to study the effect of the amount of lignin on mechanical tensile proper- ties of single wood fibers at the cellular level. The results show that in their dry state, the modulus of elasticity of single fi- bers decreased with the reduction in the amount of Iignin; even their absolute values were not high. The amount of lignin affects the tensile strength and elongation of single fibers considerably. Tensile strength and elongation of single fibers increase with a reduction in the amount of lignin.Chemical components are the main factors affecting the mechanical properties of wood fibers. Lignin is one of the main components of wood cell walls and has a critical effect on the mechanical properties of paper pulp and wood fiber based composites. In this study, we carried out tensile tests on single mature latewood tracheids of Chi- nese fir （Cunninghamia lanciolata （Lamb.） Hook.）, using three different delignified treatment methods to obtain different amounts of lignin. We applied single fiber tests to study the effect of the amount of lignin on mechanical tensile proper- ties of single wood fibers at the cellular level. The results show that in their dry state, the modulus of elasticity of single fi- bers decreased with the reduction in the amount of Iignin; even their absolute values were not high. The amount of lignin affects the tensile strength and elongation of single fibers considerably. Tensile strength and elongation of single fibers increase with a reduction in the amount of lignin.

关 键 词：single fiber LIGNIN modulus of elasticity （MOE） tensile strength ELONGATION 

分 类 号：TQ351.0[化学工程]