北京林业大学学报2012，Vol.34Issue(5)：139-143,5.
强化复合木材细胞壁的纳米压痕测试分析
Nanoindentation test and analysis of cell wall of strengthened composite wood
摘要
Abstract
The mechanical properties and elastic-plastic of samples untreated and strengthened by silica sol using nanoindentation method were tested and analyzed. And the impacts of silica sol location on micro- mechanical properties of wood cell wall were also analyzed in this paper. The testing results indicated that: 1 ) the silica sol can be introduced into wood cell wall through impregnating process,and the modulus and hardness of cell wall of composite wood were 18. 64 and 0. 64 GPa,increased by 59% and 31% than untreated wood,respectively. 2) Two kinds of composite wood,the modified cell wall and the bulked cell wall,can be prepared through different vacuum-pressure processes,and the modulus and hardness of the two kinds of composite wood had no significant differences. It was indicated clearly that the filled lumina had no effects on the nano-mechanical properties of wood cell wall. 3 ) The cell wall morphology of the composite wood and testing curve analysis of nanoindentation showed that the wood cell wall after silica sol treated had the same relative elastic recovery rate with that of untreated wood,and still maintained the good elastic properties.关键词
复合木材/细胞壁/纳米压痕Key words
composite wood/cell wall/nanoindentation分类
农业科技引用本文复制引用
林兰英,傅峰..强化复合木材细胞壁的纳米压痕测试分析[J].北京林业大学学报,2012,34(5):139-143,5.基金项目
国家自然科学基金青年科学基金项目（31000272）、中央级公益科研院所基本科研业务费专项（CAFINT2009C06）. （）
