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林业科学 ›› 2010, Vol. 46 ›› Issue (9): 140-143.doi: 10.11707/j.1001-7488.20100923

• 论文 • 上一篇    下一篇

2种农作物秸秆纤维细胞壁的纳米力学性能

吴燕1,2,周定国1,王思群1,2,邢成2,张洋1   

  1. 1.南京林业大学木材工业学院 南京 210037; 2.田纳西大学林产品中心 田纳西州 37996
  • 收稿日期:2008-12-19 修回日期:2009-04-03 出版日期:2010-09-25 发布日期:2010-09-25
  • 通讯作者: 周定国

Nano-Mechanical Properties of the Cell Wall of Two Crop Straws

Wu Yan1,2;Zhou Dingguo1;Wang Siqun1,2;Xing Cheng2;Zhang Yang1   

  1. 1.College of Wood Science and Technology, Nanjing Forestry University Nanjing 210037; 2.Forest Products Center,University of Tennessee TN USA 37996
  • Received:2008-12-19 Revised:2009-04-03 Online:2010-09-25 Published:2010-09-25

摘要:

利用纳米压痕仪对2种农作物秸秆纤维细胞壁的纳米力学性能进行研究。结果表明: 麦秸纤维细胞壁纵向弹性模量高于稻秸纤维细胞壁纵向弹性模量,其数值分别为20.8和19.4 GPa; 2种秸秆纤维细胞壁硬度数值分别为0.65和0.50 GPa。在纳米尺度下,秸秆纤维细胞壁纵向弹性模量低于多数阔叶树材,但高于针叶树材和再生纤维素纤维,其细胞壁硬度的平均值高于木材及再生纤维素纤维。

关键词: 纳米压痕, 农作物秸秆, 细胞壁, 纵向弹性模量, 硬度

Abstract:

The nano-mechanical properties of the cell wall of two crop straws were investigated by nanoindentation. The results showed: the longitudinal elastic modulus of wheat (Triticum aestivuma) straw was higher than one of rice (Oryza sativa) straw, which was 20.8 and 19.4 GPa, respectively. The values of hardness were 0.65 and 0.50 GPa, respectively. At the nano-scale, the longitudinal elastic modulus in crop straws were lower than that in most of the hardwood species, but higher than that in some softwoods and lyocell fiber. The mean value of hardness of cell walls of crop straws was higher than that of wood and lyocell fiber.

Key words: nanoindentation, crop straw, cell wall, longitudinal elastic modulus, hardness