响叶杨细胞壁尺寸参数及其纳米压痕特性  

Dimension Parameters and Nanoindentation of Populus adenopoda Wood Cell

作　　者：周兆兵[1] 徐朝阳[1] 张洋[1] 王思群[2] 

机构地区：[1]南京林业大学木材工业学院,南京210037 [2]美国田纳西大学林产品中心,诺克斯维尔379964570

出　　处：《林业科学》2010年第11期138-143,共6页Scientia Silvae Sinicae

基　　金：国家自然科学基金(30671640)

摘　　要：利用原子力显微镜对响叶杨细胞的特征参数与形貌进行分析,并对响叶杨细胞壁表面的纳米压弹性进行测量。结果表明:响叶杨细胞横截面的壁厚平均尺寸为2.230μm;壁长平均尺寸为9.498μm;细胞外径为9.023～26.802μm,平均尺寸为19.723μm;响叶杨细胞壁S2层(大约位于细胞壁的中部)上的压痕点为有效测试值,其平均弹性模量和硬度可以用来代表细胞壁的纵向硬度和弹性模量,即所选择的响叶杨细胞壁的平均弹性模量和硬度分别为18.52GPa和478.59MPa。Atomic force microscope and nanoindentation have become important tools for the research of wood material at micro and nano-level scale.In this paper,the characteristic parameters and nanoindentayion of Populus adenopoda cell wall were measured based on AFM and indentor.The results showed that the mean width of P.adenopoda cell wall was 2.230 μm,the mean length was 9.498 μm,and the mean diameter was 19.732 μm.The indents made on the S2 layer of P.adenopoda cell wall,the mid-width of the cell wall,were all effective nanoindentation tests,which could be used to represent the elastic modulus and hardness of the whole P.adenopoda cell wall.The means of elastic modulus and hardness of P.adenopoda cell wall were 18.52 GPa and 478.59 MPa,respectively.

关 键 词：原子力显微镜 纳米压痕 响叶杨 弹性模量 硬度 

分 类 号：S781.29[农业科学—木材科学与技术]