2种农作物秸秆纤维细胞壁的纳米力学性能  

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

作　　者：吴燕[1,2] 周定国[1] 王思群[1,2] 邢成[2] 张洋[1] 

机构地区：[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

出　　处：《林业科学》2010年第9期140-143,共4页Scientia Silvae Sinicae

基　　金：国家自然科学基金(30928022);中国博士后科学基金资助项目(20100471343);江苏省博士后科研资助计划项目(0902102C)

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19.4GPa;2种秸秆纤维细胞壁硬度数值分别为0.65和0.50GPa。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。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 aestivum） 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.

关 键 词：纳米压痕 农作物秸秆 细胞壁 纵向弹性模量 硬度 

分 类 号：TS102.2[轻工技术与工程—纺织工程]