林业科学2011，Vol.47Issue(10)：134-140,7.
氮气吸附法表征杨木应拉木的孔隙结构
Pore Structure Characterization of Poplar Tension Wood by Nitrogen Adsorption-Desorption Method
摘要
Abstract
Based on the conventional anatomical analysis, the pore structures of poplar tension wood, such as specific surface area, pore volume and pore size distributions were characterized by nitrogen adsorption-desorption method. The shapes of the pores were estimated by nitrogen adsorption isotherms. The results show that poplar tension wood with BET specific surface area of 21. 9 m2 ·g-1, which is 13 times higher than that in opposite wood. Poplar tension wood has intact mesoporosity { pore size between 2-50 nm) with inkbottle and slit shape pore, as well as a certain amount of micropores and macropores. The maximum value of pore size distribution appears at 5 nm. The pore volume with diameter ranging from 4-7 nm makes up 74.4% of the total, and larger than 15 nm, 10. 8% . The high amount of mesopores can be attributed to the thick gelatinous layer in poplar tension wood.关键词
应拉木/孔隙结构/氮气吸附法Key words
tension wood/pore structure/nitrogen adsorption-desorption method分类
农业科技引用本文复制引用
苌姗姗,胡进波,Clair Bruno,Quignard Franqoise..氮气吸附法表征杨木应拉木的孔隙结构[J].林业科学,2011,47(10):134-140,7.基金项目
湖南省自然科学基金资助项目(11 JJ4026),高等学校博士学科点专项科研基金资助课题(20104321120003),中南林业科技大学引进高层次人才科研启动基金资助课题(1040110),湖南省教育厅资助科研项目(09C1007),中南林业科技大学校青年基金资助课题(2008030B). （11 JJ4026）
