文献类型：期刊文献

英文题名：Studies on the nanostructure of the cell wall of bamboo using X-ray scattering

作者：Wang, Yurong[2] Leppanen, Kirsi[1] Andersson, Seppo[1] Serimaa, Ritva[1] Ren, Haiqing[2] Fei, Benhua[3]

第一作者：王玉荣

通信作者：Leppanen, K[1]

机构：[1]Univ Helsinki, Dept Phys, Helsinki 00014, Finland;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[3]Int Ctr Bamboo & Rattan, Beijing 100102, Peoples R China

年份：2012

卷号：46

期号：1-3

起止页码：317-332

外文期刊名：WOOD SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20120314694539);Scopus(收录号：2-s2.0-84855778278);WOS:【SCI-EXPANDED(收录号:WOS:000298993100023)】；

基金：The work was supported by the National Natural Science Foundation (30730076), National Key Technology R&D Program in the 11th Five Year Plan of China (2008BADA9B03), Academy of Finland (1127759), and Helsinki University funds. K.L. thanks the National Graduate School in Materials Physics for the financial support.

语种：英文

外文关键词：Bamboo - Beams and girders - Crystallinity - Functionally graded materials - Nanostructures - X ray scattering

摘要：The relationship between the nanostructure of Moso bamboo (Phyllostachys edulis (Carr.) H. De Lehaie) and the radial distance from the lacuna and the age of the culm was studied using X-ray scattering and electron microscopy. The size of cellulose crystallites and the crystallinity increased, and the mean microfibril angle decreased from about 40A(0) in the inner part to about 10A(0) in the outer part of the culm showing that bamboo is a functionally graded material at the nanoscale. The mean thickness and length of crystallites in the 4.5-year-old sample from the inner to outer part of the culm were 29.6 +/- A 1.0 , 30.7 +/- A 0.5 , 31.6 +/- A 0.5 , and 247 +/- A 10 , 303 +/- A 10 , 328 +/- A 10 , respectively. The length of crystallites in the inner part of 0.5-year-old bamboo and in the outer part of 10.5-year-old bamboo was 30-40 lower than in the corresponding parts of the 4.5-year-old sample. The crystallinity and the thickness of crystallites showed no age-dependence.