文献类型：期刊文献

英文题名：Surface deterioration of moso bamboo (Phyllostachys pubescens) induced by exposure to artificial sunlight

作者：Wang, Xiao-Qing[1] Ren, Hai-Qing[1]

第一作者：王小青

通信作者：Ren, HQ[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100080, Peoples R China

年份：2009

卷号：55

期号：1

起止页码：47-52

外文期刊名：JOURNAL OF WOOD SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000263419200009)】；

基金：Acknowledgments This study was funded by the subproject of the National Science and Technology Support Program of China (no. 2006BAD19B04) and the National Natural Science Foundation of China (no. 30730076). The authors thank Mr. H. P. Yan and Mr. C. S. Li from our institute, and Mr. G. L. Tian and Mr. H. T. Chen from the International Center for Bamboo and Rattan, Beijing, China, for their helpful advice and technical support in carrying out the experiments.

语种：英文

外文关键词：Photodegradation; FT-IR; FT-Raman; Lignin; Bamboo

摘要：The effect of ultraviolet-visible light irradiation on changes in surface chemistry and morphology of moso bamboo (Phyllostachys pubescens Mazel) was investigated. Fourier transform infrared (FT-IR) and FT-Raman spectroscopy were used in combination to study chemical changes induced by exposure to artificial sunlight (xenon lamp) for up to 160 h, and the resulting physical changes of cell walls of bamboo surfaces were examined by scanning electron microscopy (SEM). FT-IR results showed that significant changes occurred in the lignin component as indicated by considerable decreases in the intensities of the characteristic aromatic lignin peak at 1512 cm(-1) and other associated bands. This was accompanied by formation of new carbonyl groups at 1735 cm(-1), resulting in photooxidation of bamboo surfaces. The photosensitive nature of bamboo lignin was also demonstrated by FT-Raman analysis, in which obvious decreases in intensities of Raman bands at 1604 and 1630 cm(-1) mainly derived from lignin and free and esterified p-coumaric and ferulic acids were observed. SEM micrographs of the irradiated cross sections of bamboo revealed that significant damage occurred to the fiber walls, whereas the parenchyma cells exhibited slight distortion and some cracks occurred in the cell walls. The structures of cell corners and middle lamellae were nearly intact after irradiation.