FTIR法研究出土木材化学结构及化学成分的变化  

FTIR Analysis on Changes of Chemical Structure and Compostions of Waterlogged Archaeological Wood

作　　者：邓启平[1] 李大纲[1] 张金萍[2] 

机构地区：[1]南京林业大学 [2]南京博物院,江苏南京210016

出　　处：《西北林学院学报》2008年第2期149-153,共5页Journal of Northwest Forestry University

基　　金：东北林业大学材料科学学院重点实验2004年度开放课题“木质文物劣化机理及新型防腐脱水加固剂的研究”(04-01)

摘　　要：为了使出土木材化学结构和化学成分不受破坏降解,该研究选用傅立叶变换红外光谱法(FTIR)对出土木材的化学结构和化学成分进行了分析。结果表明,出土木材在长期的地下水浸环境下降解严重,部分纤维素大分子链因降解而断裂形成了低分子链,同时纤维素结晶结构也遭到了破坏,使出土木材抗拉、抗弯及冲击韧性等强度大大降低;半纤维素几乎全部被降解而流失掉;木质素降解很少,但部分醚键连接的空间网状结构遭到了破坏,苯环结构单元中部分侧链中含有C=O共轭羰基的结构也发生了改变。A nondestructive analysis was carried out on the chemical structure and components of water logged archaeological wood （paulowmia spp. ） by fourier transform infrared spectroscopy（FTIR）. The results showed that waterlogged archaeological wood degraded heavily in water and underground for a long period of time. Some cellulose degraded to form short cellulose molecular rings, and the crystal structure of the cellulose was also destroyed, so the tensile strength, string strength and fragile ability of waterlogged archaeological wood decreased drastically. Almost all hemicellulose molecules underwent degradation. Lignin degraded a little, but some spatial network structures of lignin formed by ether bonds destroyed and conjugated carbonyl grouos in side rings of aromatic units also changed.

关 键 词：傅立叶变换红外光谱 出土木材 化学结构 化学成分 

分 类 号：S781.41[农业科学—木材科学与技术]