FTIR法研究出土木材化学结构和化学成分的变化.pdfVIP

2008, 23( 2) : 149~ 153 Journal of Northwest Forestry Uni ersity FTIR * 1, 2 1 3 邓启平 , 李大纲 , 张金萍 ( 1. , , 210037; 2. , , 650224; 3. , , 210016) : 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 光谱法 ( FT IR) 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 : 傅立叶变换红 光谱; 出土木材; 化学结构; 化学成分 : S781. 41 : A : 2008) FT IR Analy sis on Changes of Chemical Structure and Compostions of Waterlogged Archaeological Wood 1, 2 1 3 DENG Qiping , LI Dagang , ZHANG Jinping ( 1. N anj ing F or estr y Univ er sity , N anj ing, J iang su 210037, China; 2. S outhw est Forestry Colleg e, K unming , Yunna 650224 , China; 3. N anj ing M useum , N anj ing, J iang su 210016, China) Abstract: A nondestructi e analysis w as carried out on the chemical structure and components of w ater logged archaeological w ood ( aulow nia spp. ) by fourier transform infr ar ed spectroscopy( FT IR) . The re sults show ed that w aterlogged archaeological w ood degraded hea ily in w ater and underground for a long period of time. Some cellulose degraded to for m short cellulose molecular rings, and the crystal structure of the cellulose w as also destr oyed, so the tensile strength, string strength and fragile ability of w aterlogged ar chaeological w ood decreased dr astically. A lmost all hemicellulose molecules underw ent degradation. Lig nin degr aded a little, but some spatial netw ork structures of lignin for med by ether bonds