红外光谱在古代丝织品的纤维聚集态结构表征中的应用研究  

Application of Infrared Spectroscopy in Characterizing Fiber Aggregation Structure of Ancient Silk Fabrics

作　　者：龚德才[1] 刘柳[1] 朱展云 

机构地区：[1]中国科学技术大学科技史与科技考古系,中国科学技术大学文物保护科学基础研究中心,合肥230026

出　　处：《蚕业科学》2015年第4期694-700,共7页ACTA SERICOLOGICA SINICA

基　　金：国家文物局标准项目(No.20111488)

摘　　要：丝织品极易受到外界环境因素的作用而发生降解,造成蚕丝纤维分子结构的变化。利用偏振红外光谱(Pol-ATR)和衰减全反射红外光谱(ATR-FTIR)技术,以古代丝织品及现代丝织品模拟老化样品为材料,通过对蚕丝纤维取向度和结晶度的分析,探讨丝织品降解过程中蚕丝纤维聚集态结构的变化规律。模拟老化样品随着老化时间的延长,出现蚕丝纤维取向度下降的现象,蚕丝纤维中大分子沿纤维轴方向取优势排列的趋向被打破;而蚕丝纤维的结晶度则随老化进程呈现先上升后下降的趋势,符合丝织品的降解机理。研究结果提示,利用红外光谱技术能够有效分析古代丝织品的纤维聚集态结构的变化规律,从而评价丝织品的老化程度。Silk fabrics are easily affected by surroundings and then suffered from degradation which result in structural change of silk fiber. In order to understand the variation regularity of silk fiber during the degradation of silk fabrics,ancient silk relics and modern simulated ageing silk relics were used as material for analyzing the orientation degree and crystalline degree of silk fiber by polarized infrared spectra and attenuated total reflectance-Fourier transfer infrared spectrum（ ATR-FTIR） techniques. The results showed that orientation degree of silk fiber experienced a slightly decrease during degradation due to the change of macromolecule arrangement towards fiber axis. However,the crystalline degree showed a tendency of rise first and then declined with aging durations,which was in accordance with degradation mechanism of silk fabrics. These results suggest that infrared spectra could be used to analyze the variation regularity of fiber aggregation structure and evaluate the aging degree of silk fabrics.

关 键 词：蚕丝纤维 红外光谱 取向度 结晶度 老化程度 

分 类 号：TS107[轻工技术与工程—纺织工程] O657.33[轻工技术与工程—纺织科学与工程]