红外二阶导数谱图特征在中国古纸纤维无损鉴别中的应用

Application of FT-IR Second Derivative Spectrum Characteristics in Nondestructive Fiber Identification of Ancient Chinese Paper

中文关键词:  红外光谱二阶导数  衰减全反射傅里叶变换红外光谱  中国古纸  纤维无损鉴别

Key Words:Infrared Spectroscopy Second Derivative  Attenuated Total Reflection Fourier Transformed  Chinese ancient paper  non-destructive fiber identification

中文摘要:

      纤维种类鉴别是古代纸张研究与保护的重要基础工作，探究中国古纸的无损纤维鉴别方法对中国古籍、档案及纸质文物的研究和保护具有重要意义。本研究利用衰减全反射傅里叶变换红外光谱（ATR-FTIR），对65种已知纤维成分的标准纸张样品进行无损纤维成分鉴别，总结了各类标准纸张样品在1500~1200 cm^-1和1200~900 cm^-1 2个波数范围的FT-IR二阶导数谱图特征，并根据FT-IR二阶导数谱图计算所得的结晶度，实现纸张种类的准确区分。137个古纸的有效性测试结果表明，通过FT-IR二阶导数谱图解析，可对古纸纤维成分进行有效的无损鉴别。对于单一纤维成分的原纸，FT-IR二阶导数谱图解析可达到与显微分析相当的水平；对于加工纸，FT-IR二阶导数谱图可有效去除填料等添加剂的谱峰干扰，实现纤维成分的准确鉴别；对于混料纸，可通过FT-IR二阶导数谱图判断混料组成成分的主要类别。因此，FT-IR二阶导数谱图分析技术在中国古纸纤维无损鉴别领域具有良好的应用前景。

Abstract:

      The species identification of fiber is an important work for the research and conservation of ancient paper. Exploring a non-destructive fiber identification method of Chinese ancient paper is of great significance to the research and conservation of Chinese ancient books， archives and paper-made cultural relics. In this study， Attenuated Total Reflection Fourier Transformed was used to achieve non-destructive fiber identification by analyzing 65 kinds of standard paper samples. FT-IR Second Derivative spectrum characteristics of each kind of paper were summarized respectively in the bands of 1500~1200 cm^-1 and 1200~900 cm^-1. Through crystallinity index calculated from FT-IR Second Derivative spectrum， a more detailed distinction of each kind of paper was achieved. The validity test results of 137 ancient paper samples showed that the fiber composition of ancient paper can be effectively identified by FT-IR Second Derivative spectrum analysis. For raw paper made from single kind of fiber， FT-IR Second Derivative spectrum can reach a level comparable to microscopic analysis. For coated paper， it can identify the fiber accurately by FT-IR Second Derivative spectrum without spectral peaks interference of additives. For mixed paper， the categories of components in mixed fibers can also be identified through FT-IR Second Derivative spectrum. Therefore， FT-IR Second Derivative spectrum analysis has a great application prospect in the nondestructive identification for ancient Chinese paper fibers.