Earticle

초록

영어

This study investigates the crystallinity distribution of ancient silk. Owing to the inherent multi-hierarchical structure of silk protein and the complicated structural changes that occur due to various burial environments, it is challenging but worthwhile to study ancient silk ageing behavior, which is based on the fact that ageing begins with a single fiber and then spreads to a whole fabric. Crystallinity was one of the most effective indicators found to reveal the ageing status of silk. Therefore, a synchrotron radiation-based X-ray diffraction(SR-XRD) method was employed to study the crystallinity distribution of single fibers of ancient silk unearthed from seven archaeological sites in China from historical periods including the warring states, Han dynasty, Song dynasty, and Ming dynasty. In comparison, the conventional X-ray diffraction method, which uses large amounts of samples, was also performed to determine the integral crystallinity of ancient silk. Thermal stability experiments by thermogravimetry(TG) as well as morphology observations by scanning electron microscopy(SEM) and optical microscopy(OM) all confirmed the deterioration of ancient silk. Moreover, the ageing mechanism of ancient silk was proposed with the assistance of an artificial ageing study. The results confirmed the effectiveness of SR-XRD as an ageing indicator, revealing the crystallinity distribution. This research could provide motivation to determine the deterioration status of ancient silk, and would also aid in explaining the fragility of ancient silk due to ageing.

목차

ABSTRACT
1. INTRODUCTION
2. MATERIALS AND METHODS
2.1. Materials
2.2. SR-XRD experiment
2.3. Conventional XRD experiment
2.4. SEM and optical observation
2.5. Thermal stability
3. RESULTS AND DISCUSSION
3.1. OM and SEM observations
3.2. Distribution of crystallinity by SR-XRD
3.3. Conventional XRD of artificially aged silk
3.4. Conventional XRD of ancient silk
3.5. Thermal stability of ancient silk
3.6. Ageing mechanism
4. CONCLUSIONS
ACKNOWLEDGMENTS
REFERENCES

저자

• Decai Gong [ Basic Research Center of Conservation Science, Department of the History of Science and Scientific Archaeology, University of Science and Technology of China, Hefei 230026, China ]
• Xiaoning Zhang [ Basic Research Center of Conservation Science, Department of the History of Science and Scientific Archaeology, University of Science and Technology of China, Hefei 230026, China ]
• Yuxuan Gong [ Basic Research Center of Conservation Science, Department of the History of Science and Scientific Archaeology, University of Science and Technology of China, Hefei 230026, China ] Corresponding Author

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