Barta César, Fernández-Álvarez María, Ruiz-Navas Elisa María
Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química, Universdad Carlos III de Madrid, Avenida de la Universidad, 30, 28911 Leganés, Spain.
Electroceramic Department, Instituto de Cerámica y Vidrio (ICV), CSIC, Kelsen 5, 28049 Madrid, Spain.
Polymers (Basel). 2024 Dec 3;16(23):3401. doi: 10.3390/polym16233401.
This work describes the effects of using neutron irradiation on cellulose and non-destructive methods to analyze linen fabrics of high heritage value. For this purpose, 8 samples were irradiated with increasing doses of neutrons and gamma rays up to 166 kGy of total dose. The samples were characterized by techniques such as ultraviolet luminescence, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, Raman spectroscopy, and the nuclear magnetic resonance (NMR) technique. The luminescence of linen fabrics in the ultraviolet range increases markedly with dosage. Some chemical changes were also perceived by the ATR-FTIR spectra in the linen samples. Similarly, the fluorescence background observed in Raman spectroscopy intensifies with dosage. Due to the heterogeneity of the textile cellulose, NMR offers limited applicability for detecting neutron doses in cultural heritage fabrics. Radiation is applied for preservation against microorganisms in cultural heritage objects where the damage is to be assessed. This radiation can occasionally be found after earthquakes or in volcanic archaeological sites, which could question its dating using carbon 14. Despite some limitations encountered due to working with commonly used linen fabrics, the techniques employed in this study have made it possible to observe trends between the responses obtained and the irradiation dose for each linen sample.
这项工作描述了使用中子辐照对纤维素的影响以及分析具有高文物价值亚麻织物的无损方法。为此，用高达166千戈瑞的总剂量，以递增剂量的中子和伽马射线对8个样品进行辐照。通过诸如紫外发光、衰减全反射傅里叶变换红外（ATR-FTIR）光谱、拉曼光谱和核磁共振（NMR）技术等对样品进行表征。亚麻织物在紫外范围内的发光随剂量显著增加。亚麻样品的ATR-FTIR光谱也察觉到了一些化学变化。同样，拉曼光谱中观察到的荧光背景随剂量增强。由于纺织纤维素的异质性，NMR在检测文化遗产织物中的中子剂量方面适用性有限。辐射用于文化遗产物品中防止微生物侵害，在此需评估损害情况。这种辐射偶尔会在地震后或火山考古遗址中发现，这可能会对其使用碳14进行年代测定产生疑问。尽管在处理常用亚麻织物时遇到了一些限制，但本研究中采用的技术使得观察每个亚麻样品获得的响应与辐照剂量之间的趋势成为可能。
