Zhang Mingliang, Zhao Jinchan, Wang Sinong, Dai Zhenyu, Qin Shuaitao, Mei Shiliang, Zhang Wanlu, Guo Ruiqian
Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China.
Institute for Preservation and Conservation of Chinese Ancient Books, Fudan University Library, Fudan University, Shanghai 200433, China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt A):593-601. doi: 10.1016/j.jcis.2024.08.134. Epub 2024 Aug 22.
Paper-based relics is an important carrier for recording and preserving information, however, it faces irreversible UV-induced damage, including photocleavage, oxidation, acidification and discoloration, which seriously affects its value and lifespan. Carbon dots (CDs) possess excellent UV absorption and good chemical stability, making them suitable for UV protection. Herein, we propose a high-security and efficient method utilizing CDs films (CDFs) for preventive protection of paper against UV damage. The CDFs with high tunable UV absorbance and minimal absorbance in the visible light range, effectively shield paper from UV radiation while preserving its visual appeal. Moreover, the UV transmittance of the film can be fine-tuned to the content of CDs and can be easily removed from the paper without residue. Artificial accelerated UV aging experiments demonstrate the deceleration of acidification, oxidation, and photocleavage in the protected bamboo paper and Xuan paper. This research paces a new direction for the protection of paper and paper-based relics and artworks with emerging carbon materials, offering customizable protection effects tailored to specific preservation and exhibition requirements. This research pioneers a novel approach to preventive protection of paper and paper-based relics using emerging carbon dots materials, offering tailored protection for diverse preservation needs.
纸质文物是记录和保存信息的重要载体，然而，它面临着不可逆转的紫外线诱导损伤，包括光裂解、氧化、酸化和变色，这严重影响了其价值和寿命。碳点（CDs）具有优异的紫外线吸收能力和良好的化学稳定性，使其适用于紫外线防护。在此，我们提出了一种利用碳点薄膜（CDFs）对纸张进行紫外线损伤预防性保护的高安全性和高效方法。具有高度可调紫外线吸收率且在可见光范围内吸收率极低的CDFs，在保护纸张视觉效果的同时，有效地屏蔽了紫外线辐射。此外，薄膜的紫外线透过率可以根据碳点的含量进行微调，并且可以很容易地从纸张上去除而不留下残留物。人工加速紫外线老化实验表明，受保护的竹纸和宣纸的酸化、氧化和光裂解过程减缓。这项研究为利用新兴碳材料保护纸张及纸质文物和艺术品开辟了新方向，可根据特定的保存和展览要求提供可定制的保护效果。这项研究开创了一种利用新兴碳点材料对纸张及纸质文物进行预防性保护的新方法，可为不同的保存需求提供量身定制的保护。
