光热作用对光敏文物材料的损伤影响分析

Analysis of the Effects of Photothermal Action on the Damage of Photosensitive Cultural Relic Materials

博物馆展陈照明过程中,光源光谱中红外光产生的光热作用不仅对光敏文物材料产生直接损伤,同时还将催化文物的光化学反应,而在损伤过程中二者的主导作用尚不可知。文章通过制备常见的光敏感文物材料样品,利用电加热台模拟红外光直接热损伤,同时利用卤钨灯及低蓝光含量的LED进行对比光照老化实验,利用色差量化样品老化情况。研究结果表明,光辐照过程中,对文物损伤的主导作用是由催化加速文物的光化学反应所致。该研究获得了文物在辐照过程中的光热损伤机理,对文物保护性照明具有重要意义。

In the process of museum exhibition lighting, the light-thermal effect caused by IR in the light source spectrum can not only directly damage the light-sensitive cultural relics, but also accelerate the photochemistry reaction by heating effect. However, the dominant role of the two ways in the process of injury is unknown. In this study, common light-sensitive cultural relics were prepared, and infrared direct thermal damage was simulated by heating with electric heating station. Meanwhile, halogen tungsten lamp and LED with low blue content were used to carry out comparative light aging experiments, and color difference was used to quantify the aging of samples. The results show that the dominant effect of photo-thermal effect on the damage of cultural relics is due to the photochemistry reaction accelerated by photo-catalysis. The photo-thermal damage mechanism of cultural relics in irradiation process is obtained, which is of great significance to the protective lighting of cultural relics.