Laboratoire PIMM, Arts et Métiers Institute of Technology, CNRS, CNAM, HESAM Université, 151 boulevard de l'Hopital, 75013 Paris, France; ANDRA, French National Radioactive Waste Management Agency, F-92298 Châtenay-Malabry, France; Centre de Recherche sur la Conservation des Collections (CRC, CNRS UAR 3224), Muséum National d'Histoire Naturelle, 36 rue Geoffroy St Hilaire, 75005 Paris, France.
Laboratoire PIMM, Arts et Métiers Institute of Technology, CNRS, CNAM, HESAM Université, 151 boulevard de l'Hopital, 75013 Paris, France.
Carbohydr Polym. 2023 Jun 15;310:120727. doi: 10.1016/j.carbpol.2023.120727. Epub 2023 Feb 21.
In order to investigate a synergetic role of water and oxygen in the degradation of permanent paper in archiving climate, accelerated ageing in three different conditions was conducted: humid air, humid nitrogen and dry air. This allowed to decouple acid-catalysed hydrolysis versus oxidation of cellulose. After ensuring the reliability of the ageing experiment, the degradation state of the paper was assessed. Various techniques (size exclusion chromatography, pH extraction, alkaline reserve, paper colour and water content) were used. It appeared that the cellulose scission rate of the Canson® permanent paper was reduced compared to the Whatman No. 40 acidic cotton paper used as reference, but not in the same proportion for all the ageing conditions. This was attributed to a lower acidification, inhibiting acid-catalysed hydrolysis, due to the presence of the alkaline reserve. The degradation mechanisms are the same for both papers, which exhibited a similar chemical and physical degradation.
为了探究水和氧气在归档环境中永久性纸张降解过程中的协同作用，在三种不同条件下进行了加速老化：湿空气、湿氮气和干燥空气。这使得可以分离纤维素的酸催化水解与氧化。在确保老化实验的可靠性之后，评估了纸张的降解状态。使用了各种技术（尺寸排阻色谱法、pH 值提取、碱性储备、纸张颜色和含水量）。结果表明，与用作参考的 Canson®永久性纸张相比，Canson®永久性纸张的纤维素断裂率降低，但并非在所有老化条件下的降低比例都相同。这归因于碱性储备的存在导致酸化程度降低，从而抑制了酸催化水解。两种纸张的降解机制相同，均表现出相似的化学和物理降解。
