Study on the hygroscopicity and kinetic and thermodynamic properties of ancient Tibetan Palm Leaf Manuscripts

IF 7.5 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj Materials Degradation Pub Date : 2025-08-23 DOI:10.1038/s40494-025-01988-1

Wenjie Zhang, Shan Wang, Liuyang Han, Hong Guo

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引用次数: 1

Abstract

This study examines how natural aging affects the hygroscopic, kinetic, and thermodynamic properties of ancient Tibetan Palm Leaf Manuscripts. The results show aging increases equilibrium moisture content and hygroscopicity, with a noticeable hysteresis effect, suggesting enhanced moisture stability at low to moderate humidity. The GAB and H-H models indicate aging accelerates cellulose degradation, adds adsorption sites, and promotes physical adsorption. Kinetic studies reveal a faster moisture absorption and release rate with aging, especially under varying humidity. Thermodynamic analysis shows that as moisture content rises, the adsorption and desorption processes become more spontaneous. Infrared spectral analysis confirms significant degradation of cellulose and hemicellulose, increasing hydroxyl groups and hygroscopicity. The study suggests that these manuscripts are best preserved in a controlled environment with moderate humidity (50-60% RH) and cooler temperatures to maintain moisture stability and flexibility while preventing damage from excessive fluctuations.

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古藏棕榈叶手稿的吸湿性及动力学和热力学性质研究

本研究探讨自然老化如何影响古藏棕榈叶手稿的吸湿性、动力学和热力学性质。结果表明，陈化提高了平衡含水率和吸湿性，并有明显的滞后效应，表明在低、中湿度条件下水分稳定性增强。GAB和H-H模型表明，老化加速了纤维素的降解，增加了吸附位点，促进了物理吸附。动力学研究表明，随着老化，特别是在变湿度条件下，其吸湿释放速度更快。热力学分析表明，随着水分含量的增加，吸附和解吸过程变得更加自发。红外光谱分析证实纤维素和半纤维素的显著降解，增加羟基和吸湿性。研究表明，这些手稿最好保存在湿度适中（50-60%相对湿度）和温度较低的受控环境中，以保持水分稳定性和灵活性，同时防止过度波动造成损害。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.80

自引率

7.80%

发文量

审稿时长

6 weeks

期刊介绍： npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies