The Degradation Mechanism Induced by Synergistic Salt Accumulation and Acid Hydrolysis on the Ancient Wood of Feiyun Pavilion

Le résumé fourni par la source

The research on the wood of Feiyun Pavilion is crucial for preserving ancient architecture. However, the microstructural evolution mechanisms are not fully understood and thus require deeper exploration. To address this knowledge gap, this study reveals the degradation mechanism of wood samples using a diverse array of analytical techniques, including scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), elemental analysis (EA), pH measurement, Fourier transform infrared spectroscopy (FTIR), and nanoindentation (NI). The results show substantial salt crystallization in the samples, with calcium salts predominantly composed of gypsum (CaSO4·2H2O). Meanwhile, the pH levels of aged samples also notably dropped, indicating acidification of the wood. These phenomena can be attributed to environmental factors like acid rain and air pollution. Specifically, the distinctive damage mechanism of Feiyun Pavilion’s wooden structures involves the hydrolysis of hydrocarbons due to wood acidification and cell wall damage from salt crystallization. These two processes synergistically contribute to the progressive degradation of the wood’s mechanical properties. Ultimately, this study aims to enhance our theoretical understanding of damage phenomena on wood surfaces and provide valuable insights for the conservation and restoration of culturally significant wooden architecture.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.