| Popis: |
In order to investigate the nature of the change of wood properties, to understand and master the deterioration mechanism of wood properties, this paper takes the wooden components replaced during the renovation of the Guhuaxuan in the Imperial Palace as the research object, nondestructive testing technology, chemical composition analysis and electron microscope scanning(SEM) analysis were adopted to study the changes of the chemical composition and microstructure of the wooden components, so as to establish the correlation between the macroscopic performance of wood and its chemical composition and microstructure. The results showed that cellulose, hemicellulose and lignin degraded to a certain extent after the wood was used for a period of time under the influence of visible light, temperature and water, and the components and degrees of degradation were different at different locations. The correlation between heterocellulose, α-cellulose, lignin and wood component density and modulus of elasticity (Ed) are good, and the order was α-cellulose > heterocellulose > lignin. The density and crystallinity of wood components are positively correlated with Ed. |
