Effects of Natural Aging on the Cell Wall Structure and Chemical Composition of Ancient Architectural Wood
The study explored the changes in the microstructure and chemical composition of ancient architectural wood to reveal the evolution and degradation mechanisms of wood properties under natural aging.Ancient and recent larch(Larix sp.)were used as research objects.The microstructure,porosity,cellulose crystallinity,and chemical composition of both the ancient and recent wood samples were tested to investigate the changes in the properties of ancient architectural wood under natural aging.Compared with recent wood,the results indicated that the ancient architectural wood exhibited significant signs of deterioration in the microstructure,with the earlywood having more severe deterioration than the latewood.The pore volume and pore size of the ancient architectural wood were significantly larger than those of the recent wood.Most of the pore sizes in ancient building materials were above 10 nm,while the proportion of pores less than 10 nm was the largest in the control material.The cellulose crystallinity of ancient architectural wood was 13.61%higher than that of the recent wood.Fourier transform infrared spectroscopy showed a certain degree of degradation of lignin and hemicellulose in the ancient architectural wood.From the results of the peak intensity ratio,no significant change was observed in the crystalline region of cellulose in the ancient architectural wood.In contrast,the amorphous region of cellulose had degradation.Based on the changes in microstructure and chemical composition,a degradation model was proposed for the chemical compositions of wood cell walls of ancient architectural wood,providing a reference for future study of the degradation mechanism of wood under natural aging.
ancient architectural woodnatural agingmicrostructurecell wall structurechemical composition
国家科技期刊平台
NSTL
万方数据
维普
