木材科学与技术2023，Vol.37Issue(5)：30-37,8.DOI:10.12326/j.2096-9694.2023041
自然老化对古建筑木材细胞壁结构与成分的影响
Effects of Natural Aging on the Cell Wall Structure and Chemical Composition of Ancient Architectural Wood
摘要
Abstract
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.关键词
古建筑木材/自然老化/微观构造/细胞壁结构/化学成分Key words
ancient architectural wood/natural aging/microstructure/cell wall structure/chemical composition分类
农业科技引用本文复制引用
陈凯强,龙克莹,初石民,林兰英,陈勇平,张涛..自然老化对古建筑木材细胞壁结构与成分的影响[J].木材科学与技术,2023,37(5):30-37,8.基金项目
中央级公益性科研院所基本科研业务费专项资金"刺入式探测对木柱承载能力的影响机制"(CAFYBB2019SY033) （CAFYBB2019SY033）
"十三五"国家重点研发计划课题"明清官式建筑材料科学化认知研究"(2020YFC1522402). （2020YFC1522402）
