文献类型：期刊文献

中文题名：自然老化对古建筑木材细胞壁结构与成分的影响

英文题名：Effects of Natural Aging on the Cell Wall Structure and Chemical Composition of Ancient Architectural Wood

作者：陈凯强[1] 龙克莹[1] 初石民[1] 林兰英[1] 陈勇平[1] 张涛[2]

第一作者：陈凯强

机构：[1]中国林业科学研究院木材工业研究所,北京100091;[2]北京市考古研究院,北京100085

年份：2023

卷号：37

期号：5

起止页码：30-37

中文期刊名：木材科学与技术

外文期刊名：Chinese Journal of Wood Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；

基金：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);“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)。

语种：中文

中文关键词：古建筑木材;自然老化;微观构造;细胞壁结构;化学成分

外文关键词：ancient architectural wood;natural aging;microstructure;cell wall structure;chemical composition

分类号：S781.1;S791.22;TU366.2

摘要：探究古建筑木材微观结构和化学成分的变化,有助于揭示自然老化作用下木材性质的演变机制和劣化机理。以古建和现代落叶松(Larix sp.)木材为研究对象,通过对两者微观构造、孔隙率、纤维素结晶度和化学成分进行测试,探究自然老化作用下古建材性质的变化。结果表明,古建材微观构造上存在显著的劣化特征,其中早材比晚材的劣化程度更严重;古建材孔隙的孔体积和孔径均显著大于对照材,古建材中大部分孔隙孔径在10 nm以上,而对照材中孔径10 nm以下的孔隙占比最高。古建材纤维素结晶度比对照材升高13.61%;傅里叶变换红外光谱显示古建材中木质素、半纤维素出现了一定程度的降解,峰强度比结果显示纤维素结晶区未发生明显变化,而纤维素无定形区发生了降解。基于微观结构和化学成分的变化,提出木材细胞壁化学成分的劣化模型,为自然老化作用下木材的劣化机理研究提供参考依据。
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.