自然老化作用对杨木热行为特征影响试验研究*

doi:10.16265/j.cnki.issn 1003-3033.2021.12.003

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (12): 17-23.doi: 10.16265/j.cnki.issn 1003-3033.2021.12.003

自然老化作用对杨木热行为特征影响试验研究^*

邓军教授, 刘同双, 宋佳佳, 赵靖昱副教授, 王彩萍副教授, 赵彦丽讲师

西安科技大学安全科学与工程学院,陕西西安 710054

收稿日期:2021-09-20 修回日期:2021-11-17 出版日期:2021-12-28 发布日期:2022-06-28
作者简介:邓军 (1970—),男,四川大竹人,博士,教授,博士生导师,主要从事火灾的机制、预测及防治技术研究。E-mail:dengj518@xust.edu.cn。
基金资助:
陕西省教育厅专项科研计划项目(20JK0769)。

Experimental study on effect of natural aging on poplars' thermal behavior characteristics

DENG Jun, LIU Tongshuang, SONG Jiajia, ZHAO Jingyu, WANG Caiping, ZHAO Yanli

College of Safety Science and Engineering, Xi'an University Science and Technology, Xi'an Shaanxi 710054, China

Received:2021-09-20 Revised:2021-11-17 Online:2021-12-28 Published:2022-06-28

摘要/Abstract

摘要： 为了探究自然老化作用对杨木热行为特征的影响,选取不同自然老化程度的杨木,分别采用扫描电镜(SEM)和傅里叶红外光谱试验(FTIR)测试杨木样品的表观形貌及微观结构,同时采用差示扫描量热(DSC)试验研究杨木的热行为特征。试验显示,经过自然老化后的杨木表面会产生大量参差不齐的断口,同时内部孔隙直径也会增加;羟基、羰基以及醚键等活性基团含量随自然老化程度的加深而逐渐降低;随着自然老化作用的加深,杨木样品的DSC热流曲线向低温区域偏移。结果表明:自然老化作用改变了杨木内部的孔隙结构及活性基团含量,使杨木样品更容易发生热解反应。

关键词: 自然老化, 杨木, 热行为, 活性基团, 热流曲线

Abstract: In order to explore influence of natural aging on thermal behavior characteristics of poplar wood, poplars with different natural aging rank were selected, and their apparent morphology and microstructure were tested by using scanning electron microscope (SEM) and Fourier infrared spectroscopy (FTIR), respectively. In addition, their thermal behavior characteristics were studied through differential scanning calorimeter (DSC). The test indicated that their surface produced a large number of uneven fractures after natural aging, and diameter of internal pores could also increase. The content of active groups such as hydroxyl group, carbonyl group and ether bond decreased gradually as degree of natural aging deepened, while DSC heat flow curve shifted to low temperature region. The results show that natural aging changes the internal pore structure and active group content of poplar wood, causing the samples to be pyrolyzed more easily.

Key words: natural aging, poplar, thermal behavior, active group, heat flow curve

中图分类号:

X932

邓军, 刘同双, 宋佳佳, 赵靖昱, 王彩萍, 赵彦丽. 自然老化作用对杨木热行为特征影响试验研究^*[J]. 中国安全科学学报, 2021, 31(12): 17-23.

DENG Jun, LIU Tongshuang, SONG Jiajia, ZHAO Jingyu, WANG Caiping, ZHAO Yanli. Experimental study on effect of natural aging on poplars' thermal behavior characteristics[J]. China Safety Science Journal, 2021, 31(12): 17-23.

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自然老化作用对杨木热行为特征影响试验研究^*

Experimental study on effect of natural aging on poplars' thermal behavior characteristics

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