期刊论文

Effects of high temperature drying on the hygroscopicity and dimensional stability of Chinese Fir

中文

安徽农业大学学报

1672-352X

2020

47

5

730-737

10.13610/j.cnki.1672-352x.20201113.010

“十三五”国家重点研发计划“木材节能备料与质量控制技术研究”（2016YFD0600701）资助；

本校为第一机构

为明确不同干燥方法对人工林杉木吸湿及尺寸稳定性的影响,以40 mm杉木锯材为研究对象,通过高温干燥、常规干燥和气干3种方法进行干燥处理,采用双室温、湿度控制法和GAB等温吸附模型拟合系统研究了干燥方法对平衡含水率、尺寸稳定性、等温吸附线型等的影响规律,并采用低温核磁共振分析测定不同干燥方法试样的细胞壁最大吸着水含量。结果表明:相较于气干及常规干燥,高温干燥可较为显著的降低试样吸湿平衡含水率及弦向线性湿胀率;不同干燥方法试样的等温吸附曲线均可由GAB模型拟合,拟合度均高于0.91,且呈现第二类等温吸附曲线特征;高温干燥试样细胞壁吸着水最大含量明显低于气干和常规干燥材,与高温...

In order to clarify the effects of different drying methods on the moisture adsorption and dimensional stability of planted Chinese fir, drying of 40mm thickness Chinese fir timber was taken as the research object, three kinds of drying methods including air drying, conventional drying and high temperature drying were carried out. After different drying methods, the sorption experiments of different drying methods samples were performed in the two-chamber setup and the sorption isotherms curves were fitted by Guggenheim-Anderson-deBoer(GAB) equation. The effects of different drying methods on ...