Initial Desorption of Reaction Beech Wood

IF 0.7 4区 农林科学 Q4 MATERIALS SCIENCE, PAPER & WOOD Drvna Industrija Pub Date : 2022-07-15 DOI:10.5552/drvind.2022.0021
J. Majka, M. Sydor, Jakub Prentki, M. Zborowska
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引用次数: 2

Abstract

The research aimed to obtain empirical data for modeling the initial desorption in reaction wood from the cross-section of the green beech (Fagus sylvatica L.) log. Firstly, we analyzed the chemical composition, macro and microscopic structure of tension and opposite wood tissue. Then, the Equilibrium Moisture Content (EMC) was measured by the Dynamic Vapor Sorption method during the initial desorption. The used air parameters were specific for the mild drying schedule of green beech timber (t = 20, 35, and 50 °C, Relative Humidity (RH) ranging from 95 to 0 %). Relationships between the EMC of reaction wood and drying parameters were modeled using the Response Surface Method (RSM). The tests revealed: different hygroscopic properties of tension and opposite wood, the dependence of EMC value on temperature, and differences between EMC values for initial (first) and second desorption. Moreover, it was confirmed that, during initial desorption, the EMCs of reaction wood are significantly higher than reference EMC data. The differences in the EMC value are up to 0.14 kg/kg (for air with RH above 90 %). The presented polynomial model of the initial desorption of reaction beech wood can improve drying schedules for beech sawn timber with a high amount of reaction tissue.
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反应山毛榉木材的初始解吸
本研究旨在从绿山毛榉(Fagus sylvatica L.)原木的横截面上获取模拟反应木材初始解吸的经验数据。首先,我们分析了木材组织的化学成分、宏观和微观结构。然后用动态水蒸气吸附法测定了初始解吸过程中的平衡含水率(EMC)。所使用的空气参数是针对绿色山毛榉木材的温和干燥时间表(t = 20、35和50°C,相对湿度(RH)范围为95%至0%)。利用响应面法(Response Surface Method, RSM)建立了反应木材的电磁兼容性与干燥参数之间的关系。试验结果表明:拉伸木材和相对木材的吸湿性能不同,EMC值与温度的关系,以及第一次和第二次脱附时EMC值的差异。此外,还证实了在初始解吸过程中,反应木材的EMC显著高于参考EMC数据。(相对湿度90%以上)电磁兼容性差值可达0.14 kg/kg。所建立的反应山毛榉木材初始解吸的多项式模型可以改善反应组织较多的山毛榉锯材的干燥进度。
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来源期刊
Drvna Industrija
Drvna Industrija MATERIALS SCIENCE, PAPER & WOOD-
CiteScore
1.80
自引率
9.10%
发文量
32
审稿时长
>12 weeks
期刊介绍: "Drvna industrija" ("Wood Industry") journal publishes original scientific and review papers, short notes, professional papers, conference papers, reports, professional information, bibliographical and survey articles and general notes relating to the forestry exploitation, biology, chemistry, physics and technology of wood, pulp and paper and wood components, including production, management and marketing aspects in the woodworking industry.
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