{"title":"微观结构对鼻足、铁合欢木材透气性和吸附性的影响","authors":"G. A. Quartey, J. Eshun, Bernard Sakyiama","doi":"10.31357/ait.v1i3.5341","DOIUrl":null,"url":null,"abstract":"This paper sets to find out the effect of the microstructure of wood on the permeability and sorption of the wood of Sterculia rhinopetala and Albizia ferruginea. Permeability, the way of ingress of water into wood mass, is one of the most variable properties of timber and it further influences nearly all the physical properties of wood. Wood exposed to high humidity conditions or to liquid water during use may be subjected to biological deterioration which makes equilibrium moisture content of wood very important. Equilibrium moisture content is the moisture level where the wood neither gains nor loses moisture since it is at equilibrium with the relative humidity and temperature of the surrounding environment. Sixteen randomly sampled specimens of each of the wood of Sterculia rhinopetala and Albizia ferruginea species (heartwood and sapwood) with dimensions 3 cm x 3 cm x 3 cm were exposed at various relative humidity conditions of 30 %, 45 %, 60 %, 75 % and 90 % in a temperature and humidity-controlled climate chamber. The order of water uptake in terms of percentage volume is arranged from the lowest to the highest. Sterculia rhinopetala heartwood had the lowest uptake per volume with a value of 0.31 %. On the uptake per weight Sterculia rhinopetala heartwood again had the lowest uptake whilst Albizia ferruginea had the highest with a value of 6.77 %. The sapwood of Sterculia rhinopetala had a relatively higher uptake per volume value of 0.53 % and a value of uptake per weight of 0.72 % compared to the heartwood. The equilibrium moisture content values of Sterculia rhinopetala suggests that it can have minimal dimensional changes when used in both the Southern and the Northern parts of Ghana.\n ","PeriodicalId":52314,"journal":{"name":"Advances in Technology Innovation","volume":"29 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Effect of Microstructure on the Permeability and Sorption of Wood of Sterculia rhinopetala and Albizia ferruginea\",\"authors\":\"G. A. Quartey, J. Eshun, Bernard Sakyiama\",\"doi\":\"10.31357/ait.v1i3.5341\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper sets to find out the effect of the microstructure of wood on the permeability and sorption of the wood of Sterculia rhinopetala and Albizia ferruginea. Permeability, the way of ingress of water into wood mass, is one of the most variable properties of timber and it further influences nearly all the physical properties of wood. Wood exposed to high humidity conditions or to liquid water during use may be subjected to biological deterioration which makes equilibrium moisture content of wood very important. Equilibrium moisture content is the moisture level where the wood neither gains nor loses moisture since it is at equilibrium with the relative humidity and temperature of the surrounding environment. Sixteen randomly sampled specimens of each of the wood of Sterculia rhinopetala and Albizia ferruginea species (heartwood and sapwood) with dimensions 3 cm x 3 cm x 3 cm were exposed at various relative humidity conditions of 30 %, 45 %, 60 %, 75 % and 90 % in a temperature and humidity-controlled climate chamber. The order of water uptake in terms of percentage volume is arranged from the lowest to the highest. Sterculia rhinopetala heartwood had the lowest uptake per volume with a value of 0.31 %. On the uptake per weight Sterculia rhinopetala heartwood again had the lowest uptake whilst Albizia ferruginea had the highest with a value of 6.77 %. The sapwood of Sterculia rhinopetala had a relatively higher uptake per volume value of 0.53 % and a value of uptake per weight of 0.72 % compared to the heartwood. 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引用次数: 1
摘要
本文旨在研究木材的微观结构对鼻足木和铁杉木材透气性和吸附性的影响。透气性,即水分进入木材的方式,是木材最多变的特性之一,它进一步影响木材的几乎所有物理特性。木材在使用过程中暴露在高湿度条件下或液态水中可能会发生生物变质,这使得木材的平衡水分含量非常重要。平衡水分含量是木材既不获得也不失去水分的水分水平,因为它与周围环境的相对湿度和温度处于平衡状态。在温度和湿度控制的气候室中,随机抽取16个尺寸为3 cm x 3 cm x 3 cm x 3 cm的Sterculia rhinopetala和Albizia ferruginea两种木材(心材和边材)标本,分别在30%、45%、60%、75%和90%的相对湿度条件下暴露。吸水率的大小顺序由低到高。小檗心材的单位体积吸收量最低,为0.31%。在每重吸收量上,鹿皮心材的吸收量最低,铁杉的吸收量最高,达6.77%。与心材相比,边材的每体积吸收量为0.53%,每重量吸收量为0.72%。犀牛角的平衡水分含量值表明,当在加纳南部和北部使用时,它可以有最小的尺寸变化。
Effect of Microstructure on the Permeability and Sorption of Wood of Sterculia rhinopetala and Albizia ferruginea
This paper sets to find out the effect of the microstructure of wood on the permeability and sorption of the wood of Sterculia rhinopetala and Albizia ferruginea. Permeability, the way of ingress of water into wood mass, is one of the most variable properties of timber and it further influences nearly all the physical properties of wood. Wood exposed to high humidity conditions or to liquid water during use may be subjected to biological deterioration which makes equilibrium moisture content of wood very important. Equilibrium moisture content is the moisture level where the wood neither gains nor loses moisture since it is at equilibrium with the relative humidity and temperature of the surrounding environment. Sixteen randomly sampled specimens of each of the wood of Sterculia rhinopetala and Albizia ferruginea species (heartwood and sapwood) with dimensions 3 cm x 3 cm x 3 cm were exposed at various relative humidity conditions of 30 %, 45 %, 60 %, 75 % and 90 % in a temperature and humidity-controlled climate chamber. The order of water uptake in terms of percentage volume is arranged from the lowest to the highest. Sterculia rhinopetala heartwood had the lowest uptake per volume with a value of 0.31 %. On the uptake per weight Sterculia rhinopetala heartwood again had the lowest uptake whilst Albizia ferruginea had the highest with a value of 6.77 %. The sapwood of Sterculia rhinopetala had a relatively higher uptake per volume value of 0.53 % and a value of uptake per weight of 0.72 % compared to the heartwood. The equilibrium moisture content values of Sterculia rhinopetala suggests that it can have minimal dimensional changes when used in both the Southern and the Northern parts of Ghana.