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Natural Weathering of Sixteen Wood Species: Changes on Surface Properties
Polymer Degradation and Stability ( IF 5.9 ) Pub Date : 2020-10-27 , DOI: 10.1016/j.polymdegradstab.2020.109415
Sebnem S. Arpaci , Eylem D. Tomak , Mahmut A. Ermeydan , Ibrahim Yildirim

In this study, natural weathering behavior of sixteen different wood species was investigated under the same conditions in order to clarify the resistance against outdoor degrading agents regarding wood color, gloss, surface roughness and surface chemistry. For this purpose, American walnut, ash, cherry, oak, maple, teak, mazel, beli, limba, anigre, tulip, sapele, walnut, eucalyptus, beech and pine samples were exposed to weathering agents on above ground test equipment for a year in Bursa, Turkey, and 36 periodic measurements were carried out from the surfaces during the exposure period. The results showed that the darkest and the greatest color change were found on the surfaces of pine, maple and tulip samples while the least color change was observed on walnut, A. walnut and oak samples. The surface roughness, crack formations and degradation of surface components increased with the increase in exposure period. Gloss property had a tendency to increase on some species such as teak, sapele, walnut, A. walnut, limba and beli while the others lost the gloss, and had a paler surface than the initial stage. In accordance with the color and roughness measurements, FTIR spectra proved that lignin degradation continued on the exposed surfaces during 3 months of natural weathering for all species. Correlation analysis showed that wood species with high density had more stability against color changes. However the roughness and gloss showed nonsignificant correlation between density of samples.



中文翻译:

16种木材的自然风化:表面性质的变化

在这项研究中,研究了16种不同木材在相同条件下的自然风化行为,以阐明其在木材颜色,光泽,表面粗糙度和表面化学方面对室外降解剂的抵抗力。为此,将美国核桃,白蜡木,樱桃,橡木,枫木,柚木,马泽尔,贝利,林加,阿尼格雷,郁金香,沙比利,核桃,桉树,山毛榉和松树样品在地上测试设备上暴露于风化剂中一年。在土耳其布尔萨(Bursa),在暴露期间对表面进行了36次定期测量。结果表明,在松树,枫树和郁金香样品的表面发现最深和最大的颜色变化,而在胡桃木,胡桃木和橡木样品上观察到的颜色变化最小。表面粗糙度 裂纹的形成和表面成分的降解随着暴露时间的增加而增加。某些种类的柚木,沙比利,胡桃,A。胡桃木,肢体和贝利的光泽度有增加的趋势,而其他种类则失去光泽,并且表面比起初更白。根据颜色和粗糙度测量结果,FTIR光谱证明,在所有物种自然风化的3个月中,木质素在暴露的表面上继续降解。相关分析表明,高密度木材对颜色变化具有更大的稳定性。但是,粗糙度和光泽度显示样品密度之间无显着相关性。肢体和贝利,而其他则失去光泽,并且表面比开始阶段要浅。根据颜色和粗糙度测量结果,FTIR光谱证明,在所有物种自然风化的3个月中,木质素在暴露的表面上继续降解。相关分析表明,高密度木材对颜色变化具有更大的稳定性。但是,粗糙度和光泽度显示样品密度之间无显着相关性。肢体和贝利,而其他则失去光泽,并且表面比开始阶段要浅。根据颜色和粗糙度测量结果,FTIR光谱证明,在所有物种自然风化的3个月中,木质素在暴露的表面上继续降解。相关分析表明,高密度木材对颜色变化具有更大的稳定性。但是,粗糙度和光泽度显示样品密度之间无显着相关性。相关分析表明,高密度木材对颜色变化具有更大的稳定性。但是,粗糙度和光泽度显示样品密度之间无显着相关性。相关分析表明,高密度木材对颜色变化具有更大的稳定性。但是,粗糙度和光泽度显示样品密度之间无显着相关性。

更新日期:2020-10-29
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