三个实木的物理和水吸附特征的变化,在一侧表面化后发生变化
Carolina Tenorio1, Roger Moya1, Lidier Tencio1
1Escuela de Ingeniería Forestal, Instituto Tecnológico de Costa Rica, Apartado 159-7050, Cartago, Costa Rica.
ACS omega
|July 8, 2024
概括
木材的表面燃烧会减少吸收水分,提高耐用性. 较高的烧焦温度 (400°C) 与较低的温度 (300°C) 相比,导致更大的密度损失和表面缺陷.
科学领域:
- 材料科学 材料科学 材料科学
- 木材科学 木材科学 木材科学
- 表面工程是什么?表面工程是什么?
背景情况:
- 一面表面烧焦是一种木材修饰技术.
- 它旨在减少吸收水分,提高对生物降解的抵抗力.
- 这一过程对于创建持久的外部木材板非常有价值.
研究的目的:
- 为了评估单面表面烧焦对木材性能的影响.
- 研究不同烧焦温度对木材密度,表面质量和吸附特性的影响.
- 为了比较三个快速生长的种植园木材物种的性能:Cupressus lusitanica,Gmelina arborea和Tectona grandis.
主要方法:
- 在Cupressus lusitanica,Gmelina arborea和Tectona grandis的木材样本的一侧使用热板在300,350和400°C下燃烧了10分钟.
- 评估的属性包括木材密度,表面质量 (颜色,裂纹) 和吸附特性 (湿度,吸水率).
- 与未经处理的参考样本进行了比较.
主要成果:
- 300°C的炭化导致的密度和厚度损失小于400°C.
- 高温 (400°C) 降低了所有物种的所有颜色参数 (L*,a*,b*).
- 像裂和脱落等表面缺陷在350°C和400°C时更频繁.
- 单面烧焦减少了液体水的吸收,特别是对于Cupressus lusitanica和Tectona grandis.
- 与其他物种相比,Gmelina arborea表现出更快的烧焦,更大的密度损失和更高的水分吸收.
结论:
- 一面表面烧焦有效地减少了木材的液体水吸附.
- 较低的烧焦温度 (300°C) 是最好的,以尽量减少密度损失和表面缺陷.
- 对于优化应用,应考虑物种特异性对烧焦的反应,例如Gmelina arborea更快的烧焦率.
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