从木材聚合物中产生的挥发性有机化合物在松树木的热负荷下产生
Katarína Trojanová1, Veronika Veľková2, František Kačík1
1Department of Chemistry and Chemical Technology, Faculty of Wood Sciences and Technology, Technical University in Zvolen, 96001 Zvolen, Slovakia.
Polymers
|April 12, 2025
概括
木材处理在热降解过程中显著改变挥发性有机化合物 (VOC) 的形成. 与未经处理的木材相比,阻燃和热处理减少了有毒的挥发性有机物,影响了消防安全评估.
科学领域:
- 木材化学 木材化学
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 木材聚合物 (纤维素,半纤维素,素) 的热降解产生挥发性产品,有些有毒或刺激.
- 了解这些挥发性产品对于评估木材燃烧安全性和毒性至关重要.
研究的目的:
- 研究木材处理对热降解过程中挥发性产品的形成的影响.
- 为了比较未经处理,经阻燃处理和经热处理的杉木中的挥发性有机化合物 (VOC).
主要方法:
- 松木样本 (未经处理,阻燃处理,热处理) 在150°C,200°C和250°C的温度下受到热负荷.
- 降解产品采集并使用气色谱-质谱法 (GC-MS) 进行分析.
主要成果:
- 木材处理类型和热负荷温度显著影响了VOC的形成.
- 较高的温度 (250°C) 导致VOC度和数量显著增加.
- 未经处理的木材产生了最多的VOC (54种化合物),用阻燃剂处理的木材产生了更少的VOC (9种化合物),热处理的木材产生了最少的VOC (3种化合物).
结论:
- 木材处理明显减少了热降解过程中释放的挥发性有机化合物的数量和数量.
- 阻燃和热处理提供了一个潜在的策略,以减轻燃烧木材释放的有毒挥发性物质的释放.
相关概念视频
Seasoning of Wood
73
Seasoning of wood is a crucial process aimed at reducing and stabilizing the moisture content within the wood to prevent future shrinkage, structural damage, or aesthetic issues once the wood is used in construction. Wood naturally swells when it absorbs moisture and contracts as it dries.
Achieving equilibrium moisture content is the goal of seasoning; this is the point where the wood's moisture content stabilizes to align with the moisture levels of the surrounding environment. Proper...
Achieving equilibrium moisture content is the goal of seasoning; this is the point where the wood's moisture content stabilizes to align with the moisture levels of the surrounding environment. Proper...
73
Softwoods and Hardwoods
124
Softwoods and hardwoods, derived from different types of trees, are distinguished by their leaf structures and cellular compositions, each serving unique purposes in construction and manufacturing. Softwoods come from cone-bearing trees with needle-like leaves and are predominantly composed of longitudinal cells called tracheids and a smaller proportion of radial cells known as rays. Due to their cellular structure, softwoods are commonly used in construction for structural frames, sheathing,...
124
Wood Products
68
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
68
Organic Compounds
50.8K
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
50.8K


