相关实验视频
Updated: Sep 15, 2025

08:08
Fabrication and Design of Wood-Based High-Performance Composites
Published on: November 9, 2019
13.5K
通过粉修饰纤维素增强快速生长的木材特性:优越的疏水性和尺寸稳定性
Jinjiang Ma1, Penghao Sun1, Fuhao Dong2
1Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
International journal of biological macromolecules
|July 13, 2025
概括
一种新型的基疏水剂 (SRA) 增强了快速生长的木材特性. 这种生物质衍生处理显著减少了水的吸收,并提高了机械强度,扩大了木材的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 生物质利用生物质的利用
- 木材修饰木材修饰的方法
背景情况:
- 快速生长的木材的基组导致吸水,降低机械性能和限制应用.
- 现有的木材处理方法在解决湿度敏感性和增强结构完整性方面往往不足.
研究的目的:
- 从生物质中合成一种基基疏水剂 (SRA).
- 评估SRA在提高快速生长木材的耐水性,尺寸稳定性和机械性能方面的有效性.
主要方法:
- 通过四水酸 (TRA) 和 (3-glycidyloxypropyl) triethoxysilane (KH-561) 之间的环开反应合成SRA.
- 将SRA应用于快速生长的木材,利用与纤维素基团的共价键.
- 评估了吸水率,水接触角度,抗膨胀效率和轴向拉伸强度.
主要成果:
- 在水浸浸12天后,SRA将木材的吸水率从112%降低到34%.
- 水接触角度从100°增加到127°,表明增强的疏水性.
- 抗膨胀效率达到52%,轴向拉伸强度从43MPa增加到大约65MPa.
结论:
- 合成的SRA有效地提高了快速生长的木材的疏水性和机械性能.
- 来自生物质的SRA提供了一种可持续的解决方案,用于增强木材的特性并扩大其应用范围.
- 联结合和孔隙填充机制有助于木材稳定性和强度的改善.
更多相关视频
相关概念视频
Wood Surfacing
146
Wood surfacing is a critical finishing process designed to smoothen the wood surface, enhance its dimensional accuracy, and make handling safer. This process compensates for potential shrinkage during the seasoning phase by marginally increasing the wood dimensions before surfacing. It also helps correct some distortions that may occur as the wood dries.
The equipment used in the surfacing process is a plane equipped with rotating blades. This tool efficiently smoothens the wood surface and can...
The equipment used in the surfacing process is a plane equipped with rotating blades. This tool efficiently smoothens the wood surface and can...
146
Wood Products
131
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...
131
Softwoods and Hardwoods
251
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,...
251
Cellulose and Pectic Polysaccharides
3.9K
Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...
As a cell matures, its cell wall specializes according to its type. For example, the...
3.9K

