以水为基础的超声波预处理增强了莫索竹的尺寸稳定性和防抗性
Jing Qian1, Pengfei Xia2, Shixia Cui2
1Engineering Center for Bamboo-Based Plastic Substitution, Lab of Wood Quality Improvement & High Efficient Utilization, School of Materials and Chemistry, Anhui Agricultural University, Hefei 230036 Anhui, China; Faculty of Forestry, University of British Columbia, Vancouver, BC, Canada.
Ultrasonics sonochemistry
|October 16, 2025
概括
超声波预处理增强了moso竹子.
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
- 生物材料工程 生物材料工程
背景情况:
- 莫索竹 (Phyllostachys edulis) 由于易受菌和尺寸不稳定,因此耐用性较差.
- 这些限制限制了竹子在潮湿环境中的应用.
- 开发有效,环保的治疗方法对于扩大竹子的利用至关重要.
研究的目的:
- 为了研究基于水的超声波预处理对莫索竹的微观结构,物理化学性质,尺寸稳定性和耐菌性的影响.
- 评估超声波处理作为竹子修饰的可持续方法的潜力.
- 为了将微观结构变化与改进的材料性能相关联.
主要方法:
- 以水为基础的超声波预处理莫索竹在不同持续时间 (10-60分钟).
- 分析质量损失,热水提取性含量和绝对干燥密度.
- 使用扫描电子显微镜 (SEM) 进行微观结构检查,观察坑膜和膜壁.
- 使用X射线衍射 (XRD) 评估纤维素结晶性和微纤维角度.
- 对尺寸稳定性 (辐射膨胀) 和吸收湿度的评估.
- 测试菌对黑色菌和青菌的耐药性.
主要成果:
- 超声波预处理改变了竹子的微观结构,导致洞膜破裂和膜壁变薄.
- 纤维素结晶度在治疗10分钟后增加了约8.4%.
- 辐射胀减少了约0.2%,表明尺寸稳定性得到改善.
- 菌耐药性显著改善:A. niger减少了约20%,P. citrinum减少了约83%.
- 处理导致质量损失率和水分吸收量略有增加,提取性含量和密度下降.
结论:
- 以水为基础的超声波预处理是一种有前途的绿色方法,可以提高莫索竹的尺寸稳定性和耐菌性.
- 微观结构的修改,包括增加纤维素结晶性和改变细胞壁结构,是改善特性的关键.
- 这种非化学方法为改善竹子耐用性提供了一个可持续的替代方案,用于实际应用.
相关概念视频
Waterproofing and Anti-Bacterial Admixtures in Concrete
223
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...
223
Wood Surfacing
334
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...
334


