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对于固木粘合剂的粉-素粘合剂的优化
Annalisa Magnabosco1, Illya Kulyk1, Maurizio Avancini1
1TESAF Department, University of Padua, Viale dell'Università 16, 35020 Legnaro, PD, Italy.
Polymers
|June 27, 2024
概括
这项研究优化了使用粉和 tannin 的生物基木,实现了 D2 类别的耐水性. 最佳条件是13分钟以140°C的温度加热,特定的素比例提高了耐用性.
科学领域:
- 木材技术 木材技术 在
- 材料科学 材料科学 材料科学
- 可持续化学 可持续化学
背景情况:
- 开发有效的生物基粘合剂用于实木是可持续木材建筑的关键.
- 传统的木往往依赖于具有环境关切的合成树脂.
- 粉-粉配方提供了一个有希望的环保替代品.
研究的目的:
- 为了优化合条件的粉-素粘合剂配方.
- 为了达到D2分类 (EN 204) 对于木质接头的防水性.
- 研究配方组件和加工参数对粘合剂性能的影响.
主要方法:
- 优化加热温度和粉素粘合的时间.
- 在配方中改变素和素-胺的比例.
- 评估干燥性能和耐水性 (3小时浸水试验).
- 寒冷大气等离子体的应用,以加强透.
- 固态13C-NMR分析以阐明化学相互作用.
主要成果:
- 在优化条件下 (140°C13分钟) 干燥和浸水样品获得D2分类.
- 多醇含量高达20-30%增强了耐水性.
- 添加10%的素-胺 (来自奎布拉科或栗子提取物) 改善了耐水性.
- 冷大气等离子体改善了粘性配方的透.
- 核磁共振分析表明,粉和 tannin之间形成了协调复合体.
结论:
- 一种粉-素粘合剂配方可以实现D2分类的固木粘合.
- 加热温度,时间和多含量是优化性能的关键参数.
- 素-胺和冷大气等离子体是有效的增强水阻力和透的增强剂.
- 粉-胺协调复合物的形成有助于粘合剂的特性.
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