化改进硬木机电宁用于木材粘合剂的应用
Li-Yuan Liu1, Wan-Shuan Chiang1, Hou-Min Chang2
1School of Forestry and Resource Conservation, National Taiwan University, Taipei 106, Taiwan.
Polymers
|July 13, 2024
概括
这项研究将硬木力气宁 (KL) 转化为化力气宁 (PKL),用于甲 (PF) 粘合剂. 这种生物基替代品减少了对石油的依赖和木材复合材料中的甲排放.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- 素是丰富的,生物基的芳香聚合物,有可能取代石油衍生产品.
- 甲 (PF) 粘合剂广泛用于木材复合材料,但是以石油为基础的.
- 硬木 kraft 素 (KL) 的反应性较低,限制了其直接应用.
研究的目的:
- 修改低反应性的硬木 kraft 素 (KL) 成为 PF 粘合剂的替代品.
- 通过酸性化来实现这种修饰.
- 开发一种可持续的,生物基的粘合剂,减少甲排放.
主要方法:
- 使用硫酸 (H2SO4) 作为催化剂,酸性化硬木 kraft 素 (KL).
- 在90°C以3/5 (重量/重量) 的比例加热KL和2小时.
- 在同一个反应器中直接合成resole类型的化 kraft 素-甲 (PKL-PF) 粘合剂.
主要成果:
- 成功化KL,产生与交叉链接的类的化 kraft 素 (PKL).
- 优化化条件:3/5 (w/w) KL/,90°C,2小时,5%的H2SO4.
- 合成的PKL-PF粘合剂表现出令人满意的合板强度和低甲排放.
结论:
- 酸性化有效地提高了硬木 kraft 素的反应性,用于粘合剂应用.
- 开发的PKL-PF粘合剂为以石油为基础的PF粘合剂提供了一个可持续的替代品.
- 这种方法减少了对化石燃料的依赖,并提高了硬木木质素的利用率.
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