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在用水基涂层完成之前,用聚乙烯胺溶液表面处理木的效果
Tanja Palija1, Milica Rančić1, Daniela Djikanović2
1Faculty of Forestry, University of Belgrade, 11030 Belgrade, Serbia.
Polymers
|January 11, 2025
概括
聚乙烯胺 (PEI) 表面处理大大减少了木材的吸水量和表面能量. 高分子量PEI提高了木材表面的水性烯酸涂层性能.
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
- 表面化学 表面化学
背景情况:
- 木材容易吸水,导致尺寸不稳定性和表面退化.
- 木材的表面修改对于提高其耐用性和与涂料的兼容性至关重要.
- 聚乙烯胺 (PEI) 是一种具有木材表面功能化潜力的聚合物.
研究的目的:
- 研究聚乙烯胺 (PEI) 处理对木表面的影响.
- 评估PEI分子量和度对木材特性的影响.
- 评估基于水的透明烯酸涂层 (WTAC) 对PEI处理的木材的性能.
主要方法:
- 木材样本用不同度 (0.5%,1%,2%) 和分子量 (低和高) 的PEI溶液处理.
- 表面特征包括FT-IR光谱,EPI光光谱,SEM,湿,表面能量和水吸收测量.
- 评估了涂层木材的特性,如薄膜厚度,涂层透度,粘合强度和表面粗度.
主要成果:
- 高分子量PEI (HMW PEI) 沉积在木材表面,而低分子量PEI (LMW PEI) 则透得更深.
- 1%的HMW PEI处理使水吸收减少了72%,表面能量减少了23.2%.
- PEI处理保持了水性透明烯酸涂层的粘合强度,并减少了表面粗度.
结论:
- PEI表面处理有效地减少了木材的吸水量,并改变了表面能量.
- 高密度PEI在表面沉积方面更有效,提高了涂层性能.
- PEI处理提高了用水基系统涂层的木材的耐用性和完成品质.
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