带有GVL的Kraft Lignin基聚氨:一种可持续的涂层替代品可用于回收装饰板
Julia C Figueiredo1,2, Roberto C C Lelis1, Rosane N Castro1
1Forest Products Department, Forestry Institute, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica 23897-000, RJ, Brazil.
Polymers
|January 10, 2026
概括
这项研究开发了可持续的生物基聚氨 (PU) 涂层,用于回收纸包装. 这些环保涂料提高了耐水和耐油性,为传统塑料提供了更绿色的替代品.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 可持续的包装 包装是可持续的
背景情况:
- 食品包装在很大程度上依赖于塑料,这导致了由于降解性差的环境问题.
- 当前的包装材料在保存易腐烂的商品方面通常具有有限的性能.
- 包装行业对可持续替代品的需求越来越大.
研究的目的:
- 通过工业软木 kraft 素和 γ-瓦莱洛拉克 (GVL) 合成生物基聚氨 (PU) 涂层.
- 为了评估这些PU涂层在用于包装应用的回收板上的性能.
- 探索可持续利用纸和纸业的副产品 - - 红素的价值.
主要方法:
- 使用六甲二酸盐 (HDI) 合成基于素的PU,并由1,4-diazabicyclo[2.2.2]octane (DABCO) 催化.
- 在不同重量 (13.5,16.5和23.5g/m2) 的回收板上涂上了PU涂层.
- 评估了屏障性能 (WVTR,Cobb1800,耐油性) 和机械性能 (RCT,拉力指数).
主要成果:
- 涂层应用显著降低了水蒸气传递率 (WVTR) 和Cobb1800值,表明增强了耐水性.
- 耐油性得到了显著的改善,在最高的涂层重量下获得了11的Kit评级.
- 机械性能,包括环粉碎强度 (RCT) 和拉伸度指数,得到了维持或改进.
- 基于素的PU涂层在包装纸上表现出优越的屏障和机械性能.
结论:
- 基于素的PU涂层为以石油为基础的包装材料提供了有效和环保的替代品.
- 这种方法增加了木质素的价值,促进了纸和纸行业的循环经济.
- 开发的涂层支持向更可持续和高性能包装解决方案的过渡.
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