修改纤维素纳米晶与环氧化甘露油,以提高与多乳酸的界面兼容性
Mohamed Wahbi1, Yidan Wen1, Marianna Kontopoulou1
1Department of Chemical Engineering, Smith Engineering, Queen's University, Kingston, ON, Canada.
Carbohydrate polymers
|October 21, 2025
概括
纤维素纳米晶体 (CNCs) 与氧化甘油 (ECO) 的可持续修改提高了它们与聚乳酸 (PLA) 的兼容性. 这提高了PLA复合材料的CNC分散和热稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术 纳米技术
背景情况:
- 纤维素纳米晶体 (CNCs) 具有出色的机械性能,但在聚合物矩阵中兼容性和分散性差.
- 疏水性修饰对于将CNC集成到诸如聚乳酸 (PLA) 等疏水性聚合物中至关重要.
- 现有的CNC修改方法可能会损害CNC结构或引入处理问题.
研究的目的:
- 使用环氧化甘油 (ECO) 开发一种可持续的CNC的疏水性修饰.
- 为了提高CNC在聚乳酸 (PLA) 矩阵中的兼容性和分散性.
- 为了提高CNC-PLA复合材料的热稳定性和加工窗口.
主要方法:
- 通过氧化环开环反应与环氧化甘露油 (ECO) 对CNC的疏水性修饰.
- 使用接触角度测量和X射线衍射 (XRD) 进行修改过的CNC (CNC-g-ECO) 的表征.
- 用PLA (1重量%) 复合整洁和修改的CNC,并通过极化光学显微镜评估分散.
主要成果:
- 经过修改的CNC (CNC-g-ECO) 显示出增加的疏水性 (水接触角度从33°到73°).
- XRD证实,CNC晶体结构在经过修改后仍然完好无损.
- 在各种加工方法中观察到,CNC-g-ECO在PLA矩阵内的分散和分布得到了改善.
- 修改后的CNC充当了核化剂,增加了PLA的结晶度.
- 提高了CNC-g-ECO/PLA复合材料的热稳定性和减轻变色/热老化.
结论:
- 使用ECO对CNC进行可持续的疏水改造是可行的和有效的.
- 经过修改的CNC在PLA中表现出卓越的兼容性和分散性.
- 这种方法提高了CNC-PLA复合材料的热性能和可加工性.
- 该方法为聚合物矩阵中的CNC提供了一个扩展的热处理窗口.
- 这促进了基于CNC的高性能复合材料的开发.
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