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确定深度环氧溶剂预处理程度,纤维素结构特征和细胞处理中的溶解效率之间的构成关系
Meiwen Zhang1, Yuqian Guo1, Yun Cheng1
1China National Pulp and Paper Research Institute Co., Ltd, Beijing, 100102, PR China; National Engineering Lab for Pulp and Paper, Beijing, 100102, PR China.
International journal of biological macromolecules
|November 11, 2025
概括
一种新型的深溶解剂 (DES) 预处理显著增强了纤维素在N-甲基摩尔福林-N-氧化物 (NMMO) 中的溶解. 这种方法减少了溶解时间,并通过破坏纤维素结构来提高效率.
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
- 绿色化学 绿色化学
背景情况:
- 传统的纤维素溶解在N-methylmorpholine-N-oxide (NMMO) 需要高温和长时间,导致产品质量差.
- 在NMMO溶解中的恶劣条件限制了纤维素加工效率和材料性能.
研究的目的:
- 开发一种简单的预处理策略,以提高NMMO中纤维素溶解效率.
- 为了确定深溶解剂 (DES) 预处理,纤维素结构和溶解率之间的关系.
- 研究改善溶解和纤维素结构变化背后的机制.
主要方法:
- 采用化/酸 (ZnCl2/H3PO4) 的多重度梯度作为纤维素预处理的深溶剂 (DES).
- 使用偏光显微镜观察NMMO溶解期间的纤维素纤维形态.
- 量化分析了DES度梯度与纤维素纤维结构参数之间的关系.
主要成果:
- DES预处理有效地破坏了纤维素的无形区域,暴露了键并加速了NMMO的溶解.
- 在NMMO溶解后DES处理期间观察到一种新的空心纤维现象,表明同时内部和外部溶解.
- 优化的预处理减少了NMMO中的纤维素溶解时间,从40分钟减少到13分钟.
结论:
- 一个DES预处理策略为纤维素溶解提供了一种高效的方法,克服了传统NMMO加工的局限性.
- 这项研究揭示了一种定量机制,将DES的纤维素结构修饰与增强的溶解动力学联系起来.
- 这种方法为改善纤维素加工提供了途径,减少了能源消耗和时间.
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