在基于形态的溶剂中对纤维素溶解的研究:溶剂结构特征对纤维素溶解的影响
Shirin Naserifar1,2, Andreas Koschella3, Thomas Heinze3
1Department of Chemistry and Chemical Engineering, Chalmers University of Technology 412 96 Gothenburg Sweden shirinn@chalmers.se +46317722999.
RSC advances
|June 22, 2023
概括
新型形态氧化物和酸盐有效地溶解纤维素. 在形态氧化物上较长的链增强了室温溶解,而酸盐需要DMSO. 化是无效的纤维素溶剂.
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:
- 纤维素是一种关键的生物聚合物,由于其广泛的键网络,它存在溶解挑战.
- 开发高效和环保的纤维素溶剂对于生物质加工和材料创新至关重要.
- 离子液体及其衍生物被探索为潜在的纤维素溶剂.
研究的目的:
- 合成和研究用于纤维素溶解的基于形态的离子液体.
- 阐明控制纤维素-溶剂相互作用的结构-性质关系.
- 为这些潜在的纤维素溶剂开发可持续的合成方法.
主要方法:
- 合成具有不同N-链和化物,酸盐或氧化物对应离子的N-甲基盐.
- 使用可回收的离子交换树脂利用水基和微波辅助反应.
- 使用13C NMR,尺寸排除色谱和流量扫描测量来表征纤维素溶液;通过固态NMR分析乙醇凝结物.
主要成果:
- 甲基氧化物,特别是那些基链比乙基更长的甲基氧化物,在室温下表现出有效的纤维素溶解.
- 酸盐,作为离子液体,在与二甲基硫氧化物 (DMSO) 结合时溶解纤维素.
- 化是湿透的,具有高点,溶解性差,并且不会溶解或膨胀纤维素.
结论:
- 反离子的性质和N-链的长度显著影响了morpholinium盐的纤维素溶解能力.
- 甲基氧化物为室温纤维素溶解提供了一个有前途的途径,与绿色化学原理保持一致.
- 与DMSO等辅溶剂相结合的乙酸盐也可以有效用于纤维素加工.
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