交叉连接的纤维素纳米晶膜与胆固醇组装
Berk C İçten1, Emre Bukusoglu1, P Zeynep Çulfaz-Emecen1
1Department of Chemical Engineering, Middle East Technical University, Çankaya, Ankara 06800, Turkiye.
Langmuir : the ACS journal of surfaces and colloids
|June 13, 2024
概括
这项研究引入了一种新的化学交联方法来稳定纤维素纳米晶 (CNC) 膜,提高其适用于可扩展应用的耐用性. 这种新方法增强了膜完整性,特别是在干燥后,克服了以前物理稳定技术的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 化学工程是化学工程的重要组成部分.
背景情况:
- 纤维素纳米晶 (CNC) 膜通过接触式流沉积提供可调节的分离性能.
- 以前的稳定方法依赖于不可逆转的盐诱导凝固,限制了可扩展性.
- 需要强大的稳定技术,与膜干燥等工业过程相兼容.
研究的目的:
- 开发和演示一种用于稳定CNC膜的新型化学交联方法.
- 为了研究含有carboxyl的TEMPO-氧化CNCs的Ag(I) 催化氧化脱碳化,用于膜稳定.
- 为了评估与物理稳定相比,交联CNC膜的性能和稳定性.
主要方法:
- 经过TEMPO氧化的CNC被碳氧化并使用AgNO3和KPS溶液进行交叉链接.
- 膜形成涉及TEMPO-CNC悬浮物的触流沉积到多孔支上.
- 通过度,动态光散射,质和排斥测试 (蓝色德克斯特兰) 评估了交叉链接的有效性.
主要成果:
- 在悬浮和膜内证实了TEMPO-CNCs的成功化学交叉链接.
- 交叉连接的膜实现了高的蓝色德克斯排斥 (高达95.9%).
- 交叉连接的膜在干燥后保持完整,与物理稳定膜不同,这些膜会破裂.
结论:
- Ag(I) 催化氧化脱碳化为稳定CNC膜提供了有效的后处理.
- 这种化学交联方法提高了膜的稳定性,特别是在扩大规模所需的干燥过程中.
- 交叉连接方法为工业生产和存储数控膜提供了显著的优势.
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