开发新的离子共价有机框架复合纳米过膜用于染料/盐分离
Qiuyu Miao1, Ying Wang1, Dongru Chen1
1Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, People's Republic of China.
Journal of hazardous materials
|December 3, 2023
概括
使用离子共价有机框架 (iCOF) 制造高性能复合膜,以高效地分离染料和盐. 这些膜表现出优异的稳定性和抗污染性能,为净化水提供了一种新的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 聚合有机框架 (COF) 具有有利的特性,如高孔隙性和热稳定性,使其适用于膜应用.
- 传统的COF膜制造方法往往导致机械强度差.
- 对于COF复合膜的现有方法包括界面聚合,真空过和磨料涂层.
研究的目的:
- 开发高性能COF复合膜,以有效分离染料/盐.
- 解决传统COF膜机械性能差的局限性.
- 探索离子COF (iCOF) 在先进的分离技术中的潜力.
主要方法:
- 使用修改的造-沉-蒸发方法制造COF复合膜.
- 在支层上加入离子COF (iCOF) 选择性层.
- 测试膜在染料/盐分离中的性能,包括透性和排斥率.
主要成果:
- 实现了高透性 (∼68 L h-1 m-2) 和高染料排斥 (97%的孟加拉).
- 证明盐排斥率低 (NaCl的≤2.86%),可以选择性去除染料.
- 复合材料膜表现出水友性,光滑的表面,具有良好的防性能和在高压和超声波处理下出色的稳定性.
结论:
- 经过修改的造-沉-蒸发方法成功生产了强大的iCOF复合膜.
- 这些膜显示出在水处理中高效和选择性染料/盐分离的巨大潜力.
- 这项工作为制造基于iCOF的先进分离膜提供了一种有前途的新方法.
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