聚多巴胺修饰的碳化纤维素纳米晶体作为聚硫 (PES) 膜的功能填充剂,以实现优质的染料/盐分离
Lin Ding1, Deyi Han1, Haichuan Zhang2
1State Key Laboratory of Bio-based Fiber Materials, College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
International journal of biological macromolecules
|April 1, 2025
概括
先进的聚硫 (PES) 超膜被增强了聚多巴胺涂层的碳氧化纤维素纳米晶体 (PDA@C-CNC). 这些功能填充剂显著改善了织废水处理的水流和染料排斥.
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:
- 聚乙硫 (PES) 膜广泛用于超过,但往往遭受低水流和污染.
- 开发功能性填充剂以提高膜性能对于高效的水处理至关重要.
研究的目的:
- 开发先进的PES超膜,使用聚多巴胺涂层的碳化纤维素纳米晶体 (PDA@C-CNC) 作为功能填充剂.
- 研究PDA@C-CNC对膜结构,水友性,透性和选择性的影响.
主要方法:
- 通过现场自聚合合成PDA@C-CNC.
- 使用非溶剂诱导相分离 (NIPS) 用PDA@C-CNC作为表面分离剂制造复合膜.
- 膜形态,水友性和性能 (水流,染料/盐排斥) 的表征.
主要成果:
- PDA@C-CNC颗粒迁移到膜表面,形成一个密集的,含有极性功能群的水友性层.
- 支层呈现出一个改进的多孔结构,具有更宽的腔,增强了质量转移.
- 与未经修改的膜相比,修改的膜 (MPC0.2) 显示水流量增加了2.29倍 (332 L·m−2·h−1·bar−1).
- 实现了异常的染料排斥 (>99.7%的刚果红色,>97.7%的Eriochrome黑T) 和最小的盐排斥 (<1.7%).
结论:
- 密集的选择性层和多孔的支层的协同效应显著提高了膜的性能.
- PDA@C-CNC/PES复合膜显示出高效和选择性去除织废水中的染料和盐的巨大潜力.
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