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微粒调节的薄膜纳米复合物膜具有增强的纳米过性能

Linhan Ni¹, Min Li¹, Jia Xie¹

¹Key Laboratory of New Membrane Materials, Ministry of Industry and Information Technology, School of Environment and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Journal of colloid and interface science

|February 16, 2024

概括

本研究介绍了薄膜纳米复合材料 (TFN) 膜的米塞尔调节界面聚合 (MRIP) 策略,显著提高了纳米过 (NF) 性能,改善了水透率和盐排斥.

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.
膜技术膜技术膜技术

背景情况:

薄膜纳米复合材料 (TFN) 膜性能是由纳米填充剂和聚胺 (PA) 层结构决定的.
优化TFN膜需要在界面聚合过程中精确控制PA层的形成.

研究的目的:

为提高TFN膜纳米过 (NF) 性能开发一个微粒调节的界面聚合 (MRIP) 策略.
调查细胞在调节PA层结构和改善膜性质方面的作用.

主要方法:

在IP期间使用聚乙烯氧化物-b-聚4-乙烯化物-b-聚乙烯 (PEO-PVP-PS) 三块共聚合物微粒制造TFN膜.
调节PA层结构,通过改变微粒度和三聚化 (TMC) 含量来调节PA层结构.
膜性能的表征,包括透率和盐排斥 (Na2SO4).
通过扩散和界面张力测试来研究MRIP机制.

主要成果:

优化的TFN膜 (TFN-2-0.3) 实现了20.7 L m−2h−1bar−1的透率和99.3%的Na2SO4排斥.
与控制膜相比,这几乎是透率的两倍,排斥率高2.7%.
该MRIP策略导致更密,更薄的PA层,增加了粗性和水友性.

结论:

MRIP 策略有效地利用细胞来调节 PA 层的形成,提高 TFN 膜 NF 的性能.
微粒降低界面张力,促进反应物扩散,加速IP,从而产生优越的膜性质.
这些发现突显了微粒模板TFN膜在先进的分离应用中的潜力,包括提高了酸抗性.

关键词:

界面聚合的介面聚合.微粒菌 (Micelles) 是一种微粒菌.纳米过的纳米过方法薄膜纳米复合材料的薄膜.

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