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高性能向前透膜具有超薄的疏水性纳米纤维介层

Cong Ma¹, Zhaoyang Cheng², Meng Zhang²

¹State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China; Tianjin Haiyuanhui Technology Co., Ltd., Tianjin, 300457, China.

|July 19, 2023

概括

使用聚乙烯化物 (PVDF) 纳米纤维作为中间层的新型薄膜复合材料 (TFC) 前进透 (FO) 膜可以防止缺陷,显著提高水流量和抗污染性能,以实现高效的海水淡化.

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:

带有电纳米纤维支层的向前透膜 (FO) 可以减少内部度极化 (ICP).
然而,纳米纤维支中的巨孔通常会导致聚胺 (PA) 选择性层的缺陷.
这种缺陷形成阻碍了FO膜的性能.

研究的目的:

在巨孔纳米纤维支上开发一个无缺陷的PA选择性层.
为了提高薄膜复合材料 (TFC) FO膜的性能.
通过界面聚合 (IP) 调制来改善水流和防物质.

主要方法:

使用疏水性聚乙烯化物 (PVDF) 精细纳米纤维作为中间层.
应用了这种中间层来调节接口聚合 (IP) 过程.
制造的TFC-FO膜与PVDF中间层.

主要成果:

PVDF中间层提高了支层的疏水性,使得一个均,薄,无缺陷的PA层.
该TFC-PVDF膜实现了58.26 LMH (2 M NaCl) 的水流量,是未经修改的膜的两倍.
减少的反向盐流 (4.91 gMH) 和结构参数 (179.43 μm) 表示缓解了ICP.
由于增强的水友性,低泽塔潜力和低粗度,对SA (93.97%的流量回收率) 显示出出色的抗污染性能.

结论:

PVDF中间层是一种有效的策略,用于在纳米纤维支上创建无缺陷的PA层.
开发的TFC-PVDF FO膜表现出卓越的海水淡化性能和抗污染能力.
这种方法为制造高性能FO膜提供了一个有前途的方法.

关键词:

防腐污染防腐污染防腐污染电子旋转是一种电子旋转.前向透技术是指前向透技术.疏水性中间层是一种疏水性中间层.微孔的微孔的

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