引入中间聚电解质层以改善聚酰胺酰亚胺中空纤维膜上的界面聚合

Incorporation of an Intermediate Polyelectrolyte Layer for Improved Interfacial Polymerization on PAI Hollow Fiber Membranes.

作者信息

Restrepo Maria A, Mohammadifakhr Mehrdad, Kamp Johannes, Trzaskus Krzysztof, Kemperman Antoine J B, de Grooth Joris, Roesink Hendrik D W, Roth Hannah, Wessling Matthias

机构信息

Chemical Process Engineering AVT.CVT, RWTH Aachen University, Forckenbeckstraße 51, 52074 Aachen, Germany.

MST-Membrane Science and Technology Cluster, Department of Science and Technology, Mesa+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.

出版信息

Membranes (Basel). 2023 Aug 18;13(8):741. doi: 10.3390/membranes13080741.

In a single-step spinning process, we create a thin-walled, robust hollow fiber support made of Torlon polyamide-imide featuring an intermediate polyethyleneimine (PEI) lumen layer to facilitate the integration and covalent attachment of a dense selective layer. Subsequently, interfacial polymerization of m-phenylenediamine and trimesoyl chloride forms a dense selective polyamide (PA) layer on the inside of the hollow fiber. The resulting thin-film composite hollow fiber membranes show high NaCl rejections of around 96% with a pure water permeability of 1.2 LMH/bar. The high success rate of fabricating the thin-film composite hollow fiber membrane proves our hypothesis of a supporting effect of the intermediate PEI layer on separation layer formation. This work marks a step towards the development of a robust method for the large-scale manufacturing of thin-film composite hollow fiber membranes for reverse osmosis and nanofiltration.

在单步纺丝过程中，我们制造了一种由Torlon聚酰胺-酰亚胺制成的薄壁、坚固的中空纤维支撑体，其具有中间聚乙烯亚胺（PEI）内腔层，以促进致密选择性层的整合和共价连接。随后，间苯二胺和均苯三甲酰氯的界面聚合在中空纤维内部形成致密的选择性聚酰胺（PA）层。所得的薄膜复合中空纤维膜对NaCl的截留率高达96%左右，纯水渗透率为1.2 LMH/bar。制造薄膜复合中空纤维膜的高成功率证明了我们关于中间PEI层对分离层形成具有支撑作用的假设。这项工作标志着朝着开发一种用于大规模制造用于反渗透和纳滤的薄膜复合中空纤维膜的稳健方法迈出了一步。