Engineering organic solvent reverse osmosis in hybrid AlOxHy / polymer of intrinsic microporosity 1 (PIM-1) membranes using vapor phase infiltration

IF 4.9 Q1 ENGINEERING, CHEMICAL Journal of Membrane Science Letters Pub Date : 2023-11-01 DOI:10.1016/j.memlet.2023.100064

Yi Ren , Benjamin C. Jean , Woo Jin Jang , Akriti Sarswat , Young Joo Lee , Emily K. McGuinness , Kshitij Dhavala , Mark D. Losego , Ryan P. Lively

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Abstract

A solvent-free post-treatment process known as vapor phase infiltration (VPI) is used to engineer the organic solvent reverse osmosis (OSRO) performance of polymer of intrinsic microporosity 1 (PIM-1) membranes via infiltration of trimethylaluminum (TMA) metal-organic vapor. The infiltration of inorganic aluminum constituents hybridizes the pure polymer PIM-1 into an organic-inorganic material (AlO_xH_y/PIM-1) with enhanced chemical stability. A homogenous distribution of inorganic loading in PIM-1 is achieved due to the reaction-limited infiltration mechanism, and the OSRO performance is enhanced as a result. OSRO separations of ethanol/isooctane mixtures using these membranes are shown to be capable of breaking the azeotropic composition with a separation factor for ethanol over isooctane greater than 5 and an ethanol permeance of 0.1 Lm^–2h^–1bar^–1. Thus, these organic-inorganic hybrid membranes created via VPI show promise as an alternative method for separating azeotropic liquid mixtures.

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工程有机溶剂反渗透在混合AlOxHy /聚合物的固有微孔1 (PIM-1)膜上的气相渗透

采用无溶剂后处理工艺——气相渗透(VPI)，通过三甲基铝(TMA)金属有机蒸汽的渗透，设计了固有微孔1 (PIM-1)膜聚合物的有机溶剂反渗透(OSRO)性能。无机铝组分的渗透使纯聚合物PIM-1杂化成有机无机材料(AlOxHy/PIM-1)，化学稳定性增强。由于反应受限的渗透机制，PIM-1中无机负载分布均匀，从而提高了OSRO性能。使用这些膜对乙醇/异辛烷混合物进行OSRO分离表明，乙醇在异辛烷上的分离系数大于5，乙醇渗透率为0.1 Lm-2h-1bar-1，能够破坏共沸组成。因此，通过VPI制造的有机-无机杂化膜有望成为分离共沸液体混合物的替代方法。

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Journal of Membrane Science Letters

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4.00

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