Tailor-made iron-organic molecular cage embedded polydimethylsiloxane membranes via emulsion casting technique for efficient VOCs removal

Qu Zheng; Huang Jiamin; Wu GuoliangDong LiangliangZhang ChunfangBai Yunxiang

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Tailor-made iron-organic molecular cage embedded polydimethylsiloxane membranes via emulsion casting technique for efficient VOCs removal

机译：Tailor-made iron-organic molecular cage embedded polydimethylsiloxane membranes via emulsion casting technique for efficient VOCs removal

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摘要

Urgent needs for the removal of volatile organic compounds (VOCs) from gas streams has stimulated a vigorous research for high-performance separation membranes. Herein, porous iron-organic molecular cage (Fe-cage) embedded polydimethylsiloxane (PDMS) mixed miatrix membranes (MMMs) were fabricated through emulsion casting method for efficient VOCs removal. The membrane separation performance was systematically investigated by separating VOC/N-2 gas mixtures under various operating conditions (e.g., feed concentration, operating temperature) using n-hexane, n-heptane, and cyclohexane as model organic vapors. It was found that the resultant membranes demonstrated homogeneous Fe-cage dispersion and intimate interfacial adhesion. With the increase of the Fe-cage loading, the MMMs demonstrated obviously improved permselectivity for the separation of n-hexane/N-2 and n-heptane/N-2. The MMM containing 4 wt% Fe-cage showed a n-heptane permeability of 1657 x 10(-8) mol mu m m(-2) s(-1) Pa-1 and a n-heptane/N-2 selectivity of 145 at 25 degrees C when the feed concentration is 4.3 mol%. These values were 231% and 158% of those for the pristine PDMS membrane, respectively. Furthermore, the VOC permeability and VOC/N-2 selectivity of the membranes increased with decreasing operating temperature or increasing feed concentration. Because of its excellent mixed-gas VOC/N-2 permselectivity, the Fe-cage embedded PDMS membrane could find use in petrochemical applications such as gasoline vapor recovery.

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《Journal of Applied Polymer Science》 |2022年第42期|共15页
作者
Qu Zheng; Huang Jiamin; Wu GuoliangDong LiangliangZhang ChunfangBai Yunxiang;
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Jiangnan Univ;

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正文语种英语
中图分类高分子化合物工业（高聚物工业）;
关键词
iron-organic molecular cage; mixed matrix membrane; polydimethylsiloxane; VOC removal; MIXED-MATRIX MEMBRANES; VAPOR PERMEATION; COMPOSITE MEMBRANES; VOC/N-2 MIXTURES; SEPARATION; PERFORMANCE; POLYHEDRA; NITROGEN;

Tailor-made iron-organic molecular cage embedded polydimethylsiloxane membranes via emulsion casting technique for efficient VOCs removal

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