Hydrophobic MOF material-based mixed matrix membrane and preparation method thereof

By adopting a mixed matrix flat film based on hydrophobic MOF materials in the membrane separation technology, and using the impregnation and lifting process, the "trade-off" effect between selectivity and permeability in the prior art and the scale limitations of the membrane preparation process are solved, and efficient butanol separation is achieved.

CN119680403AActive Publication Date: 2025-03-25NINGBO UNIV +1
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Patent Information

Application Number
CN202411952040.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-03-25
Estimated Expiration
2044-12-27

AI Technical Summary

Technical Problem

The existing membrane separation technology has a "trade-off" effect between selectivity and permeability in the separation process of butanol, and the traditional spin coating process limits the effective area and separation efficiency of the film, making it difficult to achieve large-scale production.

Method used

A mixed matrix flat film based on hydrophobic MOF material is used to load it onto a flat carrier through an impregnation and lifting process, and combined with specific cast film liquid ratios and process parameters, a film with high selectivity and high permeability is prepared.

Benefits of technology

It achieves the improvement of the permeability of the membrane while ensuring high selectivity, expands the effective area of ​​the membrane, is suitable for industrial-scale production, and shows good performance in butanol separation.

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Abstract

The invention discloses a hydrophobic MOF material-based mixed matrix flat sheet membrane and a preparation method and application thereof.The preparation method comprises the following steps: S1, weighing an MOF material and a cross-linking agent, adding the weighed MOF material and cross-linking agent into a solvent, and fully and uniformly mixing to obtain a solution A; s2, weighing an organic polymer, adding a solvent, and fully and uniformly mixing to obtain a solution B; s3, preparing a membrane casting solution: mixing the solution A and the solution B, fully and uniformly mixing, adding a catalyst, and uniformly mixing to obtain the membrane casting solution; and S4, mounting a flat plate support body on a pulling machine, loading the membrane casting solution on the flat plate support body by adopting a dip-coating process, and then drying to obtain the mixed matrix flat plate membrane. The dipping, extracting and film-drawing process has the advantages of wide applicability, simplicity and convenience in operation, controllable film thickness, uniformity and transparency of the film and low energy consumption, the prepared film is uniform, the area of the film is larger, and the permeability of the film can be improved while high selectivity of the mixed matrix film is ensured.
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