A sanidine / high molecular polymer pervaporation composite membrane and a preparation method thereof

By preparing a magnolite/polymer pervaporation composite membrane, the problem of low acid stability of zeolite membranes in acidic solutions was solved, and the high efficiency of pervaporation performance was improved, especially with good separation effect in acidic environments.

CN117531379BActive Publication Date: 2026-06-09FUJIAN UNIV OF TECH
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Patent Information

Application Number
CN202311668957.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-07
Publication Date
2026-06-09
Estimated Expiration
2043-12-07

AI Technical Summary

Technical Problem

Existing zeolite membranes exhibit low acid stability when used in acidic solutions, and the dispersibility between polymer membranes and inorganic materials affects the performance of composite membranes, thus limiting their application.

Method used

Silica sol was prepared using the Stöber method as a precursor, and nepheline was synthesized via a hydrothermal method. The nepheline was then crosslinked with a polymer and a crosslinking agent to prepare a nepheline/polymer pervaporation composite membrane. The pore structure and hydroxyl groups of nepheline were used to improve the hydrophilicity and selectivity of the membrane.

Benefits of technology

The prepared magenta/polymer pervaporation composite membrane exhibits good permeation flux and selectivity in acidic environments. The surface structure promotes water molecule transport and enhances the separation performance of the composite membrane.

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Abstract

The application discloses a perovskite / high polymer pervaporation composite membrane and a preparation method thereof. The perovskite / high polymer pervaporation composite membrane is prepared by taking silica sol with a certain particle size as a precursor to prepare perovskite, then mixing the dispersed perovskite with a high polymer solution and a crosslinking agent, and coating the mixture to obtain the perovskite / high polymer pervaporation composite membrane. The perovskite contained in the pervaporation composite membrane is a highly hydrophilic material, has the property of preferentially adsorbing water, and the porous perovskite is highly dispersed in the matrix and has the property of promoting the diffusion of water molecules. The surface of the membrane and the membrane can also form special channels for water molecule transmission through the "through" effect of the perovskite, so that the permeation flux and selectivity of the pervaporation composite membrane to the separated components can be simultaneously increased.
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