A thermally cross-linked vermiculite nanosheet membrane and a preparation method and application thereof

By using a thermally cross-linked vermiculite nanosheet membrane preparation method and controlling the interlayer spacing, the constraint between permeability and selectivity of polymer gas separation membranes was resolved, achieving precise sieving of small molecule gases and improved hydrogen separation performance, making it suitable for industrial applications.

CN122298217APending Publication Date: 2026-06-30SOUTH CHINA UNIV OF TECH
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Filing Date
2026-04-04
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing polymer gas separation membranes have a limiting relationship between permeability and selectivity, making it difficult to meet the needs of hydrogen separation in industrial production. Furthermore, traditional gas separation technologies are energy-intensive, require large equipment investments, and are complex to operate.

Method used

A thermally cross-linked vermiculite nanosheet membrane was prepared by controlling the interlayer spacing of vermiculite nanosheets through heat treatment to form a gas separation membrane with excellent separation performance. The process includes steps such as thermal expansion, ion exchange, and ultrasonic dispersion, and finally a thin film is formed on a porous alumina support sheet.

Benefits of technology

It achieves precise sieving of small molecule gases, improves hydrogen separation performance, has good chemical and thermal stability, and is suitable for large-scale industrial applications.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122298217A_ABST
    Figure CN122298217A_ABST
Patent Text Reader

Abstract

This invention discloses a thermally crosslinked vermiculite nanosheet membrane, its preparation method, and its applications, suitable for separating and purifying hydrogen from mixed gases. The thermally crosslinked vermiculite nanosheet membrane is prepared by ion exchange of vermiculite nanosheets, which are then assembled into a membrane. Crosslinking between the membrane layers is induced through heat treatment. By controlling the heat treatment temperature, the interlayer spacing of the thermally crosslinked vermiculite nanosheet membrane can be effectively adjusted, thus exhibiting good gas permeation flux and separation selectivity. The method of this invention requires no external crosslinking agent, is simple, environmentally friendly, and uses widely available raw materials. The resulting thermally crosslinked vermiculite nanosheet membrane has broad application prospects in hydrogen purification and other fields.
Need to check novelty before this filing date? Find Prior Art