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Updated: Jan 18, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

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Published on: August 16, 2018

Advances in Polyimide Membranes for Gas Separation: Synthesis, Modification, and Application.

Qiu-Ying Zhang¹, Heng Mao¹, Meng Wen¹

¹School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China.

Molecules (Basel, Switzerland)

|September 13, 2025

Summary

This summary is machine-generated.

Polyimide (PI) membranes offer superior gas separation but face challenges. This review explores modifications to enhance PI membrane permeability and plasticization resistance for better cost-effectiveness.

Keywords:

gas separation membrane preparation modification polyimide synthesis approach

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Last Updated: Jan 18, 2026

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Area of Science:

Materials Science
Chemical Engineering
Polymer Science

Background:

Membrane technology is crucial for efficient gas separation, with polymer membranes dominating the market.
Polyimide (PI) membranes are favored for their excellent performance, thermal, and chemical stability.
Limitations of traditional PI membranes include low gas permeability and poor plasticization resistance, hindering industrial adoption.

Purpose of the Study:

To review monomer structures, synthesis, and fabrication methods for polyimide-based membranes.
To summarize modification strategies for improving polyimide membrane performance.
To discuss challenges and future prospects for polyimide membranes in gas separation.

Main Methods:

Introduction to polyimide synthesis, including solution-based and solid-state thermal condensation.
Overview of representative polyimide-based membrane preparation techniques.
Summary of modification strategies: thermal rearrangement, cross-linking, and physical blending.

Main Results:

Polyimide membranes show high potential for gas separation applications.
Modification strategies effectively address issues of low permeability and plasticization.
Improved membranes enhance cost-effectiveness and broaden industrial applicability.

Conclusions:

Further improvements in polyimide membrane performance and cost-effectiveness are essential.
Strategic modifications and fabrication methods are key to overcoming current limitations.
The review highlights ongoing challenges and future directions for advanced polyimide gas separation membranes.