Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Ion Exchange

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Preclinical Evaluation of <sup>177</sup>Lu-Labeled Anti-CLDN18.2 VHH-Fc for Radioimmunotherapy in Gastric Cancer.

Molecular pharmaceutics·2026

Same author

Correction to "<i>Treponema pallidum</i> Flagellin FlaB3 Activates Inflammation and Inhibits Autophagy in HMC3 Cells via the TLR4 Pathway".

ACS infectious diseases·2026

Same author

Ternary Strategy Enables 18.16% Efficiency in All-Small-Molecule Organic Solar Cells with Improved Fill Factor and Reduced Voltage Loss.

ACS applied materials & interfaces·2026

Same author

An mRNA-LNP vaccine expressing TP0435 provides protective immunity in rabbits against <i>Treponema pallidum</i> challenge.

Emerging microbes & infections·2026

Same author

Core-to-Wing Type Hybrid Dimeric Giant Molecule Acceptors With Different-Length Ester-Linked Alkyl Chains Enable 20.25% Efficiency Organic Solar Cells.

Angewandte Chemie (International ed. in English)·2026

Same author

Body composition radiomics integrated with machine learning to predict prognosis in advanced NSCLC treated with first-line immunochemotherapy and concurrent radiotherapy.

BMC pulmonary medicine·2026

Search research articles

Related Experiment Video

Updated: May 30, 2025

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

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

Published on: August 16, 2018

Intrinsically Microporous Polyimides Based on a Rigid-Soft Structure for Hydrogen Separation.

Zhiyu Lu¹, Ling-Feng Jian¹, Jinyuan Zhang¹

¹School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.

ACS Applied Materials & Interfaces

|January 30, 2025

Summary

This summary is machine-generated.

This study introduces a novel polyimide membrane with a "rigid-soft" structure for efficient hydrogen purification. The new material balances high gas permeability and selectivity while maintaining excellent thermal stability.

Keywords:

gas separation membrane hydrogen purification intrinsically microporous polyimide pacing characteristic thermal stability

More Related Videos

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Published on: December 15, 2015

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Related Experiment Videos

Last Updated: May 30, 2025

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

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

Published on: August 16, 2018

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Published on: December 15, 2015

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Area of Science:

Materials Science
Chemical Engineering
Polymer Science

Background:

Polyimide (PI) membranes are crucial for hydrogen (H2) purification due to their stability.
Intrinsically microporous polyimides offer processing advantages but face a trade-off between permeability and stability.
Improving free volume or chain mobility enhances permeability but often compromises thermal stability.

Purpose of the Study:

To develop a novel polyimide membrane material that overcomes the permeability-selectivity-stability trade-off for H2 purification.
To engineer a "rigid-soft" polymer structure using a carbazole-alkyl-based diamine monomer.
To optimize gas separation performance and thermal properties.

Main Methods:

Synthesis of a carbazole-alkyl-based diamine monomer.
Fabrication of polyimide membranes incorporating the "rigid-soft" structure.
Characterization of membrane properties, including gas permeability, selectivity, and thermal stability (Tg).
Comparison with a reference fluorine-containing polyimide (FPI TFMB-6FDA).

Main Results:

The developed polyimide exhibits a "rigid-soft" structure, balancing polymer chain mobility and packing.
Carbazole groups restrict chain motion, enhancing H2/He selectivity, while alkyl chains improve free volume and interactions.
The PI membrane achieved H2 permeability of 89.61 Barrer, H2/CH4 selectivity of 87.85, and H2/N2 selectivity of 45.03.
A high glass transition temperature (Tg) of 334 °C was obtained, indicating excellent thermal stability.

Conclusions:

The novel "rigid-soft" polyimide effectively addresses the permeability-selectivity-stability challenge in gas separation membranes.
The designed monomer structure provides a viable strategy for enhancing both performance and durability.
This material shows significant potential for advanced H2 purification applications.