Related Experiment Video
Updated: May 10, 2026
06:15
Wet Chemistry and Peptide Immobilization on Polytetrafluoroethylene for Improved Cell-adhesion
Published on: August 15, 2016
7.8K
High-Performance Electrochemical Adhesives Enabled by Perfluorinated Sulfonic-Acid Ionomers with Precise Adhesion
Yoon-Je Choi1, Seungju Lee1, Younghoon Kim1
1Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107, Republic of Korea.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|August 22, 2025
Summary
Researchers developed novel electrochemical adhesives using perfluoro-sulfonic acid (PFSA) ionomers for switchable adhesion. These adhesives offer tunable, long-term bonding without continuous power, demonstrating precise control via electrical charge density.
Area of Science:
- Materials Science
- Electrochemistry
- Surface Science
Background:
- Electrically switchable adhesion offers dynamic control over bonding.
- Existing methods often require continuous power or lack precise tunability.
Purpose of the Study:
- To introduce a new class of electrochemical adhesives based on perfluoro-sulfonic acid (PFSA) ionomers.
- To investigate the tunable adhesion properties and long-term performance of these PFSA-based adhesives.
Main Methods:
- Investigated electrochemically tunable adhesion between PFSA ionomers and copper substrates.
- Applied varying electrical potentials to modulate adhesion.
- Utilized fracture mechanics to analyze the relationship between adhesion and applied charge density.
Main Results:
- Demonstrated robust adhesion controllable by applied charge density.
- Established a linear relationship between critical energy release rate (Gc) and charge density (q).
- Achieved high force capacity (200 N cm-2) and on/off ratio (462) in lap-shear clutches.
Conclusions:
- PFSA ionomers provide a versatile platform for programmable, switchable adhesion.
- Adhesion is governed by electrochemical reactions and precisely modulated by charge density.
- These adhesives offer superior performance and long-term retention without continuous power.
Related Concept Videos
01:17Ion 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 basic...
01:30Superplasticizers
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...