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Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives
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A High-Strength Phase-Separated Underwater Adhesive with Self-Reinforcement in Dynamic Water
Weicheng Gao1, Qianyu Wei2, Yaning Wei1
1Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China.
ACS Applied Materials & Interfaces
|February 5, 2026
Summary
This study introduces a novel self-reinforcing underwater adhesive that repels water and enhances bonding strength in dynamic aquatic environments. The innovative material offers superior adhesion, recyclability, and practical applications for underwater repairs.
Area of Science:
- Materials Science
- Polymer Chemistry
- Surface Chemistry
Background:
- Underwater adhesives face challenges due to water interference, leading to reduced adhesion.
- Dynamic water conditions exacerbate adhesive molecule loss and decrease bonding strength.
Purpose of the Study:
- To develop a phase-separated underwater adhesive with self-reinforcing properties for dynamic water environments.
- To investigate the mechanism of water-accelerated phase separation for enhanced adhesion.
- To evaluate the adhesive's performance, adaptability, recyclability, and potential applications.
Main Methods:
- Copolymerization of hydrophilic and hydrophobic monomers to create a phase-separated structure.
- Investigating dynamic water-accelerated phase separation kinetics.
- Quantifying adhesion strength in static and dynamic water conditions.
- Assessing recyclability and performance in various aquatic environments.
Main Results:
- The developed adhesive demonstrates superior adhesion in dynamic water, achieving 1.97-fold the strength of static conditions.
- Dynamic water promotes phase separation, creating a dense surface that minimizes adhesive loss and expands the bonding area.
- The adhesive exhibits excellent adaptability across different water environments and retains 95% of its strength after recycling.
Conclusions:
- The novel phase-separated adhesive offers robust underwater bonding through self-reinforcement mechanisms.
- Its water-repelling and self-reinforcing characteristics make it highly effective in dynamic aquatic settings.
- The adhesive's recyclability and performance highlight its potential for sustainable and practical underwater applications.
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