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Related Experiment Video

Updated: Aug 6, 2025

Fabrication of Large-area Free-standing Ultrathin Polymer Films
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Multifunctional Underwater Adhesive Film Enabled by a Single-Component Poly(ionic liquid).

Binmin Wang1, Chenyu Qiao2, Yong-Lei Wang3,4

  • 1Key Laboratory of Functional Polymer Materials (Ministry of Education), Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.

ACS Nano
|March 17, 2023
PubMed
Summary

A novel poly(ionic liquid) (PIL) demonstrates strong underwater adhesion and impressive sound absorption. This versatile synthetic wet adhesive offers robust performance on various surfaces, overcoming key material challenges.

Keywords:
hierarchical porous architectureinterfacial interaction mechanismnon-covalent interactionspoly(ionic liquid)underwater adhesion

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Surface Chemistry

Background:

  • Developing synthetic wet adhesives for real-world applications faces challenges in cost, robustness, and multifunctionality.
  • Existing wet adhesives often struggle with performance degradation in aqueous environments.

Purpose of the Study:

  • To develop a low-cost, robust, and multifunctional wet adhesive material.
  • To investigate the underwater adhesion capabilities and mechanisms of a single-component poly(ionic liquid) (PIL).

Main Methods:

  • Fabrication of a single-component poly(ionic liquid) (PIL) adhesive film.
  • Surface force measurements to quantify adhesion on diverse substrates in aqueous media.
  • Analysis of adhesion mechanisms through non-covalent interaction studies.
  • Evaluation of underwater sound absorption properties.

Main Results:

  • The PIL adhesive film exhibited fast (∼30 s) and robust underwater adhesion (56.7 mN·m⁻¹) on both hydrophilic and hydrophobic substrates.
  • Adhesion was attributed to a synergistic combination of hydrogen bonding, cation-π, electrostatic, and van der Waals interactions.
  • The PIL film demonstrated significant underwater sound absorption (0.80–0.92 coefficient for 4–30 kHz sound waves).

Conclusions:

  • A multifunctional poly(ionic liquid) wet adhesive was successfully developed.
  • The PIL exhibits excellent stretchability, flexibility, and adhesion under challenging wet conditions.
  • This research provides insights into wet adhesion mechanisms and highlights the potential of PILs in diverse applications, including sound absorption.