Water‐Triggered Spontaneously Solidified Adhesive: From Instant and Strong Underwater Adhesion to In Situ Signal Transmission

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  • Si Yu Zheng
    College of Materials Science & Engineering Zhejiang University of Technology Hangzhou 310014 China
  • Jiahui Zhou
    College of Materials Science & Engineering Zhejiang University of Technology Hangzhou 310014 China
  • Shuaibing Wang
    College of Materials Science & Engineering Zhejiang University of Technology Hangzhou 310014 China
  • Yan‐Jie Wang
    School of Materials Science and Engineering Tiangong University Tianjin 300387 China
  • Shanqiu Liu
    College of Materials Science & Engineering Zhejiang University of Technology Hangzhou 310014 China
  • Guangyan Du
    College of Materials Science & Engineering Zhejiang University of Technology Hangzhou 310014 China
  • Dong Zhang
    Department of Chemical, Biomolecular, and Corrosion Engineering The University of Akron Akron OH 44325 USA
  • Jimin Fu
    Research Institute for Intelligent Wearable Systems School of Fashion and Textiles The Hong Kong Polytechnic University Hong Kong SAR 999077 China
  • Ji Lin
    Piezoelectric Device Laboratory School of Mechanical Engineering & Mechanics Ningbo University Ningbo 315211 China
  • Zi Liang Wu
    Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
  • Qiang Zheng
    Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
  • Jintao Yang
    College of Materials Science & Engineering Zhejiang University of Technology Hangzhou 310014 China

説明

<jats:p>Developing conductive underwater glue for fast sealing and in situ monitoring is critical for ocean exploration yet remains a challenge. The fluidity of glue is a double‐edged sword that is favorable for molecule spreading and formation of interlocking bonding network yet also leads to leakage of conductive ions. Herein, a polymeric glue possessing good conductivity and exhibiting rapid, strong, and long‐lasting underwater adhesion on diverse substrates at various harsh environments and extreme temperatures is developed. For molecular design, the nitrogen heterocyclic motif that prevails in biomolecular recognition is encoded with water‐resistant benzene block in one pendant group to serve as underwater binding sites; ionic liquids (ILs) of [EMIM][BF4] is employed as the solvent for fast water exchange that triggers rapid adhesion. Simultaneously, the polymer‐IL interaction is regulated, with the assistance of the theoretical calculations, to retain sufficient ILs within the adhesive for sensing. Finally, the glue is applied for underwater sealing and in situ monitoring various physical signals, while the fluorescent property is utilized for underwater labeling. This study should provide a new design strategy for the next‐generation of multifunctional underwater adhesives and promote their applications.</jats:p>

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