Abstract

Low-molecular-weight adhesives (LMWAs) possess many unique features compared to polymer adhesives. However, fabricating LMWAs with adhesion strengths higher than those of polymeric materials is a significant challenge, mainly because of the relatively weak and unbalanced cohesion and interfacial adhesion. Herein, an ionic liquid (IL)-based adhesive with high adhesion strength is demonstrated by introducing an IL moiety into a Y-shaped molecule replete with hydrogen bonding (H-bonding) interactions. The IL moieties not only destroyed the rigid and ordered H-bonding networks, releasing more free groups to form hydrogen bonds (H-bonds) at the substrate/adhesive interface, but also provided electrostatic interactions that improved the cohesion energy. The synthesized IL-based adhesive, Tri-HT, could directly form thin coatings on various substrates, with high adhesion strengths of up to 12.20 MPa. Advanced adhesives with electrical conductivity, self-healing behavior, and electrically-controlled adhesion could also be fabricated by combining Tri-HT with carbon nanotubes.

Low-molecular-weight adhesives (LMWAs) possess many unique features compared to polymer adhesives but fabrication of LMWAs with adhesion strengths higher exceeding those of polymeric materials is a significant challenge. Here, the authors propose an ionic liquid based thin coating adhesive with high adhesion strength.

Details

Title
Small-molecule ionic liquid-based adhesive with strong room-temperature adhesion promoted by electrostatic interaction
Author
Zhang, Jun 1 ; Wang, Wenxiang 1 ; Zhang, Yan 1 ; Wei, Qiang 1 ; Han, Fei 1 ; Dong, Shengyi 2 ; Liu, Dongqing 3   VIAFID ORCID Logo  ; Zhang, Shiguo 1   VIAFID ORCID Logo 

1  Hunan University, College of Materials Science and Engineering, Changsha, China (GRID:grid.67293.39) 
2  Hunan University, College of Chemistry and Chemical Engineering, Changsha, China (GRID:grid.67293.39) 
3  National University of Defense Technology, Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, Changsha, China (GRID:grid.412110.7) (ISNI:0000 0000 9548 2110) 
Publication year
2022
Publication date
2022
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41467-022-32997-4
ProQuest document ID
2709801942
Copyright
© The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.