Low-molecular-weight supramolecular adhesives based on non-covalent self-assembly of a small molecular gelator

Abstract

Currently developed adhesives are overwhelming polymeric in nature. Herein, we highlight for the first time the potential of supramolecular eutectogels assembled from small molecules as robust low-molecular-weight (LMW) supramolecular adhesives...

Interfacial Instability‐Induced (3I) Adhesives through “Mediator” Solvent Diffusion for Robust Underoil Adhesion

“…Intriguingly, based on the same design principle of interfacial instability‐induced liquid replacement, we can realize effective adhesion in different kinds of organic solvents by simply exchanging the type of “mediator” solvents in the original 3I adhesive system, and replacing water‐soluble adhesive polymers with alkane‐soluble polydimethylsiloxane (PDMS) (Supporting Information). Compared with most commercial adhesives that lose efficiency in organic solvents, [ 10 ] the PDMS‐based enhanced 3I adhesive exhibits a compelling adhesion strength of 61.3 ± 17.2 kPa in methanol, 51.8 ± 16.9 kPa in ethanol, 48.4 ± 14.0 kPa in acetic acid, 48.8 ± 14.0 kPa in isopropanol, 64.0 ± 19.7 kPa in acetone and 25.0 ± 4.7 kPa in THF (Figure 4d). To illustrate the excellent adhesion performance of enhanced 3I adhesives in different environments, we made a round hole (diameter = 1.2 cm) on a 1 L glass bottle and poured oil ( n ‐decane, dyed light blue) inside.…”

“…[ 7 ] However, most underwater adhesives unfortunately lose efficiency under oil except for a few attempts such as adhesive tapes/melts based on specific structure, [ 2a,8 ] nucleobase‐tackified copolymers, [ 9 ] and supramolecular eutectogels. [ 10 ] The stagnant development of underoil adhesives may be attributed to the lack of in‐depth exploration and a clear cognition on the underlying mechanism of underoil adhesion from the sight of liquid‐liquid‐solid interface.…”

Self-Healing Hydrogels: From Synthesis to Multiple Applications

“…(B) SP-DN eutectic gel actuator with excellent bidirectional detection capability (two perpendicular directions) and detection of irregular surfaces (complex muscle movements). Reproduced with permission from ref . Copyright 2022 Royal Society of Chemistry.…”

Natural-silk-inspired design provides ultra-tough biobased structural adhesives with supercold tolerance

“…High elasticity is mainly derived from its higher chain exibility and lower intermolecular hindrance, in which the glass transition temperature (T g ) is reduced, thereby enabling the polymeric structure with a wide range of service temperatures. 19,20 From this point of view, employment of typical dynamic motifs with supramolecular interactions (e.g., H-bonds (H-bonds), [21][22][23] ionic interactions, [24][25][26] metal coordination, 27,28 and host-guest interactions 29,30 ) as reversible cross-links to control the dynamic interfacial adhesion behavior is a mainstream strategy, further improving adhesion performance under various extreme conditions. It is reasonable that the realization of lowtemperature tolerant adhesion behaviors in these supramolecular polymer systems is crucially dependent on the cohesive polymeric structures and segmental motions.…”