Zwitterion‐Initiated Spontaneously Polymerized Super Adhesive Showing Real‐Time Deployable and Long‐Term High‐Strength Adhesion against Various Harsh Environments

Abstract

Real-time deployment of adhesives and achieving long-term and highstrength adhesion in various harsh environments remains a significant challenge both in the engineering field and daily life. Herein, the authors report the construction of a super adhesive based on an entirely new mechanism of zwitterion-initiated polymerization. This adhesive can be formed quickly by the rapid spontaneous polymerization of 4-aminostyrene (4-AS) in the presence of acidic polyanion aqueous solution initiated by zwitterions. Direct adhesion and curing process of the adhesive is independent of the environment, and it can be completely cured within 20 min to strongly glue diverse materials spanning from plastics to inorganic substances and metal in various environments (water, acid, alkali, seawater, oil, organic solvent, and low temperature), supposedly due to their marvelous ability to repel the surface liquid barrier layer and form multiple interactions with adherend. Remarkably, this adhesive can maintain high-strength and long-term adhesion to different materials surfaces, quickly repairing broken containers in various conditions. The zwitterion-initiated spontaneous polymerization provides a new strategy for constructing an eco-benign highstrength adhesive with an ability to bond a wide variety of materials with long-term stability against various severe environments.

Tough, Instant, and Repeatable Adhesion of Self‐Healable Elastomers to Diverse Soft and Hard Surfaces

“…[ 19 , 20 ] However, achieving tough adhesion often comes at the expense of recyclability. [ 21 ] That is, tough adhesion is usually permanent, [ 22 , 23 , 24 ] and the elastomers can never be removed even when the devices reach their lifespan. Currently, a central challenge for elastomer adhesives is to combine reusability and tough adhesion, which allows environmental‐friendly recycling of devices without hampering their proper functioning during use.…”

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

“…This is similar to the mechanism of ice adhesion as reported in the literature. 32 By contrast, other supramolecular adhesives generally exhibit deteriorating adhesion performance at low temperatures compared with their room-temperature performance, [49][50][51] which may be due to the cold brittleness of their dry-network structures at ultra-low temperatures. Moreover, the C 12 TAB/ChCl-urea eutectogel adhesive also demonstrated outstanding extreme temperature-resistant adhesion performance.…”

Bio‐Inspired Self‐Hydrophobized Sericin Adhesive with Tough Underwater Adhesion Enables Wound Healing and Fluid Leakage Sealing

“…The hydration layer induced by interfacial water (i.e., body fluid) is the main reason preventing the formation of strong and durable bonds between adhesives and tissue surface. [ 18–25 ] Therefore, repelling water away from the interfaces and increasing interfacial interactions are critical for effectively developing underwater adhesives. Recently, non‐covalent interactions (such as electrostatic, [ 26–29 ] hydrogen bonding, [ 30–32 ] and host–guest interactions [ 33 ] ) and micro/nano‐structured modification [ 34–37 ] strategies have been employed to destroy the hydration layer and enhance underwater adhesion affinity.…”