A highly transparent ionogel with strength enhancement ability for robust bonding in an aquatic environment

Abstract

The underwater adhesive with strong, fast and stable adhesion ability has become an urgent requirement for various industrial applications. Herein, a highly transparent ionogel based on fluorine-rich poly(ionic liquid) and...

Hydrogel adhesive formed via multiple chemical interactions: from persistent wet adhesion to rapid hemostasis

“…3 Existing challenges include the destruction of the hydration layer, the contradiction between the excellent interface adaptability and tough mechanical strength of the hydrogel, and the decrease in adhesion capacity over time dominated by the high swelling properties of the hydrogel. 4,5 Several strategies have been developed to eliminate the barriers of the hydration layer on the surface of the adhesive matrix, such as the construction of chemical bonding between the surface of the hydrogel and the substrate, 6 introducing hydrophobic groups into the hydrogel, 7,8 and rapidly absorbing interfacial water through the dry polymer network of the hydrogel. 9 In order to take advantage of the interface adaptability and the mechanical property for superior persistent adhesion capability, hydrogels with loose polymer chains are usually first applied, and then a denser polymer network is formed by exposure to external environmental stimuli (e.g., UV light, 4 temperature 10 and water molecules 11 ).…”

“…4,5 Several strategies have been developed to eliminate the barriers of the hydration layer on the surface of the adhesive matrix, such as the construction of chemical bonding between the surface of the hydrogel and the substrate, 6 introducing hydrophobic groups into the hydrogel, 7,8 and rapidly absorbing interfacial water through the dry polymer network of the hydrogel. 9 In order to take advantage of the interface adaptability and the mechanical property for superior persistent adhesion capability, hydrogels with loose polymer chains are usually first applied, and then a denser polymer network is formed by exposure to external environmental stimuli (e.g., UV light, 4 temperature 10 and water molecules 11 ). Nevertheless, the construction and application of hydrogel adhesives that can simultaneously address the abovementioned challenges to achieve robust and persistent adhesion in physiological environments are still rarely reported.…”

A Transparent, Highly Stretchable, Solvent‐Resistant, Recyclable Multifunctional Ionogel with Underwater Self‐Healing and Adhesion for Reliable Strain Sensors

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applications, including solid electrolytes, [7] energy storage/generation devices, [8][9][10] electroactive actuators, [11] strain sensors, [12,13] soft robotics, [14] stretchable touch panels, [15] membrane separation, [16] and so on.To further expand the applications of ionogels, different strategies have been reported to combine various other desirable properties with ionogels, including self-healing capability, [17][18][19] high mechanical strength and resilience, [20,21] resistance against water and organic solvents, [22,23] and self-adhesiveness. [12,24] The integration of different properties with the highly conductive and stable nature of ionogels is essential to meet the requirements for practical applications in complex scenarios. For example, very recently, Wu et al reported a class of ionogels with underwater self-healing ability and underwater adhesiveness, which demonstrated intriguing applications such as underwater communication.

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“…To further expand the applications of ionogels, different strategies have been reported to combine various other desirable properties with ionogels, including self-healing capability, [17][18][19] high mechanical strength and resilience, [20,21] resistance against water and organic solvents, [22,23] and self-adhesiveness. [12,24] The integration of different properties with the highly conductive and stable nature of ionogels is essential to meet the requirements for practical applications in complex scenarios. For example, very recently, Wu et al reported a class of ionogels with underwater self-healing ability and underwater adhesiveness, which demonstrated intriguing applications such as underwater communication.…”

Atmospheric Hygroscopic Ionogels with Dynamically Stable Cooling Interfaces Enable a Durable Thermoelectric Performance Enhancement

“…Owing to the introduction of [EMIM][Ac], the RIG demonstrated a large amount of exposed bondable sites on its surface. It can bond with different adherends through diverse supramolecular interactions, including hydrogen bonds, electrostatic, ion-dipole, coordination, and hydrophobic interactions [38][39][40][41] (Figure 3a). In detail, for the hydrophilic substrates surface, the hydrogen bonds, electrostatic, and coordination may account for the stable interaction.…”