Adhering Low Surface Energy Materials without Surface Pretreatment via Ion–Dipole Interactions

Abstract

Low surface energy materials resist adhesion due to their chemical inertness and non-wetting properties. Herein, we report the creation of a transparent ionogel adhesive that uses ion−dipole interactions to achieve a higher bonding performance to polytetrafluoroethylene (PTFE) relative to most commercial glues. The ionogel adhesive is composed of a poly(hexafluorobutyl acrylate-co-methyl methacrylate) random copolymer and a hydrophobic ionic liquid. The prepared ionogel can adhere to various hydrophobic substrates, such as PTFE, polypropylene, and polyethylene, as well as hydrophilic glass, ceramics, and steel. The design strategy and adhesion behavior are well interpreted using the density functional theory calculations and molecular dynamics simulations. The straightforward ultravioletcuring method, high optical clarity, versatile adhesion ability, and reversible adhesion capabilities make this high-performance adhesive a promising product for commercialization.

Switchable Adhesion: On‐Demand Bonding and Debonding

“…studied the relationship between the chemical structure and viscosity of the supramolecular polymeric adhesive. [ 63 ] Li and co‐workers calculated the combined Gibbs free energy of their adhesives and glass, which confirmed their adhesion mechanism. [ 70 ] DFT was used to evaluate the binding energy between the adhesive and adherends (Figure 3C ).…”

“…Reproduced with permission. [ 63 ] Copyright 2021, American Chemical Society. D) Molecule dynamic stimulations of the adhesion process.…”

Highly Transparent, Self-Healing, and Self-Adhesive Double Network Hydrogel for Wearable Sensors

“…The ADN hydrogel exhibited the ability of self-healing due to its dynamic crosslinking (Chen G. et al, 2021;Huang et al, 2021). As shown in Figure 4A, the ADN 1.5 hydrogel was cut in half with a razor blade and then reassembled.…”

“…This hydrogel was synthesized by an alginate network physically cross-linked by calcium ions and interpenetrating copolymers consisting of anionic monomer sodium p-styrene sulfonate (NAS) and cationic monomer acryloxyethyl trimethyl ammonium chloride (DAC) (Figure 1). The reversible physical cross-link brought advantages such as energy dissipation, super elasticity, and adaptive self-adhesion due to the ion dipole or dipole-dipole interaction created by strong dipolar zwitterionic units (Huang et al, 2021;Mirzaei et al, 2021). The obtained hydrogels were denoted as ADN, where A refers to sodium alginate, D refers to DAC, N refers to NAS.…”

Highly transparent, self-healing and adhesive wearable ionogel as strain and temperature sensor

“…Some I-skins exhibit excellent interfacial adhesion to substrates, containing organic and inorganic materials, by molecular interactions between the I-skins and the substrates. [30][31][32][33][34] Meanwhile, high stretchability and suitable strength are imperative for I-skins. I-skins with excessively low mechanical strength tend to be limited in practical applications and suffer mechanical damage, which reduces their life as reliable sensors.…”