A Superstrong and Reversible Ionic Crystal‐Based Adhesive Inspired by Ice Adhesion

Abstract

In this study,w ed eveloped as uperstrong and reversible adhesive,whichcan possess ahigh bonding strength in the "adhesive" state and detach with the application of heating.A ni onic crystal (IC) gel, in whicha nI Cw as immobilized within as oft-polymer matrix, were synthesized via in situ photo-crosslinking of aprecursor solution composed of N, N-dimethyl acrylamide (DMAA) and am elted IC.T he obtained IC gel is homogenous and transparent at melt point. When cooled to the phase transition temperature of the IC,the gel turns into the adhesive with the adhesion strength of 5.82 MPa(on glasses), due to the excellent wetting of melted gel and at hin layer of crystalline IC with high cohesive strength formed on the substrates.T he synergistic effects between IC, polymer networks and substrates were investigated by solid state 1 HNMR and molecular dynamics simulation. Sucha n adhesive layer is reversable and can be detached by heating and subsequent re-adhesion via cooling. This study proposed the new design of removable adhesives,w hich can be used in dynamic and complex environments.

Robust and High-Temperature-Resistant Nanofiber Membrane Separators for Li–Metal, Li–Sulfur, and Aqueous Li-Ion Batteries

“…The tensile strength of TPT-PAN nanofibers is 3.2 MPa, while the CEN nanofibers exhibit a much higher tensile strength of 18.8 MPa. The Young’s modulus of the CEN separator can be determined from the tensile test data . As shown in Figure S2, the modulus of the TPT-PAN nanofibers increases from 0.61 to 100 MPa after cross-linking.…”

Poly(ionic liquid)‐Based Energy and Electronic Devices

“…Initiated by the reversible adhesion phenomena of ice/melting, we developed a reversible adhesive ionic crystal (IC) gel, which was prepared by in situ photo‐ crosslinking a precursor consisting of N , N ‐dimethylarylamide (DMAA) and an imidazolium IC. [ 62 ] The IC gel exhibited a high adhesive strength on many substrates upon cooling below the melting temperature of the IC. The adhesive layer can be detached upon heating and re‐adhesion via cooling.…”

Moisture‐Wicking, Breathable, and Intrinsically Antibacterial Electronic Skin Based on Dual‐Gradient Poly(ionic liquid) Nanofiber Membranes

“…[9][10][11][12][13][14] However, most flexible electronic skins with hexafluorophosphate (PF 6 − ), PILs may be converted from hydrophilic to hydrophobic. [49,50] In addition, the PILs can interact with the negatively charged bacterial surface, allowing hydrophobic chain segments (such as alkyl chains) to enter into the bacterial lipid membrane, resulting in the bacterium collapsing, breaking, and dying. As a result, they exhibit a broad spectrum of antibacterial characteristics and have been extensively investigated as antimicrobial materials.…”