An ultra-tough and super-stretchable ionogel with multi functions towards flexible iontronics

Abstract

Ionogels have attracted much attention in recent years because of their good thermal stability, high ionic conductivity, and non-volatility. However, there is a trade-off between the mechanical strength and stretchability of ionogels, which results in unsatisfactory mechanical performance. Herein, strong polymer crystallization and weak ion-dipole interaction are combined to prepare an ultra-tough and superstretchable ionogel. The crystalline region can dissipate the energy through the stress-induced disaggregation mechanism in the stretching process and toughen the gel, while the reversible formation and dissociation of the ion-dipole interaction between amorphous polymer chains and ionic liquids can provide elasticity for large strain. These ionogels have high toughness, strong tensile strength, large Young's modulus, and good stretchability. Furthermore, the ionogels also possess other properties like good fatigue resistance, quick selfrecovery, high transparency, recyclability, self-healing ability, high ionic conductivity, and wide electrochemical window. This ionogel exhibits great potential in several iontronic devices, such as triboelectric nanogenerators, ionic thermoelectric materials, and strain sensors. This study develops a new method to guide the preparation of high-performance ionogels by combining reversible strong and weak interactions.

Curcumin-Based Ionic Liquid Hydrogel for Topical Transdermal Delivery of Curcumin To Improve Its Therapeutic Effect on the Psoriasis Mouse Model

“…With the increase of Cur-Car-IL content, the tensile strength and Young's modulus of the hydrogel gradually increase, while the elongation at break decreases (Figure 1k). 6,7,37 These results indicated that the Cur-Car-IL@Ilo hydrogel has good stability, sustained release, and mechanical properties, which have potential application value for the drug delivery carrier of psoriasis. the on-demand release of drugs from hydrogel and the penetration of drugs on the skin (Figure 2a).…”

“…The addition of 10 wt % Cur-Car-IL has no significant effect on the modulus of hydrogel (Figure j). With the increase of Cur-Car-IL content, the tensile strength and Young’s modulus of the hydrogel gradually increase, while the elongation at break decreases (Figure k). ,, These results indicated that the Cur-Car-IL@Ilo hydrogel has good stability, sustained release, and mechanical properties, which have potential application value for the drug delivery carrier of psoriasis.…”

“…Hydrogel is a three-dimensional network structure system formed by polymer with hydrophilic groups . It has injectability, excellent hydrophilicity, good biocompatibility, and biodegradability, and has attracted increasing attention in many fields such as drug delivery, and textile engineering. − The cross-linking methods of polymers to form a gel include chemical cross-linking and physical cross-linking. Chemical cross-linking is to form new covalent bonds between polymer chains, while physical cross-linking is to form gel through noncovalent bonds, including ionic bonds, hydrogen bonds, crystallization, and entanglement between chains .…”

Exceptional n-type thermoelectric ionogels enabled by metal coordination and ion-selective association

“…(F) Power factors of PEO/LiTFSI 50% -EmimBF 4 ionogels. (G) Comparison of S i and σ i of PEO/LiTFSI 50% -0.6EmimBF 4 ionogel in this work with previously reported n-type ionogels(9,10,15,16,26,27). Data at the RH of 50 or 60% are taken.…”

Encounter between Gyroid and Lamellae in Janus Colloidal Particles Self‐Assembled by a Rod–Coil Block Copolymer

“…[4][5][6] To date, different structures self-assembled by different BCPs have been widely researched under different conditions, accompanied by the rapid development of various applications, such as cancer therapy, bioimaging, solid surfactants, sensors, etc. [7][8][9][10][11][12] The structure of Janus particles with DOI: 10.1002/marc.202300696 an asymmetric heterostructural junction is different from symmetric or homogenous structures. Generally, the Janus particle is composed of two halves with different properties, such as discs, rods, spheres, and mushrooms.…”