In Situ Synthesis of Imidazolium‐Crosslinked Ionogels via Debus–Radziszewski Reaction Based on PAMAM Dendrimers in Imidazolium Ionic liquid

Abstract

This study reports a remarkably facile method to synthesize novel ionogels with imidazolium cycle crosslinks based on polyamidoamine (PAMAM) dendrimers via one-pot, modified Debus-Radziszewski reaction in ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]). High room temperature ionic conductivity (up to 6.8 mS cm ) is achieved, and more remarkably, it can still exceed 1 mS cm when the dendrimer content reached 70% because PAMAM dendrimers are completely amorphous with many cavities and the newly formed imidazolium crosslinks contains ions. The elastic modulus of these ionogels can exceed 10 Pa due to the newly-formed rigid imidazolium crosslinks. Crucially, these ionogels are robust gels even at temperatures up to 160 °C. Such novel ionogels with high ionic conductivity, tunable modulus, and flexibility are desirable for use in high-temperature flexible electrochemical devices.

Novel Chemical Cross-Linked Ionogel Based on Acrylate Terminated Hyperbranched Polymer with Superior Ionic Conductivity for High Performance Lithium-Ion Batteries

“…Highly branched polymers, as one of the fastest growing polymers in function macromolecular materials, have captured more and more attention because of their unique structural characteristics and properties such as low crystallinity, controlled flexibility, and various functionalities [27,28,29,30,31,32,33,34]. Hyperbranched polymers (HPs), a unique class of branched polymer with a large number of terminal groups, have been used as hot hosts for use in ion-conductive polymer electrolytes due to their completely amorphous and low glass transition temperatures [35,36,37,38,39].…”

Stretchable, self-healable, and reprocessable chemical cross-linked ionogels electrolytes based on gelatin for flexible supercapacitors

“…For neat gelatin, the characteristic bands of C=O vibration for Amide I display at 1635 cm -1 , and Amide III is present at 1233 cm -1 [47]. As for the xerogel, the distinct band corresponding to -NH 2 groups at 3277 cm -1 displays an obvious decrease as compared to neat gelatin, indicating the Schiff base reaction between aldehyde and amino group [39]. Moreover, the strong peak at 1625 cm -1 is assigned to overlap of the C=N vibration with C=O vibration of cross-linked gelatin.…”

“…Ionogels are regarded as one of the most promising next-generation GPE materials and have received considerable attention owing to their attractive properties such as safety, nonflammability, high thermal stability, and wider electrochemical windows [31][32][33][34][35][36][37]. According to the matrix structure, ionogels can be classified into synthetic polymerbased ionogel and biopolymer-based ionogel [38][39][40][41][42][43]. Compared with synthetic polymer-based ionogel, biopolymer (cellulose, guar gum, agarose, gelatin, DNA, etc.…”

Estimating the Solubility, Solution Thermodynamics, and Molecular Interaction of Aliskiren Hemifumarate in Alkylimidazolium Based Ionic Liquids

“…It has many unique physicochemical properties in comparison to traditional solvents and therefore emerged as a multifunctional solvent for pharmaceutical and biomedical applications [6,7,8,9]. It exhibits very low/or negligible vapor pressure, low melting point with a wide liquidity range, a high thermal, chemical & electrochemical stabilities, unique solvating properties with excellent dissolution performance [10,11,12]. In addition, it has adjustable solvent viscosity, polarity, and hydrophobicity associated with low or high water miscibility which results from a matchless association of molecular characteristics of their constitutive ions [7,8].…”