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In Situ Synthesis of Imidazolium‐Crosslinked Ionogels via Debus–Radziszewski Reaction Based on PAMAM Dendrimers in Imidazolium Ionic liquid
Author(s) -
Zhao Xiaomeng,
Guo Shufei,
Li Hao,
Liu Jiahang,
Liu Xinxin,
Song Hongzan
Publication year - 2017
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201700415
Subject(s) - ionic liquid , dendrimer , materials science , ionic conductivity , chemical engineering , amorphous solid , polymer chemistry , electrochemistry , conductivity , ionic bonding , ion , organic chemistry , electrode , chemistry , catalysis , engineering , electrolyte
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 −1 ) is achieved, and more remarkably, it can still exceed 1 mS cm −1 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 6 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.