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Self‐Healing Micellar Ion Gels Based on Multiple Hydrogen Bonding
Author(s) -
Tamate Ryota,
Hashimoto Kei,
Horii Tatsuhiro,
Hirasawa Manabu,
Li Xiang,
Shibayama Mitsuhiro,
Watanabe Masayoshi
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201802792
Subject(s) - materials science , copolymer , hydrogen bond , self healing hydrogels , micelle , chemical engineering , polymer , self healing , ionic liquid , self assembly , context (archaeology) , supramolecular chemistry , ion , electrolyte , ionic bonding , polymer chemistry , aqueous solution , composite material , nanotechnology , organic chemistry , molecule , chemistry , electrode , alternative medicine , pathology , engineering , medicine , biology , paleontology , catalysis
Ion gels, composed of macromolecular networks filled by ionic liquids (ILs), are promising candidate soft solid electrolytes for use in wearable/flexible electronic devices. In this context, the introduction of a self‐healing function would significantly improve the long‐term durability of ion gels subject to mechanical loading. Nevertheless, compared to hydrogels and organogels, the self‐healing of ion gels has barely investigated been because of there being insufficient understanding of the interactions between polymers and ILs. Herein, a new class of supramolecular micellar ion gel composed of a diblock copolymer and a hydrophobic IL, which exhibits self‐healing at room temperature, is presented. The diblock copolymer has an IL‐phobic block and a hydrogen‐bonding block with hydrogen‐bond‐accepting and donating units. By combining the IL and the diblock copolymer, micellar ion gels are prepared in which the IL phobic blocks form a jammed micelle core, whereas coronal chains interact with each other via multiple hydrogen bonds. These hydrogen bonds between the coronal chains in the IL endow the ion gel with a high level of mechanical strength as well as rapid self‐healing at room temperature without the need for any external stimuli such as light or elevated temperatures.