Physicochemical Characterization of a Photoinduced Sol–Gel Transition of an Azobenzene-Containing ABA Triblock Copolymer/Ionic Liquid System

  title={Physicochemical Characterization of a Photoinduced Sol–Gel Transition of an Azobenzene-Containing ABA Triblock Copolymer/Ionic Liquid System},
  author={Xiaofeng Ma and Ryoji Usui and Yuzo Kitazawa and Ryota Tamate and Hisashi Kokubo and Masayoshi Watanabe},
We have previously reported that an ABA triblock copolymer with poly(ethylene oxide) as the B block and a thermo-/photoresponsive random copolymer of 4-phenylazophenyl methacrylate (AzoMA) and N-isopropylacrylamide (NIPAm) (P(AzoMA-r-NIPAm)) as the A block exhibited a reversible photoinduced sol–gel transition in a hydrophobic ionic liquid. Such reversible sol–gel transitions can be used to realize photohealable ion gels. This study contributes to a deeper physicochemical understanding of the… Expand
9 Citations
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This study provides a promising strategy to control the rheological properties of nonvolatile soft materials via contactless light irradiation that could be exploited in various applications such as photoresponsive soft actuators and photo-healable soft materials. Expand
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Recent progress in self-healable ion gels
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Comparison of interactions between aluminium hydride oxide surfaces and three energetic plasticizers: DFT calculations
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Healable soft materials based on ionic liquids and block copolymer self-assembly
Ion gels, which are macromolecular networks filled with ionic liquids, are attracting significant interest owing to their unique physicochemical properties such as their nonflammability, negligiblyExpand


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The reversible micellization and sol-gel transition of block copolymer solutions in an ionic liquid (IL) triggered by a photostimulus is described and reversible association/fragmentation of the polymer network resulting from the phototriggered self-assembly of the ABA triblockcopolymer is described. Expand
Thermally Reversible Ion Gels with Photohealing Properties Based on Triblock Copolymer Self-Assembly
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We report the reversible photoinduced self-assembly of a diblock copolymer in a typical hydrophobic ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim]PF6). A series of randomExpand
Photo-healable ion gel with improved mechanical properties using a tetra-arm diblock copolymer containing azobenzene groups
Abstract Photo-healable ion gels with improved mechanical properties are demonstrated using a tetra-arm diblock copolymer (A(B)4) containing azobenzene groups. Physical ion gels were prepared byExpand
Thermoreversible high-temperature gelation of an ionic liquid with poly(benzyl methacrylate-b-methyl methacrylate-b-benzyl methacrylate) triblock copolymer
In this paper, we describe a novel thermosensitive triblock copolymer in an ionic liquid (IL) that shows a low-temperature-sol–high-temperature-gel transition. A well-defined ABA triblock copolymerExpand
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Photoisomerization-induced tunable LCST phase separation of azobenzene-containing polymers in an ionic liquid.
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Polymer Actuators Using Ion-Gel Electrolytes Prepared by Self-Assembly of ABA-Triblock Copolymers
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