Viscoelastic change of block copolymer ion gels in a photo-switchable azobenzene ionic liquid triggered by light

Caihong Wang; Kei Hashimoto; Ryota Tamate; Hisashi Kokubo; Ken Morishima; Xiang Li; Mitsuhiro Shibayama; Fengniu Lu; Takashi Nakanishi; Masayoshi Watanabe

doi:10.1039/C8CC08203K

Viscoelastic change of block copolymer ion gels in a photo-switchable azobenzene ionic liquid triggered by light†

Caihong Wang,‡^ab Kei Hashimoto,

‡^b Ryota Tamate,

^b Hisashi Kokubo,

^b Ken Morishima,^c Xiang Li,

^d Mitsuhiro Shibayama,

^d Fengniu Lu,

^e Takashi Nakanishi

^e and Masayoshi Watanabe

*^b

Author affiliations

* Corresponding authors

^a Department of Chemical Machinery and Control Engineering, School of Chemical Engineering, Sichuan University, Sichuan 610065, China

^b Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
E-mail: mwatanab@ynu.ac.jp

^c Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan

^d Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan

^e International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan

Abstract

A photo-switchable ionic liquid solvent bearing an azobenzene moiety induced a viscoelastic change of block copolymer ion gels by light. ABA triblock copolymers having poly(phenethyl methacrylate) and poly(benzyl methacrylate) as A blocks exhibited opposite photoinduced rheological responses although they had only a tiny structural difference in the alkyl chain length.

Chemical Communications

Viscoelastic change of block copolymer ion gels in a photo-switchable azobenzene ionic liquid triggered by light†

Abstract

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Viscoelastic change of block copolymer ion gels in a photo-switchable azobenzene ionic liquid triggered by light

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