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Showing 1–4 of 4 results
Advanced filters: Author: Keiichi Imato Clear advanced filters

  • Control over mechanochemical polymer scission by external stimuli may offer an avenue to further advance the fields of polymer chemistry, mechanochemistry, and materials science. Here the authors show light regulating the mechanochemical behavior of a diarylethene-conjugated Diels–Alder adduct.

    • Jumpei Kida
    • Keiichi Imato
    • Hideyuki Otsuka
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-6

  • Photoinduced transitions between the solid, glass, and liquid states based on molecular photoswitches promise an enormous variety of applications, such as photoswitchable adhesives, which contribute to material recycling for a sustainable future in the era of composite materials. In this review, we highlight recent progress in the photoinduced transitions of small molecules and polymers and systematically discuss the molecular designs, mechanisms, applications, merits and demerits, and future challenges in each photoswitch and the whole field.

    • Keiichi Imato
    • Naoki Kaneda
    • Yousuke Ooyama
    ReviewsOpen Access
    Polymer Journal
    Volume: 56, P: 269-282

  • Self-healable and cell-compatible polyurethane elastomers cross-linked by charge-transfer complexes between electron-rich pyrene (Py) and electron-deficient naphthalene diimide (NDI) were fabricated by simply blending two linear polymers with Py or NDI as a repeating unit. The elastomers with different blend ratios self-healed damage over 1 day in mild conditions, including in air and water at 30–100 °C. The good cell compatibility of the polyurethane elastomers was demonstrated by culturing two kinds of cells on the thin film substrates.

    • Keiichi Imato
    • Hidekazu Nakajima
    • Naoya Takeda
    Research
    Polymer Journal
    Volume: 53, P: 355-362

  • Functional dyes offer fascinating properties in response to external stimuli and enable unique stimuli-responsive functions in materials by chemical incorporation into polymers. In this review, we highlight our recent studies conducted in the last half decade on stimuli-responsive smart polymers and polymeric materials offering, for example, switchable adhesion, mechanical actuation, and chemical sensing based on functional dyes that are chemically incorporated into the structures, with a particular focus on the stimuli of light, force, electric fields, and chemicals including water.

    • Keiichi Imato
    • Yousuke Ooyama
    ReviewsOpen Access
    Polymer Journal
    Volume: 56, P: 1093-1109