Highly Transparent and Tough Filler Composite Elastomer Inspired by the Cornea

Kenta Watanabe, Eiji Miwa, Fumio Asai, Takahiro Seki, Kenji Urayama, Tomotaka Nakatani, So Fujinami, Taiki Hoshino, Masaki Takata, Chang Liu, Koichi Mayumi, Kohzo Ito, Yukikazu Takeoka

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)


    We propose a strategy to develop a colorless, transparent, and tough composite elastomer inspired by the cornea, which is the transparent front portion of the eyeball. The composite elastomer, in which 34 vol »% hard silica particles with a uniform particle size are dispersed as a filler in a low-crosslinking polymer network exhibits a fracture energy that is ∼13.5 times higher than that of a system without the silica particles. This strategy also makes the elastomer optically transparent, because the light scattered by each silica particle that forms an ordered structure in the polymer network is cancelled by interference. This research may pave the way for the development of optically transparent and durable materials for applications such as advanced medical devices and soft robots.

    Original languageEnglish
    Pages (from-to)325-330
    Number of pages6
    JournalACS Materials Letters
    Issue number4
    Publication statusPublished - 2020 Apr 6

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Biomedical Engineering
    • Materials Science(all)


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