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Ladder-Structured Polysilsesquioxane/Al2O3 Nanocomposites for Transparent Wear-Resistant Windows

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Abstract

As a protective layer for deformable displays, we synthesized ladder-type polysilsesquioxanes (LPSQs) containing cyclic epoxy as a curable unit. The mechanical properties after photo- and thermal-curing of LPSQs with a small amount of added Al2O3 nanoparticles were compared with those of the pure LPSQs. The prepared LPSQ-Al2O3 nanocomposites and the pure LPSQs exhibited comparable optical transparencies and thermal stabilities. In addition, the degree of conversion of the applied epoxy units in LPSQs and the resulting mechanical properties, as monitored by Fourier transform infrared spectroscopy and nanoindentation tests, indicated that the addition of nanoparticles to LPSQs moderately enhanced the epoxy conversion rate and remarkably improved the wear resistance, including hardness, after photo-/thermal-curing processes. The LPSQ-Al2O3 nanocomposites achieved higher wear resistance than epoxy-silica nanocomposites containing similar curable functional groups and reinforcing fillers (silica). The excellent mechanical properties of the LPSQ-Al2O3 nanocomposites could be attributed to three-dimensionally interconnected networks of organic-inorganic hybrid-type chemical structures in the LPSQ as well as additional reinforcement from amine-functionalized Al2O3 nanoparticles covalently interconnected with the LPSQ. We believe that the devised LPSQ-Al2O3 nanocomposites could serve effectively as a wear-resistant platform for deformable display windows.

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Authors and Affiliations

  1. Department of Organic and Nano System Engineering, Konkuk University, Seoul, 05029, Korea

    Yejin Ahn, Min Seon Kim & Bong-Gi Kim

  2. Department of Chemical Engineering, Inha University, Incheon, 22212, Korea

    Sunyoo Kim & Ji Ho Youk

Authors
  1. Yejin Ahn
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  2. Sunyoo Kim
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  3. Min Seon Kim
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  4. Ji Ho Youk
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  5. Bong-Gi Kim
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Correspondence to Ji Ho Youk or Bong-Gi Kim.

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Ahn, Y., Kim, S., Kim, M.S. et al. Ladder-Structured Polysilsesquioxane/Al2O3 Nanocomposites for Transparent Wear-Resistant Windows. Fibers Polym 19, 1295–1302 (2018). https://doi.org/10.1007/s12221-018-8217-9

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  • DOI: https://doi.org/10.1007/s12221-018-8217-9

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