Study on Kinetics of Epoxy Resin Decomposition and Evaluation of Recovered Carbon Fibers from CFRP by Nitric Acid Treatment Aiming for the Recycling of both Resin and Carbon Fibers

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  • Asuka Sakai
    Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology. **Environment and Energy Engineering Section, Environment and Facility Department, Vehicle Production Engineering and Development Division, Nissan Motor Co., LTD.
  • Winarto Kurniawan
    Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology.
  • Masatoshi Kubouchi
    Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology.
  • Mitsuhiro Inui
    **Environment and Energy Engineering Section, Environment and Facility Department, Vehicle Production Engineering and Development Division, Nissan Motor Co., LTD.
  • Atsushi Mizutani
    Planning and Administration Section, Vehicle Production Engineering and Development Division, Nissan Motor Co., LTD.
  • Taro Kuroda
    Planning and Administration Section, Vehicle Production Engineering and Development Division, Nissan Motor Co., LTD.

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Other Title
  • CFRPの全リサイクルを目指した硝酸分解法による樹脂分解挙動の 速度論的考察及びリサイクル炭素繊維の物性評価
  • CFRP ノ ゼン リサイクル オ メザシタ ショウサン ブンカイホウ ニ ヨル ジュシ ブンカイ キョドウ ノ ソクドロンテキ コウサツ オヨビ リサイクル タンソ センイ ノ ブッセイ ヒョウカ

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Abstract

<p>Carbon Fiber Reinforced Plastics (CFRP) is a lightweight and high-strength material, which make its usage expanding in many industries. We have been studying a recycling method of epoxy resin using nitric acid under mild condition, and in this research, this method was used as a basis to develop CFRP recycling method. The physical properties of recovered carbon fibers were evaluated to assess the applicability of this method. CFRP waste which is projected to be disposed in large quantity in the future was prepared as a sample. By immersing this CFRP specimen into 8 M of nitric acid at 80℃ for 24 hours, both resin-free carbon fiber and recyclable decomposed resin could be recovered. The recovered carbon fiber shows higher value of tensile strength and interfacial shear strength compared to virgin carbon fiber. Therefore, it was shown that this nitric acid decomposition method is an effective method for carbon fiber recovery.</p>

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