<b>Synthesis of Epoxy Resins from Steam-Exploded Lignin and Preparation of </b><b>Epoxy Thermosetting Resin from Biomass Resources </b>

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  • KAWANO Yusuke
    Graduate School of Engineering, Yokohama National University (79－5, Tokiwadai, Hodogaya-ku, Yokohama 240－8501, Japan)
  • OYAMA Toshiyuki
    Faculty of Engineering, Yokohama National University
  • TAKAHASHI Akio
    Faculty of Engineering, Yokohama National University
  • NAKAMURA Yoshitoshi
    Department of Life System, Institute of Technology and Science, University of Tokushima

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Other Title
  • <b>水蒸気爆砕リグニンを利用したエポキシ樹脂の合成と </b><b>バイオマス由来エポキシ樹脂硬化物の作製 </b>
  • 水蒸気爆砕リグニンを利用したエポキシ樹脂の合成とバイオマス由来エポキシ樹脂硬化物の作製
  • スイジョウキバクサイリグニン オ リヨウ シタ エポキシ ジュシ ノ ゴウセイ ト バイオマス ユライ エポキシ ジュシ コウカブツ ノ サクセイ

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Abstract

Epoxidized lignin (EL) was synthesized by the reaction of steam-exploded lignin (L) with epichlorohydrin. The structure of EL was examined by FT－IR and 1H NMR spectroscopy. Epoxy groups were introduced into lignin structure.Moreover, the EL was cross-linked with two kinds of curing agents, petroleum-derived phenol novolac (PN) or Lrespectively. Thermal properties of cured EL resins were evaluated by thermogravimetry analysis and dynamic mechanical analysis. Comparison to cured conventional epoxy resin derived from petroleum, the EL resins cross-linked with PN or Lshowed higher glass transition temperature and higher char yield at 800℃. In case of L-cured EL resin, the lignin content in the cured resin reached 89wt%. It is expected that EL could be used as a biomass-based epoxy thermosseting resin.

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