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Visualizing the molecular shape of isolated lignin in miscible blend thin films

Research Project

Project/Area Number 16K14955
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Wood science
Research InstitutionGifu University

Principal Investigator

TERAMOTO Yoshikuni  岐阜大学, 応用生物科学部, 准教授 (40415716)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsリグニン / 相溶ブレンド / 薄膜 / 走査型プローブ顕微鏡(SPM) / 分子形状 / 可視化 / ブレンド / 走査型プローブ顕微鏡 / ブレンド薄膜
Outline of Final Research Achievements

Lignin is usually supposed to have a random three-dimensional network structure in wood, and its exact structure is still unclear. Chemical analysis and fine NMR have mainly accumulated structural data between monolignol dimers. GPC and light scattering have also been applied to isolated lignin, but there is a concern about the aggregation of the molecules in solution. On the other hand, in recent years, single molecule chain imaging of synthetic polymers has been achieved by scanning probe microscopy (SPM) for miscible blends. In this study, in order to obtain new information on the molecular shape of isolated lignin, we thus constructed miscible blends of enzyme-treated lignin (CEL) and different polymers and observed their thin films by SPM. Eventually, by diluting CEL with the miscible polymers, we succeeded in observing the molecular shape of CEL virtually regarded as a single molecule.

Academic Significance and Societal Importance of the Research Achievements

本課題は,研究代表者らが見出してきた単離リグニンの相溶ブレンド化の手法と,SPMによる高分子の1分子イメージングを使い,単離リグニンの分子形状の理解のための新しい情報を提供するものである。本研究で手法を確立することができたため,今後のデータの蓄積によって,樹種,部位,組織等によるリグニン分子の形状の違いが明確になる可能性がある。一方,リグニンの近傍には常に多糖が共存している。多糖混在量を変化させて分子形状を可視化することによって,多糖とリグニンの共存様式にも知見を与え得る。ひいては,紙パルプ産業やバイオ燃料製造で必要とされるリグニンの化学処理の最適化につながる可能性がある。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (8 results)

All 2019 2018 2017 2016

All Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] Direct Observation of Lignin Molecules Isolated in Miscible Polymer Blends by Atomic Force Microscopy2019

    • Author(s)
      Asaoka, M., Miyamori, Y., Katsu, N. & Teramoto, Y.
    • Organizer
      2018 SWST/JWRS Int. Conv.
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 相溶するポリマーで希釈した単離リグニン分子の原子間力顕微鏡観察2019

    • Author(s)
      朝岡美帆, 宮森雄大, 勝永毅, 寺本好邦
    • Organizer
      第69回日本木材学会大会(函館大会)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 原子間力顕微鏡による単離リグニン孤立分子の直接観察2018

    • Author(s)
      宮森雄大, 朝岡美帆, 葭谷耕三, 勝永毅, 寺本好邦
    • Organizer
      第68回日本木材学会大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 原子間力顕微鏡による単離リグニン孤立分子の直接観察2017

    • Author(s)
      宮森雄大, 勝永毅, 葭谷耕三, 寺本好邦
    • Organizer
      第62回リグニン討論会
    • Related Report
      2017 Research-status Report
  • [Presentation] 分子運動性解析による多糖/リグニンのナノスコピックな共存形態の評価(学生口頭発表賞受賞)2017

    • Author(s)
      勝永毅, 葭谷耕三, 寺本好邦,
    • Organizer
      第62回リグニン討論会
    • Related Report
      2017 Research-status Report
  • [Presentation] Nanoscale evaluation of polysaccharide/lignin mixing states in lignocellulosic biomass2017

    • Author(s)
      Katsu N., Teramoto Y.
    • Organizer
      The 4th International Cellulose Conference ICC 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 木粉中の多糖/リグニンのナノスコピックな平均的緊密度の評価2017

    • Author(s)
      勝永毅,葭谷耕三,寺本好邦
    • Organizer
      第67回日本木材学会大会(福岡大会)
    • Place of Presentation
      九州大学箱崎キャンパス
    • Related Report
      2016 Research-status Report
  • [Presentation] 木材中の多糖/リグニンの混在スケールの評価2016

    • Author(s)
      勝永毅,葭谷耕三,寺本好邦
    • Organizer
      第61回リグニン討論会
    • Place of Presentation
      京都大学宇治キャンパス
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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