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Development of a prediction method and diagram representation of optical properties of cellulose derivatives based on computational chemistry

Research Project

Project/Area Number 16K18733
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Wood science
Research InstitutionShowa University (2017-2018)
Kitasato University (2016)

Principal Investigator

Hayakawa Daichi  昭和大学, 薬学部, 助教 (20761141)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsセルロース誘導体 / 複屈折 / 計算化学 / 密度汎関数法 / 光学フィルム / 複屈折予測 / 光学特性ダイアグラム / セルロースアセテート / 複屈折の計算 / セルロース科学 / 高分子構造・物性
Outline of Final Research Achievements

Cellulose derivatives are widely used as optical films such as a protective film of the polarizing plate of liquid crystal display. Understanding the relations between the three-dimensional molecular structure of cellulose derivatives and its birefringence are required for the rational design of more advanced optical films. In this work, I developed a new method to predict the birefringence of the films of cellulose derivatives. Additionally, the computer programs to carry out the calculations were developed. The test calculations were carried out for the cellulose derivative whose birefringence is known. The calculated birefringence is in accord with the experimental one. This new calculation method would be a useful tool for the birefringence prediction of the cellulose derivatives and the rational molecular design.

Academic Significance and Societal Importance of the Research Achievements

セルロース誘導体の一種であるセルロースアセテート(CA)は、光学フィルムとして広く工業利用されている。先行研究において、CAの分子構造と複屈折の関係を説明するモデルがマクロな実験結果に基づいて考案されていた。本研究では、考案した手法と計算プログラムを用いて、CAの分子構造と複屈折の波長依存性の関係を原子・電子レベルのミクロな立場から調べた。この結果、先行研究のモデルがミクロな観点からも妥当であることを理論計算により示すことができた。加えて、本手法は複屈折を適切に予測できることがわかったので、複屈折が未知のセルロース誘導体に適用することで、電子計算機を活用した合理的分子設計への活用が期待できる。

Report

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

    (3 results)

All 2019 2018 2016

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (2 results)

  • [Journal Article] DFT study of the influence of acetyl groups of cellulose acetate on its intrinsic birefringence and wavelength dependence2019

    • Author(s)
      Hayakawa Daichi、Gouda Hiroaki、Hirono Shuichi、Ueda Kazuyoshi
    • Journal Title

      Carbohydrate Polymers

      Volume: 207 Pages: 122-130

    • DOI

      10.1016/j.carbpol.2018.11.074

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] セルロースアセテートのアセチル基が 固有複屈折へ及ぼす影響の計算化学による検2018

    • Author(s)
      早川大地、合田浩明、上田一義
    • Organizer
      セルロース学会第25回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] セルロース誘導体の側鎖が分極率異方性に及ぼす影響の計算化学による評価2016

    • Author(s)
      早川大地、広野修一、上田一義
    • Organizer
      セルロース学会第23回年次大会
    • Place of Presentation
      つくばカピオ、つくば市
    • Year and Date
      2016-07-14
    • Related Report
      2016 Research-status Report

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

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