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Development of temperature dependent infrared reflective filter with autonomous control function

Research Project

Project/Area Number 20K04632
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21060:Electron device and electronic equipment-related
Research InstitutionKobe City College of Technology

Principal Investigator

Ogiwara Akifumi  神戸市立工業高等専門学校, その他部局等, 教授 (00342569)

Co-Investigator(Kenkyū-buntansha) 垣内田 洋  国立研究開発法人産業技術総合研究所, 材料・化学領域, 主任研究員 (40343660)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords液晶 / 高分子 / 赤外線 / 温度 / 分光 / 太陽光 / 分光測定 / 紫外線照射 / 液晶材料 / 光機能デバイス
Outline of Research at the Start

本研究課題は、有機複合体材料(液晶、光異性化材料、高分子材料)に紫外線照射プロセスを適用し、螺旋形状の多層膜構造を一括形成し、温度変化に応じて螺旋周期の長さや分布を制御可能な光デバイスを開発するものである。このデバイスは、低温時に赤外領域の選択反射帯域を狭めて熱線を屋内に取り入れて熱として利用でき、高温時は帯域幅を大きく拡げて熱線の屋内への侵入を遮断して冷房効果を高めることができる。このデバイスを窓部材等に応用すれば、住居等の窓を介して屋内に侵入する太陽光からの赤外線波長帯域の光を選択して、遮断・透過が可能な自律的制御機能を有する感温型赤外線反射フィルタとして応用することができる。

Outline of Final Research Achievements

We have configured a spectroscopic measurements system connected with UV irradiation (UV-LED) for fabrication of temperature dependent infrared reflective filter composed of cholesteric liquid crystal materials with monomers. The optical characteristics such as selective reflective function in infrared region induced in the fabricated device were confirmed by using the optical system. The effects of shifting and broadening in selective reflective bandwidth could be controlled by temperature increase and UV irradiation energy amount. Thus we developed the temperature dependent infrared reflective filter with autonomous control function for solar ray based on the quantitative measurement and evaluation of the relationship between the UV irradiation dose and the selective reflection bandwidth.

Academic Significance and Societal Importance of the Research Achievements

本研究では、液晶・高分子複合体材料に対して紫外線照射と分光透過率測定を組合わせたデバイス作製システムを構築した。このシステムを用いて、選択反射帯域幅の拡がリやシフトの様子をリアルタイムで観察することができた。この研究を通じて環境負荷の少ない有機材料としての液晶・高分子複合体材料を用い、太陽光中の近赤外波長帯域の日射エネルギーに対する選択反射機能を温度変化に応じて制御できるデバイスの開発に取り組んだ。このデバイスは、四季の移り変わりに伴う環境温度変化に応じた日射エネルギーの屋内への侵入量の制御可能性を有しており、今後の持続可能な省エネルギー化技術への貢献が期待できる。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (17 results)

All 2023 2022 2021

All Journal Article (12 results) (of which Peer Reviewed: 12 results,  Open Access: 1 results) Presentation (5 results)

  • [Journal Article] Liquid Crystal Composites for Thermoresponsive Controllability of Solar Transmittance2022

    • Author(s)
      垣内田 洋 , 荻原 昭文
    • Journal Title

      Vacuum and Surface Science

      Volume: 65 Issue: 10 Pages: 460-465

    • DOI

      10.1380/vss.65.460

    • ISSN
      2433-5835, 2433-5843
    • Year and Date
      2022-10-10
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thermoresponsive mobility of liquid crystals and reactive mesogens during photopolymerization-induced phase separation2022

    • Author(s)
      Hiroshi Kakiuchida, Akihiko Matsuyama, Eiichi Kobayashi, and Akifumi Ogiwara
    • Journal Title

      PHYSICAL REVIEW E

      Volume: 106 Issue: 4

    • DOI

      10.1103/physreve.106.044704

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Practical thermoresponsive switchable windows of PNLCs - Durable, affordable, and adaptable2022

    • Author(s)
      Hiroshi Kakiuchida and Akifumi Ogiwara
    • Journal Title

      28th International Liquid Crystal Conference

      Volume: 28

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] TEMPERATURE DEPENDENT POLYMER-DISPERSED LIQUID CRYSTAL DIFFUSER FOR SOLAR-RAY CONTROL APPLICATION2022

    • Author(s)
      Akifumi Ogiwara1 and Hiroshi Kakiuchida
    • Journal Title

      Grand RE2022 International Conference

      Volume: 100434 Pages: 100434-100434

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analysis of optical properties and internal structures of γ-ray-irradiated holographic devices formed using liquid crystal Composites2022

    • Author(s)
      Akifumi Ogiwara and Minoru Watanabe
    • Journal Title

      Optical Materials

      Volume: 123 Pages: 1-8

    • DOI

      10.1016/j.optmat.2021.111932

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Thermoresponsive Reflective Scattering of Meso-Scale Phase Separation Structures of Uniaxially Orientation-Ordered Liquid Crystals and Reactive Mesogens2021

    • Author(s)
      Kakiuchida Hiroshi、Kabata Masayuki、Matsuyama Takanori、Ogiwara Akifumi
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 13 Issue: 34 Pages: 41066-41074

    • DOI

      10.1021/acsami.1c10377

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Thermally responsive polymer-dispersed liquid crystal diffusers fabricated using laser speckle pattern irradiation2021

    • Author(s)
      Ogiwara Akifumi、Kakiuchida Hiroshi
    • Journal Title

      Applied Optics

      Volume: 60 Issue: 32 Pages: 10246-10246

    • DOI

      10.1364/ao.443216

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Holographic gratings formed by wavelength multiplexing in liquid crystal composites2021

    • Author(s)
      Akifumi Ogiwara and Minoru Watanabe
    • Journal Title

      Micro Optics Conference (MOC2021) Technical Digest

      Volume: P-23 Pages: 188-189

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Formation of temperature dependent polymer dispersed liquid crystal using laser speckle pattern irradiation2021

    • Author(s)
      Akifumi Ogiwara and Hiroshi Kakiuchida
    • Journal Title

      Micro Optics Conference (MOC2021) Technical Digest

      Volume: P-24 Pages: 190-191

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Selective light diffusion of polymer network liquid crystals formed through photopolymerization induced phase separation by nonuniform photoirradiation2021

    • Author(s)
      Hiroshi Kakiuchida and Akifumi Ogiwara
    • Journal Title

      19th Edition of Optics of Liquid Crystals 2021 Abstract

      Volume: O31 Pages: 1-1

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Optically reconfigurable gate array with a 1 Grad total-ionizing-dose tolerant holographic memory2021

    • Author(s)
      Junya Ishido, Minoru Watanabe, Akifumi Ogiwara
    • Journal Title

      2021 IEEE Photonics Conference

      Volume: MG2.4 Pages: 1-1

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of a radiation dose in gamma-ray irradiation fields on holographic gratings formed by liquid crystal composites2021

    • Author(s)
      Akifumi Ogiwara, Makishi Toda, Junya Ishido, Minoru, Watanabe, and Hiroshi Kakiuchida
    • Journal Title

      OSA Continuum

      Volume: 4 Issue: 2 Pages: 514-528

    • DOI

      10.1364/osac.415702

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 液晶・高分子材料への波長多重記録によるホログラフィックメモリ作製2023

    • Author(s)
      荻原 昭文,渡邊 実
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 高分子ネットワーク液晶で作製した光拡散偏光子 -形成機構の解明と光学性能の向上-2023

    • Author(s)
      垣内田 洋, 荻原 昭文
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 光重合誘起相分離過程における液晶と反応性メソゲンの分子配向秩序の熱応答挙動2022

    • Author(s)
      垣内田 洋, 松山 明彦, 小林 英一, 荻原 昭文
    • Organizer
      2022年日本液晶学会討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 高分子ネットワーク液晶で作製した偏光性と偏向性と刺激応答性をもった光拡散素子2022

    • Author(s)
      垣内田 洋, 荻原 昭文
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 半球透過率制御性の高い熱応答型高分子ネットワーク液晶2021

    • Author(s)
      垣内田 洋, 加畑雅之,松山剛知, 荻原昭文
    • Organizer
      2021年日本液晶学会討論会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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