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Self-propulsion control of an oil droplet using chemical reaction and the application to in-water object transportation

Research Project

Project/Area Number 19K21950
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 20:Mechanical dynamics, robotics, and related fields
Research InstitutionWaseda University

Principal Investigator

Sawada Hideyuki  早稲田大学, 理工学術院, 教授 (00308206)

Co-Investigator(Kenkyū-buntansha) 前田 真吾  芝浦工業大学, 工学部, 教授 (40424808)
重宗 宏毅  芝浦工業大学, 工学部, 准教授 (40822466)
Project Period (FY) 2019-06-28 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords油滴 / マランゴニ対流 / 化学反応 / 自走油滴 / オレイン酸 / 界面活性剤 / 形状記憶合金ワイヤ / 水中物体搬送 / SMAワイヤ / 自走 / 水中搬送 / 外骨格 / ドラッグデリバリー制御
Outline of Research at the Start

無水オレイン酸を主成分とする油滴を界面活性剤の水溶液に滴下すると,油滴界面に溶液の濃度差ができ,その内部にマランゴニ対流が発生して自走を始める.自走のエネルギーは油滴界面における界面活性剤の濃度差に起因し,これは油滴内の無水オレイン酸が加水分解反応を起こすことによって保たれる.本研究では,微細な形状記憶合金ワイヤアクチュエータを油滴の外骨格として与えることで,油滴の自走方向と速度の動的制御に挑戦する.外骨格による油滴の自律変形は,対流発生の境界条件を変化させる.電気などの外部エネルギーを必要としない化学反応に起因する自律自走の制御は,ミリ・マイクロスケールにおける有力な物体移動法となり得る.

Outline of Final Research Achievements

This research proposed a novel directional control method of self-propelled oil droplets. Oil droplets locomote spontaneously with surfactant action. This self-propulsion is caused by Marangoni convection within the oil droplet due to differences in the surfactant concentration at the droplet surface. We paid attention to the observational facts that self-propelled oil droplets changed their locomotion styles depending on their shapes, and discovered that boomerang-shaped oil droplets performed the straight motion. In this study, we introduced exoskeletons for the directional and velocity control of oil droplets. Through experiments and simulation studies, we further discovered that the stability of the velocity and locomotion direction depended on the particular boomerang shapes, environmental temperature and humidity, and external vibratory stimuli. Our discovery was applied to a transporting robot driven only by the energy obtained from chemical reactions.

Academic Significance and Societal Importance of the Research Achievements

本研究では、自走油滴を流体の動きを利用した新奇なアクチュエータと見做し、これを最適に制御する手法を提案した。ソフトロボティクスの最近の研究において、流体アクチュエータが注目されており、流体の境界条件や腱となる部材を追加して束縛を増やすことで制御を試みる研究成果が報告されている。対流を利用したアクチュエータはソフトロボティクスの分野から見ても革新的であり、また油滴を物理的に変形させて自走制御する研究は、高分子の研究分野においても新奇性が高い。対流の境界条件依存性に着目し、形状を変形することで油滴を制御する試みは、分野の垣根を超えた挑戦的な研究の成果といえる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (34 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (15 results) (of which Peer Reviewed: 13 results,  Open Access: 8 results) Presentation (15 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (3 results)

  • [Int'l Joint Research] Universite Libre de Bruxelles(ベルギー)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Analysis of the Micro-vibration Characteristics of a Shape Memory Alloy Wire2023

    • Author(s)
      岩名 紘基、重宗 宏毅、澤田 秀之
    • Volume
      J106-C
    • Issue
      2
    • Pages
      79-85
    • DOI

      10.14923/transelej.2022JCP5005

    • ISSN
      1881-0217
    • Year and Date
      2023-02-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Self-Actuating and Nonelectronic Machines2022

    • Author(s)
      Maeda Shingo、Shigemune Hiroki、Sawada Hideyuki
    • Journal Title

      Journal of Robotics and Mechatronics

      Volume: 34 Issue: 2 Pages: 249-252

    • DOI

      10.20965/jrm.2022.p0249

    • ISSN
      0915-3942, 1883-8049
    • Year and Date
      2022-04-20
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis of different self-propulsion types of oil droplets based on electrostatic interaction effects2022

    • Author(s)
      Noguchi Mika、Yamada Masato、Sawada Hideyuki
    • Journal Title

      RSC Advances

      Volume: 12 Issue: 29 Pages: 18354-18362

    • DOI

      10.1039/d2ra02076a

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Using inverse learning for controlling bionic robotic fish with SMA actuators2022

    • Author(s)
      Ning Kewei、Hartono Pitoyo、Sawada Hideyuki
    • Journal Title

      MRS Advances

      Volume: 7 Issue: 30 Pages: 649-655

    • DOI

      10.1557/s43580-022-00328-w

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A wireless bionic soft robotic fish using shape-memory alloy actuators2022

    • Author(s)
      Ning Kewei、Sawada Hideyuki
    • Journal Title

      IAES International Journal of Robotics and Automation (IJRA)

      Volume: 11 Issue: 4 Pages: 278-278

    • DOI

      10.11591/ijra.v11i4.pp278-287

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] An untethered soft robotic fish using SMA wires and its performance analysis2021

    • Author(s)
      Chen Xiaojie、Ning Kewei、Shigemune Hiroki、Sawada Hideyuki
    • Journal Title

      International Journal of Mechatronics and Automation

      Volume: 8 Issue: 4 Pages: 229-240

    • DOI

      10.1504/ijma.2021.120384

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Investigation of the behavior of Marangoni-driven oleic droplet in different humidity,2021

    • Author(s)
      Masato Yamada, Hiroki Shigemune, Shingo Maeda, Hideyuki Sawada
    • Journal Title

      International Chemical Congress of Pacific Basin Societies

      Volume: Pacifichem2021

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Temperature and Humidity Dependence of Marangoni Convection and Its Effect on the Self-propulsion of an Oil Droplet2021

    • Author(s)
      Masato Yamada, Hiroki Shigemune, Shingo Maeda, Hideyuki Sawada
    • Journal Title

      Chemistry Letters

      Volume: Vol.50, No.3 Issue: 3 Pages: 493-496

    • DOI

      10.1246/cl.200842

    • NAID

      130007995522

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Programming Stepwise Motility into a Sheet of Paper Using Inkjet Printing2020

    • Author(s)
      Hiroki Shigemune, Shingo Maeda, Eiji Iwase, Shuji Hashimoto, Shigeki Sugano, Hideyuki Sawada
    • Journal Title

      Advanced Intelligent Systems

      Volume: 3 Issue: 1 Pages: 2000153-2000153

    • DOI

      10.1002/aisy.202000153

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] An Untethered Bionic Robotic Fish Using SMA Actuators2020

    • Author(s)
      Xiaojie Chen, Hiroki Shigemune, Hideyuki Sawada
    • Journal Title

      IEEE International Conference on Mechatronics and Automation

      Volume: ICMA2020 Pages: 1768-1773

    • DOI

      10.1109/icma49215.2020.9233798

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Directional and velocity control of active droplets using a rigid-frame2019

    • Author(s)
      Masato Yamada, Hiroki Shigemune, Shingo Maeda and Hideyuki Sawada
    • Journal Title

      Journal of Royal Society of Chemistry Advances

      Volume: Issue 69 Issue: 69 Pages: 40523-40530

    • DOI

      10.1039/c9ra07789h

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 微小振動する形状記憶合金ワイヤを用いた触覚センサ2019

    • Author(s)
      宮戸田顕音, 重宗宏毅, 三輪貴信, 澤田秀之
    • Journal Title

      電子情報通信学会 論文誌C J102-C

      Volume: No.9 Pages: 241-248

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Stability Analysis of Self-Folding Sheets on Water Surface2019

    • Author(s)
      Masato Yamada, Hiroki Shigemune and Hideyuki Sawada
    • Journal Title

      Proc. of International Symposium on Micro-NanoMechatronics and Human Science

      Volume: MHS2019 Pages: 66-68

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 運動パターンを創り出すマテリアルと知能の設計2019

    • Author(s)
      前田真吾, 澤田秀之, 重宗宏毅, 三輪貴信
    • Journal Title

      日本機械学会誌

      Volume: 122 Pages: 30-31

    • Related Report
      2019 Research-status Report
  • [Journal Article] しなやかさを生む確率情報処理とソフトロボットへの展開2019

    • Author(s)
      重宗宏毅, 前田真吾, 澤田秀之, 三輪貴信
    • Journal Title

      システム制御情報学会誌

      Volume: 63 Pages: 512-517

    • NAID

      130007854870

    • Related Report
      2019 Research-status Report
  • [Presentation] An SMA-wire-driven actuator for robotic finger2022

    • Author(s)
      Liu Renke, 澤田秀之
    • Organizer
      日本電子材料技術協会 第59回秋期講演大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 形状記憶合金ワイヤの振動特性の計測2022

    • Author(s)
      岩名紘基, 重宗宏毅, 澤田秀之
    • Organizer
      2022年電子情報通信学会総合大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 外骨格で形状固定した自走油滴の3次元内部対流シミュレーション2021

    • Author(s)
      坂叡士, 澤田秀之
    • Organizer
      ROBOMECH2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 静電相互作用を利用した複数自走油滴の挙動制御2021

    • Author(s)
      野口実香, 山田賢杜, 澤田秀之
    • Organizer
      ROBOMECH2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 揮発性液体を用いた水滴内のマランゴニ対流の生成と制御2021

    • Author(s)
      斧田拓海, 澤田秀之
    • Organizer
      ROBOMECH2021
    • Related Report
      2021 Research-status Report
  • [Presentation] A Wireless Soft Robotic Fish for the Natural Swimming Behavior2021

    • Author(s)
      Kewei Ning, Hideyuki Sawada
    • Organizer
      電子材料技術協会 第58回秋期講演大会
    • Related Report
      2021 Research-status Report
  • [Presentation] A shape-memory alloy wire that generates micro-vibration while sensing force2021

    • Author(s)
      Hideyuki Sawada
    • Organizer
      2021 International Chemical Congress of Pacific Basin Societies (Pacifichem 2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 形状記憶合金ワイヤの振動現象の解析とアクチュエータ応用について2020

    • Author(s)
      岩名紘基, 澤田秀之
    • Organizer
      日本電子材料技術協会 第57回秋期講演大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 粒子法シミュレーションによるフレーム付き自走油滴の内部対流の考察2020

    • Author(s)
      熊坂叡士, 山田賢杜, 重宗宏毅, 澤田秀之
    • Organizer
      ROBOMECH 2020
    • Related Report
      2020 Research-status Report
  • [Presentation] ワインの涙の液滴内部流の可視化によるマランゴニ対流に関する一考察2020

    • Author(s)
      斧田拓海, 重宗宏毅, 澤田秀之
    • Organizer
      ROBOMECH 2020
    • Related Report
      2020 Research-status Report
  • [Presentation] 触覚の提示・センシングを同時に行うSMAトランスデューサ2020

    • Author(s)
      宮戸田顕音, 澤田秀之
    • Organizer
      電子情報通信学会総合大会 通信講演論文集
    • Related Report
      2019 Research-status Report
  • [Presentation] Soft Actuators and Sensors with the Use of Physical Properties for Robotic Manipulations2019

    • Author(s)
      Hideyuki Sawada
    • Organizer
      2nd International Workshop on Active Matter for Soft Robotics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] A Shape-memory Alloy Wire and Its Physical Properties as Soft Actuators and Sensors2019

    • Author(s)
      Hideyuki Sawada
    • Organizer
      2nd International Workshop on Science of Soft Robots
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 機能的マテリアルとソフトロボットの知能化への展開2019

    • Author(s)
      重宗宏毅, 澤田秀之
    • Organizer
      応用物理学会 秋季学術講演会シンポジウム
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 形状に着目した自走油滴の方向制御2019

    • Author(s)
      山田賢杜, 重宗宏毅, 前田真吾, 澤田秀之
    • Organizer
      ROBOMEC 2019
    • Related Report
      2019 Research-status Report
  • [Remarks] 早稲田大学 先進理工学部 応用物理学科 澤田研究室

    • URL

      http://www.sawada.phys.waseda.ac.jp/

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Remarks] 早稲田大学 澤田研究室

    • URL

      http://www.sawada.phys.waseda.ac.jp/

    • Related Report
      2020 Research-status Report
  • [Remarks]

    • URL

      http://www.sawada.phys.waseda.ac.jp/

    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2024-01-30  

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