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Fabrication of Conductive Metallic Micro needles by Superplastic Deformation and Its Fracture for Medical and Biochemical Applications

Research Project

Project/Area Number 20K21074
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

FURUSHIMA TSUYOSHI  東京大学, 生産技術研究所, 准教授 (30444938)

Project Period (FY) 2020-07-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Keywordsダイレス引抜き / 超塑性変形 / 破壊 / 金属マイクロニードル / ライフセルアトラス / 導電性
Outline of Research at the Start

本研究の目的は,導電性金属材料の中空マイクロニードルを作製する新手法を開発することである.そのための革新的な加工原理として,従来から知られている金属材料が数百%の大きな伸びを示す超塑性変形現象の枠組みをさらに拡張させた超塑性変形・破壊現象を本研究では新たに提唱する.超塑性変形・破壊現象を利用し,金属材料をまるでガラス管の加工のように引張り切ることにより,これまでにない新たな加工原理による超極細先端径を有する導電性金属マイクロニードルの創製を実現する.

Outline of Final Research Achievements

In this study, an novel manufacturing process of superplastic deformation and fracture to fabricate tubuler microneedles of metallic materials was proposed. The outer diameter distribution can be controlled by varying the speed ratio to various desired taper shapes, and ultrafine metal tubuler microneedles with a tip diameter of approximately 50 μm were successfully fabricated by using fracture phenomenon. These results indicate that we have succeeded in developing an innovative fabrication method to realize metal tubuler microneedles with ultra-fine tip diameter by inducing large deformation of the superplastic material and finally forcing it to fracture.

Academic Significance and Societal Importance of the Research Achievements

新しい金属マイクロニードルを使うことで,1個の細胞のメカニズム解析による細胞が変化する瞬間を効率的に顕微鏡下にて瞬間的に拾い上げることができ,今後,疾患など体内で生じるメカニズムを調べる上で,この手法が主流となりえる.またライフサイエンス研究を推進させることができる.また本研究のアイデアはこれまでの塑性加工の常識を覆し,あえて変形の先にある破壊現象を制御することによって新たな塑性加工の価値を創出することにあり,学術的な研究面としても非常にこれまでにない発想に基づいており,従来の変形加工技術の概念を覆す可能性は十分に備えているといえる.

Report

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

    (5 results)

All 2021 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (1 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Evaluation of high-temperature tensile behavior for metal foils by a novel resistance heating assisted tensile testing system using samples with optimized structures2021

    • Author(s)
      Zheng Qiu、Furushima Tsuyoshi
    • Journal Title

      Journal of Materials Science & Technology

      Volume: 94 Pages: 216-229

    • DOI

      10.1016/j.jmst.2021.03.061

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Effects of forming conditions on microstructure and mechanical properties of Zn-22Al superplastic microtubes fabricated by direct extrusion2021

    • Author(s)
      Yushi, Yi, 小峰久直,古島剛
    • Organizer
      2021年度 塑性加工春季講演会
    • Related Report
      2021 Annual Research Report
  • [Remarks] 変形加工学研究室Website

    • URL

      https://www.furulab.iis.u-tokyo.ac.jp/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 東京大学生産技術研究所変形加工学研究室

    • URL

      https://www.furulab.iis.u-tokyo.ac.jp/

    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] 金属製中空マイクロニードルの製造方法、および金属製中空マイクロニードル2021

    • Inventor(s)
      古島 剛
    • Industrial Property Rights Holder
      古島 剛
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-011413
    • Filing Date
      2021
    • Related Report
      2021 Annual Research Report 2020 Research-status Report

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Published: 2020-08-03   Modified: 2023-01-30  

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