Development of magnetostrictive paper reversibly self-transformable magnetostrictive origami from 2D to 3D by applying a magnetic field

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K14836
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 18010:Mechanics of materials and materials-related
• Research Institution: Tohoku University
• Principal Investigator: Kurita Hiroki 東北大学, 環境科研究科, 助教 (40643226)
• Project Period (FY): 2019-04-01 – 2021-03-31
• Keywords: 磁歪 / セルロースナノファイバー / 複合材料

Outline of Final Research Achievements

A magnetostrictive material is deformed by an external magnetic field (i.e. magnetostrictive effect) and changes the surrounding magnetic field by a load (i.e. inverse magnetostrictive effect). Because magnetostrictive material generates electrical power from mechanical impact and vibration using a coil, magnetostrictive material attracts attention as an energy harvesting material. Terfenol-D (Tb-Dy-Fe alloy) and Galfenol (Fe-Ga alloy) are well-known as magnetostrictive materials, However, these materials are brittle (i.e. low workability) and expensive. Hence, magnetostrictive particle dispersed polymer matrix composites have been considered in previous studies. In this study, we focus on Fe-Co alloy and fabricated Fe-Co alloy particle dispersed cellulose nanofiber (CNF-FeCo) paper and investigated their magnetostriction. Few CNF-FeCo paper showed higher magnetostriction (close to 200 ppm) than that of Fe-Co thin film (70 ppm).

Free Research Field

複合材料設計学

Academic Significance and Societal Importance of the Research Achievements

本研究により，高い磁歪特性を有する紙が作成できることがわかった．この磁歪折り紙は，将来的に，可逆的な二次元(2D)材料の三次元(3D)変形技術の開発へと発展し，変形可能な電池，3D電子部品，自己折りたたみ式ロボットなどの設計を可能とする．さらに，本研究から得られる可逆的に自己3D変形可能な磁歪折り紙は副次的に持ち運び・折りたたみが可能な磁歪センサ・アクチュエータ，逆磁歪効果を利用した環境発電可能な紙も実現できると考えられる．