Formation of percolation structure in metals and and innovation of manufacturing methods for stretchable conductive materials

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K21127
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 28:Nano/micro science and related fields
• Research Institution: Kyoto Institute of Technology
• Principal Investigator: Nakanishi Hideyuki 京都工芸繊維大学, 材料化学系, 教授 (20619655)
• Project Period (FY): 2020-07-30 – 2023-03-31
• Keywords: 伸縮性導体

Outline of Final Research Achievements

A method for fabricating stretchable conductive materials using metallic nanoparticles was studied. Using the proposed fabrication method, metal could be introduced into the interior of polymeric materials (fibers), thereby suppressing the breaking of electrical paths due to elongation of the material. It was confirmed that, depending on the fabrication conditions, the sample showed significant changes in the spatial distribution of the metal developed inside the fiber and other properties, such as electrical conductivity and elasticity, which in turn significantly changed. When the fabrication conditions were adjusted, it was possible to fabricate an elastic conductive material that exhibited good electrical conductivity of 100S/cm or higher in the range of 0 to 150% strain without compromising the excellent elasticity of the original fiber.

Free Research Field

材料化学

Academic Significance and Societal Importance of the Research Achievements

伸縮性導電材料の製法は、複雑な手法や特殊な操作を必要とする事が多く、一般性に欠けることが多かった。本研究では、金属ナノ粒子を用いて、材料を溶液に浸すことで、簡単に導電化できる製法を開発した。作製条件の調整を行う事で、最大で1000S/cm以上の高い電気伝導率が得られるだけでなく、伸縮性も保持することが可能であった。製法の単純さと得られる優れた性質の観点から、提案した製法は伸縮性導電材料の新しい作製手法として、今後のさらなる発展が期待された。