Development of a dismantlable adhesive technology that can achieve multiple adhesion and dismantling

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05161
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
• Research Institution: Osaka Research Institute of Industrial Science and Technology
• Principal Investigator: TACHI HIDEKI 地方独立行政法人大阪産業技術研究所, 和泉センター, 主幹研究員 (60359429)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 易解体 / 接着剤 / 粘着剤 / 光重合 / 光分解 / 熱架橋 / 電気剥離

Outline of Final Research Achievements

In this study, we developed a dismantled adhesive that can be bonded and dismantled repeatdly.
Continuous photo-irradiation of formulations containing photo-degradable crosslinkers, acrylic monomers, photoinitiators, multifunctional polyols, and multifunctional isocyanates resulted in continuous photo-polymerization and photo-degradation, enabling construction of recrosslinkable systems by heating after photo-irradiation. However, with respect to subsequent re-decomposition, re-decomposition occurred slightly, and re-crosslinkability with a significant change in physical properties was not achieved.
We also examined an ionic liquid into the adhesive and attempted to evaluate its electrical peelability and repeatability characteristics by applying voltage. We were able to fabricate a new adhesive that is peelable and can be used multiple times by the application of voltage.

Free Research Field

粘着・接着分野

Academic Significance and Societal Importance of the Research Achievements

近年のグリーンケミストリーやサステナブルなどの環境意識の高まりから解体性を有する易解体性材料は非常に注目を集めている。解体性は粘・接着剤の特徴である「くっつく、接合」という性質とは相反する性質であるため、解体性と粘・接着特性の両立が非常に難しい。解体性粘・接着剤の研究は報告例が少なく、実用に近い技術は十分には確立されていない。本研究は、報告例の少ない易解体性接着技術に関して新しい材料を提供するとともに、可逆性のある複数回利用に取り組んだものである。接着剤では重合後の解架橋、その後の再接着までを達成しており、粘着剤では新しい発想の基に複数回利用を達成することができた。