Fabrication of stimulus-responsive molecular layer using bond cleavage reactions for dismantlable adhesion interface

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K15360
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 35030:Organic functional materials-related
• Research Institution: Tokyo Institute of Technology (2022); National Institute of Advanced Industrial Science and Technology (2020-2021)
• Principal Investigator: Aizawa Miho 東京工業大学, 科学技術創成研究院, 助教 (30849948)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 光応答性分子 / 分子層 / 開裂反応 / 易剥離 / 刺激応答

Outline of Final Research Achievements

Dismantlable adhesion technology, which allows switching between bonding and debonding states using external stimuli, has received attention due to the demand for recycling of multi-component products and simplifying the repairing process. In this study, we fabricated a thermo- and photocleavable molecular layer consisted with anthracene moieties and investigated the effect of covalent bonds at the adhesion interface on the adhesion strength. We prepared a molecular layer using synthesized anthracene dimers, and detected the chemical bond cleavages in the molecular layer induced through heating or light irradiation. We successfully observed the reduction of the peel strength by the stimulation, which implies the research concept of the cleavable molecular layer has a potential to further understanding of adhesion mechanisms and can contribute to the development of dismantling adhesion technologies.

Free Research Field

機能材料化学

Academic Significance and Societal Importance of the Research Achievements

界面における接着原理については，接着剤と基材との物理的な絡まり合いや，共有結合や水素結合などの化学的な結合エネルギーの作用などが提唱されている。しかしながら，接着に与える影響を結合様式ごとに区別して判断することは困難である。本研究では，結合の生成と解離を光や熱により直接的に制御可能な官能基を組み込んだ開裂分子層を接着界面に形成し，界面の化学結合が接着に及ぼす影響について知見を得ることに成功した。さらに，効率的な刺激応答性易剥離技術としての応用可能性を見出した本研究は，近年のものづくりにおいて需要が高まっている易剥離技術の新たな方法として提案できる。