Stress-responsive underwater adhesion using particle-stabilized bubble

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K18891
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 26:Materials engineering and related fields
• Research Institution: Osaka Institute of Technology
• Principal Investigator: Fujii Syuji 大阪工業大学, 工学部, 教授 (70434785)
• Co-Investigator(Kenkyū-buntansha): 石田 尚之 岡山大学, 自然科学学域, 准教授 (80344133)
• Project Period (FY): 2022-06-30 – 2024-03-31
• Keywords: 泡 / 接着 / 高分子粒子 / 界面 / 刺激応答

Outline of Final Research Achievements

Based on the "wetting chemistry" the research was conducted to elucidate the correlation between the surface chemistry of the substrate (hydrophilic/hydrophobic balance) and the adsorption of the air bubble to the substrate. We also utilized particle-stabilized bubble as a stress-responsive adhesive and tried to realize a stimulus-responsive underwater adhesion technology. As a result, the following points were clarified. (1) The adsorption of the bubble improved as the hydrophobicity of the adherend increased. (2) The adherends were successfully bonded by the collapse of the particle-stabilized bubble and leakage of air. (3) The mechanism for adhesion phenomena using particle-stabilized aqueous bubble was clarified.

Free Research Field

界面化学

Academic Significance and Societal Importance of the Research Achievements

本研究では、基板の表面化学と泡の吸着性・形状の相関関係を解明し、目的箇所における任意タイミングでの接着を可能にする新規水中接着技術の開拓を目的とした。空気を「水中接着剤」として捉え、新たな接着科学を開拓した点で大きな意義がある。本研究課題で研究した接着技術は、空気を接着剤として使用するため環境適応型・簡便であり、表面に凹凸がある基材に対しても、空気がぬれ広がることで接着が可能になると期待でき、接着可能な基材の対象が広い。空気泡を用いた接着現象の理解が進むことは、様々な科学技術・日常生活の問題への解決に貢献し、各学術分野に変革をもたらす可能性を含んでいる。