Development of high performance adhesives composed of rigid and flexible siloxane polymers containing catechol structures

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02781
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 35020:Polymer materials-related
• Research Institution: Kagoshima University
• Principal Investigator: Kaneko Yoshiro 鹿児島大学, 理工学域工学系, 准教授 (80404474)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 接着剤 / カテコール / ポリシルセスキオキサン / ポリシロキサン / ハイブリッド

Outline of Final Research Achievements

The objective of this research is to develop strong adhesives capable of adhering between dissimilar materials by introducing catechol components into the side chains of ladder-like polysilsesquioxane (PSQ) and linear polysiloxane (PS), which are siloxane-bonded framework polymers with excellent weather resistance, heat resistance, and flexibility. In particular, the adhesives in which the catechol component was introduced into the linear PS exhibited strong adhesion to tensile shear in adhesion of metals such as aluminum. Furthermore, in the adhesion between dissimilar materials such as aluminum and stainless steel, they did not peel off even when the temperature was changed, i.e., they also functioned as adhesives for dissimilar materials.

Free Research Field

高分子化学、材料化学

Academic Significance and Societal Importance of the Research Achievements

異種材料に対する接着剤においては、温度変化によって生じる歪みによる応力を緩和する必要があるため、接着剤を構成するポリマー中に柔軟な構造を組み込まなければならない。一方で、構造用接着剤においては、接着剤自体の強度も重要であるが、柔軟な構造のポリマーはこの点で問題となる。本研究で開発されたカテコール成分含有シロキサンポリマーは、このトレードオフの関係にあった課題を解決する接着剤として、自動車産業等への応用が期待される。