[O1-14]
Tunable Adhesion Strength of Donor-Acceptor Stenhouse Adduct Embedded Polymer Matrix under Visible-Light Irradiation
발표자권민경 (부산대학교)
연구책임자이재준 (부산대학교)
Abstract
Tunable adhesives hold great promises for advanced material applications requiring on-demand adhesion control. Photoswitches offer a compelling strategy to achieve such tunability, enabling responsiveness at the molecular level. Donor–acceptor Stenhouse adducts (DASAs) are particularly attractive due to their large volumetric transformation and reversible surface polarity changes upon visible light exposure. In this study, we synthesized a crosslinked network comprising polyethyleneimine (PEI) and bisphenol A diglycidyl ether, with covalently integrated DASA moieties. The photo-responsive adhesion of the DASA-functionalized films was quantified using probe tack tests and AFM-based force distance measurements before and after visible light irradiation. To optimize adhesion tunability, we systematically modulated both surface properties and bulk stiffness of the films. This switchable adhesive system presents a versatile platform for applications requiring dynamic, controllable adhesion.