[2PS-256]
Effect of Fluorinated Thiol-Modified Polysilsesquioxanes on Surface Energy, Viscoelasticity, and Self-Healing Performance
발표자백정주 (한국생산기술연구원)
연구책임자신교직 (한국생산기술연구원)
Abstract
Polysilsesquioxanes (PSQs) are promising materials for protective coatings due to the robust thermal, chemical, and mechanical stability of their siloxane (Si–O–Si) networks. In this study, thiol-modified PSQs were synthesized via a sol–gel reaction to integrate self-healing functionality into hard coatings. To examine the influence of surface energy on self-healing and viscoelastic behavior, two variants were compared: a thiol-functionalized PSQ (R-TS) and a fluorine-containing thiol-modified PSQ (R-FATS). The thiol groups were transformed into reversible disulfide bonds through a photochemical process mediated by a photobase generator. The R-FATS coating exhibited enhanced hydrophobicity, which was attributed to the reduced surface energy of fluorinated groups. This lowered surface energy promoted interfacial chain mobility, resulting in improved self-healing efficiency and distinct viscoelastic behavior compared to the non-fluorinated R-TS coating.