POS4-1020
Flexible Optical Paints Based on Self-Crosslinkable Cyanostilbene Side-Chain Polysiloxanes
Topic
S4. Colloids, Interfaces, and Molecular Assemblies for Functional Soft Materials
When and Where
Oct 1, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Jinkee HONG
Ki Su KIM
Presenter(s)
Yebeen Seong (Jeonbuk National University)
Co-Author(s)
Abstract
In polymer network systems for stimuli-responsive optical materials, it is important to simultaneously achieve molecular mobility and material stability. We developed a flexible optical paint by introducing cyanostilbene side chains into a flexible polysiloxane backbone (Si-CS) and forming a self-crosslinked network through residual Si-H groups. The photoresponsive behavior of this polymer enabled light-induced optical changes in both transmittance and luminescence even in the solid state, while the self-crosslinking reaction enhanced its flexibility and stability. Upon UV irradiation, the transmittance rapidly increased to more than 80%, and the emission peak blue-shifted from 462 to 441 nm. After self-crosslinking, the film maintained its stability at 180 °C and under 100% strain. Furthermore, photopatterning, polarized light emission, and coating on flexible substrates demonstrated the potential of this material as a security optical coating. This work is supported by the BK21 Four and the Bilateral Exchange Program (RS-2026-25442827).
