Transfer and Amplification of Cyanostilbene Molecular Function to Advanced Flexible Optical Paints Through Self-Crosslinkable Side-Chain Liquid Crystal Polysiloxanes
- Transfer and Amplification of Cyanostilbene Molecular Function to Advanced Flexible Optical Paints Through Self-Crosslinkable Side-Chain Liquid Crystal Polysiloxanes
- 김대윤; Jahyeon Koo; Junhwa Jang; Seok-In Lim; Mintaek Oh; Kyung Min Lee; Micheal E. McConney; Luciano De Sio; Kwang-Un Jeong
- 유연신축기재; 선형발광재료; 액정성고분자; 광학용페인트
- Issue Date
- Materials Horizons
- VOL 8-1569
- A self-crosslinkable side-chain liquid crystal polysiloxane containing cyanostilbene (Si-CSM) was newly synthesized for the development of a new generation of flexible optical paints. The photoisomerization of the cyanostilbene moiety at the molecular level was transferred and amplified to the phase transition of Si-CSM, resulting in changes in the macroscopic optical properties of the Si-CSM thin film. The self-crosslinking reaction between Si-H groups in the Si-CSM polymer backbone caused the self-crosslinked Si-CSM thin film to be very elastic and both thermally and chemically stable. Therefore, the self-crosslinked Si-CSM thin film endured stretching and bending deformations under relatively harsh conditions. In addition, the uniaxially oriented and self-crosslinked Si-CSM thin film generated linearly polarized light emission. Polarizationdependent and photopatternable secret coatings were fabricated via a spontaneous self-crosslinking reaction after coating the Si-CSM paint and irradiating ultraviolet (UV) light through a photomask. This newly developed flexible optical Si-CSM paint can be applied in next-generation optical coatings.
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