Transfer and Amplification of Cyanostilbene Molecular Function to Advanced Flexible Optical Paints Through Self-Crosslinkable Side-Chain Liquid Crystal Polysiloxanes

Title
Transfer and Amplification of Cyanostilbene Molecular Function to Advanced Flexible Optical Paints Through Self-Crosslinkable Side-Chain Liquid Crystal Polysiloxanes
Authors
김대윤Jahyeon KooJunhwa JangSeok-In LimMintaek OhKyung Min LeeMicheal E. McConneyLuciano De SioKwang-Un Jeong
Keywords
유연신축기재; 선형발광재료; 액정성고분자; 광학용페인트
Issue Date
2021-05
Publisher
Materials Horizons
Citation
VOL 8-1569
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/73137
ISSN
2051-6347
Appears in Collections:
KIST Publication > Article
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